Optical reflecting unit

Details Optical reflecting unit Optical reflecting unit

1992-09-24

1994-08-02

Ben, Loha

Optical: systems and elements

Glare or unwanted light reduction

With mirror

359614, 359629, 359839, G02B 1700, G02B 2710, G02B 508

Patent

active

053351142

ABSTRACT:
An optical reflecting unit comprises a support prism extending in an elongated manner, and a half mirror fixedly mounted in contact with a surface of the support prism. An optical axis of the incident light in the form of a line incident upon a half mirror is folded. A transmitted light transmitted through the half mirror is incident upon the support prism. An extracted bore is provided in which an incident transmitted light is irregularly reflected by a bottom and a peripheral wall of the extracted bore. With the arrangement discussed above, the transmitted light transmitted through the half mirror and reflected by the surface of the half-mirror support prism is not deviated in a direction along the optical axis of the reflected light from the half mirror. Only the reflected light from the half mirror can be led to a predetermined direction.

REFERENCES:
patent: 2956476 (1960-10-01), Rupert
patent: 3984157 (1976-10-01), Le Vantine
patent: 4968139 (1990-11-01), Willing
patent: 5011265 (1991-04-01), Tamamura et al.

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