DE1449880C3 - Arrangement for the xerographic implementation of information - Google Patents

Description

20th

The present invention relates to an arrangement for the xerographic conversion of information, which as a multi-component, coherent, electromagnetic radiation field, preferably from high intensity, in the optical spectral range including the ultraviolet and infrared border areas exist, this radiation field in a simultaneous optical system consisting of a, several anisotropic, partly birefringent, laser-active crystal subregions containing crystal systems is generated and / or amplified.

It has already been proposed that such a radiation field forming an information manifold to generate and / or amplify in an optical system, which consists of a crystal system with several anisotropic, partly birefringent, laser-active partial crystal areas and which are optically coupled by the multi-component, coherent radiation field.

For the xerographic implementation of such a variety of information The present invention makes the properties of ferroelectrics, such as Seignette salt, lithium niobium trioxide (LiNbCb) or potassium niobium trioxide (KNbCb) and photo electrets, such as sulfur (S), cadmium sulfide (CdS) or zinc sulfide (ZnS).

Forms under the influence of laser radiation and the simultaneous presence of an electric field Inside a photo-electret there is a space charge distribution with a dipole character, which is also maintained when the light radiation and the electric field are made to disappear. So it is an electrical analogue of a magnet. By further exposure to Light or other types of radiation, such as B. sound radiation, this space charge distribution can again can be made to disappear, namely the charges are balanced by photocurrents.

It is known that ferroelectrics exhibit polarizability with hysteresis behavior under the influence of an electric field.

According to the present invention, there is therefore an arrangement for the xerographic conversion of information at least one part of the crystal through a ferroelectric, such as, for example, Seignette salt, lithium niobium trioxide (LiNbCb) or potassium niobium trioxide (KNbCb) and / or a photoelectret, such as Sulfur (S), cadmium sulfide (CdS) or zinc sulfide (ZnS) are shown and an optical and / or photoelectric Feedback between the laser-active areas of the crystal and those represented by the electrets Crystal subregions provided.

Further details of the invention emerge from the following illustration and the explanations to the embodiments shown in the figures.

The photoelectric interaction of the multi-component, coherent laser radiation field is higher Intensity is both in terms of the structure of this radiation field in terms of the polarization of the photo-electret the quantitative size of the dipole moment, as well as in relation to the spatial distribution of the underlying lying space charge distribution are expressed.

The duration of exposure of the photo-electret is also a parameter of the structure formation of the Polarization distribution after the end of the exposure to the laser radiation and after removal of the am Photo-electret lying voltage. Because the polarization achieved in each case generally lasts for a very long time is fixed unchanged in the crystal, the forced space charge distribution in the photo-electret can be seen as a Find an electrical image of the structure of the laser radiation field.

For this reason, according to what has been set out so far, the polarization structure achieved in the crystal is a memory the information population contained in the laser radiation field. As a result of the high intensity of the Laser radiation occurs noticeably after one or more laser radiation pulses have only a short duration Polarization effects in the photo-electret, so that a control of the photo-electret up to the saturation range is not required.

The build-up of polarization in the photo-electret takes place under the influence of the laser radiation field with simultaneous application of an external electrical voltage to the photo-electret. These can be switched on and off Voltage is supplied via electrodes that are transparent to the respective radiation can be used at the same time as delimitations of the laser-active crystal subregions. This guarantees that the coherent, multicomponent radiation field or subcomponents of it Enforce crystal sub-area; this is important because the polarization effect is not a surface effect, but is a volume effect.

It is advantageous to have the partial crystal area represented by the photo-electret in a spatial union area to arrange different optical paths of the multi-component, coherent radiation field. · ·

The information content contained in the multi-component, coherent laser radiation field is used in the photo-electret brought to interference, the interference structure precipitating as a polarization structure represents the optical information content. This can in the course of the photo-electret stored and transferred to other optical and / or electrical systems at will. the Information content of the multi-component laser radiation field stored in this way in the photo-electret offers the possibility of storing and transmitting a very large amount of information. The interference figure that is reflected in the photoelectret is a well-known example for understanding to be used with a punch card system

comparable to an information store in some ways.

