FR954886A - - Google Patents
Info
- Publication number
- FR954886A FR954886A FR954886DA FR954886A FR 954886 A FR954886 A FR 954886A FR 954886D A FR954886D A FR 954886DA FR 954886 A FR954886 A FR 954886A
- Authority
- FR
- France
- 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
- G01J1/12—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void using wholly visual means
- G01J1/122—Visual exposure meters for determining the exposure time in photographical recording or reproducing
- G01J1/124—Visual exposure meters for determining the exposure time in photographical recording or reproducing based on the comparison of the intensity of measured light with a comparison source or comparison illuminated surface
- G01J1/126—Visual exposure meters for determining the exposure time in photographical recording or reproducing based on the comparison of the intensity of measured light with a comparison source or comparison illuminated surface for enlarging apparatus
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR954886A true FR954886A (pt) | 1950-01-06 |
Family
ID=1557715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR954886D Expired FR954886A (pt) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR954886A (pt) |
-
0
- FR FR954886D patent/FR954886A/fr not_active Expired