JPS57155511A - Finder optical system - Google Patents
Finder optical systemInfo
- 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
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.
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)
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 |
-
1981
- 1981-03-20 JP JP4112881A patent/JPS57155511A/en active Granted
Cited By (3)
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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