| 摘要 |
1281816 Reflex cameras PENTACON DRESDEN KAMERA-UND KINOWERKE VEB 24 Oct 1970 50612/70 Heading G2A A reflex camera has a partially transmitting mirror 2 behind which is disposed a light guide 4 for directing light passing through objective 1 to the surface of a photo-electric cell 11. The light guide has a first group of several reflecting surfaces 5 which direct light to a second group, disposed opposite to the first group, and having several reflecting and refracting surfaces lying transversely of and inclined at 45 degrees to the optical axis. The reflected light passes through a narrow edge of the light guide 4 into a further light guide 10. The positions of surfaces 5 is determined by the average position of lenses of different focal lengths. |