The multi-component laser radiation field can be branched with regard to its optical paths, parts of the optical path lengths being temporal and spatial can be varied by control influences, which are in a union area of these optical Make paths in the interference structure noticeable. This interference structure generally represents one The information content with which the branched radiation field has been applied. If the Photo electret is arranged in the spatial area of the interference structure, the resulting The polarization structure in the photo-electret is a corresponding mapping of the optical information entirety represent.

Since the photo electret can be designed as a thin layer of the order of magnitude below 100 μ, becomes a supporting substrate for the photo-electret that is permeable to the frequencies used its electrodes used; this substrate can e.g. B. made of quartz or glass.

A grid-shaped film can be applied to the electret. However, the electret itself can also consist of a system of grid-like, independent cells. To this In this way it is possible to determine the structure of the information content, which is reflected in electrets, to analyze or resolve in a system of many individual cells, so that also a certain The microstructure of the information content can be evaluated in terms of message technology. In the latter case - in the case of cells that exist independently of one another - each individual cell is connected to its own circuit, and the radiation-transmissive cell electrodes are independent of each other. In the first In the case, the electret remains homogeneous and is only subjected to a cell structure by the applied grid. It can be seen that the formation of the electret in a cell structure results in a technically detailed one Fixation of the composite laser field of a certain structure.

In addition to the spatial, temporal structure resolution of the laser field is provided. To this end the electret can be arranged on a movable strip in such a way that in each case certain subregions of the strip can be influenced by the coherent radiation field in a xerographically variable manner over time. About it In addition, the electret or the cell-shaped electret system can be arranged on a roller for this purpose being.

To query the electret stored as a space charge distribution with electrical dipole moments Information totality means are provided, which both through a on a certain reference potential brought probe, as well as formed by the electrodes attached to the electret itself can be. Furthermore, the interrogation can be carried out by an electron beam deflected in the dipole field of the electret be made.

The permeable electrodes of the electret can be switched on in a circuit, which one registering arrangement for measuring the charge current generated during the interrogation. Farther a radiation source is provided whose radiation is used to query the information content the .Electreten prevailed, as a result the to be registered Discharge currents flow.

Regarding the external circuit of the electret, the electret cell, or the electret system, there are three Differentiate phases:

During the irradiation with the laser field, the electrodes of the electret or the electret cell are applied an external voltage is applied, under the influence of which, during exposure, a photocurrent according to the value of the developing Space charge distribution flows. In the information storage phase, after each termination The external voltage is switched off under the effect of the laser field, but the circuit is closed held. During the quenching phase, on the other hand, the electret is exposed to a quenching radiation field, the circuit is now open.

The electret is known per se for the electrophotographic recording of the information content Way covered with a powder consisting of negative and positive particles, being on top of the powder a electrophotographic paper is brought, which with an electrode for applying a high electrical Field, in particular of several kilovolts / cm. The electrophotographic paper can Be strip-shaped and movable on a roller for later evaluation of the electrophotographic Image are preserved.

For optical feedback, that is shown by the photoelectret. Crystal sub-area as a limit designed for further laser-active crystal subregions of the overall arrangement. That way becomes a allows optical variable delimitation of laser-active crystal subregions, with the optical properties of the limiting electret are first modified by the laser radiation field, on the other hand however the resulting modification of the optical properties of the electret through change the boundary conditions have a retroactive effect on the effect of the laser activity in a laser-active part of the crystal. This allows the laser effect to pass through both in terms of its threshold and in terms of intensity variable boundary conditions by themselves in the sense of a feedback in certain time intervals of the Work plan of the individual laser-active sub-areas can be controlled.

In this case, the electret is linked to a semitransparent, partially reflective layer forms with this an optical unit as an optical boundary condition for the laser-active crystal sub-area. Thus, the conventional delimitation of a laser-active, resonance-capable partial crystal region, for example a Perot-Fabry arrangement extended by a photo-electret, so that controllable optical Boundary conditions for the resonator arise, both through the laser beam itself and through external additional optical or electrical influences can be controlled.

Another type of feedback on the laser activity of laser-active, resonance-capable partial crystal areas consists in the fact that the photocurrent of the photo-electret at least in certain time segments on the electrical Switching elements of the laser-active crystal subareas by conventional means, e.g. B. capacitive or inductive type, is fed back, so that hereby an optical feedback via the electrical switching paths the overall arrangement takes place.

