SU124796A3 - Device for measuring luminous flux - Google Patents
Device for measuring luminous fluxInfo
- Publication number
- SU124796A3 SU124796A3 SU623257A SU623257A SU124796A3 SU 124796 A3 SU124796 A3 SU 124796A3 SU 623257 A SU623257 A SU 623257A SU 623257 A SU623257 A SU 623257A SU 124796 A3 SU124796 A3 SU 124796A3
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- luminous flux
- measuring luminous
- photocells
- measuring
- photocell
- Prior art date
Links
Landscapes
- Exposure Control For Cameras (AREA)
- Shutters For Cameras (AREA)
Description
Известные устройства дл измерени светового потока, прошедшего через объектив, и управлени временем экспозиции в фотокамере, содержашие фотоэлемент, не позвол ют учитывать измен юшиес услови освещенности.The known devices for measuring the luminous flux transmitted through the lens and controlling the exposure time in a camera containing a photocell do not allow to take into account changing illumination conditions.
Предлагаемое устройство более совершенно по сравнению с известными устройствами, так как свободно от указанного недостатка. Это достигаетс тем, что устройство содержит один или несколько фотоэлементов , укрепленных на лепестках затвора.The proposed device is more perfect in comparison with the known devices, as it is free from the indicated disadvantage. This is achieved in that the device contains one or more photocells mounted on the petals of the shutter.
Фотоэлементу, который располагаетс позади оптики, придаютс такие форма и размеры, чтобы он подвергалс воздействию всего светового потока, вызывающего получение фотоснимка. При этих услови х он будет иметь те же самые геометрические и оптические услови освещени и автоматически освещатьс в течение времени, равного времени экспозиции фотопленки, т. е. показани экспанометра будут всегда соответствовать имеющимс в действительности услови м съемки.The photocell, which is located behind the optics, is shaped and dimensioned so that it is exposed to the entire luminous flux causing the taking of the photograph. Under these conditions, it will have the same geometrical and optical conditions of illumination and automatically illuminate for a time equal to the exposure time of the film, i.e., the expanter readings will always correspond to the actual conditions of the survey.
Предмет изобретени Subject invention
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU623257A SU124796A3 (en) | 1959-03-26 | 1959-03-26 | Device for measuring luminous flux |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU623257A SU124796A3 (en) | 1959-03-26 | 1959-03-26 | Device for measuring luminous flux |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU124796A3 true SU124796A3 (en) | 1959-11-30 |
Family
ID=48407140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU623257A SU124796A3 (en) | 1959-03-26 | 1959-03-26 | Device for measuring luminous flux |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU124796A3 (en) |
-
1959
- 1959-03-26 SU SU623257A patent/SU124796A3/en active
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