JPS6280511A - Optical system for range finding - Google Patents
Optical system for range findingInfo
- Publication number
- JPS6280511A JPS6280511A JP22046785A JP22046785A JPS6280511A JP S6280511 A JPS6280511 A JP S6280511A JP 22046785 A JP22046785 A JP 22046785A JP 22046785 A JP22046785 A JP 22046785A JP S6280511 A JPS6280511 A JP S6280511A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- projection
- optical
- spot
- sensor
- 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
- 230000003287 optical Effects 0.000 title abstract 5
Abstract
PURPOSE: To simplify the constitution of an optical system by projecting spot light from a position at specific distance laterally from the optical axis of a photographic lens and photodetecting reflected light from an object through the photographic lens.
CONSTITUTION: The projection optical system composed of a projection lens 11, etc., projects spot light from the position at distance laterally from the optical axis of photography and the direction of the projection is changed associatively with the forward/backward movement of the photographic lens 16. A two-division photodetector 15 consists of photodetecting element A and B and is arranged on a surface substantially equivalent to the image pickup surface of the lens 16. Consequently, the projection spot from the lens 11 is reflected by the object and incident on the lens 16. This incident light forms a photodetection spot image P on the sensor 15 through a mirror 18, etc. Then, the outputs of the elements A and B, etc., of the sensor 15 are compared with each other by an arithmetic circuit 50; when there is an output difference, the lens 16 is moved and put in focus and the projection system is associated 22 and 24 to move the spot light reflected by the object on the surface of the sensor 15 so that the outputs of the elements A and B coincide with each other. When both outputs coincide with each other, an in-focus state is decided.
COPYRIGHT: (C)1987,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22046785A JPS6280511A (en) | 1985-10-04 | 1985-10-04 | Optical system for range finding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22046785A JPS6280511A (en) | 1985-10-04 | 1985-10-04 | Optical system for range finding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6280511A true JPS6280511A (en) | 1987-04-14 |
Family
ID=16751572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22046785A Pending JPS6280511A (en) | 1985-10-04 | 1985-10-04 | Optical system for range finding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6280511A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013136825A1 (en) * | 2012-03-15 | 2013-09-19 | オムロン株式会社 | Reflective light sensor |
-
1985
- 1985-10-04 JP JP22046785A patent/JPS6280511A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013136825A1 (en) * | 2012-03-15 | 2013-09-19 | オムロン株式会社 | Reflective light sensor |
| JP2013195079A (en) * | 2012-03-15 | 2013-09-30 | Omron Corp | Reflective optical sensor |
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