Structural unit consisting of an ellipsoid reflector and a halogen incandescent lamp

摘要

The reflection surface of the reflector of the structural unit has a curvature which conforms to the shape of the curved element of an ellipse in accordance with the equation tilted through the angle 2 of -2.4 DEG . The luminaire of the halogen incandescent lamp of the structural unit is projected directly into the plane of the microfilm to be observed. Short bearing dimension. The collecting lens which is normally required because of a large bearing dimension is omitted. Structural unit for use as a light source in microfilm readers.