Catadioptric lens system with light transmission control means

Details Catadioptric lens system with light transmission control means Catadioptric lens system with light transmission control means

1978-10-02

1981-03-17

Clark, Conrad J.

350439, 350357, 354227, 354271, G02B 1708, G02B 522, G03B 956

Patent

active

042563720

ABSTRACT:
A catadioptric light system such as a module lens system capable of being mounted on a camera is provided. A plurality of light reflecting and refracting optic members are designed to provide a desired image forming light path through the lens system. Disposed within the lens system is an electrochromic device that is responsive to an applied voltage to provide a predetermined degree of light transmission intensity through the lens system. The electrochromic device can be a thin film mounted on a transparent plate or on a reflective surface. The housing of the lens system can be advantageously designed to contain its own power source.

REFERENCES:
patent: Re28199 (1974-10-01), Deb et al.
patent: 3578843 (1971-05-01), Castellion
patent: 4054890 (1977-10-01), Shimomura
patent: 4066335 (1978-01-01), Courtney et al.
patent: 4068928 (1978-01-01), Meyers
patent: 4106855 (1978-08-01), Coon

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