CN103027655B - Lighting optical system for endoscope and illuminator - Google Patents
Lighting optical system for endoscope and illuminator Download PDFInfo
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- CN103027655B CN103027655B CN201210319118.1A CN201210319118A CN103027655B CN 103027655 B CN103027655 B CN 103027655B CN 201210319118 A CN201210319118 A CN 201210319118A CN 103027655 B CN103027655 B CN 103027655B
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Abstract
The light intensity deviation of the illumination light between endoscope-use illuminator of the present invention and optical system reduction equipment.Configure Glass rod (37) being inserted through between the light conductor (27) in fujinon electronic video endoscope (11) and the light source portion (31) in light supply apparatus (14).Glass rod (37) guides the illumination light incident from the excellent plane of incidence (37a) into excellent outgoing plane (37b) while inner face carries out reflecting.If the diameter of Glass rod (37) is D, the diameter of the guiding plane of incidence (27a) of light conductor 27 is d, illumination light is Fw relative to the full width half maximum of the light intensity of the excellent plane of incidence (37a), when the maximum offset of the incoming position of the illumination light in the radial direction of the excellent plane of incidence (37a) is A, meets
d > d.
Description
Technical field
The present invention relates to for illumination for endoscope optical system and illuminator.
Background technology
Medical fujinon electronic video endoscope possesses: the insertion section in insertosome; And for operating the operating portion of this insertion section.Camera chain and illuminating lens is provided with in the front of insertion section.Utilize and from the illumination light of illuminating lens, the look-out station in body is thrown light on.Camera chain has photographic optical system and imaging apparatus, photographs to the look-out station in illumination.From imaging apparatus export signal of video signal after blood processor carries out image procossing, as look-out station image display on a monitor.
The light conductor being done bunchy by many optical fiber passes through insertion section.The illuminating lens guiding illumination light of this light conductor side forward.The light conductor of 2 branches is divided into front to be also known.This light conductor is to 2 the illuminating lens guiding illumination light of the left and right sides being configured in imaging apparatus.
Light supply apparatus comprises: the light sources such as Xe lamp; And the light from this light source is condensed to the light-gathering optics etc. of the plane of incidence of light conductor of endoscope.As light-gathering optics, use paraboloidal mirror or collecting lens etc.
The intensity distributions of the illumination light in the plane of incidence of light conductor is uneven, this is uneven is also delivered to outgoing plane, therefore at look-out station, illumination occurs uneven.Such as, there is Light intensity higher at the middle body of the range of exposures of illumination light, but the light intensity of periphery then step-down.Thus, the lightness observing image produces uneven, makes the diagnosis in pathological changes portion become difficulty.
Therefore, known a kind of lamp optical system (such as, with reference to Japanese Laid-Open Patent Publication 59-26703 publication), in order to prevent illumination uneven, the reflection part that reflecting surface is formed as tubular is configured with between light-gathering optics and light conductor, such as Glass rod, makes the uniform illumination light of light intensity distributions incide in light conductor.In this lamp optical system, the illumination light from light-gathering optics is advanced to outgoing plane while the side face by Glass rod reflects, the light intensity distributions general uniform therefore in outgoing plane.
In addition, be divided in front in the light conductor of 2 branches, sometimes produce difference in the light intensity of the illumination light of irradiating from each illuminating lens of left and right, produce lightness inequality on the right side of image and left side.Further, because light quantity gathers one-sided illuminating lens, endoscope distal end portion becomes high temperature sometimes, produces organism burn etc.By above-mentioned Glass rod being used as the light conductor of this branching type, this problem can also be eliminated.
But light source and light-gathering optics, Glass rod, optical conductor etc. mutually with the assembling of higher precision, but still can not avoid the incoming position of illumination light on the plane of incidence of Glass rod or light conductor to have deviation.As the reason of the deviation of incoming position, the assembly precision of each parts or the deviation of machining accuracy such as have the deviation of the installation site between parts, the bias of light-gathering optics or skew.In addition, the deviation etc. as the filament of bulb of light source use or the position of the electric arc of Xe lamp also becomes reason.
In addition, the picture of the electric arc of the filament of bulb or Xe lamp is imaged onto spot position by light-gathering optics, and filament or electric arc have limited size, its brightness irregularities.In addition, light-gathering optics has multiple aberration.Therefore, filament or electric arc are because of the impact of light-gathering optics, and optically focused is not strict point, but presents the light intensity distributions expanded as Gaussian distribution curve.
