JPS552232A - Focusing optical device for camera - Google Patents
Focusing optical device for cameraInfo
- Publication number
- JPS552232A JPS552232A JP7409078A JP7409078A JPS552232A JP S552232 A JPS552232 A JP S552232A JP 7409078 A JP7409078 A JP 7409078A JP 7409078 A JP7409078 A JP 7409078A JP S552232 A JPS552232 A JP S552232A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- holding member
- distance measuring
- focal plane
- subject
- 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 make production and constitution simple and make possible installation of a distance measuring photo detector in arbitrary positions by contacting the incident end of an optical fiber to the focus glass face on which the subject is imaged to receive a part of the subject image and directing its exit end to the distance measuring photo detector.
CONSTITUTION: The focus glass 15 of a single-lens reflex camera is provided with ground glass form focal plane 15a and Fresnel lens face 15b, and the subject image is formed on the focal place 15a. There is generally a sufficient clearance between the focus glass 15 and condenser lens 16. By making use of this clearance, the arbitrary portion of the subject image formed on the focal plane 15a is directed from the Fresnel lens face 15b side to a distance measuring photo detector 20 through a photo detecting part 18 and optical fiber 19. The photo detecting part 18 measures the distance by slidably providing a holding member 21 having an annular frame on the Fresnel lens face 15b, holding the optical fiber 19 with said holding member 21 in such a manner that its incident part positions within the annular frame and entering the arbitrary portion of the subject imaged on the focal plane 15a into the optical fiber 19 with the reflecting mirror 22 through movement of the holding member 21.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7409078A JPS552232A (en) | 1978-06-21 | 1978-06-21 | Focusing optical device for camera |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7409078A JPS552232A (en) | 1978-06-21 | 1978-06-21 | Focusing optical device for camera |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS552232A true JPS552232A (en) | 1980-01-09 |
Family
ID=13537124
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7409078A Pending JPS552232A (en) | 1978-06-21 | 1978-06-21 | Focusing optical device for camera |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS552232A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63110658A (en) * | 1986-10-27 | 1988-05-16 | Nec Kansai Ltd | Manufacture of semiconductor device |
-
1978
- 1978-06-21 JP JP7409078A patent/JPS552232A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63110658A (en) * | 1986-10-27 | 1988-05-16 | Nec Kansai Ltd | Manufacture of semiconductor device |
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