JPS6480934A - Automatic controller for light quantity of television camera - Google Patents
Automatic controller for light quantity of television cameraInfo
- Publication number
- JPS6480934A JPS6480934A JP62239378A JP23937887A JPS6480934A JP S6480934 A JPS6480934 A JP S6480934A JP 62239378 A JP62239378 A JP 62239378A JP 23937887 A JP23937887 A JP 23937887A JP S6480934 A JPS6480934 A JP S6480934A
- Authority
- JP
- Japan
- Prior art keywords
- ultraviolet
- ray
- varies
- video signal
- photochromic glass
- 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.)
- Pending
Links
Abstract
PURPOSE:To control the quantity of light incident on a photoelectric conversion part automatically with high accuracy by varying the density of a transmission part which varies in density by sensing an ultraviolet ray corresponding to the level of a video signal. CONSTITUTION:This controller is equipped with an ultraviolet-ray lamp 7 which varies in brightness corresponding to the video signal led out of part of a video signal amplifying circuit 3 and the transmission member (photochromic glass) 9 which varies in transmitted light quantity with the ultraviolet ray from the ultraviolet-ray lamp 7. The ultraviolet ray from the ultraviolet-ray lamp 7 is reflected by a filter or prism 8 which reflects ultraviolet rays and transmits visible light to illuminate the photochromic glass 9. Consequently, the quantity of light incident on the photoelectric conversion part 2 is controlled by the photochromic glass 9 corresponding to the brightness of an object field.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62239378A JPS6480934A (en) | 1987-09-24 | 1987-09-24 | Automatic controller for light quantity of television camera |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62239378A JPS6480934A (en) | 1987-09-24 | 1987-09-24 | Automatic controller for light quantity of television camera |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6480934A true JPS6480934A (en) | 1989-03-27 |
Family
ID=17043888
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62239378A Pending JPS6480934A (en) | 1987-09-24 | 1987-09-24 | Automatic controller for light quantity of television camera |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6480934A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5603777A (en) * | 1994-06-27 | 1997-02-18 | Dainippon Screen Mfg. Co., Ltd. | Substrate surface treating apparatus and substrate surface treating method |
WO2005024508A1 (en) * | 2003-09-01 | 2005-03-17 | Murakami Corporation | Plural visual field photographing optical path bending unit, plural visual field photographing device, three-visual-filed photographing optical path bending unit, and three-visual-field photographing device |
-
1987
- 1987-09-24 JP JP62239378A patent/JPS6480934A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5603777A (en) * | 1994-06-27 | 1997-02-18 | Dainippon Screen Mfg. Co., Ltd. | Substrate surface treating apparatus and substrate surface treating method |
WO2005024508A1 (en) * | 2003-09-01 | 2005-03-17 | Murakami Corporation | Plural visual field photographing optical path bending unit, plural visual field photographing device, three-visual-filed photographing optical path bending unit, and three-visual-field photographing device |
JPWO2005024508A1 (en) * | 2003-09-01 | 2006-11-02 | 株式会社村上開明堂 | Multi-field photographing optical path folding device, multi-field photographing device, three-field photographing optical path folding device and three-field photographing device |
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