RU26941U1 - LASER MICRO REFLECTOMETER - Google Patents

Abstract

A laser microreflectometer containing a radiation source and a photodetector, a test sample, characterized in that the radiation source is made in the form of a laser equipped with a photo shutter and aperture, optically connected to the first plane-parallel semitransparent glass plate mounted at an optical axis angle of 45 k, with an eyepiece and a second a plane-parallel translucent glass plate, a system of two flat reflective mirrors mounted at an angle of 45 ° to the optical axis, then install Lena is the third plane-parallel reflecting glass plate at an angle of 45 k of the optical axis, forming an angle of 90 s with the plane of the last reflecting mirror, and after the third glass plate there is a microscope objective and the sample under study, while part of the optical radiation is reflected by the third glass plate onto the third reflecting mirror and interacts with the eye of the observer, and part of the radiation reflected from the test sample is reflected by the second glass plate to the first diaphragm and the first photodetector And the other part is reflected first optical study of the glass plate on the diaphragm and a second photodetector.

Description

LASER MICRO-REFLECTOR

The utility model relates to the field of laser measuring equipment and can be used to measure the spectral reflectivity of diagnostic objects.

A device for measuring spectral composition containing a radiation source, a test sample and a photodetector (see "Physical encyclopedic dictionary, M., 1995, p. 705).

However, this device has a significant drawback. It does not allow a qualitative and accurate study of the spectral reflectivity of biological objects.

The technical problem solved by the utility model is to ensure the quality and high accuracy of the study of the spectral reflectivity of biological objects.

The indicated technical problem is solved by the fact that in the laser microreflectometer containing a radiation source and a photodetector, a test sample, the radiation source is made in the form of a laser equipped with a photo shutter and aperture, optically connected to a first plane-parallel crawling glass plate mounted at an angle of 45 to the optical in this case, the eyepiece and the second plane-parallel translucent glass plate, a system of two flat reflective mirrors mounted at an angle of 45 to the optical axis, then a third plane-parallel reflecting glass plate is installed at an angle of 45 to the optical axis, forming an angle of 90 with the plane of the last reflecting mirror, and after the third glass plate there is a microscope lens and a test sample, while part of the optical radiation is reflected by the third

2002120748

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a glass plate on the third reflecting mirror and interacts with the observer’s eye, and part of the radiation reflected from the test sample is reflected by the second glass plate to the zero aperture and the first photodetector, and the other part of the optical study is reflected by the first glass plate to the diaphragm and the second photodetector.

The proposed device is illustrated by the drawing shown in FIG. 1. The proposed device contains a radiation source made in the form (Fig. 1) of a laser 1 equipped with a photo shutter 2 and a diaphragm 2 optically connected to the first plane-parallel translucent glass plate 4 mounted under a rear 45 ° to the optical axis.

Next, an eyepiece 5 and a second plane-transparent plate 6 are installed, a system of two flat 7, 8 reflecting mirrors mounted at an angle of 45 ° to the optical axis. Next, a third plane-parallel reflective glass plate 9 is installed at an angle of 45 ° to the optical axis, forming an angle of 90 ° with the plane of the last reflecting mirror 12. After the third glass plate 9, a microscope objective 10 and a test sample 11 are installed (Fig. 1).

A part of the optical radiation is reflected by the third glass plate 9 onto the third reflecting mirror 12 and interacts with the eye of the observer 13. A part of the radiation reflected from the test sample 11 is reflected by the second glass plate 9 to the zero diaphragm 14 and the first photophosphor 15.

Another part of the optical radiation is reflected by the first glass plate 4 to the diaphragm 16 and the second photodetector 17.

The proposed device is designed to measure the spectral detachability of biological objects.

To measure the reflectivity, it is necessary to point the device at the studied port 11, to irradiate 1 and register the reflected radiation using element 17.

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The measurement method is based on a comparative method. It consists in the sequential study of the laser (or other source) of the test sample and the standard standard and registration of reflected radiation, the ratio of the signal received from the test sample to the signal from the standard, proportional to the spectral reflectivity of the sample at the wavelength of the probe laser. Laser power should be significantly lower than the irreversible exposure.

To implement the method, it is necessary that the laser axis and the axis of sight coincide or make up a small (a 5) angle.

The field of view of the photodetector and the laser beam must match. Moreover, the area of photographic registration should not exceed the area of laser radiation.

To measure reflectivity, it is necessary to point the device at the studied area, to irradiate and register the reflected radiation. Exposure is made using a petal shutter with a set of shutter speeds.

Calibration of the device is carried out according to the standard MS-20 - “White body, the spectral characteristics of which are well known. To do this, the device is aimed at the standard and the magnitude of the electrical signal is adjusted, corresponding to the laser wavelength.

The proposed device will increase the accuracy of measuring the spectral reflectivity of biological objects, including the eyeball.

Claims (1)

A laser microreflectometer containing a radiation source and a photodetector, a test sample, characterized in that the radiation source is made in the form of a laser equipped with a photo shutter and aperture, optically connected to the first plane-parallel semitransparent glass plate mounted at an angle of 45 ^o to the optical axis with an eyepiece and the second plane-parallel translucent glass plate, a system of two flat reflective mirrors mounted at an angle of 45 ^o to the optical axis, then set A third plane-parallel reflecting glass plate at an angle of 45 ^o to the optical axis has been updated, forming an angle of 90 ^o with the plane of the last reflecting mirror, and after the third glass plate there is a microscope lens and a sample under study, while part of the optical radiation is reflected by the third glass plate on the third a reflecting mirror and interacts with the observer’s eye, and part of the radiation reflected from the sample under study is reflected by the second glass plate on the first diaphragm and the first photope iemnik, and another part is reflected first optical study of the glass plate on the diaphragm and a second photodetector.