Non-planar optical diffraction grating having an arbitrary...

Details Non-planar optical diffraction grating having an arbitrary... Non-planar optical diffraction grating having an arbitrary...

2005-07-01

2010-06-01

Chang, Audrey Y (Department: 2872)

Optical: systems and elements

Diffraction

From grating

C359S573000, C359S575000, C359S569000

Reexamination Certificate

active

07729052

ABSTRACT:
An optical diffraction grating having a superior ultra-precise non-planar surface shape desired in extremely sensitive and complex optical imaging devices (e.g. spectrometers or hyperspectral imagers) is provided. The optical diffraction grating comprises a substrate having a plurality of substantially parallel grooves, wherein each of the grooves includes a plurality of substantially parallel sub-grooves. A non-planar substrate surface shape is defined by a combination of the grooves. A groove profile is defined by a combination of the sub-grooves within a corresponding one of the grooves. In a preferred method of manufacturing the optical diffraction grating, a rotating spindle technique would be employed.

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