The information content can at least partially through a crystal sub-area, which is called Ferro-Elektrikum is designed to be stored. This is based on the physical properties of ferroelectrics

Made use, analogous to an electromagnet in an external electric field reversible electric To train dipole moments according to a hysteresis behavior. These dipole moments are called constituents the information content of the laser radiation field is used, whereby the photo-electret as optical Intermediate between the laser field and the polarization effect in the ferroelectric is used. Here the ferroelectric can have a cell structure, so that each cell of the photo-electret with a corresponding Cell of the ferroelectric is linked by circuitry. The ferroelectric crystal sub-area is arranged in the area of action of an electric field that enters and exits through the photo-electret is switched off and polarity can be reversed with regard to its direction.

The invention is explained in more detail below with reference to exemplary embodiments of a schematic character.

The embodiment according to FIG. 1 shows one of several laser-active, resonance-capable crystal subregions existing crystal system 1, in which a multi-component, coherent radiation field is generated and is selectively amplified, the laser radiation alternating in the individual laser-active sub-areas induced simultaneously, so that finally one that collects all laser-active crystal subregions together stimulated emission arises. For the radiation field, only the axis of the beam path is shown in dashed lines.

The individual crystal subregions - in the present case there are three, each with a cellular structure the resonators - are only shown schematically. Through a prism-shaped medium 2 shows the individual partial beam paths in the crystal system 1 to form a simultaneously coupled total radiation field mutual stimulation united. In this total radiation field, the Laser arrangement 3 as an information transmitter selectively irradiated various signals. The laser assembly 3 basically consists of an arrangement of several or many laser-active parts 11, 12, which are against each other can be exchanged, so that in each case at least one of them in the already existing total radiation field of the crystal system 1 can be coupled. The laser-active sub-elements are on a rotating disk, as in the present case, or other movable mechanisms attached.

The multi-component, coherent radiation field in which, as mentioned, at least some components can be selectively amplified, is radiated into an interferometer arrangement 5. In the present Case, for example, an optical plate is chosen as the interferometer arrangement in which the radiation, as indicated in the figure, is reflected multiple times, while at the same time optical bundles are more parallel Rays emerge with different optical path lengths, which through a converging lens 6 for interference to be brought. The resulting interference figure has a structure that corresponds to the information content of the simultaneously coupled radiation field. Any frequency in the interferometer array 5 can exit at a certain angle, so that two different frequencies also become two different Interference arrays. Give cause.

The spatial area in which these interference structures arise is created by a photoelectret 7 completed. In this way it is possible to display the information content of the coupled laser field in to fix a crystal body designed as a photoelectret. The universe of information manifests as a result, appears in the photoelectret as an electrophotographic latent image. This is represented in the Photoelectret by a certain space charge structure, which by freely selectable external conditions now available as an information memory for any length of time and electrically by appropriate means or can be queried visually and finally deleted by further means at will can.

In its simplest configuration, the photo electret 7 is permeable to the frequencies used Electrodes 8 and 9 are provided. Through the electrodes, the electret 7 can under the influence of a strong Electric field are brought, which when irradiated by the interference laser field causes the formation of the space charge distribution. Visible at the spatial points with optical Brightening an area of strong electrical polarization occurs while in spatial locations interference-related darkening, the formation of electrophotographic polarization does not occur.

Since the photoelectret 7 can also be designed as a thin layer, it is radiolucent with its Electrodes 8 and 9 applied to a substrate 10, which is mainly used as a support for adjustment serves. In particular, a radiation-permeable medium is to be selected as the substrate, which z. B. during the deletion process of the information content of the photoelectret can be acted upon by additional radiation target. In addition, the transparency of this substrate is insufficient for the production of xerographic recordings required for the latent image.

In connection with the fixation of the information contained in the laser radiation field in the photoelectret As a latent electrophotographic image, three different electrical switching states of the Photoelectrets 7 technically realized.

In the first switching state, the electrophotographic image is generated in the photoelectret 7. Here the Photoelectret both with the interference figure of the laser radiation field and with the additional one applied electric field between the electrodes 8 and 9. It is therefore necessary that the two Radiation-permeable electrodes are connected to an external voltage source, not shown. During this switching state, the laser radiation field can either be continuous or during certain act on the photoelectret 7 for shorter periods of time. Basically, however, it must be used for the action the interference figure of the laser radiation field is the electric field between the electrodes 8 and 9 must be turned on to create the electrophotographic latent image. The time it takes to form this the required state of the space charge structure can be chosen to be much shorter than it is for Formation of a saturation polarization would be required since the polarization process is instantaneous begins as soon as the electret is exposed to the electric field and the optical radiation field at the same time is and on the other hand relative due to the high intensity of the interfering laser radiation field small exposure times are sufficient.

