G5M goniometer "tilt angle measurements" RARE USSR

Description

Description
Optical control and measuring device of laboratory type. Designed for measuring angles between flat polished faces of solids, as well as angles of pyramidality of prisms.
The goniometer consists of an autocollimator, an axial system, a slide table, and a reference system.
For measuring prisms, there is a set of rings that allow you to change the height of the table so that the middle of the prism faces is on the axis of the lens.
The automatic collimator has a 40-second magnification.
The lens is designed with a 40 cm focal length.
The lens has a light diameter of 50 millimeters.
The visual field in the collimator captures 50 degrees of view.
The resolution has a limit of 3 degrees.
The scale in micrometer has a division price of 1 unit.
In one step, you can measure the angle with an error of 5 units.
The collimator lens frame is at least 120 millimeters away from the axis where the limb rotates.
The table is located relative to the axis of the lens in the size of at least 30 millimeters.
The maximum weight of an object that can be placed on a table can reach approximately 8,200 grams.
General size parameters: 61 cm in length; 26 cm in width; 37 cm in height.
The total mass characteristic is 30 kilograms.
The principle of operation is that the reading of the angle of inclination of the base relative to the level axis is made on a glass limb using a reading microscope. Works in both natural and artificial light.
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