Title:
HIGH MAGNIFYING POWER REAL IMAGE SYSTEM FINDER OPTICAL SYSTEM
Document Type and Number:
Japanese Patent JP3594249
Kind Code:
B2
Abstract:
PURPOSE: To provide a high magnifying power real image system finder optical system capable of obtaining a wide field angle, securing a long distance from the final face of an eyepiece to an eye point and easily observing even in the case of obtaining the high magnifying power of the finder.
CONSTITUTION: The optical system is constituted of a meniscus lens 1a whose concave face faces an object side and having a negative refractive power and a lens 1b having a positive refractive power, and as the whole, the finder system is constituted of an objective lens system 1 having the positive refractive power, a 1st reflection member 2 for turning an image formed by the objective lens system 1 upside down, a 2nd reflection member 3 for turning the image formed by the objective lens system 1 in a horizontal direction and an eyepiece system 4 having the positive refractive power, furthermore, a visual field frame 5 is arranged between the 1st reflection member 2 and the 2nd reflection member 3.
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Inventors:
Yu Morooka
Application Number:
JP6717794A
Publication Date:
November 24, 2004
Filing Date:
April 05, 1994
Export Citation:
Assignee:
Olympus Endo Technology America Inc.
International Classes:
G02B13/18; G02B25/00; G03B13/06; (IPC1-7): G02B25/00; G02B13/18; G03B13/06
Domestic Patent References:
| JP6082694A | ||||
| JP1154114A | ||||
| JP62007017A | ||||
| JP6082694A | ||||
| JP5093863A | ||||
| JP6075165A | ||||
| JP4188123A |
Attorney, Agent or Firm:
Yasushi Shinohara