After the end of this period of impressing the information content in the photoelectret 7

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there is another time period in which this information content can be saved as long as you like. A new switching status of the photoelectret is required for this required, in which now the irradiation of the laser radiation field ceases and also there is no longer any external electrical potential at electrodes 8 and 9. Rather, in this switching state the external circuit between the electrodes shorted. That way, the saved one remains electrophotographic image obtained in the photoelectret. Physically, this is based on the fact that when the electrodes 8 and 9 are short-circuited, the inner electric field in the photoelectret 7 becomes very small, with the polarized space charge distribution inside is largely neutralized by charge carriers on the outer electrodes, which are caused by short-circuiting of the electrodes occur due to influence. In this state, the information content is fixed in place Space charge distribution stored.

Another switching state is the function of transferring the stored information content characterized to other external systems, not shown. This transfer can be done in several ways happen. Initially, no electrical transmission is possible. For this purpose the photoelectret is used brought with its electrodes into the inner field of a capacitor system, which consists of numerous grid-shaped arranged probes. The electrical transmission to this live system now takes place in that suddenly the short-circuited circuit between the electrodes 8 and 9 opens will. This creates a pulse in the interrogating capacitor system between each pair of probes, the amount of charge depends on the polarization at this point on the photoelectret was fixed. In this process it should be emphasized that although the structure of the electrophotographic Image necessary condition is the duration of the electrical transmission to such However, a grid-shaped system turns out to be orders of magnitude shorter than the relaxation time of a perfect one Charge equalization in the photoelectret would claim.

This physical circumstance is important for the technical measure of this specific function. This is because the transfer of the information stored as a latent image can be seen the grid-shaped probe system in the eye of the opening the short-circuited switching state due to the release of the influenced charge on the surface of the photoelectret causes which in the switching state of the information storage there according to the size the polarization present in the volume of the photoelectret can be recorded. The one on the grid-shaped Charge transferred to the probe system can be electronically transferred to other electrical charges in a conventional manner Systems are transferred and used there as an electrical representation of the information content will.

The fourth switching state of the photoelectret is the phase in which the information-carrying polarization structures are erased intended. In this switching state, the outer circle of the electrodes is generally open to keep. The scanning grid-shaped probe system has been removed or removed from the photoelectret. the photoelectret is removed from the probe system. When the circuit is open, the photoelectret is now exposed to electromagnetic radiation or sound radiation. The electromagnetic Erasing radiation can itself be laser radiation, which either comes from external radiation sources or from laser-active crystal areas of the overall crystal system is branched off. This fact is in the schematic representation for reasons not shown for simplicity. The photoelectret is temporary for quenching with sound radiation to be brought into connection with a sound-emitting medium in this switching state. In simple In some cases, this medium can be a quartz oscillator, which is electrically excited to vibrate as Ultrasonic waves are transmitted to the photoelectret. In special cases, in the switching state of the erasure, an external voltage can also be applied to the photoelectret for certain periods of time, which, however, creates an electric field in it, which is opposite in direction to the outside Field in the switching state of the information specification.

To increase the speed of the deletion process, the laser radiation provided for the deletion can be used and the ultrasonic radiation act simultaneously on the photoelectret.

The photoelectret can also have a complicated structure. Here is an example of a structure of the photoelectret provided in a layered arrangement, the individual layers also through Interlayers to be chosen as ferroelectrics are separated. However, further training should be preferred of the photoelectret, which has a grid-like structure, so that now the impressed information content is transferred to numerous cells of the photoelectret of equal value is distributed. The individual cells can only subdivide the same crystal be, but there are in particular also those configurations of the photoelectret in which the individual cells, although they are spatially close to one another in the form of a grid, from one another in electrical terms work independently. As a result, every such grid cell of the photoelectret system now has their own circuit, which is subjected to the switching conditions explained above. In each case at least one electrode of a cell is consequently electrically independent of all the others and electrically in relation to them isolated or separated from this, while the other electrode is assigned jointly in special cases can be. In this way, all cells are connected to a common reference potential. This condition is technically important for the further transmission of the information content of the individual Cells to other electronic switching systems. In special designs, however, each pair of electrodes can also be used of the cells of the photoelectret are switched independently of one another.

