DE1524711A1 - Method and apparatus for recording and reading data - Google Patents

Description

20 935

DK. I. M. MAAS

DR.WG PFEIFFER f AT E HiA NW Ä LTB MO HC ■■ ' EM 21 UNGER £ RSTRA3SE 25

American Cyananiid Company V / Ayne, New Jersey, V * St ₀ A,

Method and apparatus for eating and reading

of data

The invention relates to a verbeaaertea method sun Lee «jt or retrieval of coded information using photolutainic substances and further a device and electrical circuits for these o

In the German patent application A 51 784 IXo / 21a1 ice

Building

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Method and device aura recording and querying ▼ on information with the help of photoluminescent substances described. Various symbols, such as 8.B. Numbers indicating the presence or absence of photoluminescent substances. Four different photoluminescent substances allow 19 different symbols according to the general formula 2 ⁿ - 1, where η is the number of photoluminescent substances. Hit larger numbers of coding substances t & an can reproduce even larger numbers of different symbols. For example, with six different photoluminescent materials, 36 symbols can be distinguished from one another. Tile different coding colors contain the necessary material solutions which fluorine in certain colors under ultraviolet radiation.

The code is created by illuminating it with ultraviolet light and by determining the presence or absence of certain luminescent substances with one of its radiation detectors. The detectors have filters or other spectral separation devices so that each detector only anaprioh on the area of the ole long, the correspond to the particular substance. Among the favored photoluminescent substances, which in the above-mentioned

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are complexes of rare earth metals old with an atomic number greater than 57 »which are usually referred to as lanthanides» the complexes «such as SoB. Chelates are made with various organic ligands formed, which excite the lanthanide ϊθη under ultraviolet radiation, so that it comes into a metastable Klektroneneustand from the daa chelated lanthanide ion can emit a photon with an energy equivalent to that of the transition bu to a lower electron level dta η - corresponds to latiated ions ο This emission takes place in a very narrow l / ellen length «

Usual fluorescent substances, such as diphenyl anthracene, have a fairly broad range of fluorine essences, diphenyl anthraeas β · Β · fluorinated with a maximum in the blue, but the emitted energy extends into the green and violet range · A somewhat better organic fluorine ·· * ying substance 1st 4,5-3) iphenylluidaeolon-2, which is a slightly cheaper one. Has pluoreesence band and responds to ultraviolet light like the lanthanide ohelates. Even old Fluoresseius the radiation of ohelatlsierten Lanthaniflen ions, which has a sharply defined · narrow bandwidth, difficulties arise because the ^one .fellenlangenbereioh · "anohmal su close" lie down together and a certain flberlappung ER-

BATH ORIGINAL

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follows · Of course, the difficulties and co-operations with common fluorescent substances such as g.B. Biphenylanthracene, which radiate in much larger Vfelltnlttngenberelohen, even bigger

The aim of the invention is to improve the interrogation or reading of information in Codler colors as it is in the in the same patent application A 51 7S4 IXo / 21a 1. With an electrical method according to the invention a sharp separation of the signals not only because of the Wavelength range of the photolutainic radiation, but also on the basis of the relative luminous intensity or intensity, based on a known radiation source, and on the basis of the decay effect of the radiation after excitation with ultraviolet or other short-wave light obtain·

It is necessary to take into account that the signals generated have a high level of noise, i. E. a definite sharpness and reliability with which the signal indicating the presence or absence of a particular component can be distinguished from other signals that arise and can be viewed as noise. The invention In one respect it has a greatly improved RauBoh distance

0Ό9828 / 1386

zur Polge and enables not only a clearer and more accurate reading of the coded symbols, but also the use of more than one substance with a wider one Pluoreezentsspektruflu kit other ports, the invention reduces the inaccuracy caused by the overlapping of the bands of the different photoluminescent This overlap originated in the final fabrics Output signals are perceived as a kind of noise or interference signal

Various photoluuineaeierenden substances emit radiation, which decay at different speeds after illumination with short-wave light, which continues as ultraviolet lighting, although in certain cases short-wave light, such as a.B. blue or violet light or even radiation with an even shorter wavelength than the ultraviolet can be used. Said the exact wavelength of the exciting radiation is not of importance here, the invention is described for cases in which the excitation of the photturainetic Substance is made by ultraviolet light.

