SU1302142A1 - Liquid slope compensator - Google Patents

Abstract

The invention relates to geodetic instrumentation and allows simplifying the manufacturing technology of the device by expanding the class of fluids used. In front of the ampoule 1 with the liquid is a telescopic optical system of positive 3 and negative 4 components. When the equality Г п - 1 is fulfilled (Г is the increase in the optical system; n is the refractive index of the liquid), after passing through the compensator, the optical beam, whose optical axis is inclined, will be directed along this axis. The magnification adjustment of the optical system with an additional component cm4 5 is carried out by moving components 4 and 5 along the optical axis of the system. 4 il. § (L (RI9L

Description

one

The invention relates to the field of geodetic instrumentation, in particular to geodesic devices with a self-aligning line of sight.

The aim of the invention is to simplify the manufacturing technology for expanding the class of used liquids.

FIG. 1 is a diagram of a liquid compensator for a bottom-up light flux; Fig. 2 is a diagram of a compensator for a luminous flux passing from top to bottom; Fig. 3 is a diagram, according to the principle of operation of the compensator; in fig. 4 - compensator with an adjustable optical component;

The compensator (FIG. 1) contains a vial 1 with a liquid in front of which a telescopic optical system 2 is located. Two of the two components are positive 3 and negative 4. system 2 has a positive optical power, t, e, the increase in the optical system has a negative value,

The compensator works as follows

When the optical axis of the compensator is positioned vertically, the surface of the liquid is horizontal and the vertical beam of rays does not change its direction. When the optical axis of the compensator is tilted, the vertical beam of rays enters the optical system 2 at an angle and leaves it at an angle

e g-,

where G is the increase in the optical system1

Next, the beam of rays hits the wedge, formed by the horizontal surface of the liquid and the window of the ampoule 1 of the compensator. The magnitude of the angular deflection of the beam by the wedge is expressed by the formula

S 9 (n - 1),

where o is the deflection angle of the beam by the wedge 0 is the angle at the vertex of the wedge; n is the refractive index of the wedge.

Since the angle at the tip of the wedge 9 is equal to the deflection angle of the optical

t yfO

J5

20

25

3021422

axis from the vertical, then for condition of compensation. angle; However, t, e, so that the angle is equal to zero, the condition must be met: -. e (n - 1)

or r (n - 1), whence: G n - 1,

where G is the increase in the optical system; .

n is the refractive index of the fluid.

If this condition is met, the vertical beam of rays passing through the compensator will be directed along the optical axis of the compensator, t, e, the position of the sighting axis will remain unchanged.

When the light beam passes through the compensator from top to bottom, the direction of deflection of the rays by the liquid wedge is reversed, therefore the increase in the optical system must be negative and can be performed by the formula D - (n - 1)

From the obtained dependence it can be seen that for liquids with different refractive indices it is always possible to calculate the optical system, which will make it possible to obtain a compensation condition. In this way, the constraints associated with the rigidly set refractive index of liquids for compensators are removed, which makes it possible to expand the choice of liquids for ampoules of compensators. The main criteria for this are the fluid viscosity and the stability of its parameters, which determine the reliability of the compensator under conditions of varying temperature and vibration.

Fig, 4 shows an example of a liquid compensator with an adjustable optical system. For this, an additional component 5 is introduced into the telescopic optical system. The increase in the optical system is adjusted by moving the second component 5 and the third component 4 along the optical axis. The magnification adjustment is carried out within a small range (, 01) and allows the magnification value to be set in accordance with the refractive index of the compensator fluid.

Claims (1)

Invention Formula Liquid angle compensator, containing an ampoule filled thirty 35 40 45 50. 55 313021424 liquid, distinguished. with a scopic system, an increase in the fact that, in order to simplify the technology, which is associated with the coefficient n rotting due to the expansion of the refraction of the liquid by the ratio a class of fluids used, it is equipped with a 5G n - 1 rigidly connected with an ampoule, 9g.1 fpuz.2 Editor S.Patrusheva Compiled by T.Drevnovska Tehred N.Glushchenko Proofreader M.Samborsk Order 1207/41 Circulation 678 Subscription VNIIPI USSR State Committee on affairs of inventions and otkryggy 113035, Moscow, Zh-35, Raushsk nab., d. 4/5 Production and printing company, Uzhgorod, st. Project, 4 .З