SU59835A1 - Optical wedge angle measurement device - Google Patents

Description

On existing collimators used to measure the angles of optical wedges, it is possible to measure a curve with a buoyant angle of up to 1 ° with an accuracy of the order of hp. With a large wedge, autocollimation marks are placed on the edge of the field of view, and at an angle of more than 1 °, one of the marks completely drops out of observation. In the first case, measurement is possible with low accuracy, since the determination of the fraction of the division along the edge of the field of view cannot be done with sufficient accuracy; in the second case, the change in angle is completely impossible.

Therefore, the task of eliminating indicated deficiencies and building such a collimator, by means of which they could, on the one hand, improve the accuracy of measurements and, on the other hand, increase the limit value of the measured wedge angle, is very important.

The present invention aims at resolving the aforementioned task and consists in using a known split lens in the collimator, both halves of which move in a direction perpendicular to the optical axis.

the instrument tubes, and are aligned by the angle of the wedge (or, more precisely, by an amount equal to 2Ai / v, where n is the refractive index of the glass.

The author points out that the proposed device will measure a wedge with a refracting angle of up to 3 ° (with an accuracy of the order). In FIG. 1 shows a general perspective view of the device; FIG. 2 and 3 - VI1D, in two projections of the lens housing; FIG. 4 is a section along the line AB and FIG. 2

As can be seen from FIG. 2-4, the lens consists of two lenses 4 and 5 (lens flint 4 and a lens of crowns 5) located in the frame 6 placed inside the hous- ing 2, which is fixed to the tube by means of a flange 1 located on its lid 3 collimator. Each of the lens halves is provided with a screw 9 (respectively, 9,), which serves to move it in a direction perpendicular to the optical axis of the device. There are guide pins 7 and 7 on the opposite sides of the screws 9 and 9i, with springs 8.

Each half of the lens produces two images of the mark and, moving any of these half to half the distance between the autocollimation

marks, you can get a match marks from the first and second surface of the center floor. A change in the refractive angle of the wedge creates a discrepancy between autocollimation marks, which is the basis of this measurement method. Structurally, the cutting of vol. assets is made so that when combining autocollimated strokes from a mirror, one stroke serves as a continuation of the other. The position of the marks in the center of the floor and their vertical application greatly increases the accuracy of measurement.

The subject of inventing and.

A device for measuring the angles of optical wedges, fitted with an autocollimation tube located above the stage, is distinguished; and with the fact that the lens of the autocollimation tube is made “in the form of an optical compensator cut into two halves, in order to read the measured value of the wedge angle by the mutual displacement of the compensator rims when combined in the zero view of the autocollimation stroke images from both wedge surfaces.

FigZ Figure 4