JPS53125832A - Focusing screen - Google Patents

Focusing screen

Info

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
Application number
JP4070377A
Other languages
Japanese (ja)
Inventor
Toshihiro Imai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Olympus Corp
Original Assignee
Olympus Optical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP4070377A priority Critical patent/JPS53125832A/en
Publication of JPS53125832A publication Critical patent/JPS53125832A/en
Pending legal-status Critical Current

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
JP4070377A 1977-04-09 1977-04-09 Focusing screen Pending JPS53125832A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4830927A (en) * 1971-08-26 1973-04-23
JPS4922930B1 (en) * 1968-12-12 1974-06-12

Patent Citations (2)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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