| 摘要 |
<p>360,322. Optical-projection apparatus. INNES, R. T. A., 3, Webb Street, Yeoville, Johannesburg, South Africa. March 10, 1931, No. 7383. [Class 97 (i).] Kinematograph pictures are projected, as shown in the Figure, on a screen 4, and a reflection of the images projected upon the screens is viewed in the mirror 2, which is of glass with a silvered or like backing 2b or may be of other non-transparent material. A concave mirror, which mya be of spherical, paraboloidal, or other formation, and which has a focal length greater than the distance by which the screen is separated from the mirror may be employed.</p> |
