JPS5425849A - Focus detector - Google Patents
Focus detectorInfo
- Publication number
- JPS5425849A JPS5425849A JP9118177A JP9118177A JPS5425849A JP S5425849 A JPS5425849 A JP S5425849A JP 9118177 A JP9118177 A JP 9118177A JP 9118177 A JP9118177 A JP 9118177A JP S5425849 A JPS5425849 A JP S5425849A
- Authority
- JP
- Japan
- Prior art keywords
- vertical angle
- focus detector
- eherein
- eyepiece
- grating
- 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 detect focus with good accuracy even if the subject is a continuous pattern or grating by providing a single conical prism having a vertical angle of the range eherein no full reflection occurs between an objective lens and an eyepiece in such a manner that the vertical angle thereof positions on the optical axis.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9118177A JPS5425849A (en) | 1977-07-29 | 1977-07-29 | Focus detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9118177A JPS5425849A (en) | 1977-07-29 | 1977-07-29 | Focus detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5425849A true JPS5425849A (en) | 1979-02-27 |
Family
ID=14019274
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9118177A Pending JPS5425849A (en) | 1977-07-29 | 1977-07-29 | Focus detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5425849A (en) |
-
1977
- 1977-07-29 JP JP9118177A patent/JPS5425849A/en active Pending
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