Diffractive optical element

Details Diffractive optical element Diffractive optical element

2006-05-09

2006-05-09

Assaf, Fayez G. (Department: 2872)

Optical: systems and elements

Diffraction

From grating

C359S569000, C359S571000, C359S566000

Reexamination Certificate

active

07042642

ABSTRACT:
A diffractive optical element includes a first diffractive element and a second diffractive element that is made of a material different from that of the first diffractive element and is cemented with the first diffractive element, forming a diffraction grating at the cemented surface. A shade film is formed on a wall surface of each groove of the diffraction grating to enhance the angular characteristic of the grating.

REFERENCES:
patent: 2003/0112515 (2003-06-01), Nakabayashi
patent: 2002-48906 (2002-02-01), None

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