Diffractive optical element and optical system using the same

Details Diffractive optical element and optical system using the same Diffractive optical element and optical system using the same

2011-03-29

2011-03-29

Amari, Alessandro (Department: 2872)

Optical: systems and elements

Diffraction

From grating

C065S066000

Reexamination Certificate

active

07916394

ABSTRACT:
A diffractive optical element includes stacked first and second diffraction gratings made of different materials. The materials of the first and second diffraction gratings are glass. The first and second diffraction gratings have grating surfaces contacted to each other. The materials satisfy a predetermined condition when Tg2and At2are a transformation point temperature and a yield point temperature of the material of the first diffraction grating, and Tg3and At3are a transformation point temperature and a yield point temperature of the material of the second diffraction grating.

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