Method of fabricating diffractive optical element

Details Method of fabricating diffractive optical element Method of fabricating diffractive optical element

2007-10-23

2007-10-23

Amari, Alessandro (Department: 2872)

Optical: systems and elements

Diffraction

From grating

C359S900000, C430S001000

Reexamination Certificate

active

11590849

ABSTRACT:
A diffractive optical element is fabricated to have a first element and a second element of different materials bonded to each other with a diffraction grating formed between the elements. In forming the first element, a material thereof is stamped with a die having a diffraction grating pattern. In forming the second element, a photo-setting resin material is deposited on a diffraction grating surface of the first element, stamped with a die, and cured by transmitting light rays through the first element. The first and second elements are made of materials selected such that a transmittance of the first element and a transmittance of said second element are substantially equal to each other for the curing light rays. Differences in cure shrinkage of the photo-setting resin material are thereby controlled within a range so as not to degrade desired performance of the diffractive optical element.

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