DEVICE FOR MEASUREMENT OF LIGHT SOURCE POSITION IN PHOTOGRAPHIC EXPOSURE INSTALLATIONS Russian patent published in 1997 - IPC

FIELD: photographic exposure installations. SUBSTANCE: photographic exposure installation uses a plate with supporting stages, whose position corresponds to the supporting stages of the color picture-tube face being manufactured. Rigidly secured on the plate are guides consisting of fixed elements, movable elements of the displacement device. The displacement device is rigidly secured on the plate and consists, for instance, of a micrometer screw and a stop. Photodetectors oriented at a preset angle to datum plane A of the plate, for example, close to half the maximum angle of deviation of electron beams in the picture tube, are installed on brackets symmetrically relative to the plate center. A photodetector has a diaphragm, limiting the light flux, and a receiving stage detecting the shift of the falling light flux relative to the center. The light source and the optical correcting system are preliminary adjusted and centered. EFFECT: minimized error of light source adjustment in photo exposure installations for three colors. 1 dwg