SU1421992A1

SU1421992A1 - Device for measuring focal distances

Info

Publication number: SU1421992A1
Application number: SU864024924A
Authority: SU
Inventors: Борис Арсентьевич Пизюта; Галина Александровна Сырова; Петр Федорович Шульженко
Original assignee: Новосибирский Институт Инженеров Геодезии,Аэрофотосъемки И Картографии
Priority date: 1986-02-20
Filing date: 1986-02-20
Publication date: 1988-09-07

Abstract

Изобретение относитс к оптическому приборостроению. Целью изобретени вл етс повышение точности измерени и автоматизации нроцесса измерени . Излучение от осветител 1 формируетс в широкий параллельный пучок, из которого посредством двухщелевой лТ,иафрагмы 5 вырезаютс два узки.х пучка. Контролируема деталь строит изображение щели коллиматора в задней фокальной плоскости. При перемещении линз 7 и 8 датчики 9 и 10 величины перемещени линз непрерывно определ ют их положение, информаци о котором поступает в цифровое устройство 15. В момент, когда след каждого из двух узких пучков устанавливаетс симметрично линии раздела фотоприемников 11 и 12, в блоке 16 записываютс отсчеты с датчиков 9 и 10. Аналогичный отсчет запоминаетс и в тот момент, когда след узкого иучка лучей становитс симметричным линии раздела фотоприемн11ков 11 и 12 при отсутствии контролируемой детали 6. Разность отсчетов дает величину перемещени линз 7 и 8, значени которых усредн ютс . 1 ил. i (ЛThis invention relates to an optical instrument. The aim of the invention is to improve the accuracy of measurement and automation of the measurement process. The radiation from illuminator 1 is formed into a wide parallel beam, from which two narrow beams are cut out by means of a double-slit LT and aphragm 5. The controlled part builds an image of the collimator slit in the back focal plane. When moving the lenses 7 and 8, the sensors 9 and 10 of the magnitude of the movement of the lenses continuously determine their position, information about which enters the digital device 15. At the moment when the track of each of the two narrow beams is set symmetrically to the line of separation of the photodetectors 11 and 12, in block 16 readings are recorded from sensors 9 and 10. A similar readout is remembered at that moment when the trace of a narrow beam of rays becomes symmetrical between the photodetectors 11 and 12, in the absence of a monitored part 6. The difference in readings gives a value of and lenses 7 and 8, the values of which are averaged. 1 il. i (L

Description

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Изобретение относитс к оптическому приборостроению.This invention relates to an optical instrument.

Целью изобретени вл етс повышение точности измерени и автоматиации процесса измерени .The aim of the invention is to improve the accuracy of measurement and automation of the measurement process.

На чертеже представлена схема устройства .The drawing shows a diagram of the device.

Устройство содержит осветитель 1, последовательно расположенные оптический блок в виде конденсатора 2, объектива 3,The device contains the illuminator 1, sequentially located optical unit in the form of a capacitor 2, lens 3,

При перемещении линз 7 и 8 датчики 9 и 10 величины перемещени линз непрерывно определ ют их положение, информаци о котором поступает в цифровое устройство 15. В момент, когда след каждого из двух узких пучков устанавливаетс симметрично линии раздела фото- приемников 11 и 12 в блоке 16, запоминаютс отсчеты с датчиков 9 и 10. Аналогичный отсчет запоминаетс и в тотWhen moving the lenses 7 and 8, the sensors 9 and 10 of the magnitude of the movement of the lenses continuously determine their position, information about which enters the digital device 15. At the moment when the track of each of the two narrow beams is set symmetrically to the dividing line of the photo receivers 11 and 12 in the block 16, counts from sensors 9 and 10 are memorized. A similar count is remembered in that

щелевой диафрагмы 4, установленной в пе- ю момент, когда след узкого пучка лучей редней фокальной плоскости объектива 3,становитс симметричным линии разделаslit diaphragm 4, installed at a time when the trace of a narrow beam of rays of the middle focal plane of lens 3, becomes symmetrical

