RU1778519C - Method and apparatus for measuring angular motions of faraway object - Google Patents

Abstract

The invention relates to a measurement technique and can be used to remotely measure the angular displacements of an object. The purpose of the invention is to increase accuracy by forming a telecentric beam. The radiation source 1 and the lens 3 create an optical beam that covers the zone of possible angular and linear movements of the control element. An aperture diaphragm 5, placed in the focal plane F2 of the lens 6, forms a telecentric beam. The lens 6 focuses on the surface of the mirror 7 with code marks a light beam limited by the image size of the aperture diaphragm 4. The reflected beam from the control element returns to the aperture diaphragm 4 with the spatial coordinates coded by the code marks of the mirror 7. Aperture aperture 4. is placed in the focal plane FI of lens 3 , forms a reflected telecentric beam. Lens 3, using a beam splitter 2, focuses the reflected telecentric beam and creates an image of the code marks of the mirror 7 on the surface of the coordinate-sensitive photodetector 8. The signal from the output of the radiation receiver 8 is fed to the input of the information processing unit 9, which provides information about the angular position of the object. 2 s.p. f-ly, 1 ill. Yo

Description

The invention relates to a measurement technique and can be used to remotely measure the angular displacements of an object.

The purpose of the invention is to increase accuracy by forming a telecentric beam.

The drawing shows a block diagram of a device.

The device consists of optically coupled radiation source 1, a beam splitter 2, a first lens 3, aperture

apertures 4 and 5, the second lens 6, mirror 7 with code marks, coordinate-sensitive photodetector 8, information processing unit 9.

The device operates as follows.

The radiation source 1 and the lens 3 create an optical beam that covers the zone of possible angular and linear movements of the control element. An aperture diaphragm 5, placed in the focal plane F2 of lens b, forms a telecentric beam.

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The lens 6 focuses on the surface of the mirror with code marks 7 a light beam limited by the image size of the aperture diaphragm 4. The reflected beam from the control element returns to the aperture diaphragm 4 with spatial coordinates encoded by the code marks of the mirror 7.

An aperture diaphragm 4, placed in the focal plane FI of the lens 3, forms a reflected telecentric beam.

Lens 3, using a beam splitter 2, focuses the reflected telecentric beam and creates an image of the code marks of the mirror 7 on the surface of the coordinate-sensitive photodetector 8. The signal from the output of the radiation receiver 8 is fed to the input of the information processing unit 9, which provides information about the angular position of the object.

Claims (2)

SUMMARY OF THE INVENTION 1. A method for measuring the angular displacements of a distant object, the method being as follows. that they irradiate a mirror mechanically coupled to an object with a focused beam, encode the radiation in intensity depending on the position of the focused beam on the mirror, focus the beam reflected by the mirror, the coordinates of the focused reflected beam are measured, the coordinates of the focused beam on the mirror are determined by the focused reflected beam, and the angular position of the object is judged by the ratio of the coordinates of the focused beam on the mirror and the coordinates of the focused reflected beam, characterized in that, in order to increase accuracy, a teccentric beam is formed before irradiating the mirror and focusing the reflected beam. 2. A device for measuring angular moving a distant object, comprising an optically coupled radiation source, a beam splitter, a lens and a code mark mirror intended for mechanical communication with the object, a coordinate-sensitive photodetector connected optically to the mirror through a beam splitter and a lens, a second lens, located in front of the mirror from the side of the first lens and mechanically connected to a mirror, characterized in that, in order to increase accuracy, it is equipped with two aperture apertures mounted respectively in the focal plane first and second lenses.