FR624463A - Dispositif de luxmètre - Google Patents
Dispositif de luxmètreInfo
- Publication number
- FR624463A FR624463A FR624463DA FR624463A FR 624463 A FR624463 A FR 624463A FR 624463D A FR624463D A FR 624463DA FR 624463 A FR624463 A FR 624463A
- Authority
- FR
- France
- Prior art keywords
- luxmeter
- luxmeter device
- 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
- G01J1/22—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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR624463T | 1926-11-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR624463A true FR624463A (fr) | 1927-07-19 |
Family
ID=8987110
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR624463D Expired FR624463A (fr) | 1926-11-12 | 1926-11-12 | Dispositif de luxmètre |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR624463A (fr) |
-
1926
- 1926-11-12 FR FR624463D patent/FR624463A/fr not_active Expired
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