DE225371C - - Google Patents
Info
- Publication number
- DE225371C DE225371C DENDAT225371D DE225371DA DE225371C DE 225371 C DE225371 C DE 225371C DE NDAT225371 D DENDAT225371 D DE NDAT225371D DE 225371D A DE225371D A DE 225371DA DE 225371 C DE225371 C DE 225371C
- Authority
- DE
- Germany
- Prior art keywords
- light
- selenium cell
- grid
- selenium
- resistance
- 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.)
- Active
Links
- 229910052711 selenium Inorganic materials 0.000 claims description 54
- 239000011669 selenium Substances 0.000 claims description 54
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 claims description 52
- 238000004804 winding Methods 0.000 claims description 8
- 230000005284 excitation Effects 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 17
- 230000005540 biological transmission Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 230000035699 permeability Effects 0.000 description 6
- 230000009467 reduction Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 230000005389 magnetism Effects 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 125000003748 selenium group Chemical class *[Se]* 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2053—Intensity control of illuminating light
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE225371C true DE225371C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
Family
ID=486022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT225371D Active DE225371C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE225371C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
-
0
- DE DENDAT225371D patent/DE225371C/de active Active
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