By using Glass rod, the uniformity of light intensity distributions can be improved, but because the deviation of the incoming position of illumination light or illumination light are not condensed to a little first-class reason, the size of light intensity is different according to each fujinon electronic video endoscope or light supply apparatus.
Fig. 8 represents an example of the intensity distributions in the plane of incidence of Glass rod.This light intensity distributions calculates the illuminator utilizing paraboloidal mirror and collecting lens the illumination light from Xe lamp to be gathered the plane of incidence of Glass rod and tries to achieve.Use general that be used as the light source of fujinon electronic video endoscope, that arc length is 1.2mm light source, as Xe lamp.Homogenization based on the light intensity distributions of Glass rod is illumination light light-intensity averaging making to incide this plane of incidence, such as, when the plane of incidence of the Glass rod that diameter is 2mm is in the scope shown in labelling G1, the light intensity penetrated from the outgoing plane of this Glass rod is higher.But when the plane of incidence is in the scope shown in labelling G2, injection intensity becomes quite little.
Due to the main cause that the performance becoming fujinon electronic video endoscope based on the light intensity deviation of machine error as above reduces, so need to improve it.In addition, the deviation of the caloric value produced with the light loss of the front of insertion section is caused based on the light intensity deviation of machine error.In the equipment that light intensity is larger, the heating quantitative change with light loss is many, so it must be made can not to exceed the ceiling temperature allowed by the front of insertion section.Therefore, in order to tackle the larger equipment of light intensity, need the illuminating lens using light loss less, this is subject to the restriction in the design of lamp optical system.
Summary of the invention
The object of the invention is to, a kind of lighting optical system for endoscope and the illuminator that can reduce the strength difference of the illumination light of each equipment room are provided.
To achieve these goals, in lighting optical system for endoscope of the present invention, between printing opacity rod and light conductor, meet formula
and D>d.Printing opacity rod makes the illumination light from light source portion incide the excellent plane of incidence, guides this illumination light into excellent outgoing plane while internal reflection.Light conductor has the guiding plane of incidence of the circle in the face of excellent outgoing plane, guides the illumination light from printing opacity rod into endoscope distal end portion.The diameter of the rod plane of incidence is d, and the diameter of printing opacity rod is D.The full width half maximum (fullwidthathalf-maximum(FWHM) of the light intensity of the illumination light of the rod plane of incidence) be Fw.Illumination light is A relative to the maximum offset of excellent plane of incidence incoming position diametrically.
Printing opacity rod preferably guides illumination light into excellent outgoing plane while total reflection.The side face of preferred printing opacity rod contacts with air, utilizes the specific refractivity between air, produces total reflection.In addition, preferred excellent outgoing plane is close to guiding the plane of incidence.
In endoscope-use illuminator of the present invention, have and produce the light source of illumination light, the light-gathering optics of aggregated illumination light, printing opacity rod, light conductor and illuminating lens, and meet formula
d>d.Printing opacity rod makes the illumination light from light source portion incide the excellent plane of incidence, guides this illumination light into excellent outgoing plane while internal reflection.Light conductor has the guiding plane of incidence with the circle faced by excellent outgoing plane, guides the illumination light from printing opacity rod into endoscope distal end portion.Illuminating lens is configured in endoscope distal end portion, the illumination light from light conductor is irradiated to look-out station.The diameter guiding the plane of incidence is d, and the diameter of printing opacity rod is D.The full width half maximum of the light intensity of the illumination light of the rod plane of incidence is Fw.Illumination light is A relative to the maximum offset of excellent plane of incidence incoming position diametrically.
Light-gathering optics preferably includes: paraboloidal mirror, makes the illumination light from light source become almost parallel light; And collecting lens, make the illumination light from paraboloidal mirror gather the excellent plane of incidence.Preferred use coupling, printing opacity rod and light conductor, to make the excellent outgoing plane of printing opacity rod and the mode guiding the plane of incidence to be close to, are remained on the state be connected by this coupling.
Preferably in the front end of coupling, transparent glass cover is installed, the excellent plane of incidence of printing opacity rod and being close to of this glass cover below.Preferred light source and light-gathering optics are built in the framework of light supply apparatus, and above-mentioned coupling is inserted in this framework.
