Elektro-optischer Signalumwandler

• Main Authors: S. STROBEL,JOHN, M. LEAVY JUN.,PAUL
• Format: Patent
• Language: German
• Published: 12.06.1969
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; CALCULATING; COMPUTING; COUNTING; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; ELECTRIC DIGITAL DATA PROCESSING; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

1,078,692. Optical apparatus. SANDERS ASSOCIATES, Inc. June 26, 1964 [June 26, 1963], No.25555/64. Heading G2J. [Also in Divisions G1 and H2] Apparatus for producing electrical signals corresponding to light flashes on the screen of a cathode ray tube, comprises a first bundle of optical fibres receiving light from the cathode ray tube screen and conveying it to a photo-sensitive detector and a second bundle of optical fibres directing light from a source on to the face of the cathode ray tube in order to indicate the area from which the first bundle receives light. Light from source 36 is focused on the end of the bundle of optical fibres 28,and emerges from the upper end of the bundle to be focused on the screen of the cathode ray tube 10 light flashes from the screen of tube 10 are conveyed by an optical fibre bundle 30 to a photo-multiplier 46. A filter 44 is inserted to restrict the radiation received to fast rise time components of the phosphor 16 and eliminate reflections of the light from source 36. The output from photo-multiplier PM, Fig. 4, is amplified and filtered by the filter C3, R17 to restrict it to light pulses having a fast rise time and applied to the input of a monostable multi-vibrator SG to give an output of the terminal PO. The output at PO is also fed via the capacitor C10 to set the bi-stable multi-vibrator Q8, Q9 which serves to extinguish the lamp L1 (36 in Fig. 1) to indicate that the apparatus is functioning correctly. The switch 34, Fig. 1, activates the apparatus when the probe 24 is centred over a desired position of the cathode ray tube by removing earth from the capacitor C4, Fig.4. Release of switch 34 resets the multi-vibrator Q8, Q9. A coupling 101 for the fibre optic bundles and the leads to switch 34 is shown in Fig. 5. The electrical terminals 58 and the optical fibres 60 are separated in insulating bush 61 and mate respectively with sockets 64, 66 and the optical fibres 67. Springs 61 and 68 ensure close contact between the ends of the optical fibre bundles and a liquid of the same refractive index as the optical fibre bundles may be located at the join.