JPH0332054B2 - - Google Patents

Info

Publication number
JPH0332054B2
JPH0332054B2 JP4761981A JP4761981A JPH0332054B2 JP H0332054 B2 JPH0332054 B2 JP H0332054B2 JP 4761981 A JP4761981 A JP 4761981A JP 4761981 A JP4761981 A JP 4761981A JP H0332054 B2 JPH0332054 B2 JP H0332054B2
Authority
JP
Japan
Prior art keywords
diffraction grating
slopes
microstructures
images
diffraction
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.)
Expired
Application number
JP4761981A
Other languages
English (en)
Japanese (ja)
Other versions
JPS57161843A (en
Inventor
Keiji Ootaka
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 JP4761981A priority Critical patent/JPS57161843A/ja
Publication of JPS57161843A publication Critical patent/JPS57161843A/ja
Publication of JPH0332054B2 publication Critical patent/JPH0332054B2/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)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)
JP4761981A 1981-03-31 1981-03-31 Focusing glass Granted JPS57161843A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4761981A JPS57161843A (en) 1981-03-31 1981-03-31 Focusing glass

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4761981A JPS57161843A (en) 1981-03-31 1981-03-31 Focusing glass

Publications (2)

Publication Number Publication Date
JPS57161843A JPS57161843A (en) 1982-10-05
JPH0332054B2 true JPH0332054B2 (enrdf_load_stackoverflow) 1991-05-09

Family

ID=12780226

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4761981A Granted JPS57161843A (en) 1981-03-31 1981-03-31 Focusing glass

Country Status (1)

Country Link
JP (1) JPS57161843A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140301684A1 (en) * 2011-09-02 2014-10-09 Cyril Bouron Spacer for rolling bearing, notably used in a wind turbine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10293205A (ja) * 1997-04-18 1998-11-04 Minolta Co Ltd 回折光学素子及び金型の製造方法
JP4587172B2 (ja) * 2005-04-01 2010-11-24 キヤノン株式会社 回折光学素子、回折光学素子の製造方法、及び回折光学素子成形用金型の製造方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140301684A1 (en) * 2011-09-02 2014-10-09 Cyril Bouron Spacer for rolling bearing, notably used in a wind turbine

Also Published As

Publication number Publication date
JPS57161843A (en) 1982-10-05

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