Invention effect
According to the present invention, if the diameter of the plane of incidence of light conductor is d, the diameter of printing opacity rod is D, and the full width half maximum of the light intensity of the illumination light in the plane of incidence of printing opacity rod is F, when the maximum offset of the incoming position of illumination light in the radial direction of the plane of incidence of printing opacity rod is A, owing to meeting "
" and " D>d ", so light loss can not be made to become large, and the difference of light intensity between reduction equipment.
Accompanying drawing explanation
Fig. 1 is the skeleton diagram of endoscopic system.
Fig. 2 is the key diagram schematically showing lamp optical system.
Fig. 3 is the key diagram of the incident area representing each fibre bundle guided in the plane of incidence.
Fig. 4 is the sectional view representing the state being connected to light conductor and Glass rod in coupling.
Fig. 5 is the chart of the relation representing the diameter of Glass rod and the degree of deviation of light intensity.
Fig. 6 is the chart representing the diameter of Glass rod and the relation of light quantity.
Fig. 7 is the chart of an example of the distribution representing the light intensity inciding light intensity in Glass rod and injection.
Fig. 8 is the chart of an example of the light intensity distributions represented in the plane of incidence of Glass rod.
Detailed description of the invention
In Fig. 1, endoscopic system 10 comprises fujinon electronic video endoscope 11, blood processor 12 and light supply apparatus 14.Fujinon electronic video endoscope 11 possesses: be inserted in the pliability insertion section 16 in subject; Be located at the operating portion 17 of the base end part of insertion section 16, for the holding of fujinon electronic video endoscope 11 and the operation of insertion section 16; And general flexible cord 18, for operating portion 17 is connected respectively to blood processor 12 and light supply apparatus 14.As everyone knows, the leading section 16a of insertion section 16 in hard cylinder built-in camera chain (photography is optical system, imaging apparatus), illuminating lens 19(with reference to Fig. 2) etc.In addition, in the rear end of leading section 16a, bending bending section 16b is freely provided with.
At operating portion 17, be provided with 2 angulation knobs (angleknob) 22, action button 23, pliers entrance 24.2 angulation knobs 22 are corresponding with above-below direction and left and right directions, bent insertion section 16 to selected direction.When the rotation amount of angulation knob 22 is larger, bending quantitative change is large.Action button 23 is for various operation such as supply gas/send water and attraction etc.Pliers entrance 24 and the pliers channel connection be inserted in insertion section 16.Aquaporin of supplying gas/send, signal cable, light conductor 27(is communicated with reference to Fig. 2 in general flexible cord 18) etc.
Blood processor 12 is electrically connected with fujinon electronic video endoscope 11 and light supply apparatus 14, comprehensively controls the action of electronic endoscope system 10.This blood processor 12, by being inserted into the signal cable in general flexible cord 18 or insertion section 16, controls the driving of the imaging apparatus in the 16a of leading section.The image pickup signal exported from this imaging apparatus is sent to blood processor 12 by signal cable.This blood processor 12 pairs of image pickup signals are sent to monitor 28 after implementing various image procossing, and, at the image of its display surface display look-out station.
Light supply apparatus 14 illumination light that subtend look-out station irradiates under the control of blood processor 12 controls, and in this framework 14a, built-in light source portion 31(is all with reference to Fig. 2) and various circuit etc. for driving light source portion 31/control.
As shown in Figure 2, lamp optical system 30 comprises: the illuminating lens 19 and the light guide unit 32 that are configured at leading section 16a.Light guide unit has: be inserted into the light conductor 27 in insertion section 16, Glass rod 37, glass cover 36.Light source portion 31 comprises: as the Xe lamp 33, paraboloidal mirror 34, collecting lens 35 etc. of light source.In addition, the incident-end 32a of light guide unit 32 is inserted in the framework 14a of light supply apparatus 14.At incident-end 32a, comprise the guiding plane of incidence 27a of glass cover 36, Glass rod 37, light conductor 27 successively from light source portion 31 side.Illuminator comprises: illuminating lens 19, light guide unit 32, light source portion 31 etc.