These switching measures are of fundamental importance for the implementation of information storage and information processing of complex information content, which is due to the multi-component, coherent laser radiation field of the crystal system is formed. To the nature of this information storage To make it understandable, is intended as a simple analogue of information storage Punch card systems are remembered. The selectively amplified total information created in the laser radiation field is transferred to a system of photo-electrets, which is carried out in the manner described above is constructed. Obviously this corresponds to this system

a grid-shaped photoelectric secret system an optical Punch card system, although the information content and its nuances in the present Case is orders of magnitude superior. There is more than just a yes-no statement in a single cell possible, but the quantitative degree of polarization can be any arbitrary in certain value ranges Assume a value, so that the intensity of the polarization or the stored amount of charge a Represents quantity of information within each cell. This type of information content is more likely with to a color scale or to an acoustic sound.

The grid-shaped photoelectret system can also be expanded by a layered structure. Even in these more complicated cases, radiation-permeable substances are used as support.

Finally, it should be mentioned that the systems just described are based on photoelectrets themselves transportable or movable mechanisms can be arranged, for. B. on long ribbons Rollers or moving spheres. In this way it is ensured that in the programmatically provided Time sequences which are adapted to the emission times of the laser radiation field, alternately different Photoelectret systems come into use, z. B. during switching times certain photoelectric cells, which are used for information imprinting or storage, other photoelectric cells for the switching status be fed to the extinction, or certain photoelectric cells can be in other electrical or optical systems are used for further processing of their information content. In this regard is z. B. the electrophotographic or xerographic evaluation of the latent information content by electrophotographic transfer to photoelectric paper.

The F i g. FIG. 2 shows a schematic illustration of an exemplary embodiment in which the photoelectret from FIGS Cells 13 through 26. These cells are provided on one side with the common electrode 41, while on the other hand each has its own electrode 27 to 40. The system is similar to in Fig. 1 applied to a supporting transparent substrate 10. Not for the sake of clarity illustrated electrical leads for the individual electrodes 27 to 40 are in the plane between the electrophotographic cells and the transparent substrate 10 led out along raster lines, so that there is practically no impairment of the radiation field by the electrical leads.

The F i g. 3 shows a further embodiment in which a movable system from FIG Photoelectret cells 42 to 66 is shown in cross section. In this embodiment, each is with a own pair of electrodes 67 to 92 provided. The capacitive probes 93 to 97 serve, as already explained, the electrical decrease of the information content stored in the electrical cells.

In Fig. 4 another exemplary embodiment is shown schematically in the beam path of a mirror arrangement 129, 130, 131, 132, where 131 is a semitransparent mirror, there is a laser-active crystal system consisting of several crystal areas, which, as the beam path indicates, emits a multi-component radiation field into the crystals 134, 135, 126 . The crystal 126 is a photoelectret in which the branched coherent radiation from the partial crystal region 133 generates an interference structure, as a result of which a corresponding polarization occurs, which is stored as the information content of the multi-component laser radiation field. 127 and 128 are electrodes for the above-explained field application to the photoelectret. The laser-active crystal sub-region 133 can in turn consist of a plurality of laser-active, resonance-capable crystal sub-systems which are in mutual optical interaction and generate a simultaneous, multi-component laser radiation field. Certain crystal subsystems can also be designed as laser diodes. The individual crystal sub-systems are matched to one another in their spectral range, but overall a greater spectral width is covered than would be the case with a single crystal sub-area. For example, if several laser diodes are used as partial crystal areas, the width of the forbidden band can differ from one another due to the material composition or due to external mechanical forces. Corresponding ratios can also be used for other laser-active crystal subsystems. In FIG. 4, the individual crystal subregions of the crystal subsystem 133 and the semitransparent mirrors that generate their resonance are not identified. The crystal subregions 134 and 135 can serve as a means for defining certain optical path lengths which are intended to be modified by external influences on the crystals. For this purpose, the crystals can, for example, have piezoelectric properties, and they can also be anisotropic and birefringent. The refractive index is modified with an electrical control and thus additional low-frequency information is stored by modulating the optical path. Furthermore, at least one of the crystals 134 and 135 can itself be a laser-active system which, together with the partial crystal region 133, generates a multi-component laser radiation field of simultaneous oscillation.

