SU8637A1 - Colorimeter - Google Patents

Description

The proposed colorimeter differs from the colorimeters of the existing systems in that it permits the determination of the concentration of the test aperture liquid by comparing the brightness of its color with a liquid of a known concentration, using extremely small amounts of liquid. This can be achieved by a particular shape of the vessel intended for the test liquid and an increase in the binary field of view by the optical system. Another distinctive feature of the proposed colorimeter is a double wedge, which accommodates on one side one of the colored liquids being compared, and on the other the solvent. This compensates for the unequal absorption of light on different sections of the wedge observed in the colorimeters of other systems, due to the different thickness of the solvent layer, and, in addition, corrects the course of the rays. The third feature of the colorimeter is its optical system, very light and simple, consisting of two glass prizes, bringing together rays passing through each of the compared liquids. Prisms can be “the same, cut from one. a long trihedral prism, or all parts can be cut from them that are essential for determining the course of the rays. Finally, the base of the device of the proposed colorimeter allows it to also be made in the form of a small instrument that can be attached to the table of any microscope, using the optics of a microscope for enlarging a double field, and for illuminating it with a mirror above which a matte or colored glass can be located ( light filters).

The device of the proposed colorimeter is shown in the attached drawing, where in FIG. 1 shows a double wedge in section; in fig. 2 is a front view of a colorimeter, and FIG. 3 - vertical cross section of a colorimeter in the middle of it.

The colorimeter consists of a vessel 1 for one of the compared liquids — a prismatic or cylindrical shape with a flat transparent bottom (and, if needed, a lid), which can be given a very small volume, and a double hollow wedge 2, which on one side contains one of the compared liquids, on the other, solvent. It can be made in the form of a prism divided into two wedge-shaped compartments by a transparent plate lying in a diagonal plane, the prism (Fig. 1) or in the form of a combination of two wedges, or in the form of an ordinary wedge of the Autenrite type placed in a prismatic box. An integral part of the device is, in addition, the optical system 3, which brings together two beams: the veta, which passed from one side through vessel 1, from the other through a wedge. 2. This system can be made either in one of the usual ways, or in the form of two trihedral prisms, which turn the refractive ribs in different directions, and the bases to each other, and emit beams of light parallel and close to each other. Parts of prisms that are not involved in determining the course of the rays can be removed from one or both of the prisms (Fig. 3), thereby saving space and making the device more compact, either by other means. The contiguous optical system can be connected either to the outer frame R of the colorimeter itself or to the optical system 4, which serves to magnify the resulting double colored field. As such, it can be a magnifying glass or an ocular mounted on the same tripod with the other parts of the colorimeter, or the optical systems of the microscope on which table a colorimeter is fixed. In the latter case, a significant increase can be achieved while saving in the price of the device itself.

In addition to these main parts, the instrument provides a mechanical system that serves to move a double wedge in order to bring in the field of view different parts of the wedge with different thicknesses of colored liquid layers. This system can be made in various ways, for example, in the form of a box K of FIG. 2 and 3) with cut-outs O, which encloses a double wedge and an outer frame R sliding along the rails or grooves with which the ruler L is connected to measure the movement made by the observer’s hand or by means of a rack and M. G.

wheels or cherv For more accurate readings, a nonius N can be connected to the box.

The colorimeter can be mounted in a special frame, on a tripod or attached to the table of an ordinary microscope, for example, by means of the main board B with a cutout H through which the pressure springs or bolts pass. In the latter case, the illumination and magnifying optical system of the microscope can be used.

The subject of the patent.

1. A colorimeter, characterized by the use of a mobile vessel 2, of a prismatic shape, enclosing two wedge-shaped cavities, one of which contains a colored liquid of a known concentration, which is used for comparing the concentration of a colored test liquid placed in a prismatic or cylindrical small sized vessel 1, and another of which cavities is used to place a solvent in it, in order to compensate for the absorption of light by the solvent and to correct the path of the rays.

2. In the colorimeter described in paragraph 1, the use of an optical system that serves to bring together the light rays passing through. through vessels 1 and 2 of the colorimeter and consisting of two identical trihedral prisms P and P2, facing each other with bases and in which the excess parts of one or both of the prisms can be removed.

3. In the colorimeter described in pp 1 and 2, the use of the box K {s cut out O, which encloses a double wedge, the outer frame R, mounted on the rails or grooves of the outer frame R, mounted either on a separate tripod or attached to the table of the microscope using the latter case is the illumination and magnifying optical system of the microscope.

to A.I. Rabinovich patent S.D. Balakhovsky No. 8637

FIG.