The lifetime or time constant of the photoluminees * is usually defined as the time within which the

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The photoluine-generating radiation is at one point equal - the initial intensity has dropped after the end of the excitation. This time constant is referred to below as sit f · ttr most purposes the reciprocal value Ton 7 is more suitable and this is denoted by k. Spilled photoluinsing substances have T values in the range of only 10 "** seconds (diphenylanthracene has a T in the order of magnitude of 10 seconds) to milliseconds or larger fractions of milliseconds. Certain inorganic photoluining substances are known to be even larger Have T values that go up to seconds or even minutes or hours. However, some of the most common photolululant substances that are suitable for the purposes of the invention are either organic fluoro-reactive materials, such as diphenylanthracene with a very small T or lanthanum complexes with values of T On the order of 1 millisecond or large parts of a millisecond.

In the case of photoluraine, the invention differentiates between "decorative materials awiflohen on the one hand their tent contantants and others" seldom their relative intensities. With this distinction it is not possible to have sharply separated, very narrow bands of the photoluine radiation of the different

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Above substances at · Κα is at least theoretically nSglloht In Use large bandwidths of photolutainic substance which differ in relation to the wavelength range of the radiation any overlap. Ks is a feature of this foundation, discrimination based on time or relative Intensity in the case of spectral differentiation on the basis of the wavelength of the light · This increases the sharpness of separation or others can be seen.

The reading illumination with ultraviolet light takes place la general with awel kinds of lighting equipment, after a so-called constant lighting, like Ä.B. a “Queokeilberdampfbogen” or a “WeoheelstroBBO-modulated noble gas discharge tube”, or an etoB-like one Lighting as s «B. Flash discharge tubes like xenon tubes The curves of the first-mentioned lamps, which reflect the dependence of the intensity on time, range from straight lines that run parallel to the time axis to the complex but periodic waveforms below a combination of spectral separation and separation due to the decay time or due to this invention

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• * rt Q do

152A711

suitable. A common method of achieving a time-dependent illuminance is to generate a time-dependent current flow 2SU of a Larape. This time-dependent Strora may be a modulated direct current, such as "B · be a DC component, the approaches a v.'echselstromkoiaponente an amplitude is superimposed, the not larger than the DC component 1stο Certain xenon discharges with high intensity can be operated in this manner, Bin permanent Equal flow improves the stability of the discharge. The current can change direction over time, e.g. an alternating current · Mercury arc lamps are often fed with alternating current «These lamps are referred to as lamps which are fed with a periodic, time-dependent current, since the time variation is essentially repeated»

The invention is explained in more detail with reference to the drawing, for example.

Figure 1 shows the scheme of an electrical circuit for a reading with constant illumination "

Figure 2 shows sohematlsoh a device for Erseugen τοη Lighting pulses

- BAD Cni-QIMAL.

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In the circuit according to FIG. 1, a pilter circuit 20 is at A with the output of a measuring device, for example one Photomultiplier tube connected. The electric bell sound the substances that are produced by a sinusoidally modulated xenon * Discharge tube is illuminated »is connected to a low-pass filter, which consists of an inductance 1 and a large capacitance 2 exists and has Aualaüleitungen B, and to a HochpaOfliter with a smaller capacity 3, a rectifier 4 and a smoothing filter consisting of a resistor 5 and a capacitance 6 and an output line. lays. The fourth for inductance 1 and capacitance 2 are chosen ho »that practically no“ eoheeletroacoaponents pass ”but only the constant qleiohstroesignal coaponents. The signal that the filter at 5 and 6 leaves, provides the rectified and smoothed "signal from the alternate part of the Luoineeaenaintensitäten τοη two components # 1 and # 2 represent that of the xenon lamp have been irradiated.

The output can be sent to instruments such as 8.B. ordinary equals ro raiaeöger ft te, and it can be mathematically g - It is believed that when you look at a color, its components have a time constant which illuminates with that of the filter Uberelnetimut and then the relationships between the

BATHROOM Cn'-CINAL

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gftnge (doh. daa ratio of the alternating current to the direct current signal) establishes, a positive identification is obtained "Me luminescence" ie the signal at Kingang A follows the excitation in such a way that the time constant of the substance can follow this excitation. Y / hen she can't follow, will the time-dependent output is greatly weakened and only the constant filter output in line B responds.

