SU603939A2 - Photoelectric autocollimator - Google Patents

Description

.1 The invention relates to a measuring fiexHTiKe, namely, to the design of photoelectric autocollimators used in monitoring the angular positions of mirrors, prisms and other objects, From the main autoflot, No. 485399 known; ei Ao1oelecrical autocollimator. the illuminator with the line raster, the volume, the receiving part with the line raster, having - the central dark bar of doubled width, which is optically matched with the linear raster of the illuminator, two identical telescopic lenses, and a single-sided - a dial, and there are nine rows. one and the same value in different directions relative to the axes, - paaak 1ЗД0Х to the cheeks of the beam of rays. One of these nns is installed in the illuminator, and the other “B” of the receiving part. The main disadvantage of this autocollimator is the error due to the displacement of the energy axis of the image of the brand (line raster) relative to its geometric base. The causes of the mentioned media are different for different types 1; brand mark vignetting of the radiant flux, non-symmetry new aberrations of the optical system and the non-chic nature of the photometric properties of the mirror and the lens, Greshsennozh; W3-aa offset of the energy axis of the image of the brand relative-. but its geometrical axes may be unacceptably large. The purpose of the invention is to improve accuracy by eliminating errors due to the mixing of the energy axis of the image of the ruled raster relative to its geometrical axis. This is achieved by installing in the receiving part between the beam-splitting plate and the telescopic lens an optical block consisting of two semi-transparent ; flat-parallel plates, located under the same magnitude but different in sign angles to the optical axis of the objective, compensation flat-parallel plate, located between them, and the reflector installed in the VNR steam axis: it is equipped with a Bats valve, which is located on the nute one on the bifurcated rays.

In the drawing, are ibragevoe op-pr adka scheme of the proposed device.

Rodent device: illuminator 1, lined raster 2 illuminator, telescopic lens 3, beam-splitting flat-parallel plate 4, object 5, reflector 6, beam-splitting parallel-sided plastnvvk 7 into d-compensation .... plane-parallel paddle 10, flap 1 o, reflector 11, tsh1x skirting lens 12 # prevetod 13 ee | ee acydyz1 lvva vneychaty rvstr 14, light dividing p | zmu 15, condor sor 16, radiation 17, indicator) | j is Exit output.

The two-sided imatdr consists on the lighting and receiving parts and the reflector of the 6th element,

The illumination part contains the illuminator 1 with a piacotpoM 2 line and a telescopic core 3) set behind the raster. The receiving portion comprises about ektnv S ledovateyno with SBI-N .uST E1Vle1EShymi along its optical axes royu roerachaoy svetodeln- js tion nlastiykoy 4 las gynkama 7, 8 and 9, the optical block q ryzdaoeii ray beam, the shutter 11 and the reflector Yu this osRGEgcheskogo; unit, 1 telescopic lens 12, a drive of 13 telescopic lenses, a raster 14, a beam-splitting prism 15, condensers 16, radiation detectors 17 and an output signal indicator 18.

Light-plane plane-parallel ZZ plates 7 and 8, the commision plate 0 and the reflector 11 form an optical beam-splitting® block for working out of the image of the brand and the next image alignment:

each other at ISO, in the focal lens of the lens, the Loops 7 and 8 is located along the optical axis of the lens by non-hijackings, the same in magnitude, but equal in sign, and the reflector is parallel, 45 o the optical axis to distant & from it, providing a combination of bifurcated images of the mark in the focal plane of the lens, the Transducer can be in the form of a mirror or a prism. 50

The valve 10 is installed on the path of the beam of rays directed to the reflector, and sleep. the wife is driven to ensure her pivoting (not shown). Telescopic lens 12 is mounted directly by SS

It is located in front of the focal plane of the object and is equipped with a drive 13 for synchronous air conditioning with a telescopic lens 3 (the diagram of this drive is not shown in the drawing). Line raster 14 is installed in the focal plane of the lens.

With a 1-pin telephoto 15 prism, it touches its raster edge. In the path of the beams of rays reflected by the prism, two condensers 16 are installed, and by means of them two receivers of radiation 17. The output signal indicator 18 is connected; to both radiation receivers.

Togna of translucent plates to the reflector or their design. The reflection coefficient is chosen so that the focus of both images of the radiator is focused in the plane of radiation and equality of the fluxes of the two images.

As an optic block for razvpoenii pu; chaka rays in their subsequent combination can be ypogyy.zoyat and various sh snake blocks ..

The device works as follows

When the reflector is rotated at a certain angle relative to the zero position on the indicator 18, the curve appears, turning forward, and turning around. For an accurate measurement of the angle of rotation from {to the gate with the help of the rim gear 13, both telescopic lenses of Sv 12 are moved by one and the same magnitude until a feast until the driver has shown the signal

After the actuator has worked 13 angles, the rotation of the reflector in the EASLOIKA 1O is folded back, Bfj 6, the result of which both forked images of raster 2 are superimposed on each other in the plane of raster 14,

If the energy axis of one of the pacipa 2 razdeanzh of the images does not coincide e term1E: tr1ts with (Hide 14 raster (axis), ito er. Nikatr | © 8 descends, and yorvdo yydn1y: in the limit, the index The synchronous actuator 13 vervmezaet both telescopic lenses B and 12 until the geometrical axis of the raster 14 coincides with the geometrical axes of both bifurcated ones. RIH research institute 2. In this case, the energetic axis. raster 2, equal to the CjTMMe illumination distribution of both of its About bifurcated images, exactly coincides with the geometric raster of the raster 14.

The readout from the drum of one of the telescopic lenses at the zero signal on the indicator 18 determines the angle of rotation of the control element, and the error of the displacement of the energy axis of the image of raster 2 relative to its geometric axis at this is absent.

Claims (1)

The practical application of the proposed photoelectric autocollimator will make it possible to increase the measurement accuracy not only due to {compensating for errors due to | | Unsurpassed terrain in the image of the line raster, which are particularly significant in the case of the non-identity of photometric aspects, reflecting the object, in and due to the reduction of errors caused by inaccurately inflicted, we applied the appropriate patterns and provided the client with the appropriate forms. of the illuminator rotated through 180 images Formula image Photoelectric auto-detector for auth. St. No. 485399, I distinguish F and and C with the fact that, in order to improve accuracy by eliminating the displacement of the energy axis, the linear raster is depicted relative to its geometric OCR. in its receiving part between the jCBeToaenHTenbHoU plate and the telescopic / schnaoy, an optical unit is installed, consisting of two translucent flat-parallel plates located at equal angles, but different in sign, between the them, and a reflector installed outside the optical axis parallel to it, provided with a flap that is located in the path of one of the forked beams of rays.