JPS57155511A - Finder optical system - Google Patents

Finder optical system

Info

Publication number
JPS57155511A
JPS57155511A JP4112881A JP4112881A JPS57155511A JP S57155511 A JPS57155511 A JP S57155511A JP 4112881 A JP4112881 A JP 4112881A JP 4112881 A JP4112881 A JP 4112881A JP S57155511 A JPS57155511 A JP S57155511A
Authority
JP
Japan
Prior art keywords
light beam
eccentric
optical system
concave objective
finder optical
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
JP4112881A
Other languages
Japanese (ja)
Other versions
JPH0219930B2 (en
Inventor
Akira Tanabe
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 JP4112881A priority Critical patent/JPS57155511A/en
Publication of JPS57155511A publication Critical patent/JPS57155511A/en
Publication of JPH0219930B2 publication Critical patent/JPH0219930B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/14—Viewfinders

Landscapes

  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Telescopes (AREA)
  • Viewfinders (AREA)

Abstract

PURPOSE:To eliminate an unusable space around the eye piece of direct optical view finder by putting lenses eccentric and then moving an incidence and an emission optical axis in parallel. CONSTITUTION:In an inverted Galilean finder consisting of a concave objective 11 and another concave objective B, when surfaces r2 and r3 are put eccentric by a prescribed extent, a light beam L1 becomes a light beam L2 by passing through surfaces A, B, C, and D. Consequently, little unnecessary space is formed over a convex lens 13, so other parts are wide, or a camera is reduced in size on the whole. The upward and downward, and left and right movements of the light beam are determined adequately.
JP4112881A 1981-03-20 1981-03-20 Finder optical system Granted JPS57155511A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4112881A JPS57155511A (en) 1981-03-20 1981-03-20 Finder optical system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4112881A JPS57155511A (en) 1981-03-20 1981-03-20 Finder optical system

Publications (2)

Publication Number Publication Date
JPS57155511A true JPS57155511A (en) 1982-09-25
JPH0219930B2 JPH0219930B2 (en) 1990-05-07

Family

ID=12599797

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4112881A Granted JPS57155511A (en) 1981-03-20 1981-03-20 Finder optical system

Country Status (1)

Country Link
JP (1) JPS57155511A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59131737U (en) * 1983-02-23 1984-09-04 ブロニカ株式会社 Finder information autopsy device
US5761553A (en) * 1994-12-22 1998-06-02 Canon Kabushiki Kaisha Photographing device including viewfinder optical system having lens with asymmetrical dimensions

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59131737U (en) * 1983-02-23 1984-09-04 ブロニカ株式会社 Finder information autopsy device
JPH0423226Y2 (en) * 1983-02-23 1992-05-29
US5761553A (en) * 1994-12-22 1998-06-02 Canon Kabushiki Kaisha Photographing device including viewfinder optical system having lens with asymmetrical dimensions

Also Published As

Publication number Publication date
JPH0219930B2 (en) 1990-05-07

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