Illumination – Light source and modifier – Including reflector
Patent
1995-01-06
1996-06-11
Dority, Carroll B.
Illumination
Light source and modifier
Including reflector
362348, 362 61, F21V 700
Patent
active
055262481
ABSTRACT:
The improved projector type headlight according to the present invention comprises a reflector having two focuses, an HID bulb of which the discharging portion is located near the first one of the two focuses, and a convex lens which converges and projects rays of light emitted from the HID bulb and reflected by the reflector. Many fine concavities or convexities are formed over, or on a portion of, the effective reflecting area of the reflector. The HID bulb is advantageous in that it is small but provides a large amount of light. However, it emits locally colored rays light as will be evident from detailed observation of the discharging portion thereof. Such colored rays of light are appropriately scattered and mixed together due to reflection by the light diffusing surface having many fine concavities or convexities formed thereon, with the result that the reflected rays of light are almost whitened. Thus, the colored rays of light are little sensed by the human eyes. Furthermore, scattering of the rays of light enlarges the light distribution pattern of white rays of light and this pattern superposes on the colors around the illuminated area, thereby causing the colors to be less sensed by the human eyes.
REFERENCES:
patent: 4277821 (1981-07-01), Sassmannshausen
patent: 4404620 (1983-09-01), Takahashi et al.
patent: 5144190 (1992-09-01), Thomas et al.
patent: 5180218 (1993-01-01), Ohshio
Patent Abstracts of Japan, vol. 18, No. 3, (E-1485), Jan. 6, 1994, abstract of Yoshiki et al., "Metal Halide Lamp", Japanese 52-51055, Sep. 28, 1993.
Dority Carroll B.
Ichikoh Industries Ltd.
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