JPS53125832A - Focusing screen - Google Patents
Focusing screenInfo
- Publication number
- JPS53125832A JPS53125832A JP4070377A JP4070377A JPS53125832A JP S53125832 A JPS53125832 A JP S53125832A JP 4070377 A JP4070377 A JP 4070377A JP 4070377 A JP4070377 A JP 4070377A JP S53125832 A JPS53125832 A JP S53125832A
- Authority
- JP
- Japan
- Prior art keywords
- focusing screen
- plane
- focusing
- fresnel
- curving
- 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
Landscapes
- Viewfinders (AREA)
Abstract
PURPOSE: To accomplish the satisfactory focusing operation of a system having a Fresnel plane by curving the focusing plane in accordance with the curvature of the image due to the Fresnel plane.
COPYRIGHT: (C)1978,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4070377A JPS53125832A (en) | 1977-04-09 | 1977-04-09 | Focusing screen |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4070377A JPS53125832A (en) | 1977-04-09 | 1977-04-09 | Focusing screen |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3117384A Division JPS606931A (en) | 1984-02-21 | 1984-02-21 | Focusing screen |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS53125832A true JPS53125832A (en) | 1978-11-02 |
Family
ID=12587924
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4070377A Pending JPS53125832A (en) | 1977-04-09 | 1977-04-09 | Focusing screen |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS53125832A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0654611A (en) * | 1991-06-25 | 1994-03-01 | Mitsubishi Agricult Mach Co Ltd | Fertilizing machine |
US6314242B1 (en) | 1998-09-29 | 2001-11-06 | Olympus Optical Co., Ltd. | Single-lens reflex view finder |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4830927A (en) * | 1971-08-26 | 1973-04-23 | ||
JPS4922930B1 (en) * | 1968-12-12 | 1974-06-12 |
-
1977
- 1977-04-09 JP JP4070377A patent/JPS53125832A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4922930B1 (en) * | 1968-12-12 | 1974-06-12 | ||
JPS4830927A (en) * | 1971-08-26 | 1973-04-23 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0654611A (en) * | 1991-06-25 | 1994-03-01 | Mitsubishi Agricult Mach Co Ltd | Fertilizing machine |
US6314242B1 (en) | 1998-09-29 | 2001-11-06 | Olympus Optical Co., Ltd. | Single-lens reflex view finder |
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