Diffractive optical element, method of producing same, and...

Details Diffractive optical element, method of producing same, and... Diffractive optical element, method of producing same, and...

2006-02-14

2006-02-14

Assaf, Fayez G. (Department: 2872)

Optical: systems and elements

Diffraction

From grating

C359S569000, C359S558000, C359S353000, C359S356000

Reexamination Certificate

active

06999235

ABSTRACT:
A diffractive optical element simultaneously realizes a plurality of optical functions and is small in size and excellent in productivity. The diffractive optical element has a multilayer member composed of a plurality of layers each of which is made of an optical material. Adjacent layers of the multilayer member are in contact with each other, and have different refractive indexes from each other. The multilayer member includes boundary faces between the contacted adjacent layers. Uneven patterns that cause transmitted light to undergo desired diffraction are formed on at least two faces of three faces including the boundary faces and outer surfaces of the multilayer member. The uneven patterns formed on different faces have different shapes or sizes in the direction of the layers of the multilayer member.

REFERENCES:
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patent: 5946281 (1999-08-01), Ito et al.
patent: 6157488 (2000-12-01), Ishii
patent: 2004/0125442 (2004-07-01), Yun et al.
patent: A 2000-147226 (2000-05-01), None

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