Optical system for processing a light beam

Details Optical system for processing a light beam Optical system for processing a light beam

2011-05-31

2011-05-31

Collins, Darryl J (Department: 2873)

Optical: systems and elements

Lens

With light limiting or controlling means

C359S629000, C359S744000, C359S795000

Reexamination Certificate

active

07952816

ABSTRACT:
Optical system for processing a light beam comprises first and second optical means that are convergent and divergent respectively and form an afocal optical device. The first optical means comprises a single convergent lens. According to the invention, this convergent lens provides an order0beam and an order2beam resulting from the light beam to be processed passing through this lens after having been subjected to a 0 reflection and 2 reflections respectively on the lens faces, and the lens is optimised for the order2beam and has an aperture f/# less than 4 for this order2beam, with a wave front quality less than λ peak-to-valley, where λ is the wavelength of the light beam to be processed.

REFERENCES:
patent: 4861148 (1989-08-01), Sato et al.
patent: 5040886 (1991-08-01), Gunter
patent: 0240194 (1987-10-01), None
patent: 0721113 (1996-07-01), None
patent: 11032278 (1999-02-01), None

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