| 摘要 |
PURPOSE:To permit projection of nondistorted images to a screen from arbitrary directions with respect thereto by making the angles of a projecting lens system and a film holder changeable with respect to an optical axis. CONSTITUTION:A projecting lens system 1 and a film holder 2 are held respectively by angles 9, 9'. The angles 9, 9' respectively rotate to the right and left around detaining shafts 10, 10'. The lens system 1 and the holder 2 are respectively detained to the angles 9, 9' by means of detaining shafts 12, 12' and 13, 13' and these are so made that they can respectively rotate around the axis B passing the shafts 12, 12' and the axis C passing the shafts 13, 13' and incline vertically. The position of the entire part of the device is determined in the direction where the fluxes of beams are projected onto a screen, following to which it is so adjusted by changing the angles of inclination of the lens system 1 and the film holder 2 so that normal projected images are obtained. |
