SU156315A1 - - Google Patents

Description

Visual tubes for precision measuring devices and projection systems are known, containing a telescopic C1 system, a microscope and a flat mirror, which moves parallel to itself along the optical axis of the telescopic system and is perpendicular to this axis.

To maintain the constant magnification of the pipe when changing its focusing, a flat mirror is located behind the eye of the telescopic system.

FIG. i is a diagram of the telescope; in fig. 2 - the same, the projection system.

Rays of light from the object being observed pass through the lens / and the eye of the telescopic system 2 and, through the prism-cube 3, hit the focusing flat mirror 4. The mirror is located perpendicular to the optical axis of the telescopic system and can be parallel to itself along this axis. By moving the mirror I3, the length of the optical path of the rays changes, and this is a way of refocusing without measuring the magnification of the tube. The absence of an internal focusing lens reduces the position errors of the sighting axis during refocusing of the tube, since the parallelism of the flat mirror to itself is relatively easily achieved.

The rays reflected from the mirror fall on the translucent inner edge of the prism cube and, after reflection, are captured by a microscope 5 through which the image of the observed object is viewed.

Subject invention

A telescope tube for precision measuring instruments, as well as projection systems, containing a telescopic system, a microscope and a flat mirror, moving parallel to itself along the optical axis of the telescopic system and perpendicular to this axis, in order to maintain the constant magnification of the tube when changing its focus, the flat mirror is located behind the eye of the telescopic system.

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