SU673842A1 - Optical theodolite - Google Patents

Description

(54) OPTICAL THEODOLITE

I

The invention relates to the field of geodetic instrumentation.

An optical theodolite 1 is known, containing a transparent limb, over which diametrically opposite sections are placed various prisms of the optical bridge, directing images of diametrically opposed strokes of the limb through the optical micrometer and the eye of the microscope and the lighting system. The lighting system with beam-splitting prisms placed above the limb is offset from the axis of rotation of the theodolite, and between the prisms of the optical bridge, one of which is designed as a Wollaston prism, in the center of the limb are installed reflecting faces of the perpendicular one another rectangular prism.

The disadvantage of a theodolite is the presence of two separate sources of illumination.

The aim of the invention is to simplify the design.

This is achieved by the fact that in theodolite the optical scheme is arranged in such a way that the input axes of the prisms of the lighting systems and the output axes of the prisms of the reading systems are combined for both circles in one

direct to the opposite direction of the rays, and the optical units for introducing light beams and switching images of circles are kinematically connected with the possibility of their simultaneous rotation through 90 ° or 180 °.

FIG. Figure 1 shows the optical layout of the theodolite; in fig. 2 - 2nd version of the optical scheme; in fig. 3 and 4 - the course of the rays in the device of the 2nd version in axonometry.

Theodolite contains vertical I and horizontal 2 circles; 3-5 prisms of lighting systems; prisms 6-8 reference systems; microscopes 9, 10 vertical and horizontal circles; optical block 11 for switching images of circles and inputting a light beam; combined in one straight axis 12 prisms of the lighting system. The drawings also show the 13 elements of the reading devices combined in one straight axis; axis 14 of the optical switching unit; a path of 15 rays from a light source; light source 16; move 17 rays to a mic

18 of the reading system and in the reading microscope 19.

The device operates as follows. In the position shown in FIG. 1 and 2, the light from the light source 16 through the switching prism of the illumination of the optical unit 11 hits the prisms 3 of the horizontal circle illumination system. Then, having passed through circle 2, prisms 8 and 7, microscope 10, switching prism of images of the circles of the optical unit 11, the light carrying the image of the strokes of the circle enters the micrometer 18 of the reading system, and then through the reading microscope into the eye of the observer. When switching to a vertical circle, the optical unit 11 is rotated (by 180 ° for the circuit of Fig. 1 and by 90 ° for the circuit of Fig. 2), after which the light from the source 16 travels the same way, but already carries the image of vertical lines into the eye of the observer. the circle. The circuit variant shown in FIG. 1, is designed for optical theodolites in which a direct sighting tube is installed, and the eye of the reading microscope is placed adjacent to the eye of the telescope and rotates with it. The embodiment shown in FIG. 2, is intended for

Claims (1)

Kind of theodolites with a broken pipe, for example, for astronomical theodolites. An optical theodolite containing horizontal and vertical circles, prisms of lighting and reading systems, optical blocks for switching the image of circles and entering a beam of light, characterized in that, in order to simplify the design, the input axes of the prisms of the lighting systems and the output axes of the prisms of the reading systems are combined for both circles in one straight line with the opposite direction of the rays, and the optical units for inputting light beams and switching images of circles are kinematically connected with the possibility of their simultaneous 90 ° or 180 ° rotation. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 272574, cl. G 01 C 1/02, 1970. / 7 /five Fy