Unpolished optical element with periodic surface roughness

Details Unpolished optical element with periodic surface roughness Unpolished optical element with periodic surface roughness

2007-07-31

2007-07-31

Mahoney, Christopher (Department: 2851)

Optics: image projectors

Polarizer or interference filter

C353S122000, C359S569000

Reexamination Certificate

active

11105766

ABSTRACT:
An optical sub-system has an optical element having a curved surface featured with a plurality of recurring surface tooling marks. The depth of any surface tooling mark is less than 0.2 wavelengths, whereby light is diffracted on the curved surface. A spatial filter blocks the diffracted light and passes the undiffracted light.

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