Optical: systems and elements – Glare or unwanted light reduction
Patent
1993-06-10
1994-11-15
Ben, Loha
Optical: systems and elements
Glare or unwanted light reduction
359612, 359698, 359823, 35419512, G02B 2700
Patent
active
053653734
ABSTRACT:
A light intercepting apparatus of a lens barrel is provided in which at least two lens assemblies, provided in the lens barrel, are adjustable in an optical axis direction. The apparatus includes a cylindrical light intercepting member which isolates a light path, defined between the lens assemblies, from outside light, wherein the light intercepting member is expandable and contractable in accordance with the relative movement of the lens assemblies. The apparatus further includes a holding member which holds an end of the light intercepting member so that the light intercepting member may be expanded or contracted.
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Asahi Kogaku Kogyo Kabushiki Kaisha
Ben Loha
Papalas Michael A.
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