Illumination light from Xe lamp 33 incides Glass rod 37 via glass cover 36.As everyone knows, Xe lamp 33 carries out electric discharge to release illumination light between electrode.In addition, as light source, be not limited to Xe lamp 33, various lamp or LED etc. can be utilized.In addition, can content etc. according to the observation, suitably determine the kind of light source or the color of illumination light or wavelength.Further, also in order to obtain the illumination light of specific wavelength or wave band, and the optical filters such as band filter can be set.
Paraboloidal mirror 34, by the illumination light of reflection from Xe lamp 33, incides in collecting lens 35 with directional light substantially.Collecting lens 35 is made its optically focused and incides in Glass rod 37 by refracting illumination light.In addition, light source portion 31 such as also can be made up of Xe lamp 33 and concave mirror, utilizes concave mirror to make illumination light optically focused and incidence.
Glass rod 37 is printing opacity rod, is configured between light conductor 27 and light source portion 31, reduces the illumination caused by the deviation of intensity distributions uneven.Via Glass rod 37, illumination light is incident to guiding plane of incidence 27a.Leading section 16a is directed to by this light conductor 27 from the illumination light guiding plane of incidence 27a to incide in light conductor 27.
Light conductor 27 comprises a pair fibre bundle 38.Each fibre bundle 38 is formed by many optical fiber (optical fiber wire rod), is gathered into cylindrical shape in incident-end 32a side.As shown in Figure 3, the incident area 38a of each fibre bundle 38 forms semicircle, and entirety is formed as 1 circular plane of incidence 27a.
Light conductor 27, assembling the inside by general flexible cord 18 and insertion section 16 under the state being 1, branches into 2 according to fibre bundle in the 16a of leading section.Before the guiding outgoing plane 38b being disposed in each fibre bundle 38 in the 16a of leading section, be configured with illuminating lens 19 respectively, from the illumination light of each guiding outgoing plane 38b via each self-corresponding illuminating lens 19, from both sides, look-out station thrown light on.
As shown in Figure 4, with coupling 40, light conductor 27 and Glass rod 37 are linked.Coupling 40 has female component 41 and the male component 42 of general cylindrical shape.In the hollow bulb of female component 41, accommodate glass cover 36 and Glass rod 37, in the hollow bulb of male component 42, remain the end of the plane of incidence 27a side of light conductor 27.
Glass rod 37 as printing opacity rod is that transparent glass is made columniform parts, has circular excellent plane of incidence 37a and excellent outgoing plane 37b at two ends.Plane of incidence 37a and excellent outgoing plane 37b is orthogonal with the axle center of Glass rod 37 for rod.This Glass rod 37 remains on excellent keeper 43, is fixed in the hollow bulb of female component 41 by this excellent keeper 43.
Above-mentioned Glass rod 37 has the function of the uniform intensity distribution making illumination light, and, meet following formula (1), (2) respectively.
D>d……（2）
D in above-mentioned formula (1), (2) is the diameter of Glass rod 37.D is that light conductor 27(guides plane of incidence 27a) diameter.Fw is the full width half maximum of the light intensity of illumination light in excellent plane of incidence 37a, by the light intensity of the illumination light of collecting lens 35 optically focused be become its peak value 1/2 the diameter of light beam of position.A is the incoming position maximum offset diametrically of illumination light on excellent plane of incidence 37a.That is, this maximum offset A is the limits of error determined in design according to incoming position precision, with from the center of excellent plane of incidence 37a to become illumination light light intensity peak value position distance represent.
In this embodiment, if the diameter d of light conductor 27 is 2mm, full width half maximum Fw is 2mm, and maximum offset A is ± 0.5mm, so be set to 3mm by the diameter D Glass rod 37, meets formula (1), (2).
Glass rod 37 makes to incide inner illumination light from excellent plane of incidence 37a and advances to excellent outgoing plane 37b while being reflected by side face, makes the light intensity uniform of the illumination light penetrated from excellent outgoing plane 37b thus.Rod keeper 43 passes through only to contact and keeps the side face at the both ends of Glass rod 37, and the whole side face of the cardinal principle of Glass rod 37 forms air layer.Thus, in Glass rod 37, illumination light is totally reflected, and the decay of the intensity of the illumination light based on reflection is reduced.
Glass rod 37 is longer, makes the effect of uniform intensity distribution better, but becomes many at the order of reflection reaching the illumination light before excellent outgoing plane 37b, and the decay of illumination light becomes large.Therefore, preferably the length of Glass rod 37 is set to about 5 ~ 15 times of diameter.In this embodiment, the length of Glass rod 37 is set to 21mm, is 7 times of diameter.
