| 摘要 |
In order to compensate for the "Keystone-effect," a still projector is equipped with a vertically adjustable lens holder, which is coupled by a sliding pivot to a pivotable lamp housing. The lamp housing has a pair of arms projecting therefrom, which have slots extending therein which, in turn, register with pins positioned in the lens holder. The pins are located adjacent the rear nodal plane of the lens, and are aligned with an axis, which intersects the optical axis of the lens. Upon adjusting the holder vertically, the lamp housing will tilt to insure that the projected image will angularly conform to the original. |
