JPS5758111A - Optical system having focus detector - Google Patents
Optical system having focus detectorInfo
- Publication number
- JPS5758111A JPS5758111A JP13411380A JP13411380A JPS5758111A JP S5758111 A JPS5758111 A JP S5758111A JP 13411380 A JP13411380 A JP 13411380A JP 13411380 A JP13411380 A JP 13411380A JP S5758111 A JPS5758111 A JP S5758111A
- Authority
- JP
- Japan
- Prior art keywords
- optical axis
- glass block
- passes
- optical member
- infocus
- 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
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/28—Systems for automatic generation of focusing signals
- G02B7/30—Systems for automatic generation of focusing signals using parallactic triangle with a base line
- G02B7/32—Systems for automatic generation of focusing signals using parallactic triangle with a base line using active means, e.g. light emitter
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
- Automatic Focus Adjustment (AREA)
Abstract
PURPOSE:To realize compact constitution by arranging an optical member for photoconduction for guiding luminous flux from a light emitting means to an infocus optical member by utilizing total reflection at the image field side of the infocus optical member. CONSTITUTION:A glass block 16 is provided at right angles to an optical axis and on it, half-mirrors 17 and 115 are arranged slanting at a prescribed angle to the optical axis 12. Luminous flux emitted from a light emitting device 18 passes through one terminal surface 19 of the glass block 16 and, after totally reflected by surfaces 110 and 111 where image pickup light perpendicular to the optical axis of the glass block 16 passes, is reflected by a half-mirror 17 arranged at a prescribed angle; and then it passes through a surface 110 at an internal object side of a surface perpendicular to the optical axis of the glass block 16 and further passed through a focusing lens part to be projected upon an object 112.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13411380A JPS5758111A (en) | 1980-09-25 | 1980-09-25 | Optical system having focus detector |
DE19813138066 DE3138066A1 (en) | 1980-09-25 | 1981-09-24 | Optical system having a focus detection device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13411380A JPS5758111A (en) | 1980-09-25 | 1980-09-25 | Optical system having focus detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5758111A true JPS5758111A (en) | 1982-04-07 |
Family
ID=15120757
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13411380A Pending JPS5758111A (en) | 1980-09-25 | 1980-09-25 | Optical system having focus detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5758111A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6455511A (en) * | 1987-08-26 | 1989-03-02 | Canon Kk | Zoom lens |
-
1980
- 1980-09-25 JP JP13411380A patent/JPS5758111A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6455511A (en) * | 1987-08-26 | 1989-03-02 | Canon Kk | Zoom lens |
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