SU26097A1 - A device for testing the pyramid of the faces of the grinding prisms - Google Patents

Description

The proposed device for checking the pyramid of the faces of grinding prisms is based on the principle of dutocollimation.

The schematic drawing shows the device in longitudinal section.

The focus of the objective 4 of the telescopic tube 6, which has a cranked view for convenience of operation, contains a scale 3, the divisions of which correspond to the required measurement accuracy.

The scale 3 is viewed by the observer through the eye of the eye 2, provided with diopter divisions, and may have an axial movement to be set at the focus of the lens 4.

The change in the direction of the rays in the knee is achieved by a mirror 5 with a silvered front plane (the mirror can be replaced with a prism). The test prism 9 is placed under the lens of the tube b on the table 11 in the interchangeable socket 7. The prism rests with one plane on the knife 8 and the tip 8, and on the other only on the knife.

Table 11 is attracted to the base 15 by a spring 13 acting on the base screw 14, and can, if necessary, change position with the aid of micrometer screws 12.

The pipe b is connected to the base 15 by means of a fixed rack 16 and a clamp 17, which can move up and down the rack with a rack 19.

Nest 7 is installed along a reference prism, so that the reflecting hypotenuse plane takes a perpendicular position to the main optical axis of the tube, which is determined by the coincidence of the reflected image of the scale with the scale itself.

A polished prism 9 is placed on the installed nest, and a plane-parallel mirror 10 is placed on the hypotenuse plane of it.

The mirror 10 superimposed on the prism will occupy a position not perpendicular to the optical axis of the tube 6, and the reflected image will not coincide with the scale itself.

The magnitude of the discrepancy between the central lines of the scales is counted on the scale itself in angular units.

In the case of polished prisms without the use of a mirror 10, one can determine: 1) pyramidality, 2) an angle error of 90 ° and 3) an error of angles of 45 °.

The subject matter of the invention.

A device for checking the pyramid of the faces of ground prisms with an autocolpimization tube movable on a stand, characterized by the use of a slotted 7 with knives located under the lens 4 and equipped with an adjusting micrometer-8.

take off, screws 12 of the table P, pr-gi-i and point 8 for the reception of the researched

to a base 15 by a spring 13, I prisms 9, on which lies the plane acting on the base screw 14, and a non-parallel mirror 10.

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