| 摘要 |
PURPOSE:To achieve a excellent image on a screen at a specified distance by taking the light axis of a light source on the same light axis in matching with a project image optical axis reflected by 90 deg. on a half mirror. CONSTITUTION:A video lens 2 matching the light axis on the center line of a video CRT1 and a half mirror 3 reflecting a projection image and transmitting the light from a light source, are provided. In matching with the video light axis reflected by 90 deg. on the half mirror 3, a light source lamp 5, light source aperture 6, and light source lens 7 are provided so that the light axis is on the same axis. A screen 4 is provided at a distance pre-designed from the axis center of the half mirror 3 and the screen image can best be observed by adjusting the lenses 7 and 2. |
