Projection system for projecting a color video picture and trans

Details Projection system for projecting a color video picture and trans Projection system for projecting a color video picture and trans

1996-05-14

1997-12-02

Peng, John K.

Television

Video display

Projection device

348747, 348757, 348803, 359618, 359652, H04N 323, H04N 574, G02F 100, G02B 2710

Patent

active

056941803

ABSTRACT:
In a projection system for projecting a video picture composed of picture points on a screen with at least one light source which emits a light bundle and can be varied in intensity and with a deflecting device which deflects the light bundle to illuminate the picture points on the screen, a transformation optical system having at least two stages is arranged between the deflecting device and the screen and is corrected according to the tangent condition so as to be free of distortion. The transformation optical system has at least two optical stages. The first optical stage produces an intermediate image plane which is imaged on the screen by means of the subsequent optical stage (s).

REFERENCES:
patent: 3708616 (1973-01-01), Von Fogel
patent: 3864730 (1975-02-01), Roth
patent: 4003080 (1977-01-01), Maiman
patent: 4297723 (1981-10-01), Whitby
patent: 4979030 (1990-12-01), Murata
patent: 5136426 (1992-08-01), Linden et al.
patent: 5138441 (1992-08-01), Tanaka
Patent Abstracts of Japan, vol. 16, No. 189 (P-1348), May 8, 1992 (Japanese Publication No. JP 4024685, published Jan. 28, 1992).
Article entitled "High Quality Laser Color Television Display, by Teiichi Taneda et al, Journal of the SMPTE", vol. 82, Jun. 1973, pp. 470-474.

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