The discrimination or the Hauschabetand can of course be further improved by some simultaneous spectral separation «Eg« component Nr »t a samarium complex with a value of k of about 10 seconds" * and component Nr «2 ei» europium coaplex with a value of k of approx. 1 (r information. An optic broadband filter enables lurain-emitting radiation to hit the photodetector in the range from 5750 8 to 6550 X. Luminescent radiation from a samarium complex in this area consists mainly of two bands at about 5980 R and 6420 % and from a Kuropium-Kowylex mainly from one band at about 6120 R. The simple broadband filter enables both tfamariuo lurainescence bands to contribute to the measurement, while the different time dependence of the two luminescence components enables a differentiation » whether they are present or

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not * Of course, the absence of both components will indicated by the output of both lines B and C zero

Figure 1 shows a circuit that can be used # if the lighting is provided by a rectifying lamp such as a mercury arc larape luminescentβ component diphenylanthracene has a k value of about 10 seconds "and the second component is a terbium complex with a k - '. fcrt of about 1 (r seconds" "is present in the event that a lamp with a current of 400 Hertz, the first component is negligible to the same tr ocaeignal on the photodetector. First, component no.1 is illuminated and the output signal is received on line C. On line B occurs only a small output signal. Component no.2 is then illuminated and the signal on line B is in essentially a direct measure of the presence of component 2. The ratio of the rectified Vecheeletrona signal on line G to the signal on line B then determines the ratio in which both components Xr «1 and Hr.2 are present, and in fact, using several known mixtures of components # 1 and # 2 a continuous Riehkurve in different ratios.

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> - 12 -

be obtained as long as the 1st valid iet _t ale some of the component Hr.2 present. In the case of the practical absence of an ο direct current signal on line B, the alternating current signal on line C clearly increases that only the component Kr. 1 is present »

In the example used above, the contribution of the higher harmonics to the AC signal for component # 2 falls rapidly, but for component # 1 it falls very slowly. In practice it is easy to make more complex electrical Build filters, such as bandpass filters, that separate different frequencies more sharply, so that the proportion of higher harmonic vibrations as a further means for the Discrimination or differentiation between luminescent components can be used «This becomes very important when more than two luminescent components are involved are·

Me methods with constant illumination, which were described in Zueameenhang with Figure 1, were carried out using a modulation frequency of 1000 Hertz for the Xenon discharge or a power source wit 400 Herts fttr the arc of meroksilver explained · Other frequencies can can be used, and it is an advantage of this

, HAr \ nB !. »! κι 4r

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That the best frequency can be chosen for any particular application. The choice of frequencies can depend on the time constants of the luminescent substances and it is also possible, with suitable electrical filters, to operate the system as a frequency-scanning device which digs through a sequence of frequencies one after the other Such a more complex codification can be used if the type of symbols justifies the additional effort. A simple, cursory representation is sufficient for this * Assuming there are three photoluainescent substances present, riner has a time constant of about 10 ", another has a time constant of 10 ³ and a third has a side constant of 10" ^. If a single frequency is used, e.g. 1000 Herts, then there is a sharp separation between signals from the component alt of the time constant of 10, but the other two more or less coincide. However, if sampling circles or other time-dividing circles are used, one frequency being 1000 hertz, the nearest being 10,000 hertz, and the third being 100,000 hertz, an eoharp is produced

Separation also between the components with the time con-

-7 -S etants of 10 and 10.

* Figure 2 shows a different design in which the

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agitating «radiation is generated intermittently instead of a continuous alternating current» e.g. with a xenon blit tube 7, which is operated in a circuit which causes the tube to flash after receiving a signal. The Luuineftzena-Ktrahlttng from the coding color at the point 8, which has the Kotaponenten to be determined, is then spectrally separated, for example with a prism or grating that spatially subdivides the radiation · In Figure 2 This dispersion is shown by means of a prism 9. A rotating disk 10 is synchronized with the xenon flash and has a series of slots 11 in its rim. Sin one of its radiation detector, which is indicated by a phototube 12, receives the radiation through the Fills slots. Me shock discharge of the lamp 7 1st with the rotating disk is synchronized by light from the light source 13, which generates a signal from the phototube 14 every time an itohlitz 11 passes in front of it, which causes the bezel 7 to flash once every second or higher signal from the phototube U. The respective sequence of the flashes is determined by the electronic hold of the power source for the flash lamp Circuits, as they are known, are not shown, e.g. an ordinary flip-flop can be used to ignite the lightning bolt used on every other signal. The place of the source

