• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A method is provided for measuring light transmission through a continuous sheet having an aperture pattern thereon. A light source is positioned on one side of the sheet and a light sensor is positioned on the opposite side of the sheet. The improvement comprises bypassing a portion of the light from the light source around the sheet to the sensor. The bypassed light is used to update the calibration of the measurements.
    公开号:SU1327801A3
    申请号:SU802894293
    申请日:1980-03-07
    公开日:1987-07-30
    发明作者:Джозеф Маддокс Вильям
    申请人:Рка Корпорейшн (Фирма)；
    IPC主号:
    专利说明:

    eleven
    The invention relates to photometry, in particular to photometric instruments for testing sheet materials with holes.
    The purpose of the invention is to improve measurement accuracy.
    The drawing shows a diagram of the proposed device.
    . The device comprises a light source 1, optically coupled to a photodetector 2 through a fiber light guide 3, as well as a flap 4 mounted for movement behind the light source 1, the subtraction unit 5 to the same input of which the storage unit 6 is connected. The device also contains a sample and hold unit 7, a switch 8, an additional storage unit 9, a division unit 10 and a scale unit 11, the input of which is connected to the output of the division unit 10, one output of which is connected to the output of the additional storage unit 9 and to the second input A subtracting unit 5, whose stroke 1 is connected to the second input of the dividing unit 10, the output of the photodetector 2 connected to the input of the sampling and holding unit 7, the output of which through the switch 8 is connected to the inputs of the storage units 6 and 9. A monitored sheet 12 is moving in front of the photodetector 2.
    The device works as follows.
    Before starting operation, the system is calibrated without sheet 12, while the flap 4 is rotated so that light only enters the photoreceiver 2 through the fiber light conduit 3. The output signal of the photoreceiver 2 is fixed. After that, the flap 4 is removed and the signal of the photodetector 2 is fixed, to which in this case the light flux through the fiber light guide 3 and the light flux directly from the source 1 of light fall. The resulting value of the signal is divided by the value of the signal recorded before. The result of the division is the scale scale of the scale block 11. After setting this factor, the device is ready for operation.
    Part of the controlled metal sheet 12 has no holes. When this part is located in front of the photodetector 2, the luminous flux enters it only through the fibers 278012
    The light conductor 3. The signal FOL of the photodetector 2 corresponding to this light flux is transmitted through the sample and hold unit 7 and the switch 8 to the additional storage unit 9.
    When moving a sheet 12 with holes through which part of the luminous flux enters the photoreceiver 10 nickname 2, the output signal of the photodetector 2 is equal to the sum of the FOL signals corresponding to the luminous flux at the output of the fiber light guide 3 and MTL, 15 corresponding to the luminous flux transmitted through the holes in the sheet 12. The sum of these FOL + MTL signals is likewise transmitted to storage unit 6. In subtraction unit 5, the difference in signals at the outputs of the storage units 6 and 9 is determined, i.e. FOL + MTL - FOL G1.
    In division block 10, the MTL / FOL signal ratio is determined. After
    25 of which the quotient in the scale unit 11 is multiplied by the factor K and the value T of the transmission of light by the holes in the sheet 12 is obtained,
    Thus, the proposed invention, regardless of the drift of the components of the device, allows to preserve the accuracy of measurements of the amount of light transmission,
    权利要求:
    Claims (1)
    [1]
    25 claims
    A device for measuring light transmission, comprising a light source optically coupled to a photoreceiver.
    40 through a fiber light guide, as well as a flap mounted for movement in front of the photoconductor unit, a subtraction unit, to one input of which a storage unit is connected, which is characterized by the fact that, in order to improve the measurement accuracy, a sampling unit and a hold switch, a switch, additional storage unit, dividing unit and. large scale
    50 block, the input of which is connected to the output of the division unit, one input of which is connected to the output of the additional storage unit and to the second input of the subtraction unit, the output of which is connected to the second input of the division unit, and the output of the photodetector is connected to the input of the sample and hold block, which through the switch is connected to the inputs of the storage units.
    L, 1
    Compiled by A. Churbakov Editor Yu “Sereda Tekhred L. Serdyukova Proofreader T. Kolb
    Order 3396/59
    Circulation 776 Subscription
    VNIIPI USSR State Committee
    for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5
    Production and printing enterprise, Uzhgorod, st. Project, 4
    类似技术:
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    同族专利:
    公开号 | 公开日
    FI800645A|1980-09-10|
    US4289406A|1981-09-15|
    JPS6058416B2|1985-12-19|
    FI70749B|1986-06-26|
    JPS55121131A|1980-09-18|
    FI70749C|1986-10-06|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE1939034C2|1969-07-31|1971-01-28|Bio Cal Instr Gmbh|Photometer for making measurements at different wavelengths|
    DE2211073A1|1972-03-08|1973-09-13|Bosch Gmbh Robert|HAIR MONITORING DEVICE|
    US3808067A|1972-11-24|1974-04-30|Western Electric Co|Method of controlling an etching process|
    US4099607A|1977-02-04|1978-07-11|Gte Sylvania Incorporated|Aperture mask conveyor and inspection system|
    US4126510A|1977-10-06|1978-11-21|Rca Corporation|Etching a succession of articles from a strip of sheet metal|JPS6233789B2|1981-09-18|1987-07-22|Fuji Photo Film Co Ltd|
    US4400233A|1982-11-12|1983-08-23|Rca Corporation|System and method for controlling an etch line|
    JPS59107242A|1982-12-11|1984-06-21|Dainippon Screen Mfg Co Ltd|Device for measuring blackened amount of film|
    US4556902A|1984-01-19|1985-12-03|Rca Corporation|System and method for measuring the area and dimensions of apertures in an opaque medium|
    US4662757A|1984-05-18|1987-05-05|Rca Corporation|Motion tracking system and method|
    US4641256A|1984-12-04|1987-02-03|Rca Corporation|System and method for measuring energy transmission through a moving aperture pattern|
    GB9014407D0|1990-06-28|1990-08-22|Ncr Co|Document sensing apparatus|
    DE4130677C2|1991-09-14|1995-11-23|Roland Man Druckmasch|Device for photoelectric monitoring of the run of webs in rotary printing machines|
    US5625196A|1995-05-30|1997-04-29|Abb Industrial Systems, Inc.|Method and apparatus for monitoring/calibrating a process measuring system|
    US7411603B2|2005-03-29|2008-08-12|Hewlett-Packard Development Company, L.P.|Light guide|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US06/018,909|US4289406A|1979-03-09|1979-03-09|Light transmission measurement method|
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