Illumination – Light source and modifier – Including selected wavelength modifier
Patent
1988-09-28
1990-01-16
Husar, Stephen F.
Illumination
Light source and modifier
Including selected wavelength modifier
350315, 362277, 362319, F21V 900
Patent
active
048947601
ABSTRACT:
An improved color-mixing light fixture that produces a beam suitable for entertainment lighting and varies the apparent color of the beam produced by additively mixing varying proportions of light having two or more different spectral energy distributions is disclosed. The disclosed fixture employs a single light source and a single light beam that provides at least one plane at which light energy passing through any given point is evenly distributed across the beam where it reaches the subject, and disposes a filter array having at least three filter segments each having a different bandpass characteristic spaced around an effective center in that plane. Rotation of the filter array about its effective center adjusts the relative proportion of the colors produced by the filter segments and displacement of it in that plane relative to the beam adjusts the relative proportions of filtered and unfiltered light.
REFERENCES:
patent: 3912361 (1975-10-01), Bentley
patent: 4361863 (1982-11-01), Hagner
patent: 4459014 (1984-07-01), Thebault
patent: 4600976 (1986-07-01), Callahan
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