Renticular lens, surface light source, and liquid crystal displa

Details Renticular lens, surface light source, and liquid crystal displa Renticular lens, surface light source, and liquid crystal displa

1993-12-27

1997-01-07

Epps, Georgia Y.

Optical: systems and elements

Single channel simultaneously to or from plural channels

By surface composed of lenticular elements

359591, 359621, 359455, G02B 2710, G02B 1700, G03B 2160

Patent

active

055923321

ABSTRACT:
A lenticular lens has a light transmitting substrate and a plurality of lens elements formed on the light transmitting substrate. The lens elements are defined in such a way that ridges thereof are aligned in parallel with each other, wherein 30.degree..ltoreq..theta..sub.10% .ltoreq.100.degree. and R.ltoreq.20%, where .theta..sub.10% is a diffusing angle range with respect to normal of the one surface in the case that when light is entered from the opposite surface and transmitted from the one surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe. The intensity of side lobes which causes light loss and light stray can be remarkably reduced. Light can be equally and isotropically focused on in a predetermined diffusing angle range.

REFERENCES:
patent: 4432010 (1984-02-01), Oguino
patent: 4573764 (1986-03-01), Bradley
patent: 4730897 (1988-03-01), McKechnie
patent: 4919518 (1990-04-01), Ogino

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