UA129651U - DEVICES FOR DETERMINATION AND DETERMINATION OF ANGLE COORDINATES OF LASER RADIATION - Google Patents

Abstract

Device for detecting and determining the angular coordinates of the laser radiation includes an optical system for directing laser radiation at the photodetector and the information processing unit. A volumetric matte screen is mounted before the optical system such that the distance from the middle of the optical system to the closest point of the screen is greater than the focal length of the optical system, and the photodetector array mounted in the focus of the optical system is used as the radiation receiver.

Description

The useful model belongs to laser technology and, in particular, can be used when conducting dosimetric control of laser radiation by the sanitary and hygienic supervision service, for product testing and certification bodies, organizations and medical institutions that develop, produce and operate laser technology.

The design of the device intended for determining the angular coordinates of the viewing axis during dosimetric control is known (11.

The device contains an optical system that directs laser radiation to a radiation photoreceiver, angle-rotating and angle-measuring devices fixed on a tripod, and an information processing unit.

The principle of operation of the device is based on measuring the intensity of laser radiation at control points in the room. The direction to the source of radiation is determined by the location of the receiver in the direction of the maximum value of radiation intensity when scanning the space in two mutually perpendicular planes.

The main disadvantages of this device are its bulkiness and complexity, which is caused by the presence of mechanical scanning nodes. The complexity of the adjustment leads to a large expenditure of time, which, in turn, increases the cost of the conducted dosimetric control. And in addition, the device does not provide complete control, since other, weaker sources of laser radiation that occur when the main laser beam is reflected from walls and equipment may remain undetected.

The closest to the proposed useful model is the device for measuring angular deviations of the axis of the laser radiation directional diagram |21, which was chosen as a prototype.

The device contains an optical system that directs laser radiation to a photoreceptor of radiation, and a unit for processing information received from the photoreceptor.

The principle of operation of the device is based on measuring the displacement of the laser beam in the focal plane of the positive lens. At the same time, the amount of angular deviation of the axis of the beam of laser radiation is directly proportional to the movement of the laser beam and inversely proportional to the focal length of the lens.

The disadvantages of this device are that it is intended only for measuring the angular deviations of the axis of the laser radiation pattern and cannot be used for

From the detection and determination of the angular coordinates of laser radiation coming from different sides to the location of the measuring device.

The basis of a useful model is the task of improving the design of a device for detecting and determining the angular coordinates of laser radiation, in which, thanks to the use of a three-dimensional matte screen and a photo-receiving matrix, it is possible to simultaneously detect laser radiation coming from different directions to the place of dosimetric measurements. This simplifies the design, shortens the time of detection and determination of the coordinates of the laser radiation source, which ultimately improves the technical characteristics of the device and reduces the cost of dosimetric control.

The task is solved by the fact that in the device for detecting and determining the angular coordinates of laser radiation, which contains an optical system that directs laser radiation to a photoreceptor of radiation, and an information processing unit according to a useful model, a three-dimensional matte screen is installed in front of the optical system in such a way that the distance from the middle of the optical system to the nearest point of the screen was greater than the focal length of the optical system, and a photo-receiving matrix installed at the focus of the optical system is used as a photoreceptor of radiation.

Figure 1 shows the diagram of the device, which includes: 1 - optical system; 2 - photo-receiving matrix; C - information processing unit; 4 - volumetric matte screen; 5 - laser beam falling on the matte screen; 6 - projection of the point of incidence of the laser beam onto the photo-receiving matrix.

The device works as follows. In the room in which work with the laser is carried out, control points are marked, a zero reference point is chosen and a device is installed to detect and determine the angular coordinates of laser radiation. After turning on the laser, its radiation can, for example, fall to point 5 on a three-dimensional matte screen.

At the same time, other radiations from the same laser can get on the screen, for example, reflections from walls or equipment. Conical or pyramidal screens can be used as a three-dimensional matte screen. The dimensions of the screen are chosen under the condition that the distance from the central point of the optical system to the surface of the screen should be greater than the focal length of the optical system. This is necessary so that the size of the image of the laser spot 5 on the screen decreases on the surface of the matrix 2 (point b in figure 1) III). In this case, the accuracy of determining the position of point 6 on the matrix increases. The photo-receiving matrix C is set at the focal length of the optical system. Either a separate lens or an objective can be used as an optical system. According to the optical scheme of the device for detecting and determining the angular coordinates of laser radiation, parameters and sizes of all elements, according to the position of the image of laser spots on the photometric matrix, using the information processing unit C, it is possible to determine all directions of laser radiation in the room for further measurements during dosimetric control.

Thus, the proposed design of the device for detecting and determining the angular coordinates of laser radiation allows simultaneous detection of laser radiation coming from different directions to the place of dosimetric measurements. This simplifies the design, shortens the time of detection and determination of the coordinates of the laser radiation source, which ultimately improves the technical characteristics of the device and reduces the cost of dosimetric control. The device can be used for dosimetric control of laser radiation by the sanitary and hygienic supervision service, for product testing and certification bodies, organizations and medical institutions.

Sources of information: 1. GOST 12. 1. 031-81. Group T 58. System of labor safety standards. Laser.

The method of dosimetric control of laser radiation. Moscow, 1981. 27 p. 2. GOST 26086-84. Interstate standard. Lasers. Methods of measuring the diameter of the beam and the deenergizing divergence of laser radiation. Moscow, 1984. 14 p. 3. Eisenberg Y.B. Lighting equipment. Moscow: Znergia, 1980. 464 p.

Claims (1)

USEFUL MODEL FORMULA A device for detecting and determining the angular coordinates of laser radiation, containing an optical system for directing laser radiation to a photoreceiver and an information processing unit, which is distinguished by the fact that a three-dimensional matte screen is installed in front of the optical system in such a way that the distance from the middle of the optical system to the nearest points of the screen was greater than the focal length of the optical system, and as a receiver A photo-receiving matrix installed in the focus of the optical system is used for radiation. E I: KE, яку Fig.