GB1305911A - - Google Patents
Info
- Publication number
- GB1305911A GB1305911A GB5099569A GB1305911DA GB1305911A GB 1305911 A GB1305911 A GB 1305911A GB 5099569 A GB5099569 A GB 5099569A GB 1305911D A GB1305911D A GB 1305911DA GB 1305911 A GB1305911 A GB 1305911A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rack
- members
- attenuation
- pinion
- balance conditions
- Prior art date
- 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
Links
- 210000001520 comb Anatomy 0.000 abstract 1
- 230000005855 radiation Effects 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/10—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void
- G01J1/20—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle
- G01J1/22—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using a variable element in the light-path, e.g. filter, polarising means
- G01J1/24—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using a variable element in the light-path, e.g. filter, polarising means using electric radiation detectors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Spectrometry And Color Measurement (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
1305911 Radiation attenuation combs BECKMAN INSTRUMENTS Ltd 18 Sept 1970 [17 Oct 1969] 50995/69 Heading G2J An attenuation for use in spectrophometer comprises two apertured members 10, 11 which are mutually aligned and jointly movable by a rack and pinion and which are separately movable to vary the attenuation to provide for scale expansion when a comparator 36 indicates balance conditions between beams of light passing through the members 10, 11 and a sample cell 31. The rack and pinion normally moves both members 10, 11 and a solenoid is operated at balance conditions, to disengage one member from the other so that the rack and pinion drives only one member.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5099569 | 1969-10-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1305911A true GB1305911A (en) | 1973-02-07 |
Family
ID=10458232
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5099569A Expired GB1305911A (en) | 1969-10-17 | 1969-10-17 |
Country Status (3)
Country | Link |
---|---|
US (1) | US3685885A (en) |
DE (1) | DE2050963A1 (en) |
GB (1) | GB1305911A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1414311A (en) * | 1972-07-12 | 1975-11-19 | Pye Ltd | Sepctrophotometers |
US3999863A (en) * | 1975-08-13 | 1976-12-28 | Rohr Industries, Inc. | Apparatus for measuring light absorption |
JPS58120202A (en) * | 1982-01-09 | 1983-07-18 | Takashi Mori | Optical switch device |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1849607A (en) * | 1929-04-11 | 1932-03-15 | Bernheim Georges | Apparatus for the comparison and measurement of luminosity |
US2896508A (en) * | 1953-05-21 | 1959-07-28 | Agfa Ag | Diaphragm suitable for photometers |
-
1969
- 1969-10-17 GB GB5099569A patent/GB1305911A/en not_active Expired
-
1970
- 1970-10-02 US US77666A patent/US3685885A/en not_active Expired - Lifetime
- 1970-10-16 DE DE19702050963 patent/DE2050963A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
DE2050963A1 (en) | 1971-07-01 |
US3685885A (en) | 1972-08-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PLNP | Patent lapsed through nonpayment of renewal fees |