SU364268A1 - - Google Patents

Description

one

The invention relates to the detection of electromagnetic radiation in the Dianzone infrared-microwave (IR-Microwave) wave and can be used for qualitative observation and quantitative measurements of the spatial distribution of radiation fields received from both monochromatic and iono-chromatic sources.

For the near infrared region, at present, a number of devices are known that give a directly visible image of the radiation field. Odiako oppe peppe allow you to record the radiation, velpchina kvapta which mepe threshold of the photo effect, i.e., wavelengths of more than 1.3-1.5 microns. At the same time, in a matter of times, the task of registering the zeros of longer wavelength radiations becomes very important in connection with the creation of a number of new sources (like pappils, quap jpeterator) and instruments of millimeter n submillimeter ranges and the expansion of their practical application.

The described labels are paired with the temperature of the oh-sensitive lyu.1 oforov. LOCAL S Y AGRREV L10 IIISTSE CSO

Screw radiation is caused by a glowing candle and, in) ultraviolet excitation (thermographer effect). Observe the image of the distribution of the density of the radiation energy, and of the radiation, both visually and when photographing with subsequent photometry or using other methods of recording the video radiation.

Extract the device for receiving the visible image of radio emission of millimeter diazop. In it, a phosphor screen in the form of a single plasginka of tolgcine 5 area O (2X3) cm-1 is deposited on it with a thickness of 1 k, and the O layer is coated with a phosphor layer (ZnS CdS-Ag Ni), which has a thermographic effect. When excited by an ultraviolet radiation of an ominofor screen, it shines, and in places where radio emission falls from a millimeter dianazone, due to its absorption by a thin layer of al omini. a substrate and a phosphor oce luminophore, which causes the luminescence of the luminescence of the information screen.

Thats that the basis of the screen is mica on plastic. It does not allow him to fabricate an area of more than a few square meters. and this limits the maximum iy o WAVE of the radiation of this radiation. It is extremely difficult to fabricate a screen of 5 k, which puts a limit on sensitivity in the ipolo mode and for mini,; -,:;: (nn h; M1i ijust i ioi time. Projjp); ((: - pk1 ecrp ;; Kpaiine iieiCxiLOJiorii; i;:;: lp:) () 1,:,;; p.: K;: h rasspsp / jujie pa pa; p pcujiibie ely and manual production, ijioo ..,; .; n (mch) timep and gives the bo; The first count :,; ei i: u) of Iraq, and combing the front of the player, often limits the possible lipf) of such screens.

Cro. oh-hugo uteroistio is inconvenient in work and it provides for; l nrn nsstvovke iln debugging uetanovk.

The clarity of the image on the screen does not matter H3-: jai air; 1st of ambient airflows. The brightness of the display and the temperature of the chuvetvp l / lyust) of the screen is away from the temperature of the silence. With Egol L OM, the nofor (especially in) does not work in favorable conditions: ix. ta; ka) -: he usually possesses makenmal1; s; h 1 wiwi ghost esfect in the area of those: -. Temperatures above 25 ° C.

The goal of the present invention is to create .gl-: for the most advanced, technological, and reliable 1: 1: 1- :, but not the best for both the qualitative and quantitative data on the nanotrac1BeiiHO,: the distribution of the fields is radiated ;: all I-iK-UHF Dianazonah (O. EC - 100 cm).

G (n-taped nkl is achieved by the fact that in 1); e tenloisol1); 01 base of the luminescent - :: ntn () g (; screen; thin sigggietic nle is used (n-a-1, nannrnmer lavsiovvsh, and from the outside of the mechanical and thermal and) here; 1 of the screen and placed in a cassette, in the K: h; role: to be stabilized at the mercury temperature. cooTBeieTByiOiuasi is optimally sensible;

I agree: I am acquiring as a tenloisol 1ru: o1seto se: 1oz: n luminescent screen at the place.:; 1; oi nsvncnki use this; ku; o c: i; i; TCv:;: ec ;; yio clapboard, and ananrimer laveai; oiiy; u, tslschyyuil from;; -j I);},; to. From such a nlenk: - .Z1oto1; l5 :: from o ;. ;; (one single screen;;: BOLL: o; u; c: Epe-i; o; o size (on the example of, I), io: - i {; j. S. :). , C, DTOII targets nlenku nat gnBa: from gh clips “ntsy.

For d.alne1N1; e1H) increased: 1; l e (:; :) ек; PMyunIlnad-: and IpHeMCHKa (up to::. ;; l:: lx square meter (in) and increase in i & p regnetr:; ruell) r;; 1knh screens, sc) ei.: | En1h, ianrimer, but like honeycombs in hj, yio shells of a given area. Production n. the screens of such a tina are very simple and be “/ discharged using the method; The cost of thin synthetic nneokokki Coca i their production is mastered in Lynx quantity.

For:; It1 screen from the external mechanical network 1-about the impact and place it in a cassette e transparent windows for passing radiation through them (recorded PC, UHF-will, ultraviolet excitation and luminescence), also worn from thin synthetic tapes 1 to 100 microns These protective films are tensioned, for example, in metal caps.

Phosphor screen roll roll with zanditi tape from a distance of 1 to 50 mm

from protective ilenok.

To ensure maximum sensitivity and stability in operation, the average temperature of the screen must be different (20-70 ° C), corresponding to the optimal conditions. For this purpose, the screen cartridge is supplied with an heater and a temperature sensor with a controller that maintains the desired temperature.

