System for the reduction of laser equivalent surface and for opt

Details System for the reduction of laser equivalent surface and for opt System for the reduction of laser equivalent surface and for opt

1998-12-02

2000-08-01

Dang, Hung Xuan

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359245, G02F 103

Patent

active

06097527&

ABSTRACT:
A system for the reduction of a laser equivalent surface area and for the optical protection of an optical device including a first polarizer and a first multiple wavelength quarter-wave plate placed in series in the path of a multiple wavelength light beam between the polarizer and the optical device. This system brings into play polarized light, and associates a liquid crystal shutter with it, providing for protection against optical aggression. The entire unit may take the form of a detachable optical attachment.

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Hisao Kikuta, et al., "Achromatic Quarter-Wave Plates Using the Dispersion of Form Birefringence", Applied Optics, XP 000684848, vol. 36, No. 7, Mar. 1, 1997, pp. 1566-1572.
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