JPS57161844A - Focusing glass - Google Patents

Focusing glass

Info

Publication number
JPS57161844A
JPS57161844A JP4762081A JP4762081A JPS57161844A JP S57161844 A JPS57161844 A JP S57161844A JP 4762081 A JP4762081 A JP 4762081A JP 4762081 A JP4762081 A JP 4762081A JP S57161844 A JPS57161844 A JP S57161844A
Authority
JP
Japan
Prior art keywords
parts
distance measurement
image
grating
slanting
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
JP4762081A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0332055B2 (enrdf_load_stackoverflow
Inventor
Keiji Otaka
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 JP4762081A priority Critical patent/JPS57161844A/ja
Publication of JPS57161844A publication Critical patent/JPS57161844A/ja
Publication of JPH0332055B2 publication Critical patent/JPH0332055B2/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)
JP4762081A 1981-03-31 1981-03-31 Focusing glass Granted JPS57161844A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4762081A JPS57161844A (en) 1981-03-31 1981-03-31 Focusing glass

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4762081A JPS57161844A (en) 1981-03-31 1981-03-31 Focusing glass

Publications (2)

Publication Number Publication Date
JPS57161844A true JPS57161844A (en) 1982-10-05
JPH0332055B2 JPH0332055B2 (enrdf_load_stackoverflow) 1991-05-09

Family

ID=12780249

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4762081A Granted JPS57161844A (en) 1981-03-31 1981-03-31 Focusing glass

Country Status (1)

Country Link
JP (1) JPS57161844A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
JPH0332055B2 (enrdf_load_stackoverflow) 1991-05-09

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