Optical unit with detachably-mounted optics to maintain hermetic

Details Optical unit with detachably-mounted optics to maintain hermetic Optical unit with detachably-mounted optics to maintain hermetic

1988-04-20

1989-10-31

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Housings

250235, H01V 502

Patent

active

048779555

ABSTRACT:
In an optical unit for use in a light beam scanning apparatus, a housing that covers optical elements of which the optical system of said apparatus is composed is provided, and the optical elements that need occasional replacement are grouped into blocks as small units which are adapted to be individually remountable in the process of replacement without destroying the hermeticity of the interior of the housing. Being so designed, the optical unit enables the necessary optical elements to be sufficiently dustproof to ensure reliable operation of the light beam scanning apparatus.

REFERENCES:
patent: 3518437 (1970-06-01), Riggs
patent: 3631248 (1971-12-01), Johnson
patent: 4796963 (1989-01-01), Yoshimura

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