| 摘要 |
<p>356,971. Optical-projection apparatus. DARIMONT, L., 266, Rue Adolphe Willemyns, Brussels. Oct. 17, 1930, No. 31169. [Class 97 (i).] Images are projected on to a screen of frosted glass or the like associated with two separate flat mirrors, and an opaque screen is placed between the cone of light from the projector and the rays proceeding from the second mirror. The projection screen 2 may be between the projector 1 and the first mirror 3, or may be between the two mirrors 3, 4. The opaque screen 5 is placed between the rays from the projector 1 and the rays proceeding to the spectator 6.</p> |
