SU1283573A1 - Method of determining dynamic characteristics of automatic collimator - Google Patents

Abstract

The invention relates to: optical instrument making and allows to expand the range of determined characteristics. The luminous flux 2 from the autosplinator 1 is fed alternately to the reflecting surfaces 3 and 4. The fixed surface 3 is the base, and the surface 4 is exposed relative to it by screws 5 and 6 at a predetermined angle. In statics, the tape of the recorder 1I measures the levels of the output signals corresponding to the position of each of the planes 3,4 when the opening 10 of the modulator disk 7 is aligned with it. The light flux is modulated alternately by directing it through the aperture 10 on the Z 4 plane. Then the modulation frequency is increased by increasing the speed of the disk /, fixing the frequency at which the output signal amplitude corresponding to the limiting transmission frequency of the autocollimator decreases at a given angle. Measurements dp of determining the limiting values of frequencies in a certain angular diagonal are made. 2 hp f-ly, I silt, about S cl

Description

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The invention relates to optical instrumentation and can be used when working with various automatic angle measuring instruments.

The aim of the invention is to improve the accuracy of measurement and expand the range of measurement of dynamic characteristics.

The drawing shows a device for implementing the proposed method, which shows the luminous flux 2 emerging from the autocollimator 1, the fixed reflecting surface 3 and the movable reflective super-top 4 with adjusting screws 5 and 6 ,, modulator disk 7 mounted on the engine axis 8 9 and having a hole 10, two-channel recorder P.

The device that implements the method works as follows.

The light flux 2 coming out of the autocollimator 1 is alternately applied to two autonomous reflecting surfaces 3 and 4, with fixed surface 3 being chosen as the basic one. Reflecting surface 4 can be rotated around the horizontal and vertical axes using screws 5 and 6 for placing it onto the specified angles with respect to surface 3. Surfaces 3 and 4 are arranged around the circumference of the opening 10 of the disk 7 of the modulator fixed to the axis 8 of the engine 9. I connect a two-channel recorder 11 dp reg to the output of the autocollimator stration output signals in the horizontal and vertical planes amplitude of the output electrical sinalov autocollimator proportional to the angle of rotation of each of the reflecting surfaces.

First, the statics determine the values of the specified angles in the horizontal and vertical planes according to the scales of the investigated autocollimator 1. At the same time, the levels of H) input signals corresponding to the position of each of the reflecting surfaces 3 and 4 are measured on the tape of the recorder 1 1 Disk 7 of the modulator with the engine off 9 by turning the disk by hand.

Initially, the reflective surfaces 3 and 4 are horizontal.

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NOS and vertical planes at an angle of 16 angles with. The light flux is then modulated by rotating the modulator disk and alternately aligning the aperture 10 with the reflective surfaces 3 and 4; the frequency of modulation is increased by increasing the speed of rotation of the disk with the help of an increase in the supply voltage of the modulator. At given angles in the horizontal and vertical planes of 16 angles, the autocollimator is examined at frequencies from 4 Hz and above. On the tape, the recorder records that at a frequency of 10 Hz the amplitude of the output signals decreases. Consequently, the modulation frequency has reached the limit level corresponding to the limit frequency of the autocollimator at given angles in the horizontal and vertical planes of 16 angles.

Then, the angles are changed in increments of 15 angular degrees by adjusting the reflecting surface 4 by adjusting screws 5 and 6 in the horizontal and vertical planes, and the measurement cycle dp is used to determine the limiting values of frequencies in a given angular range. .

Claims (1)

1. A method for determining the dynamic characteristics of an automatic autocollimator, consisting in defining and measuring the angle and determining its measurement time, characterized in that, in order to expand the range of the determined characteristics, the luminous flux is alternately supplied to two reflecting surfaces, one of which is base, and a friend is set relative to it at a given angle, measure statically the levels of electrical output signals corresponding to the position of each of the reflecting surfaces modulated luminous flux by alternately applying it to the indicated surfaces, increasing the modulation frequency and fixing the modulation frequency at which the amplitude of the output signal decreases, corresponding to the limiting transmission frequency of the autocollimator at a given angle. 3 12835734 2, The method according to claim 1, distinguish-3. The method according to claim 1, which differs from the fact that discretely measuring and y and the fact that the angles between the values of the specified angle and the defining surfaces define one or many times the measurement cycle, temporarily in the horizontal and vertical direction The limiting values of the hour-.5 channel planes, the one in a given range of angles, are given.