JPS57130023A - Focusing screen - Google Patents

Focusing screen

Info

Publication number
JPS57130023A
JPS57130023A JP1640781A JP1640781A JPS57130023A JP S57130023 A JPS57130023 A JP S57130023A JP 1640781 A JP1640781 A JP 1640781A JP 1640781 A JP1640781 A JP 1640781A JP S57130023 A JPS57130023 A JP S57130023A
Authority
JP
Japan
Prior art keywords
area
focusing screen
grating
circumference
light deflecting
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.)
Granted
Application number
JP1640781A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0332053B2 (enrdf_load_stackoverflow
Inventor
Susumu Matsumura
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP1640781A priority Critical patent/JPS57130023A/ja
Publication of JPS57130023A publication Critical patent/JPS57130023A/ja
Publication of JPH0332053B2 publication Critical patent/JPH0332053B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/18—Focusing aids
    • G03B13/24—Focusing screens

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Viewfinders (AREA)
JP1640781A 1981-02-06 1981-02-06 Focusing screen Granted JPS57130023A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1640781A JPS57130023A (en) 1981-02-06 1981-02-06 Focusing screen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1640781A JPS57130023A (en) 1981-02-06 1981-02-06 Focusing screen

Publications (2)

Publication Number Publication Date
JPS57130023A true JPS57130023A (en) 1982-08-12
JPH0332053B2 JPH0332053B2 (enrdf_load_stackoverflow) 1991-05-09

Family

ID=11915382

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1640781A Granted JPS57130023A (en) 1981-02-06 1981-02-06 Focusing screen

Country Status (1)

Country Link
JP (1) JPS57130023A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6516152B1 (en) 1999-05-13 2003-02-04 Minolta Co., Ltd. Focusing screen for use in camera
JP2007233171A (ja) * 2006-03-02 2007-09-13 Nikon Corp 表示装置、画像観察装置、カメラおよび画像観察方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6516152B1 (en) 1999-05-13 2003-02-04 Minolta Co., Ltd. Focusing screen for use in camera
JP2007233171A (ja) * 2006-03-02 2007-09-13 Nikon Corp 表示装置、画像観察装置、カメラおよび画像観察方法

Also Published As

Publication number Publication date
JPH0332053B2 (enrdf_load_stackoverflow) 1991-05-09

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