Laser beam optical focusing system of two symmetrical diffractiv

Details Laser beam optical focusing system of two symmetrical diffractiv Laser beam optical focusing system of two symmetrical diffractiv

1997-06-26

1999-05-25

Spyrou, Cassandra

Optical: systems and elements

Diffraction

From zone plate

359569, 359 19, G02B 2744

Patent

active

059074353

ABSTRACT:
A laser beam optical focusing system consists of two symmetrical diffractive optical elements. The optical system has a spot size of less than one micron and a Strehl ratio of over 0.9 with a f
umber of one and a total object/image field of either 0.5 or 1 micron.

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G. J. Swanson, Binary Optics Technology: The Theory and Design of Multi-level Diffractive Optical Elements, Technical Report 854, Aug. 14, 1989.

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