Glass cover 36 is for preventing Glass rod 37 impaired or prevent from adhering to the component of medicament.Each face of this glass cover 36 is writing board shapes orthogonal with the axle center of Glass rod 37, and this glass cover 36 is fixed on the front of female component 41, after be close to excellent plane of incidence 37a, before expose to light source portion 31 side.
Under the state that light conductor 27 is covered by sheath 44 at side face, its incident-end remains in the hollow bulb of male component 42.The front end face of plane of incidence 27a and male component 42 is guided to become the same face.
Male component 42 forms external screw thread around its leading section, by by this external screw thread and the internal screw-thread screw of hollow bulb inner peripheral surface being formed in female component 41, and links with female component 41.By this link, light conductor 27 and Glass rod 37, consistent and guide plane of incidence 27a to abut and assembled under the state being close to excellent outgoing plane 37b in their axle center.In addition, labelling 46 is the O shape rings for preventing medicinal liquid etc. from entering from the gap between female component 41 and male component 42.
If ignore the loss of the inside of Glass rod 37, the light intensity of the illumination light penetrated from excellent outgoing plane 37b (below, be called rod injection intensity) be the light intensity (hereinafter, referred to excellent incident intensity) of illumination light by inciding excellent plane of incidence 37a average after the intensity that obtains.When making illumination light incide in Glass rod 37, the various main causes such as the deviation of the undeniable arc position due to Xe lamp 33 or the assembly precision in each portion, illumination light offsets relative to the incoming position (hereinafter, referred to excellent incoming position) of excellent plane of incidence 37a.In addition, the illumination light from Xe lamp 33 has in the radial direction of light beam with the light intensity distributions of mountain type expansion.Therefore, when excellent incoming position skew, the incident intensity integrated value of excellent incident intensity after the area integral of excellent plane of incidence 37a is changed, so the increase and decrease of rod injection intensity.
When diameter D becomes large, even if excellent incoming position departs from the radial direction of excellent plane of incidence 37a, the change of incident intensity integrated value also diminishes, and therefore the increase and decrease amount of rod injection intensity also can diminish.As a result, the variation with the light intensity of the illumination light of the deviation of excellent incoming position can reduce.
And when the diameter D of Glass rod 37 becomes particular value, fully large relative to the light intensity distributions of illumination light, so the improvement effect of the deviation of rod injection intensity becomes the state that almost can not get improving, this specific diameter is derived by above-mentioned formula (1).
Fig. 5 illustrates an example of the change of the degree of deviation B of rod injection intensity when increasing the diameter D of Glass rod 37.Same with the present embodiment, represent the maximum offset A of excellent incoming position be 0.5mm, under the full width half maximum Fw of illumination light is the condition of 2mm, the change of the degree of deviation when diameter D of Glass rod 37 increases from the 2mm identical with the diameter d of light conductor 27.Degree of deviation B obtains according to following formula (3).In addition, the maximum rod injection intensity that " L0max ", " L0min " in formula (3) is the diameter of Glass rod 37 respectively when being 2mm and minimum rod injection intensity.In addition, " Lmax ", " Lmin " are maximum rod injection intensity, the minimum rod injection intensity under arbitrary diameter D respectively.When the diameter of Glass rod 37 is 2mm, being " 1.00 " when rod injection intensity (relative light intensity) is minimum, is " 1.96 " time maximum.
B=（Lmax／Lmin）／（L0max／L0min）×100（%）……（3）
On the other hand, setting the diameter d of light conductor 27 to be certain, when the diameter D of Glass rod 37 increases, the area of excellent outgoing plane 37b increases relative to guiding the difference in areas of plane of incidence 27a.Therefore, as shown in Figure 6, along with the increase of diameter D, do not incide the illumination light that guide penetrates face 27a and become many, the light loss of illumination light becomes large.
In addition, in figure 6, the light quantity inciding light conductor 27 when being the 2mm identical with the diameter d of light conductor 27 with the diameter D of Glass rod 37 is the mode of 100%, represents the light quantity inciding light conductor 27 from Glass rod 37.