In the present exemplary embodiment, in contrast to FIGS. 1 to 3 parallel to irradiated through the electrodes, while in FIG. 1 to 3 perpendicular to the electrodes on the photoelectret was blasted. The interference structure generated in the photoelectrete is periodic due to the corresponding period Hatching indicated. In areas with a radiation brightening there is also a corresponding one here Polarization takes place against the much lower polarization in the area with compensated radiation intensity contrasts. The complex information content can · in a correspondingly complicated interference figure Find precipitation. In another embodiment of this arrangement, however, the photoelectret can also be used here be introduced into the beam path in such a way that the two electrodes of the photoelectret are perpendicular be penetrated by the radiation. The switching conditions discussed above also apply here. as well the photoelectret can also have a cellular structure.

Another embodiment is shown in FIG. 5 shown schematically.

The laser diode 136 emits a multi-component, coherent radiation field onto a photoelectret 137, the radiation field of the laser diode also branching out via the mirrors 124, 125, 139, 140 and the prism-shaped mirror 141.

In this way, the branched radiation field in the photoelectret 137 is brought to interference, as can be seen from the beam path. As already explained above, a polarization structure corresponding to the interference structure arises in the photoelectret, which represents the information content. As shown in FIG. As can be seen, the laser beam emitted directly from the diode is also transmitted through this polarization structure of the photoelectret, whereby the laser beam is modified as a result of the control in the crystal regions of different polarization structure. The information content of the interference field coming into being is also modified predominantly at low frequencies by the generally crystalline medium 142. The medium 142 has the property of electrically or mechanically varying its refractive index in a certain way as a result of external influences. In a somewhat modified embodiment, this medium can also be birefringent, it being possible in particular to control the direction of polarization of the branching of the beam path that occurs in this way. In a similar way to FIG. 5, both the ordinary as well as the secondary beam can be brought to interference, but now the polarization properties of the two beams contribute to the information content! wearing. The beam scattered at the interference structure in crystal 137 hits a second photoelectret 138 in which the final information is then recorded in the manner described above. The optical process in the crystal 137 corresponds on the one hand to an optical feedback of the laser radiation field to itself and on the other hand to an optically controlled gate for the output of the laser radiation field in accordance with the information content. Both the photoelectret 137 and 138 can have the complicated structure of numerous photoelectret cells described above. In addition, both can be movably arranged in the manner described, so that new photoelectric crystal regions are used with the passage of time. The switching states that have been described above apply to both photoelectrets or photoelectret systems.

In the embodiment according to FIG. 6, a multi-component radiation field of the mutually stimulating laser diodes 144 and 145 is brought to interference via the mirror system with mirrors 146, 147, 148, 149 and 150 in the photoelectret 143 , with two main radiation directions of the common coherent radiation field penetrating each other perpendicularly. This creates a three-dimensional interference structure as an expression of the information content in the spatial areas of the photoelectret 143 in which the two interference structures are superimposed. The further use of the information content takes place according to the options explained above. In order to impress the polarization structure in the photoelectret 143 , the latter is provided with two pairs of radiation-permeable electrodes. The transparent pair of electrodes 151 and 152 is shown in the figure, while the second pair of electrodes is not shown, which delimits the electret from above and below parallel to the plane of the drawing.

In Fig. 7 is the one in FIG. 6 used photoelectret 143 with its two transparent electrode pairs 151 and 152 as well as 153 and 154 shown in perspective in a self-explanatory manner.

For this purpose 3 sheets of drawings

Claims (1)

