SU1046728A1 - Device for adjusting optical component tilt angle - Google Patents

Abstract

DEVICE FOR SETTING ANGLE OF OPTICAL ELEMENTS, comprising a housing, a rigid frame opticheskogoelementa, the adjustment assembly mounted in the housing, two pairs of flat springs whose axes are mutually perpendicular are disposed in one plane and intersect at the optical spar member, characterized in that, with the purpose of expanding the range, improving the accuracy and sensitivity of the adjustment, a rigid lever is introduced into it, contacting with the adjusting unit and connected by one pair of coaxial flat springs with the frame, ora connected to another pair of flat springs coaxial with the housing, wherein the length and section of the flat springs are determined ratio, E J tf.Z

Description

The invention relates to optical instrument making and can be used to precisely adjust the angle of inclination of optical elements. A device for reproducing small angles is known, consisting of a fixed base, a prism, and a cylindrical roller, the shape of a chain. The lever for holding the optical element and the differential screw for turning the lever 1 is on the device. The disadvantages of this device are large dimensions, low productivity and low reliability during thermal stabilization with an accuracy of 0.3 ° C. A device for adjusting the angle of inclination of optical elements is known, comprising a body, a rigid frame of an optical element, an adjusting unit installed in the body, two pairs of flat springs, the axes of which are mutually perpendicular to the same plane and intersect on the optical axis of element 2.. The devices are small adjustment range, low accuracy and sensitivity. The purpose of the invention is to expand the range, increase the accuracy and sensitivity of the adjustment. This goal is achieved by inserting a rigid lever in contact with the adjustment unit and connecting one pair of coaxial flat springs to the frame, which is connected to another pair of coaxial Flat springs with the body, and the lengths and cross sections of the flat springs are determined by the ratio. SL (znV) H / u R {// 3-1 / 2) where is the angle of rotation of the lever, ang. . y is the angle of rotation of the optical element, ang; .К - gear ratio, n than 2 К 600 Е - modulus of elasticity of spring material, MPa} Ci - shear modulus of spring material, MPa; f- axial moment of inertia of the spring connecting the frame to the fixed body, polar moment of inertia of the spring connecting the frame to the rigid arm, m B- - spring length (connecting the lever and frame, m; 2 - distance between the center of the device and the fixed case, Mf - bb; dimension parameter, g 1 | 2J 172 Rich, when choosing v it is necessary to observe the condition O, 667 i. 0,5} f. The transfer ratio of 2 to 600 is obtained within the specified limits because the springs connecting the frame of the optical element and the rigid lever, and trying to twist the deformation of the lever.The torsional moments resulting from the deformation of the torsion of the springs are transmitted to the rim of the optical element and cause the springs connecting the rim of the optical element and the fixed body to bend, and depending on the desired angle of rotation of the optical element determine the gear ratio and, therefore, the required angle of rotation of the lever. In Fig. 1 shows a device, a general view; in fig. 2 - the same, frontal VIEW} in FIG. 3 - the same plan view; in fig. 4 is a section A-A in FIG. 2 (a spring connecting the frame of the optical element and a fixed case /; in Fig. 5 is a section BB in Fig. 2 (a spring connecting the frame of the optical element with a rigid lever). The device consists of a fixed case 1 connected to a rigid 2 pair of spring springs 3. The optical element is attached to the rigid onppiie 2. The frame 2 is connected to the rigid lever 5 by means of flat springs1 6, the axes of which are perpendicular to the axis of the springs 3. The reflecting surface of the optical element 4 is in the plane, the passage through the middle line of flat reins 3 and 6. The hard arm 5 contacts through point 7 with an adjusting screw 8. At lengths of springs 3 and 6, as well as their cross-sections, are selected based on the ratio of Eug () E J (1/5-g / 2) where H - angle of rotation, lever, angular s; - angle of rotation of the optical element, angular sec; K - gear ratio, 2 K 600, E - modulus of elasticity of the material's spring, MPa G modulus of shear of the spring material, MPa; 3vv- the axial moment of inertia of the spring connecting the frame and the fixed body,

-.(AT)

polar moment of inertia of the spring connecting the frame with the rigid lever, m;

; The length of the spring, sheadin th lever and frame, m;

7 distance between the center of the device and the fixed case, m; dimensionless parameter

1 1 / EN / 2-prichem at

jf242 / e

When choosing q, it is necessary to observe the condition 0.667 tj 0.5} the length of the spring (Connecting

frame and body, jl. The device works as follows.

When the screw 8 is rotated, the rigid lever 5 rotates on the springs 6 around the axis passing through the center line of the springs. The torsional moments, I, arising from the twist deformation of the springs 6, are transmitted to the rigid frame 2 and cause the springs 3 to bend. Depending on the calculated gear ratio, the rigid frame 2 with the optical element 4 attached to it rotates by a certain angle.

0

The device allows to obtain the accuracy of the angle of rotation of the optical element to (1-5 10, sensitivity 1-U, which is higher than similar characteristics of the known device

5 to 10 times, and the range of the angle of rotation of the optical element in 60, which is 600 times higher than that of the known device. Such a rotation of an optical element can be applied in an x-ray interferometer, in which

0 need to rotate mirrors in.

S-ff

Claims (2)

DEVICE FOR ADJUSTING THE TILT ANGLE OF OPTICAL ELEMENTS, comprising a housing, a rigid frame of an optical element, an adjustment unit mounted in the housing, two pairs of flat springs whose axes are mutually perpendicular, are located in the same plane and intersect on the optical axis of the element, characterized in that, for the purpose of expanding the range, increasing the accuracy and sensitivity of adjustment, a hard lever is introduced into it, which is in contact with the adjustment unit and connected by one pair of coaxial flat springs with a frame that it is united by another pair of coaxial flat springs with a housing, the lengths and sections of flat springs being determined by the ratio. E L. Z / Z + rj ί Ts ¹ (1 / 3-1 / 2) where Ϋ is the angle of rotation of the lever, in Ch. from". γ is the angle of rotation of the optical element, angl.s .; K is the gear ratio, and 2 <K <600} / E is the elastic modulus of the spring material, MPa; • Q - shear modulus of the spring material, MPa; axial moment of inertia of the spring connecting the frame and / 'stationary body, m ⁴ ; Er-polar moment of inertia of the spring connecting the frame with> rigid lever, m ⁴ ; ? _in - the length of the spring connecting · the lever and the frame, m; 2 - the distance between the center of the device and the fixed body, m; I is the dimensionless parameter, 1 / s + ι / a. k - ~ r, ---- "and at. .1 / 2 + z / e ^ the choice of q must comply with the condition 0.667> q> 0.5; the length of the spring connecting the frame and the housing, m