SU539288A1 - Opto-electronic measuring device - Google Patents

Description

one

The invention relates to the field of optoelectronic autocollimation devices for measuring small angular displacements.

Autocollimation devices are known for measuring the angular displacement of a test object around one or two axes perpendicular to the optical axis of the autocollimator. To measure the movement of the object under test around the optical axis of the autocollimator (twist) with these instruments, it is necessary to set them with the optical axis perpendicular to the axis, the movement around which is measured. This is not always possible under the terms of the mutual placement of the monitored object and the measuring autocollimator.

It is also known an optoelectronic measuring device for measuring the angle of rotation of a monitored object in a plane perpendicular to the optical axis of the device, containing a reflector mounted on the monitored object and a two-channel photoelectric tracking measuring system with an analyzer, made in the form of two prism blades located in the focal plane of the lens on either side of the illuminator aperture (1).

A disadvantage of this device is its structural complexity due to the presence of

two autocollimation optical systems.

To simplify the construction in the proposed device, the lens is made common to both channels, and the reflector is made in the form of a prism with an angle between the reflecting faces different from 90 °.

The drawing shows a schematic diagram of the recording of an io device consisting of reflector 1, collimating lens 2, diaphragm 3, illuminator 4, prism prisms 5 of the analyzer, photo detectors 6 of the analyzer and conversion amplifier units 7.

The device works as follows.

Aperture 3, located in the focal plane of the autocollimator, with illuminator 4 behind it, is a radiator of a collimated lens 2 of the light flux. The luminous flux from lens 2 enters the reference emitting element of the prism 1 located on the object, the twist of which relative to the optical axis of the autocollimator must be measured, since the angle between the reflecting edges of the prism differs from 90 ° by 2a, the luminous flux reflected by the prism is not parallel to the collimated light flux and forms in the focal plane of the autocollimator two images of the radiating area of the diaphragm 3.

3

Since there is an analyzer in the focal plane of the autocollimator, consisting of two prism knives 5, photonary lenses 6 and amplifying and converting blocks 7, the luminous flux, reflecting from the corresponding prism blades 5, is fed to the photodetectors 6 with amplification - converter units 7, in which an electrical signal is produced corresponding to the magnitude and direction of the measured angle is twisted p.

Claims (1)

An optical-electronic measuring device for measuring the angle of rotation of a controlled object in a plane perpendicular to the optical axis of the device, containing a reflector mounted on the object being monitored, and a two-channel photoelectric tracking measuring system with an analyzer made in the form of two prisms. knives located in the focal plane of the lens on both sides of the illuminator aperture, characterized in that, in order to simplify the design, the lens is made common to both channels The reflector is made in the form of a prism with an angle between the reflecting faces different from 90 °. The source of information taken into account in the examination: 1. Auth. St. № 322613, M., Cl. G 02B 27/30, 1971 (prototype).