| 摘要 |
<p>The adjuster changes the image plane of a stage light projector. The arrangement changes the useful scatter angle and no masking is necessary with associated light flux losses. The image boundary sharpness is not lost and lighting is uniform without coloured patches. The optical system (14) consisting of light source (16), reflector (22) and condenser lenses (26, 28, 30) is moved relative to fixed objective lens (10) without need for sharpness adjustment. The whole unit moves on a slide and the lens (10) is fixed on the projector housing. The optical system may have only one biconvex lens. Colours filters (54, 56) can be placed between two condenser lenses (26, 28).</p> |
