| 摘要 |
PURPOSE:To enable the observer to have a good observation and picking-up of the image of the cathode-ray tube at an optional position in front of the cathode- ray tube, by observing the image of the cathode-ray tube via the special masking substance and at the same time shielding the incidence of the incoming light into the camera. CONSTITUTION:The space formed between the front edge part of casing 9 of the cathode-ary tube and the front edge part of camera main body 4 is surrounded by cylindrical masking substance 10 which uses the filter panel transmitting only the beams having a certain wavelength band. And furthermore filter 12 passing through the band which does not overlap the transmitting wavelength band of another masking substance 10 is attached to the front surface of the camera lens. Thus an easy and simultaneous observation and picking-up is possible for both beams arriving at the eye 3 of the observer, i.e., the doctor and camera lens 8 respectively excepting in the case of the screen having the tint corresponding to the pass bands of the both beams each. At the same time, disturbance beam 6 given from outside or reflected light 7 given from the surface of the cathode-ray tube can be prevented from intruding into the camera. |
