Diffractive optical device including grating elements with diffe

Details Diffractive optical device including grating elements with diffe Diffractive optical device including grating elements with diffe

1996-04-04

1998-04-21

Henry, Jon W.

Optical: systems and elements

Diffraction

From grating

359574, G02B 518, G02B 2744

Patent

active

057424330

ABSTRACT:
A diffractive optical device includes a substrate for allowing transmission therethrough of light to be diffracted; and a grating section located on the substrate and including a plurality of grating elements each having multiple discrete phase levels. The plurality of grating elements are arranged at different grating periods in different areas of a surface of the substrate and have the phase levels in different numbers in accordance with the grating period.

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