RU1784842C - Collimated radiation divergence angle measuring device - Google Patents

Abstract

Use, in particular, for controlling the divergence angle of a collimated beam of rays. SUMMARY OF THE INVENTION: the device comprises a lens arranged in series along the rays, an optical wedge, a projection system, a front focus that coincides with the rear focus of the lens, and a recorder. The lens is made in the form of segments, the number of which is at least three, docked at a common vertex and pairwise tilted to each other around the axis. passing through the apex perpendicular to the docking plane. 2 ill.

Description

The invention relates to the field of technical physics, in particular to the field of measurement of parameters of light radiation, in particular, the angle of divergence.

A device for controlling the angle of divergence is known. The most common device is a telephoto lens with a long focal lens. The operation of the device is based on measuring the diameter of the light spot obtained in the focal plane of the lens. The divergence angle is calculated from the ratio of this diameter, measured at a known energy level from the maximum, to the focal length of the lens. The disadvantage of the device is related to that. that the measurement of the angle is carried out in one - the diametrical plane of registration, which reduces the accuracy of the measurements.

The closest technical solution can be considered a device for measuring the angle of divergence, containing

a lens arranged in series along the radiation path, two optical wedges docked on the optical axis, a projection system, a front focus that coincides with the rear focus of the lens, and a recorder. The disadvantage of this device is that the angle measurements are carried out on the water plane of registration perpendicular to the plane of joining of the wedges, which reduces the accuracy of the measurements.

The aim of the invention is to increase the accuracy of measurements by measuring the angle in the n-plane registration.

This goal is achieved by the fact that the lens, the projection system, the front focus, which coincides with the rear focus of the lens, and the recorder are arranged sequentially along the radiation in the device. „

Figure 1 shows the optical diagram of the device, where 1 is the lens, 2 is the projection XI QD

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on the system, 3 - the registrar; in Fig. 2 - a lens in the case of three segments (n 3): VOG, YEAR, DOV, O - the common vertex of the segments joining; OK - common docking line, optical axis of the device; OA is the axis passing through the apex of the segment perpendicular to the common docking line.

A feature of the lens device is that. that each segment is rotated around its axis passing through the top of the segment perpendicular to the common docking line. Thus, for example, the VOG segment (Fig. 2) is rotated in an arrow around the axis OA (extension of the DO line) by an angle a, the YEAR segment is rotated by the same angle around an axis that is a continuation of line 0B; and the BOD segment is rotated the same angle around a line extending the exhaust line. To make such a lens in the form of a plano-convex line, it is necessary to have three identical plano-convex lenses. One lens is cut from each lens after a corner turn. The resulting three segments are joined at a common vertex O, forming a common OK docking line. The resulting lens takes the form of a propeller. To provide a holistic design, the segments are either interconnected using optical glue or reinforced in an annular frame with a sealant.

Compared with the known, the proposed device can significantly improve the accuracy of measurements. In a known device for measuring the angle of divergence

The stitches measure the diameter of the light spot produced in the focal plane of the lens. Measurements are taken in the same recording plane, which limits the accuracy of the measurements.

The implementation of the lens in the form of a set of segments n-docked at a common vertex allows the formation of n-focal spots in the focal plane. This allows spot diameter measurements in n-planes. which means to increase

accuracy is 5 times. compared to the prototype.

The proposed device for measuring the angle has prospects for use both in laser technology, and in optical technology and optical instrumentation. The most important application of the device is the alignment of optical instruments.

Claims (1)

SUMMARY OF THE INVENTION A device for measuring the angle of divergence of collimated radiation, comprising a lens arranged in series along the radiation, a projection system, the front focus of which coincides with the rear focus of the lens, and a recorder, which, in order to improve the accuracy of measurements by measuring the angle in the n-planes of registration, the lens is made in the form of segments, the number of which is at least three, with the segments docked at a common vertex, and each subsequent segment is set at an angle to A previous about an axis extending through the vertex perpendicular to a common plane joining the segments. Figure 1 b R about fig