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le 13 on the phototube 14 along the periphery of the disc is adjustable, Uta the appropriate synchronization cause · Assuming that the arrangement of the slits and dl · Rotation of the disc so coordinated that the Slits sample the radiation at 500 microsecond intervals and each slit through a spectrum, i.e. through blue, green and red in about 200 microseconds and it is assumed that the duration of the flash is about 299 'jicroseconds, if two components, ^ iphenylanthra-

-8th

cen old a time constant of about 10 seconds and a Terbium complex with a time constant β of about 1 millisecond, the diphenylanthraene only through the Shiite « perceived, which is synchronized with the xenon flash The next slot, which kouut about 500 microseconds later, does not receive any energy from the diphenylanthraene. The slit, which is synchronized with the green radiation from the prism, which corresponds, for example, to the luminescence of terbium, gives a signal and in the same way the next tiohlitä, since the terbium complex has a decay of of the order of 1 msec or a little lessIn other words, two slots respond to the terbium, whereas the green part of the Diphenylantbraoen-Luaineezens only has a single cover. the Overlapping is therefore not a particular problem »

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since "if a time-dependent reading is used, we" E.g. with the help of an oscilloacope the Teibium through swei Lines or signals are reproduced on the oscilloscope » whereas mphenylanthracene only in the place "the de" blue corresponds to »The green line from the Phenylanthracene appears only in the form of a single line to the side where the flash of light actually takes place, because of the extremely short decay time of the luminescence dee Mphenylanthraeeas dar

Kin prism or other devices to separate different spectral ranges of the luminescent radiation into one physical displacement is shown in J'igur 2 · This device has proven to be very satisfactory « However, a similar result can also be achieved without having to pay off Dispersion can be obtained »E.g. this result can be obtained» meanwhile an image of the lura-relevant area on the surface of the calibrating disk in one radial distance from the Witte of this disc is generated, which corresponds to the radial distances of the slots, each Slit and the area along the periphery next to each The slot is replaced with a set of optical filters, which correspond to the length of the luaineaeierenden radiation to be scanned, whereby each filter the Abaesiungen a «

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Slits "and the order of the filters in a set is the same as for all other sets. If the inter" eoaating lurainescent components are diphenylanthracene and a terbiura-Kowplex "the slits can go through" in sehualband interference filters that have the wavelength old 5430 1 of the terbium can pass through, and a similarly shaped blue filter can be inserted in each disc at the same radial distance, but shifted by a small angle with respect to the green filter. The blue and green filters can be adjacent or somewhat separated from one another, but the arrangement must be the same at the location of each slot. Venn desired, a stationary slit in front of the photodetector can be arranged leg, when a particular filter at the front is in the slot, only the radiation that passes through this filter, the detector reaches "Bios reduces the proportion of the scattered radiation · Venn the Disc rotates, the signal from the detector has the same properties as mentioned above

In another embodiment, the slits described at the outset are retained, but the uninspiring radiation, after having passed through the slits, is directed to various photodetectors, each of which is equipped with a corresponding filter. With this arrangement

. ' W.

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reproduce the output signals from separate detectors luminescence radiation of different wavelengths and these outputs are sampled simultaneously and not one behind the other »as with the arrangement described above» Since the flash tube only intermittently with every second slot is ignited, alternating signals give a fixed decay time after the excitation, see B. 500 microseconds, again.

For each of the procedures described above, a clear distinction between the radiation emitted by photoluminescent substances wit very short time constants and originates from "substances with longer tent constants, possible even if the Luoinescence bands spectrally overlap"

The impulse method or the intermittent method can also be carried out with a fixed surface in front of the detector by moving the spectrum across this slit, for example with a rotating or oscillating mirror. and is brought here "

The impulse operation was described on the basis of the intermittent electrical operation of flash tubes, which a ueohan near time discrimination followed all of these

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However, drive modes can also be carried out electrically. If a priniaa or other devices which bring about a spectral dispersion of the luminescent rays are used in the figure 2, four, stationary slits can be provided which are spatially spaced from one another so that they let through the corresponding lainescence bands · Individual photodetectors are arranged behind each slit and the detectors are switched in such a way that it is possible to scan the individual detector outputs at embroidered time intervals during and following a lightblite. The flash tube is connected in a circle that drives it at a certain repetition speed, for example with a frequency of 60 Herta. If no spectral dispersion is used, the fluorescent radiation can be directed to a plurality of detectors equipped with suitable filters, whereby the timing of the detector outputs can be handled in the same manner.

