SU485399A1 - Photoelectric autocollimator - Google Patents

Description

one

 The invention relates to a measuring technique.

Photovoltaic autocolliators are known, which contain an illuminator with a linear raster, a volume, and a receiving part with a ruled raster having a central dark stroke of twice the width and

optically conjugated to the illuminator raster.

These devices are widely used in measurement technology, but their accuracy and linearity range is relatively low.

In the proposed photoelectric. an autocollimator with an increased chain of linearity and range of linearity in the illuminator and the receiving part at the same distance

Two identical telescopic lenses are installed from their rasters, equipped with a synchronous drive that mixes them by the same amount on different sides relative to the axes of the beams of rays incident on them.

The drawing shows a schematic autoclimator that is pickled.

The photoelectric autocolumnator contains an illuminator, a lens 1 with a translucent plate 2 and a receiving part.

The instrument illuminator consists of a radiation source 3, a capacitor 4, a line raster 5 with alternating transparent lines of the same width, and a telescopic lens 6,

The receiver contains a telescopic lens 7, similar to lens 6, ruled raster 8, similar to raster 5, but having a central dark stroke of twice the width, sharing device 9, two condensers 1O, receiver ov 11, including, for example, a bridge circuit, and indicator 12. Telescopic lenses 6 and 7 for intermixing are equipped with a synchronous drive. In the initial position, when the non-enlarged strokes of the raster 5 cover half the corresponding transparent raster touches of the raster 8, the output signal is the difference of the signals from both ak radiation nicks 11, is zero. When the image of the grid is shifted raster 5

otnsh: italno lattice raster 8 ,. . , caused by the rotation of the counter-controlled:,. element 13, the image of dark strokes - ,. more than half of the corresponding projec-

j river strokes of one of the pemeTt- halves.

: kn raster 8, while images

. dark uiTgHjcpB in the other half of the lattice KH of raster 8 will start to overlap. less than half of the corresponding transparent lines, 1Qhov, As a result, the voltage from one

the receiver will increase as much as the voltage from the other receiver decreases, and the indicator 12 will register an output signal proportional to the angle; 15 rotation controlled element 13.

To compensate for the angular mismatch, one of the telescopic lenses will be mixed until the indicator 12: gives a signal that is equal to zero. 20 value

. the desired angle is read from the telescopic lens barrel .;

Subject invention

A photoelectric autocolumnator containing a line thunder illuminator, a lens and a receiver with a linear raster having a central dark bar of twice the width and an optic associated with the line raster northerly. This is due to the fact that, with a chain of accuracy increase n linearity range, in the illuminator and the receiving part at the same distance from them. rasters installed two identical telescopic lenses, equipped with a synchronous drive, moving them by the same amount in different directions relative to the axes of the beams of rays incident on them.