Concave reflecting mirror for a light source

Details Concave reflecting mirror for a light source Concave reflecting mirror for a light source

1998-02-06

2000-08-15

Tso, Laura K.

Illumination

Light modifier

Reflector

363346, 363297, F21V 700

Patent

active

061025550

ABSTRACT:
An improved reflective mirror for floodlights that can diffuse and reflect a beam of light from a light source in uniform brightness in a given floodlight area is provided. A concave reflecting mirror is provided with an aperture at the axis center of the mirror for inserting a light source such as a bulb, so that the inner periphery of the reflecting mirror is on the side and behind the light source. A plurality of reflectors are formed in the inner periphery of the reflecting mirror in a spiral profile when viewed from the front. The reflectors spiral out from the axis center of the reflecting mirror. Each of the reflectors has a convex or concave profile surface, so that a cross section of the reflective mirror inner periphery surface appears to be ribbed.

REFERENCES:
patent: 1141361 (1915-06-01), Schmidt et al.
patent: 1258007 (1918-03-01), Hess
patent: 1287298 (1918-12-01), Halvorson, Jr. et al.
patent: 2089610 (1937-08-01), Kloos
patent: 3337871 (1967-08-01), Greenberg et al.
patent: 5556194 (1996-09-01), Natsume et al.

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