Apart from its time dependency, the sign strength can can also be used to improve discrimination or differentiation of the iJytabole au. 3s it is assumed that there is a three-level component, In the

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at full intensity of ultraviolet illumination, the strengths of the fluorescent radiation at low and high concentrations of a specific component for reasonable Hauechabetand sufficient · Ks eoll Veiter be angenoiruaen from Darstellungagründen "that the difference between the Anei Signaletllrken 5% is 1» wherein the Ansprechsseit in essentially let the same "If uan compares now sine fluorassieiende radiation with a three eo SIZES radiation, then kaan ύίΦ arithmetic difference be ungenügeirid so that tanverLieid ^ are Störeignale occur either in öen el © ktroai3C5hen readings" of the other readings "AEIE an au ^ Contribute to sufficient areas, ao that the sub-division between the two levels "m ^ ureiohend wire!" It should now be assumed "that the intensity of the ultraviolet light is reduced by half either by changing the energy supply, the power of the lamp or the separation of the light path for both ultraviolet" and fluorescent light or the like. The difference si * ie before η Sen SWEi "ignalen then iet only half as groQ _f but the other eufülligen Kffekte or the sound does not nshimen from · The Hauechabetend can therefore to ssu a point to lose weight, in which the accuracy is no longer sufficient.

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Coded symbols can be in their spatial. Expansion vary. If the Üyiabole are in certain porraen, ζ · Β · in numbers, as is sometimes desired for bank checks and similar purposes, where the code is also to be read visually "this can lead to" a further variation in the strength of the fluorescent radiation and this fact may also reduce the differences between the high and the low level of the extent "that the accuracy is jeopardized" Venn now just case a reduction in the intensity of the ultraviolet light or the Fluoreezenz-Wirkuntfsgradea occurs, the results are even more affected. The measures according to the invention therefore aim to further reduce these disadvantageous influences. These inventive measures can be applied up to four levels «which of course greatly multiplies the number of coded symbols with a very small number of fluorescent components.

Instead of generating fluorescent radiation with different levels or the absence of output signals, a ratio between each output signal (similar to the ratios of the Auegiin / .e on lines B and C of the circuit according to FIG. 1) and a standard radiation is allowed, which is best «, Emanates from the ultraviolet light source itself,

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but has been greatly weakened. If B denotes the intensity of the exciting radiation after suitable attenuation and A denotes a factor which is proportional to the fluorescent light emitted by the excited component, then, if the component is absent or absent, the ratio a / E equals KuIl. However, when a small amount of component A is present, the ratio less than I ₁ may be sufficiently above zero to produce sufficient signal to noise ratio. ^m: now tenn the proportion of component A as large let, da3 the fluorescently about the same as E, the ratio cheating about 1 and finally, when the proportion of component A is substantially greater "is daa ratio greater than 1 · It is believed This means that these ratios differ from one another sufficiently so that there is a sufficient distance from the patient to ventilation, whichever ratio is present, this listening distance being only slightly more than necessary. Xun is to be reduced by half. Overall, the ratios do not change significantly, since if the exciting radiation is reduced by half, the fluorine-measuring radiation is changed in exactly the same ratio at different levels of a certain component. In other words, for practical purposes, change the proportions of the display of different symbols

BATH

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nioht, since both the numerator and the denominator are in the same Relationship to be prevented

The üyetetu according to the invention is essentially not carried out Fluctuations in the intensity of the exciting radiation, which are either caused by the change in the power supply or by the Changes to the fan operation itself or due to other optical factors are o The advantage of a large number of Level B, which has a large number of different * nen symbols with a small number of fluorescent coaponents will allow »is at the same time insensitive to changes in the exciting radiation or Differences in the documents achieved · "A company nit multiple levels with reliable and relatively invariable accuracy is therefore possible.