As implied above, even if the diameter D of Glass rod 37 is set to and is greater than specific diameter, although the light loss of illumination light becomes large, but because the reduction effect of light intensity deviation also can not improve, so by the diameter D of Glass rod 37 is set to specific diameter, when loss not being increased to needs and being above, the maximum effect of the deviation of light intensity can be reduced.On the other hand, in order to reduce the deviation of light intensity, produce many light loss, but by the sensitivity adjustment of imaging apparatus or carry out light quantity adjustment by light source portion 31 and can fully tackle.
In addition, reduced the deviation of light intensity by the Glass rod 37 linked with light conductor 27, therefore, do not need improvement light supply apparatus 14 etc., can be implemented by the improvement of one end of the light conductor 27 of fujinon electronic video endoscope 11 side, so be also favourable structure in the improvement this point of existing device.
Then, the effect of said structure is described.When Xe lamp 33 is by lighting, the illumination light from this Xe lamp 33 incides excellent plane of incidence 37a.The illumination light entering the inside of Glass rod 37 from this excellent plane of incidence 37a is advanced to excellent outgoing plane 37b while repeatedly being carried out being totally reflected by its side face, penetrates from excellent outgoing plane 37b.
Illustrate illumination light light intensity distributions change an example Fig. 7 in, shown in dotted line, the light intensity distributions inciding the illumination light of excellent plane of incidence 37a is uneven diametrically.Therefore, although have the distribution as Gaussian curve, due to as previously mentioned while repeatedly carrying out reflecting by Glass rod 37, thus as shown by the solid line, the uneven of intensity distributions of the illumination light penetrated from excellent outgoing plane 37b improves.
Incide this guiding plane of incidence 27a from the illumination light penetrated with the part guiding plane of incidence 27a to be close to excellent outgoing plane 37b, the illumination light penetrated from other parts can not incide light conductor 27.As mentioned above, light conductor 27 can not be incided from a part of illumination light of Glass rod 37 injection and become loss, but, because this loss is utilized in the reduction effect of the light intensity deviation produced based on Glass rod 37, so wasteness loss can not be become.
Half from excellent outgoing plane 37b incides the illumination light guiding plane of incidence 27a incides an incident area 38a, and remaining half incides another incident area 38a.The illumination light inciding each incident area 38a is directed to leading section 16a respectively by fibre bundle 38, and penetrates from each guiding outgoing plane 27b.
Insertion section 16 is inserted in body, therefore irradiates illumination light by 2 illuminating lenss 19 to look-out station.Imaging apparatus takes the look-out station in this illumination.Image pickup signal from imaging apparatus is sent to blood processor 12, is sent to monitor 28 after carrying out image procossing.Observe the image be shown on this monitor 28, carry out the diagnosis in pathological changes portion.
But because light supply apparatus 14 or fujinon electronic video endoscope 11 have machine error, so according to its assembled state, the incoming position of illumination light changes relative to Glass rod 37, produces difference in the light intensity of the illumination light of irradiating from illuminating lens 19.But, the diameter D of Glass rod 37 meets above-mentioned formula (1), (2), therefore, even if the incoming position of illumination light has deviation relative to Glass rod 37, incide the intensity distributions also general uniform of the illumination light guiding plane of incidence 27a, the deviation with Light intensity is also less.Therefore, according to machine error and their assembled state of light supply apparatus 14 or fujinon electronic video endoscope 11, the light intensity of the illumination light of irradiating from illuminating lens 19 can not produce larger difference.In addition, between each equipment, the light intensity of illumination light does not produce larger difference, so less with the deviation of the caloric value of the light loss in the 16a of leading section yet.
The printing opacity rod of above-mentioned embodiment is with glass manufacture, but also can with plastics manufactures such as allyl resins.In addition, as printing opacity rod, also can be the optical fiber be made up of the core with mutually different refractive indexs and the clad that formed around this core.Now, because the boundary face between core and clad is totally reflected the light incided in core, so do not need to form air layer on the side face of optical fiber.In addition, when employing this optical fiber, the diameter of core being set to " D ", meeting formula (1), (2).
