GB766789A - Improvements in and relating to optical and like systems - Google Patents
Improvements in and relating to optical and like systemsInfo
- Publication number
- GB766789A GB766789A GB121253A GB121253A GB766789A GB 766789 A GB766789 A GB 766789A GB 121253 A GB121253 A GB 121253A GB 121253 A GB121253 A GB 121253A GB 766789 A GB766789 A GB 766789A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reversed
- source
- radiation
- reflecting
- jan
- 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
- 230000003287 optical effect Effects 0.000 title 1
- 230000005855 radiation Effects 0.000 abstract 3
- XCAUINMIESBTBL-UHFFFAOYSA-N lead(ii) sulfide Chemical compound [Pb]=S XCAUINMIESBTBL-UHFFFAOYSA-N 0.000 abstract 1
- 238000005498 polishing Methods 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
- G01J1/34—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 separate light paths used alternately or sequentially, e.g. flicker
- G01J1/36—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 separate light paths used alternately or sequentially, e.g. flicker using electric radiation detectors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Radiation Pyrometers (AREA)
- Optical Measuring Cells (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
766,789. Photo-electric pyrometer. CAMBRIDGE INSTRUMENT CO., Ltd., and CLARKE, R. H. Jan. 15, 1954 [Jan. 15, 1953], 1212/53. Class 40 (3). [Also in Group XX] A rotatable reflecting device is provided with a series of alternately reversed reflecting surfaces each of which reflect or deflect radiation from one source only and has a uniform cross-section. Preferably, radiation is deflected into a single common path so that the intensities of two sources 10 and 15 can be compared. As shown, an infra-red radiation pyrometer comprises a calibrated source 10, reflecting device 13, diaphragm 11, stop device 12, lead sulphide photoconductive cell 14 and diaphragm 17 and lens system 16 for unknown source 15. The reflecting surfaces are worked, plated and polished as a single continuous conical surface, on a divided member which is then bolted to a bush 23 with one half reversed as shown. The intensities due to the sources are equal when the alternating component of the cell output is at a minimum and it is necessary to minimize any alternation in the cell output due to the reflecting device either, during the period of reflection from one surface or the other or, during the change-over from one surface to the other. The disc is formed so that when one half is reversed it is still dynamically balanced and it can be reassembled in its original form for re-polishing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB121253A GB766789A (en) | 1953-01-15 | 1953-01-15 | Improvements in and relating to optical and like systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB121253A GB766789A (en) | 1953-01-15 | 1953-01-15 | Improvements in and relating to optical and like systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB766789A true GB766789A (en) | 1957-01-23 |
Family
ID=9718092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB121253A Expired GB766789A (en) | 1953-01-15 | 1953-01-15 | Improvements in and relating to optical and like systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB766789A (en) |
-
1953
- 1953-01-15 GB GB121253A patent/GB766789A/en not_active Expired
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