SU34185A1 - Device for producing flat polarized rays - Google Patents

Description

The proposed polarization device consists of two surface silvering mirrors and one morblitic mirror, which are fixed on the rotating casing so that the optical axis of the incoming parallel light beam is maintained at the output at all possible casing angles.

In FIG. 1 depicts the scheme of the proposed device; FIG. 2 is a front view of the device; FIG. 3 is a side view of it; FIG. 4 installation for studying the distribution of stresses in transparent models of machine parts with the help of two proposed devices.

The principle of the device is illustrated in FIG. 1. A parallel beam of light falls on the mirror / which, having reflected first from the mirror /, and then from mirror 2, falls at a certain angle, (the angle compiled with the normal of the mirror, the so-called full polarization angle, depending on the refractive index of , substances) to the morblitic mirror 3. From the latter a beam of light leaves the device already flat-polarized, with the optical axis of the outgoing light beam completely coinciding with the optical axis of the incoming one.

All the sizes of the mirrors and their relative position are calculated, eq, e from the known total polarization angle (424)

for morblita 57 ° and the desired working area, i.e. the cross section of the upper beam (L) -

For simplicity, rectangular mirrors can be taken; if one wants to obtain an outgoing beam of circular cross section, it is necessary to cut mirrors 7, 2 and S into ellipses; in this case, where d is the diameter of the outgoing beam.

From the drawing (fig.) It can be seen that if Y 57, then a - - at 33 °. Need a mirror (as / 5)

The length of the projection of this mirror is: a sina la to the horizontal: a cos a. The width of the mirrors J, 2 and 3 is equal to fi. The length of the prism, on which the mirrors / VI 3 lie: L 21 -f-s, where c is the gap between the upper ends of the reflecting surfaces of the mirrors 1 3.

A prism with mirrors is placed entirely inside the casing 7. Length / (on the inside): V h ..Q.

The working length of mirror 2 is defined as the side of the parallelogram / / - s; height h. up reflective

 from the surface of the mirror 2-А -s- d 5;

and Handle S is used to rotate casing 7, and a stochorn screw 9 is used to secure it at any incline. Two mirrors / and 2 mirrors and a morblitic mirror 5 are mounted inside the leather casing 7. Mirror / is placed with its reflective surface against the casing inlet , and the morblitic mirror 3 is located opposite its outlet. Both mirrors are symmetrical with respect to the perpendicular to the “upper mirror 2, lowered from the middle of the latter. This arrangement of the mirrors is necessary for mutual parallelism and complete coincidence of the optical axes of the incoming and outgoing light beams at various angles of inclination of the casing 7. For the mirror 2, the nuts are also provided with a scale / A for fixing the rotation of the housing 7.

This device can be used to study the distribution of stresses in transparent models of machine parts. To do this, on each optical axis, two indicated T1 devices L and B (Fig. 4) are installed: one as a polarizer and the other as a polarizer. analyst. A transparent model under test is placed between them; In addition, they install two optical systems E and, the light source D, the screen .f and the photographic apparatus G.

With all the necessary, experimental, manipulation, somehow;

rotation of both A t B devices by one and the same angle while maintaining the original relative position between the moving parts of the device — the photographic device Q remains at the same place throughout the experiment.

The subject matter of the invention.

A device for producing a beam of plane-polarized rays, using two surface silvering mirrors and one Morblite one, characterized in that, in order to maintain mutual parallelism and match the optical axes of the incoming and outgoing light beams during all possible turns of the enclosing mirror of the housing, the mirror / surface silver, placed its reflective surface against the inlet of the casing, and the morblitic mirror 3, which lies opposite its outlet, are arranged symmetrically with respect to to the perpendicular to the second mirror 2 of the surface of silver; in the center of the latter.

2. The use of two devices according to claim 1, one as a polarizer and another, as an analyzer in studying the distribution of stresses in transparent models of machine parts.