Optical assembly

摘要

An optical assembly comprises an optical device ( 103 ); an enclosure ( 101 ) for containing the optical device ( 103 ), the enclosure ( 101 ) including a transparent section ( 107 ) to allow passage of a light beam ( 104 ) to or from the optical device ( 103 ); and means for measuring the attenuation of a test light beam ( 212 ) through the transparent section( 107 ). Preferably, the optical assembly also comprises means for compensating for the measured amount of attenuation by adjusting a measurement or a characteristic of the optical device ( 103 ) or a related optical device to compensate for the measured amount of attenuation.