In order to maximize the sensitivity of the receiver, the absorbent metal layer applied to the tenloisolating synthetic lamination is chosen so thick that it has a maximum absorption coefficient, namely, its thickness must be less than the skin layer of the observed radiation and less than the free length run of electrons in a thick piece of this metal. For different metals, this thickness is in the range

about

10-100 A. However, in special cases, it is more expedient to use receivers, the screens of which have a small absorption and reflected electromagnetic radiation (even if this corresponds to a significant reduced sensitivity and receiver). So situations arise, panrimer, when studying the structure of zero in open resonators, where it is essential that the screen

The receiver numbered inside the resonator did not distort the structure of the floor. The regulation of the thickness and an impregnable patch of the insulating sieve coating of the metal non-absorbing layer makes it possible to create screens with predetermined values of absorption and reflection coefficients from the luminescent screen.

Pa figs. 1 shows a fluorescent screen, FIG. 2 - protection cassette with zakreileinym in its luminescent screen. This application contains a screen made in the form of a heat insulating OS1K) wah 1 from a thin lavsan film with a metal substrate 2 that absorbs the detected radiation, the layer of which is applied to the layer 3 of a heat-sensitive phosphor. The 4 clamps 4 "clamps" tightens the scraps 5 and places them in a cassette that has a metallic root 6, metallic

rims 7, 8 of type “plates, transparent windows of thin synthetic lambs 9, 10, cut screw 11 for fixing the position of the lumipophor screen 5, heaters 12, 13, temperature sensor 14, thermostatic

ycTpoiicTBO 15.

The receiving luminescent screen (Fig. 1) consists of a thin synthetic lamination having a small heat capacity, for example, lavsan, stretched on the sides, made of a heat-insulating material, for example, getinax. A vacuum layer of a metal (for example, aluminum) is deposited on this film in vacuum, the thickness of which corresponds to the most efficient energy absorption in the whole of the JK-UHF range (thickness 10-

about

100 A). If, according to the working conditions, it is reasonable to have not the maximum value of the absorption coefficients, but other values of the absorption and reflection coefficients, then the thickness of the applied metal layer should

about

be between 2-500 A. A metal layer can be applied on both sides. If the receiver is intended to operate in the infrared range, other known absorbing substrates, such as platinum and gold mobile, can be used.

Temperature sensitive phosphor. For example, LnS CdS-AgNi is applied with a thin layer (1-5 microns) to the surface of the film. plated.

In order to reduce the heat removal from the screen by irregular air streams, it is placed in a protective cassette (frame 2), the wall distance of which to the screen is 1-50 mm. This significantly reduces image distortion and also slightly reduces the threshold power of the recorded continuous radiation. In addition, the protective films of the cassettes protect the screen from mechanical damage and the direct influence of the room temperature on the brightness and sensitivity of the screen. Cassette windows are made of materials that are transparent to the recorded ultraviolet and visible radiation passing through them. For this purpose, for example, the same synthetic films of somewhat greater thickness, stretched on metal sheets, are used.

The cassette is equipped with a heater m and a temperature sensor with a temperature controller that maintains the average screen temperature at a given temperature value.

The proposed receiver works as follows. The luminescence of the receiving screen is excited by ultraviolet radiation, for example, from mercury lamps with filters that cut off the visible light source. On the screen, a uniform visible glow is observed, for example, in the yellow-green region of the spectrum. Then, the received radiation is fed to the receiving peak, which is absorbed in the metal layer and causes local screen heating. This causes the development of temperature quenching of luminescence, corresponding to the spatial distribution of the intensity of the studied field of PC-microwave waves.

The proposed receiver allows to register the distribution in space as

the amplitude and phase of the radiation being investigated.

Amplitude measurements can be made for both monochromatic and non-monochromatic (e.g. thermal) radiation. The pa screen serves the detected radiation and conduct a visual observation, photographing or other recording of the change in the intensity of the glow on the surface of the luminescent screen, which corresponds to the spatial distribution of the density of the intensity of the recorded radiation. In this case, depending on the particular ultraviolet radiation pattern, exposure to the radiation under study and the observation of the image can be carried out on either side of the screen. Processing of the results can be either qualitative, that is, establishing the configuration of the recorded field, or quantitative, that is, determining the absolute values of the intensity of the field at each point in space.

In the latter case, the receiver is pre-calibrated. For this purpose, for example, photometry and comparison of images obtained for the reference and investigated sources are made.

To study the phase structure of the floor of a monochromatic emitter, it is necessary to divide the beam, for example, into two channels, and 1: 1: interference between the studied and reference beams. By placing an object in one of the channels, one can observe the changes in the original interference pattern, which they evoke. Such interferograms are the basis for obtaining holograms.

The proposed receiver can have wide practical application in modeling electromagnetic fields of kabrugartptnyh reflective, scattering and transmitting systems in the microwave range, setting up and adjusting equipment and sources of PC-microwave ranges, for tracking diagrams of radiating systems, for control of modes, as well as for defectoscopy and introscopy, image transmission, location, etc. It is promising to use such receivers for holography in a wide range of wavelengths: long-range PC, in submillimeter, millimeter and microwave ranges.

Subject invention

55

Claims (3)

1. Receiver for visual observation and recording of electromagnetic radiation, containing a receiving screen made in the form of a thermally insulating base with an absorbing metal plate, on which a layer of heat-sensitive phosphor is applied, and a source of ultraviolet excitation, providing a luminescent phosphor, about l and h a y u u and so that, with a view increase the range of working wavelengths, a set of receiving screen is made of protective cash elements, a lath -1x in a network with a window.mk of transparent film, for example a lavsan stretched on clamps and fixed in a cassette, and the cassette is equipped with a heater with a controller that maintains the temperature, providing the maximum thermographic phosphor effect. 2. The receiver according to claim I, characterized in that, in order to increase the sensitivity, the thermal insulating base is made of a synthetic film, for example, mylar, uniformly tensioned pa clips. 3. Receiver but np. 1 and 2, characterized in that the thickness of the metal substrate ki is 2-500 A. Fig 1 fj b