All-directional optical sensor apparatus

Details All-directional optical sensor apparatus All-directional optical sensor apparatus

1992-12-11

1995-09-19

Henry, Jon W.

Optical: systems and elements

Prism

With reflecting surface

359833, 359855, 359613, 359725, 250342, 250343, G02B 1704, G02B 508, G01J 104, G01J 508

Patent

active

054521351

ABSTRACT:
An all-directional optical sensor apparatus 8 includes an all-directional prism 20 which has a cylindrical-shaped body with a hollow-out cone section formed in its top surface 22. The surface 28 of the cone works as a reflector 30 for rays received through side surfaces 24 of the cylindrical-shaped body. An optical sensing element is disposed adjacent to a bottom surface 26 of the prism 20. A roof plate 40 having a dimension larger than the top surface 22 of the prism is arranged for shielding the entry of any light other than an input signal into an upper portion of the prism 20.

REFERENCES:
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patent: 2244235 (1941-06-01), Ayres
patent: 3383511 (1968-05-01), Palser
patent: 3505465 (1970-04-01), Rees
patent: 3777160 (1973-12-01), Bernt
patent: 3984178 (1976-10-01), Bergqvist
patent: 4271359 (1981-06-01), Herwig et al.
patent: 4514631 (1985-04-01), Guscott
patent: 4778996 (1988-10-01), Baldwin et al.
patent: 5227632 (1993-07-01), Armstrong et al.

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