System for the reduction of laser equivalent surface and for optical protection

摘要

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.