Optical: systems and elements – Compound lens system – With curved reflective imaging element
Patent
1996-03-27
1998-08-04
Epps, Georgia Y.
Optical: systems and elements
Compound lens system
With curved reflective imaging element
359649, 359709, 359712, 359728, 359853, 359868, 359869, 359 49, G02B 1700, G02B 300, G02B 510, G02F 11335
Patent
active
057903050
ABSTRACT:
The disclosure relates to an LCD projector illumination system that optimizes the illumination through a liquid crystal screen as well as through the aperture of the system's objective, wherein the shape Zr,.beta. of the reflector is described by a set of elementary surfaces dS each of which is associated with a function Z(.rho.), corresponding to a median plane (r,.beta.) to be illuminated, defined by the distance r between the center and the edges of said screen and the angle .beta. between the horizontal plane and this median plane, the inclination of each elementary surface dS being computed by interpolating said functions Z(.rho.) with a function Z(x,y).
REFERENCES:
patent: 4136926 (1979-01-01), Sigler
patent: 4234247 (1980-11-01), Dorman
patent: 4733955 (1988-03-01), Cook
patent: 5098184 (1992-03-01), Van Den Brandt et al.
patent: 5222025 (1993-06-01), Taylor, II
patent: 5331470 (1994-07-01), Cook
patent: 5640283 (1997-06-01), Warren
Bass, Michael, Editor in Chief, Handbook of Optics: Fundamentals, Techniques, & Designs, Second Edition, vol. I, McGraw-Hill, Inc., New York, pp. 1.35-1.39, 1995.
Applied Optics, vol. 31, No. 28, Oct. 1, 1992, New York, USA pp. 6027-6035, J.M. Gordon,et al. "Non-Imaging Reflectors for Efficient Uniform Illumination" p. 6027, figure 1.
Marcellin-Dibon Eric
Wielhege Friedheim
Epps Georgia Y.
Lester Evelyn A.
Thomson Multimedia S.A.
Tripoli Joseph S.
Wein Frederick A.
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