SU103946A1 - Raster compensator for polarization devices - Google Patents

Description

Irc. South pacTpOBwii komiensatod is intended for Brumer) 1I partial under 1) positioning and can also serve to measure depolarization and determine the polarization azimuth.

A special compensator is the presence of a number of holes in it, which provides an increase in measurement accuracy.

FIG. 1 and the proposed raster k.o geologist in Three variants; in fig. 2 a measurement scheme has been introduced with the use of a raster compensator; FIG. oh oh. It is the principle of its action.

The raster comer is itself PM rg 1d with round holes (1), or with holes in the form of parts (2) of the sector, or in the form of slits (3).

FIG. 2, depicting the cxeiEy measurement with orienting the proposed raster to the homogenizer, are indicated: (4) - raster compensator, (o) - decoherent, (6) - wrap |; aggative iolizer; ) - a lens.

The principle of operation of the raster loudspeaker is as follows.

Let there be. partial) polarized light with components. (A and B) (Fig. 3). Lawn (the light cross section of the light flux is divided into two parts. Odia half (right) from vetovy flow and goes through the polarizer, and the second (left) - mine polarizer. Nloird right: half is equal to one, and the left half - paBHoii K. If the irians are the amity of the oscillations that follow the ordinate of the ordinate equal to one and the x axis of the abscissa is equal to a and denote by φ the angle between the polarization polarization polarization and is1) U abscissa, then intensity c) -; ) the polarizer will be equal to

a-cos--f sin-y.

The projections of the oscillations on the osp coordinate expression: a.yuts are as follows: (a-cos-9 + sin-f) sin- a (a COS.- f-j-sm ff) cos f.

For simplicity, it is assumed that the polaroid does not possess an 1;

After the compensator, the beam is rotated through the decoheprator, i.e., il.tiik.u islett spar, cut parallel to the axis. The main directions of decoherence are combined with the axes of the selected coordinate system. Decogsfentpr decomposes - oscillations of the polarizer of the polarizer in two mutually (perpendicular components of the intensity and intensity, indicated by the vynga. Nitenshio-CTii slagayunts1kh (the x-axis and the XI axis O1) diat in the left side .a). nv pryhgdshpkh through poloid, c)) Trazh1ots5G the next way K-a- and K (E in the Diane case can be) asmatrpvat how. ko) ffptsne) 1t less1; eee). Turning the polarizer to the corresponding angle, up to those jrop, iok, the total intensity of the oscillations along the abscissa and the ordinate axis for both by the flow type and will be equal to each other, i .e. until the ratio is fair:

Y - K- + (a cos-o - | - sin-i) cos-f -

- K- + (y.- cos- -g s, irf y) sin

u

whence, priipma a (O polarized) the first light), calculate I1) the unit value K. The value of K and measured by the favor is,

chop 1) 1Ч4ц; pour. ci ,, (i.e., stack |; nn polarizations).

If u, as; indicated VYLA (lerforiro-BainYi pol roid, then to the part of the sex roid, .. .. ogre1 ICHeinoy Holes, and to -CaM031U of the move pryu1eshga move) as1u, waitings, ido-zhsnnp above. In this case, K bud “t. It is the ratio of the sum of the area of the holes to} 1 plots,:, anima (lolsshmsdom. When leveling the components (at the corresponding angle of 9), it turns out to be natural for h-, ua ga; pi and about a certain area; : a rotating polarization (i will not give a component that changes in length) A photocell connected to a register1 and another device {an oscillograph with an amplifier, a galvanometer, and so on) will show that there is no alternating photocurrent.

If it is required to measure a very scarlet partial 0 and a riza; qi o, then the total area is taken as the marginal (determined by B, Hie). In this case, the angle of rotation will be and the compensator will be very sensible.

Prev 5 et 3 about b ete, and

The raster contour (a sensor for field designation), OTLI Cha and I S C is that, for the purpose of first (no measurement accuracy), it is made in the form of a polaroid i:) POISON |) m holes.

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