REFLECTION TYPE VIEWING ANGLE CONVERTING OPTICAL DEVICE AND OPTICAL SYSTEM USING THE DEVICE

Title:

REFLECTION TYPE VIEWING ANGLE CONVERTING OPTICAL DEVICE AND OPTICAL SYSTEM USING THE DEVICE

Document Type and Number:

Japanese Patent JPH1054939

Kind Code:

A

Abstract:

To provide a reflection type viewing angle converting optical device making light intensity excellent and easy to machining by using a reflection mirror even in a wide angle optical system.

This device is composed of a primary mirror 8, a secondary mirror 10 and a third mirror 37 having rotary symmetric reflection surfaces, an incident light beam from an object is reflected by the primary mirror 8, the reflected beam is reflected by the secondary mirror 10 arranged opposite to the primary mirror 8, the reflected light beam is converged on a visual point by the third mirror 37 arranged opposite to the secondary mirror 10 and a wide visual field is obtained by variously changing the positions and the shapes of mirror surfaces of the primary, secondary and third mirrors.

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Inventors:

TAKEYA AKIHITO
KURODA TAKESHI
NISHIGUCHI KENICHI
ICHIKAWA AKIRA
YOSHIKAWA SHOJI
YAMADA KATSUHIKO

Application Number:

JP13731997A

Publication Date:

February 24, 1998

Filing Date:

May 27, 1997

Export Citation:

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Assignee:

MITSUBISHI ELECTRIC CORP

International Classes:

G02B17/00; G02B27/18; (IPC1-7): G02B17/00; G02B27/18

Attorney, Agent or Firm:

Masuo Oiwa

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