DE196170C - - Google Patents
Info
- Publication number
- DE196170C DE196170C DE1906196170D DE196170DD DE196170C DE 196170 C DE196170 C DE 196170C DE 1906196170 D DE1906196170 D DE 1906196170D DE 196170D D DE196170D D DE 196170DD DE 196170 C DE196170 C DE 196170C
- Authority
- DE
- Germany
- Prior art keywords
- cell
- selenium
- light sources
- frosted glass
- selenium 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
- 239000011669 selenium Substances 0.000 claims description 24
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 claims description 19
- 229910052711 selenium Inorganic materials 0.000 claims description 19
- 239000005338 frosted glass Substances 0.000 claims description 9
- 238000005259 measurement Methods 0.000 claims description 3
- 239000011521 glass Substances 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 239000011505 plaster Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000005337 ground glass Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
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)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE191075T | 1906-04-20 | ||
| DE196170T | 1906-08-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE196170C true DE196170C (enrdf_load_stackoverflow) | 1908-03-09 |
Family
ID=34634919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1906196170D Expired DE196170C (enrdf_load_stackoverflow) | 1906-04-20 | 1906-08-16 |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE196170C (enrdf_load_stackoverflow) |
-
1906
- 1906-08-16 DE DE1906196170D patent/DE196170C/de not_active Expired
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