RU208126U1 - Sample positioning control device - Google Patents

Abstract

The utility model relates to the field of optics and can be used in sample positioning systems in industry, as well as in microscopic studies. The device contains an indicator, a control device, a laser, a photodetector matrix, two focusing devices, two focusing device drives, wherein the control device is connected to the indicator, laser, photodetector matrix, focusing device drives, the drive of the first focusing device is connected to the first focusing device, the drive of the second focusing device device is connected to the second focusing device, radiation from the laser is transmitted to the first focusing device, the first focusing device transmits radiation to the sample, radiation from the sample is transmitted to the second focusing device, radiation from the second focusing device is transmitted to the photodetector matrix. The technical result consists in providing the ability to control the movement of samples with a reflective and non-reflective surface. 1 ill.

Description

The utility model relates to technology and optics and can be used in sample positioning systems in industry, as well as in microscopic studies.

As a prototype, a sample positioning device was selected (Russian patent for utility model No. 201310, dated 09.12.2020, bulletin No. 34, IPC G02B 21/26), which includes a moving part, contains a movement device, a first photodetector matrix, a second photodetector matrix , third photodetector matrix, first laser, second laser, third laser, control device, first optical vortex generator, second optical vortex generator, third optical vortex generator, first interferometer, second interferometer, third interferometer, indicator, and the control device is connected to the first laser , the second laser, the third laser, the first optical vortex shaper, the second optical vortex shaper, the third optical vortex shaper, the first photodetector matrix, the second photodetector matrix, the third photodetector matrix, a moving device, an indicator, the radiation of the first laser is transmitted to the first optical vortex shaper and the first interf Here, the radiation of the second laser is transmitted to the second optical vortex former and the second interferometer, the radiation of the third laser is transmitted to the third optical vortex former and the third interferometer, the displacement device is connected to the moving part, the sample is located on the moving part.

Disadvantages of this device: the ability to control the movement of only samples with a smooth reflective surface.

The utility model is based on the task of expanding the functionality of the device by providing the ability to control the movement of samples with a reflective and non-reflective surface by introducing additional structural elements.

The problem is solved by the fact that the sample positioning control device, which includes an indicator, a control device, a laser, a photodetector matrix, additionally contains two focusing devices, two focusing device drives, and the control device is connected to an indicator, a laser, a photodetector matrix, focusing device drives, the focusing device is connected to the first focusing device, the drive of the second focusing device is connected to the second focusing device, the laser radiation is transmitted to the first focusing device, the first focusing device transmits radiation to the sample, the radiation from the sample is transmitted to the second focusing device, radiation from the second focusing device is transmitted to the photodetector matrix.

The features of a technical solution in common with the prototype are:

- indicator;

- laser;

- photodetector matrix;

- control device.

Distinctive features of the technical solution are:

- the first focusing device;

- the second focusing device.

- drive of the first focusing device;

- drive of the second focusing device.

The set of essential features provides the ability to control the movement of samples with a reflective and non-reflective surface due to the introduction of additional structural elements.

The essence of the technical solution is explained by the diagram of the sample positioning control device in FIG. one.

The sample positioning control device contains an indicator 1, a laser 2, a first focusing device 3, a drive for a first focusing device 4, a control device 5, a photodetector matrix 6, a second focusing device 7, a drive for a second focusing device 8, and the control device 5 is connected to the indicator 1, laser 2, photodetector 6, the drive of the first focusing device 4, the drive of the second focusing device 8, the drive of the first focusing device 4 is connected to the first focusing device 3, the drive of the second focusing device 8 is connected to the second focusing device 7, radiation from the laser 2 is transmitted to the first focusing device 3, the first focusing device 3 transmits radiation to the sample, radiation from the sample is transmitted to the second focusing device 7, from the second focusing device 7 radiation is transmitted to the photodetector matrix 6.

The sample positioning control device works as follows. The sample is positioned and locked in place. The control device 5 sends a signal to turn on the laser 2. In this case, the radiation of the laser 2 is transmitted to the first focusing device 3. The first focusing device 3 transmits radiation to the sample. When radiation hits the surface of the sample, which is more or less rough, a set of reflected waves is formed, interfering with each other - speckle [Ryabukho V.P. Speckle interferometry / V.P. Ryabukho // Soros Educational Journal. - 2001. - No. 7. With. nineteen]. The configuration (interference pattern) of the speckle is determined by the geometry of the sample surface, the distance to the observation point, the distance to the radiation source, the parameters of the medium [Ryabukho V.P. Speckle interferometry / V.P. Ryabukho // Soros Educational Journal. - 2001. - No. 7. With. nineteen]. The radiation from the sample (in the form of speckle) is transmitted to the second focusing device 7. From the second focusing device 7, the radiation is transmitted to the photodetector matrix 6. To obtain maximum sensitivity to the movement of the sample, the control device 5 sends movement signals to the drive of the first focusing device 4, which moves the first focusing device 3, and to the drive of the second focusing device 8, which moves the second focusing device 7, reading data from the photodetector matrix 6. When moving the first focusing device 3 and the second focusing device 7, the focusing of the electromagnetic wave changes (the cross-sectional area changes). When the maximum signal from the photodetector matrix 6 is reached, when the speckle area transmitted to the photodetector matrix 6 is maximum, the control device 5 fixes the positions of the drive of the first focusing device 4, which moves the first focusing device 3, and the drive of the second focusing device 8, which moves the second focusing device 7. When fixing the first focusing device 3 and the second focusing device 7, the configuration of the speckle will be determined by the position of the sample (the parameters of the radiation source - laser 2, the parameters of the medium remain constant). The control device 5 continuously reads data from the photodetector matrix 6 and compares it with the previous value. If the sample (due to any external influences) has changed its position, the configuration of the speckle changes [Ryabukho V.P. Speckle interferometry / V.P. Ryabukho // Soros Educational Journal. -2001. - No. 7. With. 1 - 9], the new data taken by the control device 5 from the photodetector matrix 6 does not correspond to the previous ones, the control device 5 gives a turn-on signal to the indicator, which signals a sample shift.

An example of execution. The lgn-208 laser with a wavelength of 632.8 nm and a power of 2 mW can be used as a laser. The control device can be a kr1878ve1 microcontroller. An icx228al CCD can be used as a photodetector matrix. Stepper motors 25byz-b03 can be used as drives for focusing devices. The focusing devices can be lenses such as bk7 oem. The indicator can be dm-0113-t.

The sample positioning control device provides the ability to control the movement of samples with a reflective and non-reflective surface due to the introduction of additional structural elements.

Claims (1)

A sample positioning control device, including an indicator, a control device, a laser, a photodetector matrix, characterized in that it additionally contains two focusing devices, two focusing device drives, the control device being connected to an indicator, a laser, a photodetector matrix, focusing device drives, a first focusing device device is connected to the first focusing device, the drive of the second focusing device is connected to the second focusing device, the laser radiation is transmitted to the first focusing device, the first focusing device transmits radiation to the sample, radiation from the sample is transmitted to the second focusing device, from the second focusing device, radiation is transmitted to photodetector matrix.

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