VARIABLE-MAGNIFICATION OBSERVATION OPTICS

Title:

VARIABLE-MAGNIFICATION OBSERVATION OPTICS

Document Type and Number:

WIPO Patent Application WO/2014/181750

Kind Code:

A1

Abstract:

These variable-magnification observation optics are provided with an objective system, an erecting system, and an eyepiece system. In order from the object side, the objective system comprises a positive first group, a positive second group, and a negative third group. In order from the object side, the eyepiece system comprises a positive fourth group and a positive fifth group. The erecting system is located between the first and second groups. In order from the object side, the fifth group comprises the following, with air gaps in between: a negative meniscus lens, the concave surface of which faces the object side; a negative meniscus lens, the convex surface of which faces the object side; and a biconvex positive lens.

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Inventors:

JIN MAKOTO (JP)

Application Number:

PCT/JP2014/062061

Publication Date:

November 13, 2014

Filing Date:

May 01, 2014

Export Citation:

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Assignee:

KONICA MINOLTA INC (JP)

International Classes:

G02B25/00; G02B23/02

Foreign References:

JPH055840A	1993-01-14
JP2012252241A	2012-12-20
JP2004139065A	2004-05-13
JP2003315687A	2003-11-06
JP2003315687A	2003-11-06

Other References: