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11. 发明专利

DE1563556A1 未知
公开(公告)号：DE1563556A1
公开(公告)日：1970-02-12
申请号：DE1563556
申请日：1966-05-27
申请人： MESSER GRIESHEIM GMBH
发明人： HAHN GUENTER
IPC分类号： B23Q35/128 , H01J39/12

12. 发明专利

DE1512259A1 未知
公开(公告)号：DE1512259A1
公开(公告)日：1969-08-28
申请号：DE1512259
申请日：1967-03-23
申请人： ILFORD LTD
发明人： MANKTELOW NEALE DENIS
IPC分类号： G01J1/44 , G03B7/083 , G03B9/58 , H03K17/288 , H01J39/12
摘要： 1,141,204. Relay circuits. ILFORD Ltd. 23 March, 1967 [24 March, 1966], No. 13058/66. Heading H3P. [Also in Division G2] A timing relay (Fig. 1) comprises a voltage source across which is connected in series a first fixed resistor R 1 , a second fixed resistor R 2 , and a variable third resistor R 3 , a capacitor C T being connected to the junction between R 1 and R 2 and being charged through a fourth resistor R T from the voltage developed across R 2 ; when the voltage developed across capacitor C T and resistor R 1 reaches a predetermined value V T , a discharge tube V 1 is triggered, which operates the relay. The device is of use in controlling photographic exposures, particularly in that linear adjustment of a variable resistor provides logarithmic adjustment of the timed interval. Fig. 4 shows a photometer circuit, a photoconductive cell R c being placed in the light path of a photographic printer. Resistor R p is adjusted until the peak voltage developed across cell R c is equal to the triggering voltage of tube V 1 , and then the resistor R p is used as the variable resistor R 3 in Fig. I. Fig. 7 (not shown) is a combined photometer and timing relay circuit, according to whether the coupled switches (SW1a, SW1b, SW1c) are set in the " P " (photometer) or " T " (timing) position. Initially, the circuit is set in the " P " position, and the photo-cell circuit balanced so that the discharge tube (V 2 ) conducts, and then extinguishes, at a low frequency, e.g. once or twice a second, this indicating the balanced condition. The circuit is then switched over to the " T " position, the photo-cell removed from the light path and replaced by a light-sensitive sheet, and the timed exposure initiated.

13. 发明专利

DE1900920A1 未知
公开(公告)号：DE1900920A1
公开(公告)日：1969-07-31
申请号：DE1900920
申请日：1969-01-09
申请人： IBM
发明人： FLEISHER HAROLD , JEROME HARRIS THOMAS
IPC分类号： G02F1/03 , G02F3/00 , G11C13/04 , G11C15/00 , G11C17/00 , H01J39/12
摘要： 1,199,530. Read-only stores. INTERNATIONAL BUSINESS MACHINES CORP. 3 Dec., 1968 [12 Jan., 1968], No. 57224/68. Heading G4A. [Also in Divisions G2, H1 and H4] An optical AND gate comprises an electrooptic crystal 16, such as KDP, and a transparent photocathode 14 having transparent conductive coatings 20 and 22 disposed as shown in Fig. 1 within a transparent glass envelope 12. In operation, with switch 48 closed, a light beam 42 which may contain an image, such as a photographic memory containing fields of binary bits represented by light and dark spots, is imaged on to photocathode 14, the emitted electrons from which are accelerated by the potential gradient to crystal 16 e.g. light on area 44 causes area 28 on crystal 16 to assume an electron charge thereby developing a potential across the crystal in that area. To read-out the stored electron image, switch 48 is opened, and a plane polarized light beam 26 from digital deflector 24 is scanned across the crystal 16 and directed via beam splitter 30 and analyser 32 to photo-multiplier tube 36 an output voltage being developed across resistor 38 whenever the beam 26 passes through a charged area of crystal 16 which causes the state of polarization of beam 26 to be changed. An electrical signal proportional to the intensity of beam 42 is thus obtained whenever light in area 44 coincides with light on area 28. The stored charge on crystal 16 is erased prior to the next imaging operation by using an electron flood gun 18. The read-out device may function to provide random accessing of information stored on a memory surface such as a photographic film, Fig. 2 (not shown).

14. 发明专利

DE1817259A1 未知
公开(公告)号：DE1817259A1
公开(公告)日：1969-07-24
申请号：DE1817259
申请日：1968-12-27
申请人： GEN ELECTRIC
发明人： LEE WALKER RICHARD
IPC分类号： G11B27/26 , H01J39/12
摘要： 1,252,599. Transistor switching circuit. GENERAL ELECTRIC CO. 17 Dec., 1968 [26 Dec., 1967], No. 59937/68. Heading H3T. [Also in Division G5] In a record/playback apparatus (see Division G5) the presence of a metal marker on a record is sensed by a light source and two photo-cells 28, 29 connected in a circuit to provide output signals of respective terminals 56, 60. With no marker present, equal currents I 5 , I 6 in the cells are set by potentiometer 44 and transistors 36. 37 conduct to provide zero output on terminals 56, 60. With a marker sensed by cell 28 say, transistor 37 is biased off to provide a + 3V signal at terminal 56. In a modification (Fig. 7, not shown) quiescent current through photocells (28, 29) causes transistors (82, 83) and (88 92) to conduct and provide a low positive voltage on terminals (91, 95) which are each connected to the base of one and the emitter of another transistor (89, 93) to bias these off and allow transistors (90, 94) to conduct and provide zero output on terminals (60, 56). When a marker is sensed by cell (28), the voltage at terminal (91) increases while that at terminal (95) remains unaltered thereby causing transistor (89) to conduct, bias transistor (90) off and switch + 3À6V to output terminal 60.

15. 发明专利

DE1523246A1 未知
公开(公告)号：DE1523246A1
公开(公告)日：1969-04-10
申请号：DE1523246
申请日：1966-05-05
申请人： SEQUENTIAL ELECTRONIC SYSTEMS
发明人： H MARCUS DANIEL
IPC分类号： G01D5/36 , G01P3/48 , G01P3/486 , H01J39/12
摘要： 1,106,006. Measuring position photo-electrically. SEQUENTIAL ELECTRONIC SYSTEMS, Inc. May 14, 1965 [May 14, 1964; May 10, 1965], No. 20438/65. Heading G1A. In a position or speed measuring apparatus of the type using co-operating gratings, light from some point on a measuring grating falls on two index gratings so positioned that photo-cells cooperating therewith produce signals having a predetermined phase difference. The light may be switched to fall alternately on the index gratings, but preferably is made to fall on both continuously by using a beam splitter. The phase difference may be 90 when it is desired to produce sine and cosine signals, or 180 when it is desired to connect the outputs in opposition and so remove noise and the static D. C. level by "Common-mode rejection". Both these uses may be combined in one apparatus, Fig. 6. A measuring grating 70 is fixed to a shaft 71, the angular position or speed of which is to be measured, and illuminated by a lamp 73. By means of beam splitters 77A; 77B; 77C, the lens 76 forms images the grating 70 on to index gratings 78, 78A; 74, 74A. The first splitting, by 77A, is to produce sine and cosine signals and to this end the gratings 78 and 78A are adjusted so that their position relative to the image are in quadrature relative to 74 and 74A respectively. The second splitting, by 77B and 77C is to produce signals from photo-cells 79 and 79A and from 74 and 74A that are in antiphase and may be connected to the inputs of differential amplifiers 83, 88 for common mode rejection. The beam splitters 77A, 77B, 77C, may be combined to form a single block, Fig. 7 (not shown). If the gratings are very coarse, the lens 76 may be omitted. The index gratings may be single slits.

16. 发明专利

DE1473971A1 未知
公开(公告)号：DE1473971A1
公开(公告)日：1969-04-03
申请号：DE1473971
申请日：1965-09-02
申请人： ITEK CORP
发明人： LOUIS HOBROUGH GILBERT
IPC分类号： G01C11/00 , G08C21/00 , H01J39/12 , H04N3/12
摘要： 1,114,130. Photo-electric cartographic devices. ITEK CORPORATION. 26 Aug., 1965 [4 Sept., 1964 (2)], No. 36730/65. Heading H4D. [Also in Division G1] In a photogrammetric mapping machine, registration between a pair of stereo-photographs 57a, 57b is obtained by the use of two flying spot scanner cathode-ray tubes 74a, 74b co-operating with two photo-multiplier tubes 76a, 76b, the output signals of which are fed to two viewing cathode-ray tubes 75o, 75b located in a binocular viewer, timing differences between the two signals from the photomultiplier tubes being detected by a correlation system 70 to detect parallaxes between the two photographs 57a, 576, the correlation system feeding a transformation system 71 which distorts the rasters of the two flying spot scanners 74a, 74b to allow for these parallaxes, so that the two images on the viewing cathoderay tubes 75a, 75b will be rectified, undistorted and will be a true stereo-pair. Mechanical components.-The two photographs 57a, 57b are in the form of transparencies and are mounted in two carriers movable on a plane glass plate surface the carriers being guided by two bars disposed at right-angles to one another at the edges of the plate. The glass plate is made so as to obstruct the light rays passing therethrough as little as possible and as such is too thin to be able to support itself without sagging over its entire area. To this end it is supported on a table by air pressure fed to rubber pads under the plate; apertures being provided in the region of the photographs 57a, 57b. The photograph carriers are mounted on the plate by pads fed with air pressure so as to suspend the carriers above the plate for ease of movement. The air supply can be cut off under control of the operator when the desired positions for the photographs have been reached allowing the carriers to rest on the glass plate. The image forming surfaces of the two viewing cathode-ray tubes 75a, 75b are arranged facing each other, and the images are viewed in the binocular viewer using two angularly disposed mirrors 92a, 92b reflecting these images. Raster generator.-The raster formed on each of the flying spot scanner tubes 74a, 74b and the viewing cathode-ray tubes 75a, 75b is in the form of a square generated by interlaced diagonal scanning lines in which each point within the raster is scanned four times for each frame. The frame repetition frequency is approximately 30 per second, and to achieve this a 7À5 Mc/s. crystal oscillator is used in the raster generator and the output of this oscillator is divided in the ratio of 511: 509 and these divided signals are fed to the X and Y deflection plates of the cathode-ray tubes after suitable shaping. This arrangement gives 509 lines to one diagonal and 511 to the other forming the required interlaced diagonal raster. The signals fed to the viewing cathode-ray tube deflection plates are delayed to allow for the delay incurred in processing the signals from the flying spot scanners before they reach the viewing cathode-ray tubes. Scanning system.-Scanning light beams from the flying spot tubes 74a, 74b are transmitted through the pair of stereo-photo transparencies 57a, 57b and become image modulated before reaching the photo-multiplier tubes 76a, 76b. The photo-multiplier tubes are of the dynode type and are each provided with a regulator 186a, 186b to maintain the average current output thereof constant. The signals from the photomultiplier tubes are fed to the viewing cathode-ray tubes by way of two video processing circuits 69a, 69b, which function as an automatic gain control to enhance the video images seen by the operator but these circuits also include edge enhancing networks and, if desired, a signal inverter which enables negative transparencies 57a, 57b to be used, these giving positive images on the viewing cathode-ray tubes. A pair of screen noise feedback control assemblies comprising photo-multiplier tubes 188a, 188b and amplifiers 189a, 189b are also provided to maintain a uniform light intensity from point to point in the faces of the scanning cathode-ray tubes. Correlation system 70.-The purpose of this system is to detect timing differences in the image-modulated signals from the photomultiplier tubes, and thus develop registration error signals which are then used to distort the scanning rasters of the tubes 74a, 74b to remove these registration errors on the images formed on the viewing cathode-ray tubes 75a, 75b. The system 70 comprises five similar systems each arranged by use of filter networks, to detect signals in different frequency ranges. Each of these systems comprises a series of detector modules each including an exclusive OR gate fed with an appropriate signal from one of the video processors 69a, 69b, and with a corresponding reference signal from the raster generator 68. The signals fed to each of the gates are processed to enable the gates to give distinguishing outputs to detect one of ten first or second order transparency distortions or of registration displacement between the two transparencies defined in the Specification. The signals corresponding to each of these errors are fed to the transformation unit 71. Transformation unit 71.-This unit is fed with error signals developed in the correlation unit 70 and also with reference signals from the raster generator 68. The unit comprises a series of modulator circuits coupled to adding points to enable the error signals developed in response to each of the detected registration errors to be added to give four composite output signals which may be fed to the X and Y deflection plates of the scanning tubes 74a, 74b to distort the rasters generated thereon so that the signals fed to the viewing cathode-ray tubes 75a, 75b will be free from such errors. It is also stated in the Specification that if desired the rasters of the viewing cathode-ray tubes may be distorted to allow for these errors, but it is preferred to use the above-described arrangement in order that the square shape of the rasters on the viewing cathode-ray tubes may be preserved.

17. 发明专利

DE1264606B 未知
公开(公告)号：DE1264606B
公开(公告)日：1968-03-28
申请号：DES0101730
申请日：1966-01-31
申请人： SIEMENS AG
发明人： BAYATI DR ABUTORAB , PEISER DR RUDOLF , SCHEFTER DIPL-ING LOTHAR
IPC分类号： G01R15/22 , H02H1/00 , H01J39/12

18. 发明专利

DE1244380B 未知
公开(公告)号：DE1244380B
公开(公告)日：1967-07-13
申请号：DEW0036909
申请日：1964-06-02
申请人： WINDMOELLER & HOELSCHER
发明人： SCHNEIDER HORST
IPC分类号： B29C65/18 , B31B23/00 , B31B70/00 , B31B155/00 , B31B160/10 , H01J39/12

19. 发明专利

CA1104258A CONTROL CIRCUIT 未知
公开(公告)号：CA1104258A
公开(公告)日：1981-06-30
申请号：CA287779
申请日：1977-09-29
申请人： RECOGNITION EQUIPMENT INC
发明人： MCWATERS LYNN D
IPC分类号： G06K7/00 , G06K7/10 , G06K9/00 , G06K9/03 , G06K9/22 , G06T7/00 , H01J39/12
摘要： CONTROL CIRCUIT Disclosed is a control circuit used to conserve power in a portable optical recognition system. When the system is not being used or between actual scans of the reading electronics, power is supplied only to those circuits required to control power to the system and to permit sequence reading of items. An infrared signal is emitted from the reading device and when a document or other item to be read is scanned the infrared signal is reflected back into the scan unit and is detected, thereby sensing that a document is being read and turning the system on.

20. 发明专利

CA1101941A TWO-TERMINAL PHOTODETECTORS WITH INHERENT AC AMPLIFICATION PROPERTIES 未知
公开(公告)号：CA1101941A
公开(公告)日：1981-05-26
申请号：CA290065
申请日：1977-11-02
申请人： ELECTRONICS CORP AMERICA
发明人： THOMSON ELIHU C
IPC分类号： H01L31/02 , H03F3/08 , H04B10/06 , H01J39/12
摘要： A two-terminal photodetector comprising a photodiode and a plurality of active and passive components connected so that when connected to a source of current the voltage across the terminals is proportional to the illumination and is proportional by an amplification factor to rapidly changing illumination levels. In one embodiment the photodetector includes a first transistor having the photodiode connected in the emitter base circuit and a feedback resistor connected in the base collector circuit. This transistor is biased such that it is nearly saturated. Illumination on the photodiode causes the collector voltage to rise correspondingly. An output transistor is connected with its base joined to the emitter of the first transistor and a voltage divider connected between its emitter and collector. The output transistor has only a unity gain for low frequency signals but the gain is considerably increased for high frequency signals corresponding to rapidly changing illumination.

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