Stained compensation filter for optical devices - comprises optical glass part having planar structure and interference filter layer

摘要

Stained compensation filter comprises an optical glass part having a planar surface to compensate for the green colouring in the observation beam bundle and at the same time to compensate for the blue colouring in the photo beam bundle. The part has an interference filter layer of compsn. (I): nG/0.3019H/0.6179L/0.7495H/(0.4910L/0.9722H)50.9616L/ 2.0773H/0.4700L/0.6630H/I nG = reference index of the optical glass part (1.52-1.9); I = refractive index (nL) of air; H = highly deflecting partial layer of refractive index (nH) = 2.05; and L = low deflecting partial layer of refractive index (nL) = 1.38. The factors standing for H and L represent quarter wave length coefficients (/4) for a reference wave length of lambda = 500 nm. USE - Used for optical devices, esp. microscopes.