Claims (9)
1. a lighting optical system for endoscope,
Possess:
The printing opacity rod of cylindrical shape, this printing opacity rod makes the illumination light from light source portion incide the excellent plane of incidence, and while internal reflection, guides this illumination light into excellent outgoing plane;
Light conductor, has the guiding plane of incidence with the circle faced by above-mentioned excellent outgoing plane, the above-mentioned illumination light from above-mentioned printing opacity rod is guided to endoscope leading section,
The feature of above-mentioned lighting optical system for endoscope is,
Setting the diameter of the above-mentioned guiding plane of incidence as d, the diameter of above-mentioned printing opacity rod is D, the full width half maximum of the light intensity of above-mentioned illumination light in the above-mentioned excellent plane of incidence is Fw, when illumination light is A relative to the incoming position maximum offset diametrically of the above-mentioned excellent plane of incidence, meets following formula:
D≒Fw+2·A
D>d。
2. lighting optical system for endoscope according to claim 1, is characterized in that,
Above-mentioned printing opacity rod guides above-mentioned illumination light into excellent outgoing plane while total reflection.
3. lighting optical system for endoscope according to claim 2, is characterized in that,
The side face of above-mentioned printing opacity rod contacts with air, utilizes the specific refractivity between air, produces above-mentioned total reflection.
4. the lighting optical system for endoscope according to any one of claims 1 to 3, is characterized in that,
Above-mentioned excellent outgoing plane and the above-mentioned guiding plane of incidence are close to.
5. an endoscope-use illuminator,
Possess:
Light source, produces illumination light;
Light-gathering optics, for assembling above-mentioned illumination light;
The printing opacity rod of cylindrical shape, this printing opacity rod makes the illumination light from above-mentioned light-gathering optics incide the excellent plane of incidence, and while internal reflection, guides this illumination light into excellent outgoing plane;
Light conductor, has the guiding plane of incidence with the circle faced by above-mentioned excellent outgoing plane, the above-mentioned illumination light from above-mentioned printing opacity rod is guided to endoscope leading section; And
Illuminating lens, is disposed in endoscope distal end portion, the illumination light from above-mentioned light conductor is irradiated to look-out station,
The feature of above-mentioned endoscope-use illuminator is,
If the diameter of the above-mentioned guiding plane of incidence is d, the diameter of above-mentioned printing opacity rod is D, the full width half maximum of the light intensity of above-mentioned illumination light on the above-mentioned excellent plane of incidence is Fw, when illumination light is A relative to the incoming position maximum offset diametrically of the above-mentioned excellent plane of incidence, meets following formula:
D≒Fw+2·A
D>d。
6. endoscope-use illuminator according to claim 5, is characterized in that,
Above-mentioned light-gathering optics comprises:
Paraboloidal mirror, makes above-mentioned illumination light become almost parallel light; And
Collecting lens, makes illumination light from this paraboloidal mirror to above-mentioned excellent plane of incidence optically focused.
7. endoscope-use illuminator according to claim 5, is characterized in that,
Possess coupling, the mode that this coupling is close to make above-mentioned excellent outgoing plane and the above-mentioned guiding plane of incidence, above-mentioned printing opacity rod and above-mentioned light conductor are remained on the state be connected.
8. endoscope-use illuminator according to claim 7, is characterized in that,
In the front end of above-mentioned coupling, transparent glass cover is installed, the above-mentioned excellent plane of incidence of above-mentioned printing opacity rod and being close to of this glass cover below.
9. endoscope-use illuminator according to claim 8, is characterized in that,
Above-mentioned light source and above-mentioned light-gathering optics are built in the framework of light supply apparatus, and above-mentioned coupling is inserted in this framework.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011216677A JP5389884B2 (en) | 2011-09-30 | 2011-09-30 | Endoscope illumination optical system and illumination device |
| JP216677/2011 | 2011-09-30 |
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| CN103027655A CN103027655A (en) | 2013-04-10 |
| CN103027655B true CN103027655B (en) | 2015-12-02 |
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| CN201210319118.1A Active CN103027655B (en) | 2011-09-30 | 2012-08-31 | Lighting optical system for endoscope and illuminator |
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| CN105286761A (en) * | 2015-09-29 | 2016-02-03 | 微创（上海）医疗机器人有限公司 | Electronic endoscope |
| CN106510607B (en) * | 2016-12-07 | 2019-10-01 | 上海澳华光电内窥镜有限公司 | A kind of endoscope illumination optical system and fujinon electronic video endoscope |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP5389884B2 (en) | 2014-01-15 |
| CN103027655A (en) | 2013-04-10 |
| JP2013075027A (en) | 2013-04-25 |
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