FR895873A - Photoelectric light meter suitable for enlargers - Google Patents
Photoelectric light meter suitable for enlargersInfo
- Publication number
- FR895873A FR895873A FR895873DA FR895873A FR 895873 A FR895873 A FR 895873A FR 895873D A FR895873D A FR 895873DA FR 895873 A FR895873 A FR 895873A
- Authority
- FR
- France
- Prior art keywords
- enlargers
- light meter
- photoelectric light
- meter suitable
- photoelectric
- 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
- G01J1/4219—Photoelectric exposure meters for determining the exposure time in recording or reproducing specially adapted for enlargers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE895873X | 1942-07-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR895873A true FR895873A (en) | 1945-02-06 |
Family
ID=6847928
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR895873D Expired FR895873A (en) | 1942-07-23 | 1943-06-25 | Photoelectric light meter suitable for enlargers |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR895873A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4738940A (en) * | 1984-03-30 | 1988-04-19 | Institut Francais Du Petrole | Novel hydrocracking or cracking catalyst for hydrocarbon charges |
-
1943
- 1943-06-25 FR FR895873D patent/FR895873A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4738940A (en) * | 1984-03-30 | 1988-04-19 | Institut Francais Du Petrole | Novel hydrocracking or cracking catalyst for hydrocarbon charges |
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