The measures according to the invention can be achieved without additional complicated facilities or without additional expense. Electronic circuits for displaying radiation detectors showing a relationship between reproduce two signals are known. Let me invention therefore not limited to any one circuit or any particular organization of the circuit elements, but any known coordination can be used

■■■ i: \ Lj OfiteiMAL

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are »which generate a ratio of signals from radiation detectors that receive two types of rays. For example, one! Signal can be applied to one end of a potentiometer and the other signal to the other and the potentiometer bo can be set so that it generates an output at its sliding contact that corresponds to the desired ratio. This quotient circuit is only a typical example (la individual training is described in US Pat. No. 3,179,320) and the invention is not limited to the use of this circuit _{or the like}

The advantages of the measure according to the invention, which enable operation with fluorescent components at several levels with sufficient accuracy, also lead to a further favorable result in some cases. Venn comparisons were made between the absolute levels of radiation or radiation levels, it was necessary to prevent to a very considerable MaO that the fluorescent radiation overlaps, as this overlap also a hat üngenauigkeit sequence has, which is perceived as increased noise. The example is intended to illustrate this fact. Mphenylanthracen fluoresces mostly in the blue "but its fluorescence band is quite wide and ee is still a small percentage of fluorescence in the countryside at the

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Imagine where the sharp fluorescence of terbium chelates appears, it is now necessary to have very large differences in the concentration of terbium chelate for different levels and βα may be necessary to keep the concentration of mphenylanthracene below a certain value · This can lead to the fact that diphenylanthracene cannot be used in practice except as a component in the purely binary structure, which only distinguishes between presence or absence, or that precise frequency control is required In cases, it is possible to work with a slight spectral overlap, which is practically out of the question if the ratio of the oil signal outputs, as it occurs in the inventive method, is not used _{or the like}

The invention is illustrated by the following example: This example illustrates a typical four component code using different amounts of each of these components. The blue component is 4,5-imidazole-2 and the other three components are chelates of terbium, europium and öasaarium. The query is made through the 3130% line of a mercury vapor lamp. The output of the detector for the Mercury therapy is strongly weakened to a relative one

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Intensity of 200 units, to produce »The following Table shows the readings relative to the mercury lamp, which tilt four different concentrations each Coding color component has been obtained. The photolumineesence of imidazoles (in the "blue" column) is somewhat stronger than the photolumineesence of the Lanthenidenohelate · Samarium has the weakest luminescence radiation of the three The display for the Hull-Vert corresponds to the little house

Tabel Tb Su S. concentration blue (Level) 14th 11 2 0 30th 110 100 80 L. 120 200 180 150 270 400 360 320 G 540

0 s are missing

L a about half the normal concentration B a normal concentration (target amount; + 30 jf)

0 β about twice the normal concentration

therefore, for example, the last two values for S lat can be seen wardsm, da2 for

009828/1388 * /

Values the display ratio in relation to a lower level » is about 2, the ratio getting better if the Concentration increases (e.g. 150: 80 is 1.9 and 320: 150 is 2.1) · The relationship of the absolute display ratios of the corresponding component with respect to the mercury vapor radiation also results in a separation by this factor of about 2 (80: 200 - 0.4; 150: 200 = 0.75; 320: 200 = 1.6 and therefore 0.75: 0.4 = 1.9i 1.6: 0.75 - 2.1) ♦

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Claims (1)

