Light transmission control apparatus

Details Light transmission control apparatus Light transmission control apparatus

1982-12-27

1985-12-24

Corbin, John K.

350 9615, G02B 2602

Patent

active

045602387

ABSTRACT:
An apparatus for controlling the amount of converged light having a high energy density which is transmitted through a predetermined optical path. The apparatus or light switch is disposed in the vicinity of the optical path and operable either in a stepwise manner or in a stepless manner as desired. A flat plate made of isotropic graphite serves as a light interceptor and is driven by an operation member into and out of the optical path within a plane which is perpendicular to the optical path. The plate does not reflect the light or become heated by the light due to provision of heat radiator means.

REFERENCES:
patent: 593993 (1897-11-01), Elwood
patent: 2380216 (1945-07-01), Carter
patent: 3039349 (1962-06-01), Rodgers
patent: 3480347 (1969-11-01), Walter et al.
patent: 3685885 (1972-08-01), Scott
patent: 3717171 (1973-02-01), Fawkes

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