Projection television lens system

Details Projection television lens system Projection television lens system

1996-09-17

1998-09-15

Ben, Loha

Optical: systems and elements

Lens

With field curvature shaping

359713, 359756, G02B 300

Patent

active

058088040

ABSTRACT:
Six-component projection lens systems for use in projection televisions are provided. From the screen side, the systems preferably have a + - +++ - configuration. The use of a second lens element having a negative power results in improved sagittal modulation transfer functions (MTFs) at large field locations. The negative second lens element can be made of a low dispersion material, such as styrene, so as to provide partial correction of axial color.

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Dunham, C.B., and C.R. Crawford, "Minimax Approximation by a Semi-Circle," Society for Industrial and Applied Mathematics, vol. 17, No. 1, Feb., 1980 .

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