SU1471069A1 - Arrangement for measuring geometric parameters of surfaces - Google Patents

Abstract

The invention relates to a measuring technique and can be applied in mechanical engineering in the manufacture and control of products of complex shape. The purpose of the invention is to simplify, increase sensitivity and accuracy by eliminating the errors of setting a point aperture in the focus of the lens by using spatial modulation of the light beam using a recording system. The radiation of the optical radiation source 1 is collimated by the lens 2. Using the lens 3, the radiation is focused on the surface of an object mounted on platform 4. The reflected radiation through the beam splitter 6 and the lens 7 is focused on the recording system 8. The measurement result is recorded using an oscilloscope 10 and a digital multimeter 11. 1 sludge.

Description

The invention relates to measuring equipment and can be applied in mechanical engineering in the manufacture and control of products of complex shape.

The purpose of the invention is to simplify, increase sensitivity and improve accuracy by eliminating the errors in the installation of a point aperture in the focus of modulation of the light beam using a registration system.

The drawing shows a block diagram of a device for measuring the geometric parameters of surfaces.

The device contains a source of 1 15 optical radiation, the first 2 and second 3 lenses, a platform 4 intended for installation on it 'of the measurement object, an optical table 5, a beam splitter 6, the third ·. 20 lens 7, recording system 8, ₄ amplifier 9, Yu oscilloscope, digital multimeter 11, power supply I2, 13 pulse generator.

The radiation of source 1 of the optical 25th radiation (industrial laser ILPN-204} is collimated by the first lens 2 (LOMO 9 x 0.20) and is focused by lens 3 (LOMO 20 / 1.5) onto the reference plates mounted on platform 4 30 placed on the optical table 5, this ensures the movement of the measurement object along the optical axis of the beam. The beam splitter 6 directs part of the reflected radiation collected by the lens 3 to the lens 7 (LOMO 9 x x 0.20),

This part of the light flux is focused into the active region of the registration system 40 8, made in the form of an injection laser operating in the photodiode mode. The photocurrent of this laser is amplified by an amplifier 9 and is recorded by an oscilloscope 10 and a digital multimeter 11. The laser is powered by a direct current source 12 and a generator providing radiation modulation.

As a source 1 of optical radiation and registration system 8, injection lasers ILPN-204 can be used, the first lens is a LOMO 9 x 0.20 lens, the second lens is LOMO 20 / 1.5, the third lens is LOMO 9 x 0.20, amplifier 9 - U2-9, oscilloscope

- 01-68, digital multimeter

- 1Ts4300,

Claims (1)

Claim A device for measuring the geometric parameters of surfaces, containing a radiation source, a first lens, a beam splitter and a second 'lens, optically connected with a beam splitter and sequentially mounted a third lens and a recording system, characterized in that, in order to simplify, increase the sensitivity and to improve accuracy, the registration system is made in the form of an injection laser with an aperture, an equal aperture of the radiation source, and it is installed at the focus of the third lens at a distance from the beam splitter equal to the distance from the radiation source to the beam splitter.