SU1213347A1 - Photoelectric autocollimator - Google Patents

Abstract

This invention relates to a measurement technique. To reduce the size of photoelectric autocollimators, the optical collimating system is made in the form of two glued gradient light fibers. The radiation is introduced into the fiber 2 through the transparent window 4 and, having reflected from the luminous coating 3, propagates along the optical axis of the fiber 2, which emerges from the parallel beam and enters the reflector 9 associated with the object. When the object is rotated by the angle oi, the reflected luminous flux changes its direction by an angle of 2 oi. The angular rotation of the object is transformed into a linear displacement of the laser in the focal plane of the gradient, and the photodetector 8 generates an electrical signal proportional to the angle of rotation. 1 il. (L

Description

one

The invention relates to a measuring technique, namely, angle measuring devices, and can be used to automatically register the turning angles of an object,

The purpose of the invention is to reduce the size of the a; coloclimator.

The drawing shows the optical scheme of the photoelectric autocollimator.

The photoelectric autocollimator contains the gluing of optical fibers 1 and 2, made in the form of gradans. The fibers are cut and glued at an angle of 45. A luminous coating 3 is applied to the light diameter of the fiber 2 along the cutting plane. On the side surface of the fiber 1 there is an optical window 4. The emitter 5 is located in the lighting system 6, which is located outside the fiber, and is optically matched with a beam-splitting M coating 3. Behind the end 7 of the fiber 2 there is a photodetector 8. Sensitive area, the photoreceiver shafts 8 are optically matched with the optical fiber. Reflector 9, .ccd with object: ohm, angular turns s OTOporo change .p gots.

The work of the photoelectric autocollimator is based on the properties of the gra - - is given to focus the radiation in characteristic planes and is as follows:

When the photovoltaic collector is turned on, the emitter 5 focuses the light flux in the focus of a gradant lying on the plane of the fiber cut. The radiation from the illumination system 6 is introduced into the fiber 1 through the translucent window 4. Reflected from the radiation-diverting beam 3, the radiation propagates along the optical axis of the fiber 1 and leaves it pa pa. R beam Then the radiation enters the reflector 9 associated with the object. When the normal to the reflector 9 coincides with the axis of the parallel beam, the radiation reflects from the reflector 9 at a zero angle to the nor-Mali reflector and enters the optical fiber 1, which passes through, is assembled in the focal section of the plane. Circulation 671. Subscription ShSh Patent, Uzhgorod, Projecto st., 4

47

Yushi with rear torda 7 fiber 2, Pass through the center of the fiber, the radiation enters the photodetector 8, which registers the zero signal (p. 0).

If the object is rotated by the angle L, then the parallel luminous flux emerging from the optical fiber, after reflection from the pencils 9, changes its direction by angle 2 and. As a result of such a zerous reversal, the light flux is focused at the output end of the fiber 2 in the focal plane at a distance I from the fiber axis

 1 f 2 and, o

Angular rotation of the object is formed in the linear displacement of the beam in the focal plane of the gradant. The radiation enters the photodetector, which produces an electrical signal proportional to the angle c6.

Perform collimating optical system in the form of glued; t; in an odd fashion, two gradient light fibers reduce the overall dimensions of the photoelectric autocollimator.

 3 Ормула and 3 о брэти н .и

Photoelectric autocollimator, (.a supporting emitter, a collimatorum optical system with a beam splitter and photodetectors, a DJ t; and a) so that, in order to reduce the size of the aptocolly 1 oracle, the collimated optical system is designed as a gradient optical fiber (gradan) consisting of two

Opt -GH-connected parts, angle

. o section between kotor.s is equal to 45, with

ends of the normal to its optical axis, on one of the parts of the circle in the plane of the section on. carried the beam-splitting coating; in the lateral surface of the fiber is a VSE transparent window, through which the transmitter is optically connected to the beam-splitting coating, and the photodetector is installed opposite the output fiber end.

Claims (1)

Claim A photoelectric autocollimator comprising an emitter collimating an optical system 35 with a beam splitter and a photodetector, characterized in that, in order to reduce (dimensions of the autocollimator, a collimating optical system is made 49 in the form of a gradient optical fiber (gradan), consisting of two optically connected parts, the separation angle between which is 45, with the ends located normally to 45 of its optical axis, a beam splitting coating is applied to one of the fiber parts in the interface plane, a transparent window is made in the side surface of the fiber through which 50 emitter. optically coupled to beam-splitting coating, and a photodetector mounted opposite one ¹ The output end of the fiber. VNIIIPI Order 774/5 Circulation 671. Subscribed Branch of ShSh Patent, Uzhgorod, Project 4,