Optical: systems and elements – Single channel simultaneously to or from plural channels – By partial reflection at beam splitting or combining surface
Patent
1990-06-25
1992-03-17
Ben, Loha
Optical: systems and elements
Single channel simultaneously to or from plural channels
By partial reflection at beam splitting or combining surface
358482, 362347, 359732, 359891, G02B 522
Patent
active
050962809
ABSTRACT:
A light source apparatus for separating a white light into light components of a plurality of colors, includes a white light source and at least two dichroic mirrors. Each mirror selects a light with a particular wavelength band from a visible light so as to transmit the light with the selected wavelength band therethrough. The mirrors reflect light with a wavelength band other than the selected wavelength band so that the transmitted wavelength bands of the mirrors are different from each other. The mirrors are arranged opposite to each other with respect to the white light source. The apparatus also includes condenser lenses which are combined with each of the dichroic mirrors. The light reflected by each of the dichroic mirrors is returned to the white light source.
REFERENCES:
patent: 2971051 (1961-02-01), Back
patent: 3537789 (1970-11-01), Kimura
patent: 4003634 (1977-01-01), Graser, Jr. et al.
Ben Loha
Sharp Kabushiki Kaisha
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