Optics: image projectors – Composite projected image – Multicolor picture
Patent
1996-02-09
1997-12-09
Dowling, William
Optics: image projectors
Composite projected image
Multicolor picture
353 34, 353 37, 353 97, G03B 2114
Patent
active
056952660
ABSTRACT:
A projection-type display apparatus comprising a lamp, an ellipsoidal mirror, a diaphragm disposed in the vicinity of a secondary focus of the ellipsoidal mirror, a first color separating dichroic mirror for separating the light into a blue color beam and a beam having a wavelength outside the blue wavelength region, a second color separating dichroic mirror for separating the beam having the wavelength outside the blue wavelength region into a red color beam and a green color beam, light valves for displaying images respectively corresponding to the red, green and blue color beams, first lens for making the red, green and blue color beams respectively advancing toward the respective light valves into parallel or convergent beams, color synthesizing dichroic mirrors for synthesizing the red, green and blue color beams which have been transmitted through the respective light valves, and a projection lens for enlarging and projecting a synthesized beam onto a screen. The first lens is disposed downstream in a light propagation direction from the first color separating dichroic mirror.
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patent: 5519518 (1996-05-01), Watanabe
Daijogo Akira
Kida Hiroshi
Okamori Shinji
Shikama Shinsuke
Dowling William
Mitsubishi Denki & Kabushiki Kaisha
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