CA987129A - Multi-wavelength photometer employing a rotating variable wavelength filter - Google Patents

Multi-wavelength photometer employing a rotating variable wavelength filter

Info

Publication number: CA987129A
Authority: CA; Canada
Prior art keywords: wavelength; rotating variable; employing; filter; wavelength filter
Prior art date: 1973-01-26
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Expired

Application number

CA188,270A

Other versions

CA188270S (en

Inventor

George W. Lowy

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Baxter International Inc

Original Assignee

Baxter Laboratories Inc

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1973-01-26

Filing date

1973-12-17

Publication date

1976-04-13

1973-12-17 Application filed by Baxter Laboratories Inc filed Critical Baxter Laboratories Inc

1976-04-13 Application granted granted Critical

1976-04-13 Publication of CA987129A publication Critical patent/CA987129A/en

Status Expired legal-status Critical Current

Links

Classifications

- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/314—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths

CA188,270A 1973-01-26 1973-12-17 Multi-wavelength photometer employing a rotating variable wavelength filter Expired CA987129A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US00326495A US3811781A (en)	1973-01-26	1973-01-26	Multi-wavelength photometer employing a rotating variable wavelength filter

Publications (1)

Publication Number	Publication Date
CA987129A true CA987129A (en)	1976-04-13

Family

ID=23272454

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA188,270A Expired CA987129A (en)	1973-01-26	1973-12-17	Multi-wavelength photometer employing a rotating variable wavelength filter

Country Status (9)

Country	Link
US (1)	US3811781A (en)
JP (1)	JPS49111685A (en)
CA (1)	CA987129A (en)
CH (1)	CH579269A5 (en)
DE (1)	DE2401829A1 (en)
FR (1)	FR2215612B1 (en)
GB (1)	GB1447824A (en)
IT (1)	IT1002425B (en)
NL (1)	NL7400847A (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS4984691A (en) *	1972-12-20	1974-08-14
DE2430011C3 (en) *	1974-06-22	1978-05-03	Bayer Ag, 5090 Leverkusen	Two-beam photometer with interference filter
US3967113A (en) *	1974-12-05	1976-06-29	Baxter Laboratories, Inc.	Wavelength-corrected spectrofluorometer
DE2530480A1 (en) *	1975-07-09	1977-01-27	Bayer Ag	SINGLE-BEAM PHOTOMETER
JPS5249873A (en) *	1975-10-17	1977-04-21	Oki Electric Ind Co Ltd	Chromaticity gradient analitical apparatus
US4131888A (en) *	1976-08-18	1978-12-26	American District Telegraph Company	Dual projected-beam smoke detector
US5166755A (en) *	1990-05-23	1992-11-24	Nahum Gat	Spectrometer apparatus
US5959738A (en)	1994-07-25	1999-09-28	Molecular Devices Corporation	Determination of light absorption pathlength in a vertical-beam photometer
US5519219A (en) *	1994-09-08	1996-05-21	Janos Technology Inc.	Portable filter infrared spectrometer
GB9704972D0 (en) *	1997-03-11	1997-04-30	Howard Foundation	Flicker photometer
US6496260B1 (en) *	1998-12-23	2002-12-17	Molecular Devices Corp.	Vertical-beam photometer for determination of light absorption pathlength
DE102008019500B4 (en)	2007-09-20	2010-06-02	Technische Universität München	Anorndnung, method and sensor for detecting liquid parameters

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR1338403A (en) *	1962-07-10	1963-09-27	Commissariat Energie Atomique	Spectrophotometric method and device comprising application
GB1077501A (en) *	1964-02-04	1967-08-02	Nat Res Dev	Scanning spectrophotometer
US3449050A (en) *	1965-04-29	1969-06-10	Beckman Instruments Inc	Spectrophotometer
DE1939034C2 (en) *	1969-07-31	1971-01-28	Bio Cal Instr Gmbh	Photometer for making measurements at different wavelengths
FR2070481A5 (en) *	1969-12-05	1971-09-10	Commissariat Energie Atomique

1973
- 1973-01-26 US US00326495A patent/US3811781A/en not_active Expired - Lifetime
- 1973-12-17 CA CA188,270A patent/CA987129A/en not_active Expired
- 1973-12-28 IT IT32391/73A patent/IT1002425B/en active
1974
- 1974-01-04 GB GB34574A patent/GB1447824A/en not_active Expired
- 1974-01-10 JP JP49006319A patent/JPS49111685A/ja active Pending
- 1974-01-16 DE DE2401829A patent/DE2401829A1/en active Pending
- 1974-01-16 FR FR7401392A patent/FR2215612B1/fr not_active Expired
- 1974-01-18 CH CH72274A patent/CH579269A5/xx not_active IP Right Cessation
- 1974-01-22 NL NL7400847A patent/NL7400847A/xx not_active Application Discontinuation

Also Published As

Publication number	Publication date
FR2215612A1 (en)	1974-08-23
IT1002425B (en)	1976-05-20
CH579269A5 (en)	1976-08-31
DE2401829A1 (en)	1974-08-01
JPS49111685A (en)	1974-10-24
GB1447824A (en)	1976-09-02
NL7400847A (en)	1974-07-30
US3811781A (en)	1974-05-21
FR2215612B1 (en)	1977-08-26

Publication	Publication Date	Title
CA999500A (en)	1976-11-09	Programmed filter
CA1011823A (en)	1977-06-07	Digital filter
CA1012232A (en)	1977-06-14	Acousto-optic filter
CA999348A (en)	1976-11-02	Filter networks
CA987129A (en)	1976-04-13	Multi-wavelength photometer employing a rotating variable wavelength filter
AU470870B2 (en)	1976-04-01	Filters employing elements with distributed constants
CA1016639A (en)	1977-08-30	Tunable infrared/ultraviolet laser
CA1028253A (en)	1978-03-21	Filtration
CA1029446A (en)	1978-04-11	Dielectric waveguide filters
CA1002344A (en)	1976-12-28	Photometer using three kinds of light wavelengths
AU473816B2 (en)	1976-07-01	Pleated filter member
CA1000589A (en)	1976-11-30	Filter changing valve unit
CA1016872A (en)	1977-09-06	Filters
CA1016473A (en)	1977-08-30	Disk filters
CA1034644A (en)	1978-07-11	Notch rejection filter
AU474058B2 (en)	1976-07-15	Filter
CA1005724A (en)	1977-02-22	Filters
CA1024457A (en)	1978-01-17	Cartridge filter element
CA993375A (en)	1976-07-20	Filter media
CA1015579A (en)	1977-08-16	Light spectrum measurement with indexed filter
CA995592A (en)	1976-08-24	Filter
AU492267B1 (en)	1976-05-13	Diffraction grating
AU491418B2 (en)	1976-02-19	Light-transmitting, thermal-radiation reflecting filter
CA1007178A (en)	1977-03-22	Filters
AU7525374A (en)	1976-05-13	Diffraction grating