LASER RADIATION NONLINEAR-OPTICAL LIMITER Russian patent published in 2006 - IPC G02F1/35 

FIELD: laser engineering; optical engineering.

SUBSTANCE: limiter can be used for protection of eyes against damages caused by laser radiation. Limiter has telescope, nonlinear-optical element, disposed between lenses, and diaphragm. Nonlinear-optical element is made of transparent single-crystal material or of glass ceramic. The material has impurity of ions of transition metals which have absorption bands, which overlap laser generation line spectrum. Concentration of impurity ions equals to 10¹⁵-10¹⁸ cm^-3.

EFFECT: improved initial transmission of limiter in visual spectrum range; color viewing comfort.

2 dwg