FR647440A - Photomètre à cellule photoélectrique - Google Patents
Photomètre à cellule photoélectriqueInfo
- Publication number
- FR647440A FR647440A FR647440DA FR647440A FR 647440 A FR647440 A FR 647440A FR 647440D A FR647440D A FR 647440DA FR 647440 A FR647440 A FR 647440A
- Authority
- FR
- France
- Prior art keywords
- photoelectric cell
- cell photometer
- photometer
- photoelectric
- cell
- 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
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)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US647440XA | 1927-01-20 | 1927-01-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR647440A true FR647440A (fr) | 1928-11-23 |
Family
ID=22058004
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR647440D Expired FR647440A (fr) | 1927-01-20 | 1928-01-18 | Photomètre à cellule photoélectrique |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR647440A (fr) |
-
1928
- 1928-01-18 FR FR647440D patent/FR647440A/fr not_active Expired
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