SU40005A1 - Measuring auxiliary segment to a polarization microscope - Google Patents

Description

The usual auxiliary segment serves, as is well known, on Fedorov’s bollard to prevent total internal reflection when the preparation is tilted; the proposed measurement auxiliary segment also serves to measure the spherical coordinates of the inclination of the preparation with respect to the optical axis of the microscope; Measurements are made using a table of microscope alone. The measuring segment has its main purpose for working with a hemisphere on a rocking chair, but such a segment can also be used on the Fedorov table, made without limbs and arches, which have degrees of division.

On the drawing flg. 1-6 represent various embodiments of the measurement auxiliary segment; a. Fixed in the holder measuring segment A (Fig. 1). The main elements of measuring segment A are four or two diameters, four or two arcs of large circles drawn at 45 ° on its plane II, drawn through its i.epnjHHy along its spherical surface in planes perpendicular to the diameters. Diameters pp .; pressed into (378)

the number of axes for determining the two spherical coordinates of the inclination of the plane-segment, and therefore the plane of the slit 1 of the crystal under investigation, from the foot of the microscope or the axis of rotation of the rocking chair or table Fedorov; The arcs drawn on the segment have the purpose of “an optical installation perpendicular to the diameters of the microscope's optical axis.

An optical installation is necessary in order to measure on a table of 1-1 of the L1 microscope a linear angle between the diameter and the rocking axis, corresponding to the spherical angle between the poles of their directions on the stereographic grid. The pole is defined; 1. My thus the main optical or any other plane in the crystal is obtained on the stereographic grid at the intersection of two small circles.

If there are four arcs on the spherical surface of the segment on its plane, instead of four intersecting diameters, it is sufficient to have only two, at an angle of 90 °.

The segment is attached to a metal holder that is screwed to the hemisphere.

The measuring segment B fixed in the holder (fig. 2). The measuring segment consists of two glued nolovin. The segment has four at an angle of 45 or two at an angle of 90 ° drawn in a plane of diameter and four corresponding arcs of large circles traced by a node at an angle of 45 ° through its top on its spherical surface. In addition, the TaFiofi segment has a drawn line of its height. A sequence with an inclined hemisphere makes it possible to determine the plane of incidence of its equator.

Complex measuring segment Ca (Fig. 3). The complex measuring segment of Ca consists of two parts — the upper segment, the segment itself: it is: a with diameters of four or two diameters drawn on its plane; perpendicular to them are arcs of large circles that are paralleled to the spherical surface of the segment, and immobile in the holder of its lower part, leading to it, it has a solid glass slide with a diameter and radius traced along it. A complex segment allows you to set in the most convenient position relative to the plane defined in the crystal, the lines of diameters drawn on it, serving as coordinates, for determining the spherical coordinates of the plane; In addition, a complex segment makes it possible to determine on the microscope table the angle between the strike line of the inclined hemisphere plane and the diameter drawn on the fixed lower part of the segment, corresponding to the zero Wolfe grid meridian, which significantly misses the definition of the spherical coordinates of the characteristic vector in the mineral.

The segment R, Rb and RC, similar to the segments / 4 and the upper part of the segments СЬ and Сc, rotated in the round hole of the segment} segment segments (Fig. 2), may partly replace the complex segment in its designation. . In order to completely replace a complex segment with a rotating segment R, it is necessary to have a zero meridian traced on the hemisphere.

Complex measuring segment СЬ

(Fig. 4). In order to directly observe the angle of incidence of a tilted hemisphere plane through a microscope, the complex measuring segment Cb has on its spherical surface a large circle of arc drawn through the top of the segment with three or five tigrades; on a rotating segment with such an arc drawn, it is sufficient to have one dimeter drawn on its plane.

Difficult measuring segment of the SS (Fig. 5). On the spherical surface of the complex measuring segment, the Cc is drawn from the top to the groove in 60 ° with a dotted line of the spiral, in one, a turn, a line; This serves to measure the incidence angle of the inclined hemisphere plane. The angle of incidence is measured using the l-icroscope table, since each point of the helix line corresponds to a definite azimuth angle. To measure the same angle of the lzimuth angle n1; - :; n- simple | The rppp slope of the hemisphere | b in such a segment serves a drawn line of its height, for drawing of which the segment Illogotsly is glued from its two glued

POLO13IN.

Stationary measuring segment in the holder D with a screw., 1c cap (fkg. B). Such a cap, made of ;; rozrachpoy plastic mass or glass, has four or two arcs drawn on a lead or (Da) - or (Db) one divided meadow or finally (Dc) a spiral line. The cap rotates along the edge of the metal ring representing the holding part; segment and bordering segment with latitudinal near-equatorial som. The segment and -,; on its plane are two diameters NS and WO and on its spherical surface, two corresponding arcs of large circles intersecting at its top. When using a spiral cap, it is necessary to have a segment glued together from two halves with a drawn line of its height.

Segments of a microconoscope with DNA and arcs drawn on them can also be considered as from measuring segments. In the case of a complex measuring segment, a groove is made on the side;