Diffractive optical element, an optical system having a diffract

Details Diffractive optical element, an optical system having a diffract Diffractive optical element, an optical system having a diffract

1998-03-05

1999-11-30

Epps, Georgia

Optical: systems and elements

Diffraction

From grating

359575, 359742, 369109, G02B 518, G02B 308, G11B 700

Patent

active

059952865

ABSTRACT:
An optical system has a diffractive optical element. A diffractive optical surface of the optical element has a blaze-shaped diffraction grating. The grating heights are smaller in the peripheral region of the grating than in the central region of the grating around its optical axis. The optical element acts as a lenses a result of light rays being deflected by the light-diffracting action of the diffractive optical surface.

REFERENCES:
patent: 5054905 (1991-10-01), Cohen
patent: 5543966 (1996-08-01), Meyers
patent: 5737125 (1998-04-01), Ohashi

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