Patent claims: 1. Arrangement for the xerographic implementation of information, which as a multi-component, coherent, electromagnetic radiation field, preferably of high intensity, in the optical spectral region including the ultraviolet and infrared border areas are present, this radiation field in a simultaneous optical system, consisting of one, several anisotropic parts birefringent crystal system containing laser-active partial crystal regions, generated and / or reinforced is characterized in that at least one part of the crystal is replaced by a ferroelectric, such as Seignette salt, lithium niobium trioxide (LiNbCb) or potassium niobium trioxide (KNbCb) and / or a photoelectret (7), such as sulfur (S), cadmium sulfide (CdS) or zinc sulfide (ZnS) is shown and that an optical and / or photoelectric feedback between the laser-active partial crystal areas and the partial crystal areas represented by the electret consists. 2. Arrangement according to claim 1, characterized in that a photo-electret (7) Part of the crystal shown as an information store for the multicomponent, coherent Radiation field formed information population is used. 3. Arrangement according to claim 1 or 2, characterized in that the by a photoelectret (7) the partial crystal area shown with electrodes (8, 9) is provided so that the multi-component, coherent radiation field or sub-components of the The radiation field enforce this crystal sub-area. 4. Arrangement according to one of claims 1 to 3, characterized in that the by a photoelectret (7) shown crystal subarea in a spatial union area of different optical path of the multi-component, coherent radiation field is arranged. 5. Arrangement according to one of claims 1 to 4, characterized in that the electret (7) with its permeable electrodes (8, 9) on a substrate that is permeable for the frequencies used (tO) is applied. 6. Arrangement according to one of claims 1 to 5, characterized in that the substrate (10) Quartz or glass is used. 7. Arrangement according to one of claims 1 to 6, characterized in that on the electret (7) a grid-shaped film is applied. 8. Arrangement according to one of claims 1 to 7, characterized in that the by an electret (7) shown crystal subarea from a system of grid-like arranged from each other independent electret cells. 9. Arrangement according to one of claims 1 to 8, characterized in that the electret (7) or the electret system is arranged on a rotatable disc, in such a way that in each case certain sub-areas of the disc is influenced by the coherent radiation field in a xerographically variable manner over time will. 10. Arrangement according to one of claims 1 to 9, characterized in that the electret (7) or the electret system on a movable strip is arranged in such a way that in each case certain subregions of the strip from the coherent radiation field xerographically influenced in a temporally changeable manner. 11. Arrangement according to one of claims 1 to 10, characterized in that the electret (7) or the electret system is arranged on a roller is. 12. Arrangement according to one of claims 1 to 11, characterized in that a specific Reference potential brought probe is provided in the electret (7) as a space charge distribution to query the information population stored with an electric dipole moment. 13. Arrangement according to one of claims 1 to 12, characterized in that the permeable electrodes attached to the electret (7) (8, 9) are provided in the electret (7) as a space charge distribution with an electrical dipole moment query stored information. 14. Arrangement according to one of claims 1 to 13, characterized in that an electron beam deflected in the dipole field of the electret (7) is provided in the electret (7) as a space charge distribution with an electrical dipole moment query stored information. 15. Arrangement according to one of claims 1 to 14, characterized in that the permeable electrodes (8, 9) of the electret (7) in a circuit are switched on, which is a registering arrangement for measuring the resulting from the query Contains charge current. 16. Arrangement according to one of claims 1 to 15, characterized in that a radiation source is provided, whose for querying the information content Serving radiation penetrates the electret (7), as a result of which the to be registered Discharge currents occur. 17. Arrangement according to one of claims 1 to 16, characterized in that the electret (7) or the electret system in a manner known per se is covered with a powder consisting of negative and positive particles. 18. Arrangement according to one of claims 1 to 17, characterized in that an electrophotographic is applied to the powder in a manner known per se Paper is brought, which with an electrode for applying a high electric field, ins- • especially of several kilovolts / cm. 19. Arrangement according to one of claims 1 to 18, characterized in that the photo electret (7) formed crystal subareas for optical feedback as laser-active crystal subareas (1) limiting layer is formed. 20. Arrangement according to one of claims 1 to 19, characterized in that the photocurrent which can be taken from the electret for electrical control or feedback of the laser-active crystal subregions (1) is used. 21. Arrangement according to one of claims 1 to 20, characterized in that in addition to the partial crystal area formed by the photoelectret (7) Use at least one part of the crystal from a ferroelectric as information storage finds application. 22. Arrangement according to one of claims 1 to 21, characterized in that the ferroelectric crystal sub-area in the effective area of a Electric field is arranged, which can be switched on and off by the photoelectret (7) and with regard to its direction can be reversed. 23. Arrangement according to one of claims 1 to 22, characterized in that the ferroelectric crystal sub-area has a cellular structure, Each ferroelectric cell corresponds to a cell of the photoelectret (7) according to the circuit. 24. Arrangement according to one of claims 1 to 23, characterized in that another one to delete the stored information content Radiation source is provided.