SU584710A1 - Range finder for radiation fields - Google Patents

Abstract

RANGE FOR RADIATION FIELDS, containing an optical system for projecting an optical sighting device on the irradiation field, characterized in that, in order to simplify and speed up the distance measurement process, an additional optical system, installed at an angle to the optical system projecting the reticle, and equipped with field-projected irradiation digitized scale.

Description

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 The invention relates to accelerator technology and can be used to measure the distance from an ionizing radiation source to the object being irradiated.

Devices are known that are designed to set the distance between the extent of the output device of the particle accelerator and the object being irradiated. The devices allow you to set a fixed distance, determine the center of symmetry and the size of the irradiation field. .

A rangefinder for radiation fields is also known, which contains an optical system for projecting a light sighting device onto the irradiation field.

The described optical rangefinder is convenient to use, but the distance measurement process is time consuming and difficult due to the removal of the reference scale of the measured distance from the observation point of the range finder setting, which increases the distance measurement time and reduces the accelerator throughput.

In order to simplify and speed up the process of measuring the distance between the target and the object being irradiated, a complementary optical system was installed in the proposed rangefinder, installed at an angle to the optical system projecting the viewfinder and equipped with a digitized scale projected onto the irradiation field.

The drawing is a diagram of the proposed device.

Target 1 and collimator 2 create a directed stream of bremsstrahlung with an axis of symmetry along the AOB line, falling on the H plane - the surface of the irradiated object, light source 3, condenser 4 and objective 5 create an image on the H plane of the digitized scale 6, and the optical system 7 projects on the field of irradiation of the light beam 8.

The device works as follows.

Scale b using light source 3, condenser 4 and lens 5 is projected onto an imaginary axis of symmetry of the AOB floor. To improve the clarity of the image of the whole scale b, the AOB scale is located

5 obliquely to the optical axis of the lens 5. Thus, when the position of the irradiated object changes within the limits of the AB segment, the image q of the scale b remains clear. Optical

0, system 7 creates, on the plane H, a light beam 8, which is perpendicular to the projection line of the bis scale by intersecting them along the line of BWO. The point of intersection of the projections of the scale b and sighting 8

5 is the reference point between the target 1 and the plane H on the scale 6 and the center of symmetry of the irradiation field.

The use of the described device makes it possible to determine the measured distance directly on the scale without any additional operations, which shortens the time of preparation of the accelerator for irradiation and facilitates the operation of the oparator. As a result

5 increases the efficiency of use of accelerators, i.e. the possible number of patient packings at the medical accelerator and the number of checked parts increase

0 on the flaw detector.

Claims (1)

RADIOMETER FOR RADIATION FIELDS, containing an optical system for projecting onto an irradiation field, 1 light detector, characterized in that, in order to simplify and speed up the process of measuring distance, an additional optical system is introduced into the rangefinder, installed at an angle to the optical system projecting the sight and equipped with a digital scale projected onto the irradiation field.