SU787894A1

SU787894A1 - Optronic angle meter

Info

Publication number: SU787894A1
Application number: SU782643671A
Authority: SU
Inventors: Константин Михайлович Константинович; Валентина Николаевна Лурье; Людмила Ивановна Ульянова; Михаил Васильевич Хорошев
Original assignee: Московский институт инженеров геодезии, аэрофотосъемки и картографии
Priority date: 1978-07-10
Filing date: 1978-07-10
Publication date: 1980-12-15

Description

Изобретение относитс к контрольноизмерительной технике и может быть использовано, в частности дл высоко точных измерений угловых и линейных j величин в геодезии, строительстве, машиностроении и других смежных с ними отрасл х науки и техники.The invention relates to reference measurement technology and can be used, in particular, for highly accurate measurements of angular and linear j values in geodesy, construction, engineering and other fields of science and technology adjacent to them.

Известен фотоэлектронный угломер, содержащий последовательно располо- Q женные приемный объектив, блок анализирующих элементов и фотоприемник .A photoelectric protractor is known, which contains successively located Q receiving lens, a block of analyzing elements and a photodetector.

Недостатком данного угломера вл етс недостаточно высока точность измерени .UThe disadvantage of this protractor is that the measurement accuracy is not high enough. U

Цель изобретени - повышение точности измерени .The purpose of the invention is to improve the measurement accuracy.

Это достигаетс тем, что фотоэлектронный угломер снабжен зеркалом, расположенным под острым углом к ОПТИ- .jQ ческой оси приемного объектива на рассто нии от нее не более частного от делени длины волны излучени , падающего на приемный объектив, на погрешность измерени угломера, и полу-25 прозрачной пластиной, установленной на оптической оси приемного объектива параллельно зеркалу.This is achieved by the fact that the photoelectric protractor is provided with a mirror located at an acute angle to the OPTIV axis of the receiving lens at a distance from it no more than a partial distance from the division of the wavelength of the radiation incident to the receiving lens, to the measurement error of the protractor, and 25 transparent plate mounted on the optical axis of the receiving lens parallel to the mirror.

На чертеже изображена принципиальна схема фотоэлектронного угломера.JQThe drawing shows a schematic diagram of a photoelectric goniometer. JQ

Фотоэлектронный угломер содержит последовательно расположенные приемный объектив 1, блок анализирующих элементов, включакжций призму-анали ,затор 2, зеркальные конденсаторы 3 и 4 и радиальный растр 5, фотоприемник 6, зеркало -, расположенное под острым углом р к оптической оси О-О приемного объектива 1 на рассто нии D от нее, полупрозрачную пластину 8, установленную на оптической оси О-О приемного объектива параллельно зеркалу 7.The photoelectric protractor contains successively located receiving lens 1, a block of analyzing elements, including prism-analysis, mash 2, mirror capacitors 3 and 4 and radial raster 5, photodetector 6, mirror - located at an acute angle p to the optical axis O-O of the receiving lens 1 at a distance D from it, a translucent plate 8 mounted on the optical axis O-O of the receiving lens parallel to the mirror 7.

Фотоэлектронный угломер работает следующим образом.Photoelectric protractor works as follows.

Claims

The radiation of a coherent radiation source, for example a laser (not shown in the drawing), located at a sufficient distance, hits the mirror 7 and into the receiving lens 1. On the translucent mirror 8, the beams are connected and interfered. In the plane of the separating edge of the prism-analyzer 2, an image of the radiation source is built, which through mirror condensers 3 and 4, having passed the radial raster 5, falls on the photodetector 6. The image of the radiation source in the absence of an angular mismatch is divided by two halves and the raster 5 alternately directs the radiation from each part of the image to the photodetector 6. Due to the fact that coherent beams are combined on a translucent mirror 8, the image has the form of alternating maxima and minima. When the radiation source is shifted, the interference bands move faster than the image itself intact, the energy balance in the analysis channels is disturbed and the electrical signal at the output of the protractor appears faster than in a conventional photoelectron protractor. In order to fully use the metrological capabilities of the photoelectron protractor between the interacting parts of the wave front is chosen according to the inequality I - the wavelength of the radiation incident on the receiving lens l about - error measured rhenium protractor. The proposed protractor can be simply matched with a large class of angle-measuring devices, while providing an increase in measurement accuracy by more than an order of magnitude. An inventive photoelectric protractor containing successively located receiving lens, a block of analyzing elements and a photodetector, characterized in that, in order to improve the measurement accuracy, it is equipped with a mirror located at an acute angle to the optical axis of the receiving lens at a distance not more than specific to it dividing the radiation wavelength of the incident on the receiving lens, the measurement error of the protractor, and a translucent plate mounted on the optical axis of the receiving lens parallel to rkalu. Sources of information taken into account in the examination 1. S. Eliseev, V. Yakushenkov and others. The study of high-precision optical-electronic systems. - Lime j Universities. Surveying and aerial photography. 1968, ed. 5, s. 125 (prototype).