SU1415056A1 - Device for measuring prism angles - Google Patents

Abstract

This invention relates to a measurement technique. The aim of the invention is to improve the measurement accuracy by using an angular measure of 360. Place the controlled prism 7 on the table 3, mounted with the possibility of rotation. and mirror 6 on platform 5, which is located coaxially with the table. The platform is installed with the possibility of independent rotation relative to the table and, together with it, Expose one of the edges of the prism, forming a controlled angle, on a mirror perpendicular to the axis of the autocollimator. Successively turn the platform 5 together with the table 3 by the magnitude of the measured angle of the prism 7, each time returning the table to its original position. The discrete rotation of the platform is carried out until mirror 6. on platform 5 makes one complete turn, which is then used as an angular measure in determining the angle of the controlled prism. 7 il. with S (L

Description

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The invention relates to measurement technology and can be used to measure the angles of optical

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The purpose of the invention is to increase the measurement accuracy due to the use of an angular measure equal to 360. I Fig. 1 is a schematic diagram of the device; 2 to 7 are diagrams illustrating the measurement process of the proposed device.

The device contains a base 1, an autocollimator 2 mounted on the base 1, a table 3 designed for mounting a controlled prism on it, a shaft 4 for placing the table 3, a platform 5 coaxially located with the table 3, and a mirror 6 installed on platform 5.

The controlled prism 7 is located on the table 3. oi -Controlled. the prism angle is 60.

The device works as follows.

By turning the table 3, the AC side of the controlled prism 7 is set perpendicular to the beam of the autocollimator 2, until the image of the mark formed by the beam reflected from the AC face coincides with the zero mark of the reference scale of the autocollimator 2. Then, by turning the platform 5, the mark image formed by the beam reflected from the mirror 6 also coincided with the zero mark of the reference scale of the autocollimator 2. In this position (Fig. 1), table 3 and platform 5 are fixed between them. Rotate them with jointly through an angle of 180 -oi, e.g., counterclockwise (Figure 2). at the same time, the beam reflected from the face of the AV prism 7 should fall on the zero mark of the reference scale of the autocollimator 2. The fixation between table 3 and platform 5 is removed. The table 3 is returned to its original position, again aligning the image of the mark generated by the beam from zero mark reference scale (fig.Z), then re-fix the table 3 and the platform 5 among themselves. Re-rotate the table

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3 and the platform 5 at an angle of 180 ° -ot in the same direction (figure 4). In this case, the total angle of rotation of the platform 5 is 2 (180-o (,). The fixing between table 3 and platform 5 is removed, table 3 again is returned to its initial position by turning it at an angle equal to (580 -oi) clockwise (FIG. .3). /) Then again fix platform 5 and table 3 among themselves. The third time they are rotated together (Fig. 6) until a mark is formed on the image formed by a beam reflected from the mirror 6 with the zero mark of the reference scale of the autocollimator 2. The rotation angle of the platform 5 is equal to 360. The fixation between platform 5 and table 3 is removed. Mirror 6 is retracted from the optical axis of the autocollimator 2 by rotating the platform 5. Using the reading device of the autocollimator 2, the angular deviation (J) of the image of the mark generated by the reflected beam from the face of the AV prism 7 is determined (Fig. ), from the brand itself. The controlled angle is calculated from the dependent

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where k is the integer number of turns of the platform; n is the number of turns of the table on

angle of about 180 ° oC. As a reference, the device uses an angle of 360 °.

Claims (1)

Invention Formula A device for measuring prism angles containing a base, a shaft, a table mounted on it perpendicular to its axis, intended for placing a controlled prism on it, and an autocollimator installed perpendicular to the shaft axis, characterized in that, in order to increase measurement accuracy, it is equipped a platform mounted coaxially with the table with the possibility of rotation around the table and together with it, and a mirror mounted on the platform parallel to the axis of the shaft and optically connected with the autocollinator. fae. g fi9. fi.Z (us.S (pus. 6 7