Optical: systems and elements – Absorption filter – Movable in or out of optical path
Patent
1992-07-23
1993-07-27
Herrmann, Allan D.
Optical: systems and elements
Absorption filter
Movable in or out of optical path
74 52, 74479R, 355 71, 359891, 359892, G02B 522, G02B 700, G03B 2752
Patent
active
052315371
ABSTRACT:
A filter conversion device is employed in an optical system that is operative to locate one of a plurality of color filter units in an optical path frame member and is provided to support a plurality of filter units and is arranged so as to be movable in a predetermined plane between a light sending element and a light receiving element. Mechanisms for controlling the frame member to move horizontally and vertically in the plane are also provided. Thus, the desired filter unit is located in the optical path without requiring a large space for movement.
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Asahi Kogaku Kogyo Kabushiki Kaisha
Herrmann Allan D.
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