APPARATUS FOR EVALUATING GLAIR AT DIRECT GAZE

摘要

PURPOSE:To enable an accurate evaluation of the intensity of glair when a light source is gazed directly by simultaneously taking in information on the brightness of a light source, the solid angle of a part bringing the brightness and the background brightness of the light source to calculate them properly. CONSTITUTION:A lens system adapted to form an image with the solid angle of 6X10<-3> radian as optical system 1 and light passing through the system 1 is corrected in the visual sensitivity by a means 2 of correcting the visual sensitivity. Signals from a group of image sensors arranged in a plane at an image formation unit are taken out numerically in a time series by a means 3 of taking out a brightness signal and data recorded by a recording means 4. Data recorded by the recording means 4 is compared with a brightness set by a brightness level setting means 5 and a necessary data is taken into a CPU by taking out means 6 and 7. The data taken in are processed by arithmetic mean computing means 8 and 9 to obtain an arithmetic means, which correspond to the brightness of a glairing light source and that of the background.