JPS5546729A - Finder optical system - Google Patents
Finder optical systemInfo
- Publication number
- JPS5546729A JPS5546729A JP11972278A JP11972278A JPS5546729A JP S5546729 A JPS5546729 A JP S5546729A JP 11972278 A JP11972278 A JP 11972278A JP 11972278 A JP11972278 A JP 11972278A JP S5546729 A JPS5546729 A JP S5546729A
- Authority
- JP
- Japan
- Prior art keywords
- luminous flux
- photographing
- reflecting
- optical path
- way
- 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 provide the device which is compact but causes less decrease in the accuracy of distance measurement by inclining a photo splitting means by 30W50° with respect to the perpendicular line and making this inclined finder luminous flux nearly parallel to the photographing luminous flux by the erecting reflecting system having odd number reflecting surfaces.
CONSTITUTION: The subject light passed through a zoom system 1 is bisected to photographing luminous flux and finder luminous flux by way of a half prism 2 which is inclined 30W50° with respect to the perpendicular line. The photographing luminous flux forms the subject image on a solid-state image sensing element 4 by way of a master system 3. On the other hand, the finder luminous flux is inclined by the half prism 2 and is changed of its optical path about 90° in the upward direction by a prism 10 having a perpendicular reflecting surface. This optical path is converted nearly parallel to the photographing optical path by way of an objective lens 5, a reflecting mirror 11 having parallel reflecting surface, and a reflecting mirror 6 inclined by 45° and forms the subject image on a focus glass 7. This image is observed by an eyepiece lens 9.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11972278A JPS5546729A (en) | 1978-09-28 | 1978-09-28 | Finder optical system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11972278A JPS5546729A (en) | 1978-09-28 | 1978-09-28 | Finder optical system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5546729A true JPS5546729A (en) | 1980-04-02 |
Family
ID=14768493
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11972278A Pending JPS5546729A (en) | 1978-09-28 | 1978-09-28 | Finder optical system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5546729A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61171942U (en) * | 1985-04-11 | 1986-10-25 | ||
FR2637385A1 (en) * | 1988-10-04 | 1990-04-06 | Asahi Optical Co Ltd | STILL IMAGE PHOTO-ELECTRONIC CAMERA |
FR2638540A1 (en) * | 1988-10-04 | 1990-05-04 | Asahi Optical Co Ltd | Camera with zoom lens |
-
1978
- 1978-09-28 JP JP11972278A patent/JPS5546729A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61171942U (en) * | 1985-04-11 | 1986-10-25 | ||
FR2637385A1 (en) * | 1988-10-04 | 1990-04-06 | Asahi Optical Co Ltd | STILL IMAGE PHOTO-ELECTRONIC CAMERA |
FR2638540A1 (en) * | 1988-10-04 | 1990-05-04 | Asahi Optical Co Ltd | Camera with zoom lens |
US5298931A (en) * | 1988-10-04 | 1994-03-29 | Asahi Kogaku Kogyo Kabushiki Kaisha | Electronic still camera |
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