Device for reading image information includes facilities for keeping a constant, steady level for a quantity of light to be recorded.

摘要

An optical scanning head (50) is designed so that a quantity of light to be recorded is kept at a constant level while the optical scanning head slides in its scanning position. A photoelectron multiplier (PMT) (40) irradiates a test sample (10) with a bundle of laser rays (L). Fluorescence (K) from the test sample in the form of a divergent luminous aigrette passes to the PMT.