FR864677A - Photomètre - Google Patents
PhotomètreInfo
- Publication number
- FR864677A FR864677A FR864677DA FR864677A FR 864677 A FR864677 A FR 864677A FR 864677D A FR864677D A FR 864677DA FR 864677 A FR864677 A FR 864677A
- Authority
- FR
- France
- Prior art keywords
- photometer
- 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
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
- G01J1/4209—Photoelectric exposure meters for determining the exposure time in recording or reproducing
- G01J1/4214—Photoelectric exposure meters for determining the exposure time in recording or reproducing specially adapted for view-taking apparatus
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US864677XA | 1939-06-09 | 1939-06-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR864677A true FR864677A (fr) | 1941-05-02 |
Family
ID=22198758
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR864677D Expired FR864677A (fr) | 1939-06-09 | 1940-04-06 | Photomètre |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR864677A (fr) |
-
1940
- 1940-04-06 FR FR864677D patent/FR864677A/fr not_active Expired
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