JPS5515139A - Photometric device of camera - Google Patents
Photometric device of cameraInfo
- Publication number
- JPS5515139A JPS5515139A JP8749878A JP8749878A JPS5515139A JP S5515139 A JPS5515139 A JP S5515139A JP 8749878 A JP8749878 A JP 8749878A JP 8749878 A JP8749878 A JP 8749878A JP S5515139 A JPS5515139 A JP S5515139A
- Authority
- JP
- Japan
- Prior art keywords
- elements
- face
- rear end
- luminance side
- light
- 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
Landscapes
- Exposure Control For Cameras (AREA)
Abstract
PURPOSE: To reduce the quantity of incident light and obtain the photometric device which is capabel of covering a wide range with less number of elements by disposing the high luminance side of composite elements to the outside of the rear end face of the pentagonal prism of a single-lens reflex camera and disposing only the low luminance side within the rear end face.
CONSTITUTION: Composite elements are provided to two hypotenuses respectively out of the rear ends of the pentagonal prism PP of a single-lens reflex camera and the high luminance side elements CdS2 of the respective composite elements are so disposed as to cross the hypotenuses. This turns out that the light of quantity smaller than that of the low luminance portions placed within the rear end face is applied to part of the high luminance side elements CdS2 placed in the outside of the rear end face of the pentagonal prism PP and that reaching a saturated state, i.e., maximum conduction state of the photoconductive elements becomes difficult by as much as the reduced component of the quantity of light. In this way, such a photometric device as the one capable of covering a wide light quantity range may be obtained with less number of elements.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8749878A JPS5515139A (en) | 1978-07-18 | 1978-07-18 | Photometric device of camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8749878A JPS5515139A (en) | 1978-07-18 | 1978-07-18 | Photometric device of camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5515139A true JPS5515139A (en) | 1980-02-02 |
Family
ID=13916628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8749878A Pending JPS5515139A (en) | 1978-07-18 | 1978-07-18 | Photometric device of camera |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5515139A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61139158A (en) * | 1984-12-11 | 1986-06-26 | Konishiroku Photo Ind Co Ltd | Image reading method |
| JPS61245669A (en) * | 1985-04-23 | 1986-10-31 | Konishiroku Photo Ind Co Ltd | Image reader |
| JPS6320959A (en) * | 1986-07-15 | 1988-01-28 | Fuji Photo Film Co Ltd | Radiation image information reader |
| JPH01106666A (en) * | 1987-10-20 | 1989-04-24 | Fuji Photo Film Co Ltd | Method for reading picture information |
| JPH0774887A (en) * | 1994-07-08 | 1995-03-17 | Konica Corp | Radiation image reader |
-
1978
- 1978-07-18 JP JP8749878A patent/JPS5515139A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61139158A (en) * | 1984-12-11 | 1986-06-26 | Konishiroku Photo Ind Co Ltd | Image reading method |
| JPS61245669A (en) * | 1985-04-23 | 1986-10-31 | Konishiroku Photo Ind Co Ltd | Image reader |
| JPS6320959A (en) * | 1986-07-15 | 1988-01-28 | Fuji Photo Film Co Ltd | Radiation image information reader |
| JPH01106666A (en) * | 1987-10-20 | 1989-04-24 | Fuji Photo Film Co Ltd | Method for reading picture information |
| JPH0774887A (en) * | 1994-07-08 | 1995-03-17 | Konica Corp | Radiation image reader |
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