| 摘要 |
PURPOSE:To easily and assuredly control focusing at the time of recording by deflecting part of the light which propagates through the light condensing type light transmitting body, such as, the image light of Braun tube, etc. so as to take it outside, and by monitoring it on the plane of the same optical path length as that of the recording plane. CONSTITUTION:Image light of Buaun tube 3 is focused on the photosensitive plane 1a of photosensitive drum 1 via light condensing type light transmitting body 2. Meanwhile, part of the image light is relfected on the glass block 4 provided between transmitting body 2 and drum 1, and it is focused on the diffusion plate 5 disposed at the point of the same optical path length as that of the photosensitive plane 1a. Therefore the image easily and assuredly focused can be recorded by shifting the face plate 6 in the direction of the optical axis while one is observing part of the image taken outside by the diffusion plate 5. |
