Illumination homogenizing optical element

Details Illumination homogenizing optical element Illumination homogenizing optical element

2007-07-20

2009-06-30

Spector, David N (Department: 2873)

Optical: systems and elements

Single channel simultaneously to or from plural channels

By surface composed of lenticular elements

C359S625000, C359S639000

Reexamination Certificate

active

07554739

ABSTRACT:
An illumination homogenizing optical element is disclosed that includes at least one optical surface having a plurality of refractive structures formed as either grooves or protrusions that, individually, are wider than the wavelength of light incident onto said illumination homogenizing optical element. At least part of the light incident onto the illumination homogenizing optical element is removed from the optical path by refraction of said light so as to provide even illumination on an illuminated surface. The illumination homogenizing optical element is advantageous over prior art illumination homogenizing optical elements in that it is easy and inexpensive to manufacture while providing sufficient optical performance.

REFERENCES:
patent: 2007/0091444 (2007-04-01), Kim et al.
patent: 2007/0268575 (2007-11-01), Yamazaki
patent: 2009/0034063 (2009-02-01), Yamazaki et al.
patent: 2005-215992 (2005-08-01), None
patent: 2006-30535 (2006-02-01), None

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