Patent Number: 7,131,740

Title: Optical system and optical apparatus provided with the same

Abstract: An optical system has a plurality of optical surfaces including a rotational-symmetrical optical surface and a reflection-type varaible optical-property element. The reflection-type variable optical-property element is interposed on the optical path between two optical surfaces, and a deflection angle .theta. of the optical axis caused by the reflection-type variable optical-property element satisfies the following condition: 10.degree.<.theta.<67.degree..

Inventors: Nishioka; Kimihiko (Hachioji, JP)

Assignee: Olympus Corporation

International Classification: G02B 5/08 (20060101)

Expiration Date: 2019-11-07 0:00:00