фотоприемников 11 и 12 при отсутствии контролируемой детали 6. Разность отсчедвухщелевой диафрагмы 5, плоскость установки которой параллельна плоскости установки щелевой диафрагмы 4, контролируемую деталь 6, две положительные линзы 7 и 8, установленные в ходе излучени от двухщелевой диафрагмы 5 с возможностью перемещени в плоскости, перпендикул рной оптической оси устройства, два датчика 9 и 10 величины перемеще15photodetectors 11 and 12 in the absence of a monitored part 6. The difference from the two-slot diaphragm 5, the installation plane of which is parallel to the plane of installation of the slit diaphragm 4, the monitored part 6, two positive lenses 7 and 8, installed during radiation from the double-slot diaphragm 5 with the ability to move in the plane, perpendicular to the optical axis of the device, two sensors 9 and 10 of magnitude displacement 15

тов дает величину перемещени линз 7 и 8, значени которых усредн ютс .This gives the magnitude of the movement of the lenses 7 and 8, the values of which are averaged.

Claims

Invention Formula

A device for measuring focal lengths, containing successively PIA lenses, each of which is connected to a 20 arranged optical unit in the form of a corresponding lens, two photoreceivers of the luminaire and 11 and 12 are installed in series, each of which is mounted along the radiation path of the capacitor of a litator including a slit diaphragm lens, two electric motors 13 and 14, mu, and a lens, in front focal

the inputs of each of which are connected to the u-plane of which a slit is installed

The strokes of the respective sensors 9 and 10, 25 are the diaphragm, the double-slot diaphragm, the plane-digital device 15, the input of which is parallel to the installation of the two sensors 9 and 10 and the outputs of two photodetectors 11 and 12, the display unit 16, the input associated with the output of the digital device 15, and a digitizer 17, the input of which is associated with the output of the digital device 15.

The device works as follows.

Radiation from illuminator 1, penetrating capacitor 2 and slit diaphragm 4, lens 3 is formed into a wide parallel beam, from which two narrow parallel beams are cut through a double-slit diaphragm 5. Controlled detail 6 builds an image of a collie slit30

35

The slit diaphragm installation bone, and the measuring unit, are characterized in that, in order to increase the accuracy and automate the measurement process, the measurement unit is made in the form of two positive lenses, each of which is designed to be installed behind the object being monitored during radiation from the double-slit diaphragm. in a plane perpendicular to the optical axis of the device, two sensors measuring the magnitude of the movement of the lenses, each of which is associated with a corresponding lens, two photodetectors, each which is installed in the rear focal plane of the somator in the rear focal plane. Know 40 of the corresponding lens, two electric motors - the magnitude b of the displacement of the lenses 7 and 8, teli, the inputs of each of which are connected which is proportional to the focal distance of the outputs of the corresponding sensors to the measured part 6, the focus measurement of the magnitude of the displacement of the lenses, digital The distances of the lenses are 7 and 8 fn, .i. and the racial unit, whose input is connected with the output between the slit centers of two sensors and with the photoreceiver aperture 5, you can define 5 indication units, whose input is based on the focal length of the monitored part 6 .

It is connected with the output of the digital unit, and the digital-printing unit, whose input is connected with the output of the digital unit.

When moving the lenses 7 and 8, the sensors 9 and 10 of the magnitude of the movement of the lenses continuously determine their position, information about which enters the digital device 15. At the moment when the track of each of the two narrow beams is set symmetrically to the dividing line of the photo receivers 11 and 12 in the block 16, counts from sensors 9 and 10 are memorized. A similar count is remembered in that

15

This gives the magnitude of the movement of the lenses 7 and 8, the values of which are averaged.

Invention Formula

The slit diaphragm installation bone, and the measuring unit, are characterized in that, in order to increase the accuracy and automate the measurement process, the measurement unit is made in the form of two positive lenses, each of which is designed to be installed behind the object being monitored during radiation from the double-slit diaphragm. in a plane perpendicular to the optical axis of the device, two sensors measuring the magnitude of the movement of the lenses, each of which is associated with a corresponding lens, two photodetectors, each which are installed in the rear focal plane of the respective lens, two electric motors, the inputs of each of which are connected to the outputs of the respective sensors measuring the magnitude of the movement of the lenses, the digital unit whose input is connected to the outputs of the sensors and a display unit, the input of which is connected with the output of the digital unit, and a digital-printing unit, the input of which is connected with the output of the digital unit.