| 摘要 |
To prevent second-order like non-uniformities, that is, the cloud formation effect on the image plane of a projected light source, projecting light in a film window, the reflector (3) has a profile (p) which is discontinuous and formed of a sequence of conical surface segments (F) which are successively placed on the reflector from the apex to the rim and which have different angles with respect to the axis or center line (CL) of the reflector. Each one of the areal segments, in cross section, has a length (1) which is so dimensioned that the overall length of the images of the projected filament (2) of the lamp in the plane of the film window is equal to or larger than the diagonal of the image field, and adjacent segments intersect in a discontinuous reflector or profile in intersection circles which lie on a curve (K) forming a continuous reflector profile, which continuous reflector profile may be in accordance with any standard arrangement. |