Claims 1 <> ■ method of reading information, in particular for reading symbols, the üfyrabole in predetermined phutclut-ainescent materials used in certain Concentrations are present or absent, are coded and with the symbols alt a short-wave radiation be illuminated and the I / urainescence radiation from each photoluiaineszierenden St off component sampled and is converted into an electrical signal, thereby characterized in that ratios between at least one of the fluorescent radiation of a component correspond Signal and another signal are generated, with daa other signal for a Higensehaft one other luminescent component or the source of illumination characteristic is " 2 · The method according to claim 1, characterized in that the symbol with a short-wave radiation source, whose Intensity is controlled periodically and time-dependently, is illuminated; daii uses luminescent substances whose reciprocal decay times are in the order of magnitude of the frequency of the exciting radiation a signal with a large DC component and 0 0 * 8 828/1386 to generate a small AC component; dafl Luminescent substances are used that are reciprocal Have decay times which are significantly greater than the excitation frequency Bind, uro an output signal »it a Wechseletrom component with a much smaller one Generate DC-dependent intensity; that the luninescence radiation of any luminescent substance or of each component is sampled and converted into an electrical signal, so that the signal is broken down into components by frequency-dependent devices that have at least one low-pass filter, whereby the luainescence radiation, which emanates from substances with relatively long time constants, becomes an equetrocon component at the output contributes and that further opposite The substances with the low frequency are discriminated against, uct a signal uit Vteohselstroiakooponenten to generate the luminescence of the substance with the corresponds to a short time constant; that a relatively smaller “alternating Troa signal” corresponds to the signal wave “the due to the luminescence of the components with a relatively long time Time constant is generated, is formed; and that this results in a ratio of alternating current to slolchstron will. 009828/1386 ~ 30 - 3. The method according spoke 2, characterized in that the technical current signals are rectified and displayed on common instruments 4. The method according to claim 2, characterized in that the the Syiabol old short-wave radiation is illuminated atoßweiee ι that the Iiuaineeaenzstrahl spectrally »Is imposed and that different spectral radiation areas are scanned in a lateral order and the time sequence is synchronized with the pulse frequency. 5 · The method according to claim 4, characterized in »that the spectral decomposition takes place statically and that the The different spectral radiation areas are scanned in chronological order 6 «Method according to claim 1», characterized in that In addition, an attenuated course-wave radiation is scanned and its intensity is converted into an electrical signal what is transformed is that conditions "at least wipe." a signal corresponding to the fluorine radiation of a component and the weakened short-wave radiation are absorbed, whereby the difference in the ratio 009828/1386 never between tt signals that correspond to the absence or the presence of at least two concentrations! mainly due to changes in the intensity of the short-wave radiation at which the symbol is illuminated, not be influenced 7. The method according to claim 2 or 6, characterized in that a chelate is at least one component bit of a relatively large time constant of the lutaineecency of a lanthanide ion is used β · A method according to claim 7, characterized in that at least the ohelatisierte lanthanide Xon Komponentcn in three untereohiedllchen Niveaae, nfialich missing, the presence in a Konsentration to erseugen inter alia Pluoresienis that su a ratio of less than 1 leads, in a concentration which leads to a fluorescence «which SU leads to a ratio of about 1» and is present in a concentration which leads to a fluorescence which leads to a ratio of far greater than 1. 9 · Device for indicating the presence of a photoluminescent substance and for differentiating between smears Substances with different properties, labeled p_O ·: "K-IN AL 009828/1386 by ίί-rvun iätiitixbh varied iitrahlungisirenerator (7) aer / aui ^ OEEA-fitötp-lUfatttessileTGirtlen substance radiate "wherein the _iittahlURf: £ ine Viecshseikimponen-th .hat, duvei: abti'tS'vi'ri.io i-en & iiüriehtun that the ußittlt'rte iVlrah t.-.:i ρ i.iiU ^ ti η, and-fine eleklri see t »i.ßfialauaß.ai * fc,. at <like ti in «- ^; . ^4! ? Xtox'BGhaltuiv ¹ , nil. different prequens channels, atu between radiations Liitve: rachi ed enea outttuivttin au 10c device according to Anaprucli 9, gekennüeichnot duroVi ein Pair of filters, one of which is a high-pass filter and öns amlere a low-pass filter iat. Vt, device according to claim. 9s <laduro'ii.'neiiennz-eichnet that der Ktraiilunf3 £ e norator a-xrapuläförmlge ^ lcuTawelliße t. aimed at the symbol, ääj3 dlsperaion " (9) provide for the Biotoluaiineezzetstrahlung, which of the Üyiabol auagelit, emi-catch, that an ultra-radiation detector (12) and a disc (10) with f> ohlitzea (V1.) it is provided that the washer (10) Eynohron driven with the pulse frequency of the ijtrahluaeßquelle and that the disc and the slots ao are angeoronet that Bie the apectrally relocated rays (R, 0, G and B) between the distribution facilities (9) and read through the radiation detector (12). . "". ■ '"' - ■ BAD- ^: ORJG1NAL 0 0 9828/1386