Optical: systems and elements – Single channel simultaneously to or from plural channels – By partial reflection at beam splitting or combining surface
Patent
1998-11-10
2000-09-26
Epps, Georgia
Optical: systems and elements
Single channel simultaneously to or from plural channels
By partial reflection at beam splitting or combining surface
359640, 359738, G02B 2714, G02B 2712, G02B 900
Patent
active
061249777
ABSTRACT:
An image display apparatus using a modified prism as an ocular optical system, in which unwanted light caused by reflection or transmission at an area outside the effective area of a reflecting or transmitting surface is reduced to provide a favorable image of high resolution, which is free from flare or ghost. The prism member (10), which is used as an ocular optical system, includes a first surface (1) having an action through which a light beam enters the prism member, a second surface (2) having an action by which the light beam is reflected in the prism member, and a third surface (3) having an action through which the light beam exits from the prism member. A black coating (12), which is an antireflection member having a flare- or ghost-preventing action, is provided over a part of a non-effective reflecting area of at least the second surface (2), exclusive of an effective reflecting area (an area reflecting an effective light beam that forms the virtual image).
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Epps Georgia
Olympus Optical Co,. Ltd.
Spector David N.
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