SU34A1 - Level for readings without moving the viewer when leveling from the middle - Google Patents

Description

The proposed levellier aims to reduce the image of the front and rear slats to a single point, which eliminates the need to move both the observer himself and his eyes when leveling from the middle. This nivellier is a simplified design of a nivelier with two sighting tubes, described in privilege no. 28985 dated January 31, 1917.

As can be seen from the attached schematic drawing, the nivelir consists of: 1) one sight tube with two A and B lenses at the ends, 2) an eyepiece tube with an ocular D located perpendicularly in the middle of the first tube and 3) a rotating rectangular prism of total internal reflection C, located at the intersection of the optical axes of the objective and ocular tubes. The axis of rotation of the prism passes through the middle of the hypotenuse and the point of intersection of the axes of the pipes.

The prism for observation is set with a leg towards the observed

subject so that the ray of sight from the rail l, passed through the lens B and the prism, is reflected at point C in the direction of the CD and through the eye of the eye D gets into the eye of the observer. For readings on the rail, the prism is rotated 90 ° (dotted designation) and the ray of sight from the rail (7, passed through the lens A and reflected at the point C of the prism, passes through the ocular D into the eye of the leveler.

SUBJECT OF INVENTION.

Niveller for readings without moving the observer when leveling out from the middle is characterized in that it consists of a tube with two lenses A to B and a CC tube with an eyepiece D perpendicular to the first in its middle and provided with an objective and an ocul at the intersection point tubes, for directing rays from the rails passing through both lenses into the ocular, with a rotational prism C of the full-interior reflection.

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