Optical component, image pickup device and method for producing an optical component

Abstract

The invention relates to an optical component comprising two connected fiber optic plates, as well as a manufacturing method therefor and an image recording device with such an optical component.

Description

Technical FieldThe invention relates to optical components with fiber optic plates. Such devices can be used for residual light amplifiers, night vision devices and imaging systems in high radiation exposure environments. Examples are X-ray detectors, gamma ray detectors, electron beam detectors, UV and EUV detectors. The imaging systems can be indirect radiation detectors in which the radiation to be detected is converted into a light radiation and the latter is fed to an image sensor by means of fiber-optic plates. The imaging systems can also be used for spectrometers.Prior ArtFiber optic plates for indirect x-ray imaging are known, inter alia, from the publication https: / / www.princeton instruments.com / learn / x-ray imaging / utilizing-fibers-forindrect-detection-of-x-rays, called 12.08.2024.From this publication, fibre optic plates with various types of extramural scattered light absorption device (engl. Extramural Absorbers - EMA). Instead of "extramural", the translated term "off-home" may also be used. In this case, depending on the EMA type, various absorbing materials are introduced into the fiber-optic plate in order to absorb scattered light in the fiber-optic plate before it can reach the light exit surface. In the interstitial type, interstitial black fibers of small diameter are arranged between the optical fibre positions, as is known for example from WO02 / 039155 A 3 and EP0927705 A2. In random EMA, light absorbing fibers having the same diameter as the optical fibers are inserted in manufacturing the fiber optic plate. In the annular EMA type, the light-conducting individual fibers are surrounded by a thin black cladding, as described, for example, in US7221835 B1.From CN118005280 A it is known to produce a lead-free radiation-resistant glass material which contains oxides of lanthanum, ytterbium, barium, strontium, niobium, zirconium and cerium. CN117585899 A discloses a radiation-resistant glass material with gamma ray shielding action and neutron protection function, which contains oxides of lead, gadolinium and cerium. CN1156113 A discloses a radiation-resistant glass material which contains oxides of boron, cadmiun, gadolinium, barium, tin or zirconium. CN110698062 A discloses a radiation-resistant glass material which contains cerium oxide. DE102009027109 A1 discloses a lead-containing outer space glass which contains dopings with oxides of lead, cerium, molybdenum, bismuth, tungsten, silver, tin or arsenic. EP0779252 A1 discloses a radiation-resistant glass which contains dopings with oxides of barium, boron or cerium. DE3102639 A1 discloses a radiation-resistant glass fiber which contains cerium(III) or cerium(IV) ions as dopants, whereby color centers are suppressed. The doping is achieved by adding cerium oxide to the glass material. US2830000 A discloses a radiation-resistant glass material which contains oxides of lead and boron.WO2021 / 065284 A1 discloses a fiber optic plate, a scintillator plate and a radiation detector, and also a method for blocking X-rays or electron beams. A glass material is used which is doped with oxides of gadolinium, lanthanum, zirconium, niobium, bismuth or tantalum. To block X-ray or electron radiation, an attenuation element is positioned in front of the scintillator. This has the disadvantage that the image quality is impaired. In addition, only radiation which is not to be detected can be blocked. The radiation to be detected cannot be blocked, since it must reach the scintillator. Then, however, it can also lead to radiation-induced discoloration of the fiber-optic plate.EP 1218919 B1 discloses an imaging radiation detector with a fiber-optic plate which comprises an extramural scattered light absorption device.US 7285786 B2 discloses a scintillator plate in which the scintillator material has a cellular structure. Such a scintillator is difficult to manufacture.US 2006 / 0 124 858 A1 discloses an optical component with two fiber-optic plates, between which a gel layer for optical connection is arranged.U.S. Pat. No. 3,560,792 A discloses an optical component having two fiber-optic plates, between which an immersion oil layer is arranged.Object of the InventionIt is an object of the invention to provide an improved optical component and a method for manufacturing the same.Solution of the ProblemThe object is achieved by an optical component according to claim 1 and a production method according to claim 12.Advantages of the InventionThe connection according to the invention of the fiber-optic front plate to the fiber-optic rear plate is temperature-stable and vacuum-suitable. This allows the light entry surface to be coated with a fluorescent or scintillator layer at high temperature in a vacuum if both plates are already connected. The two joined fiber optic plates are more suitable for radiation detectors than single piece plates because the radiation-proof function of the front plate can be provided independent of the mere photoconductive function of the back plate. As a result, the radiation-proof front plate made of expensive material can be made thin. At the same time, the optical function is improved because the radiation-resistant equipment can impair the light-guiding properties. In addition, the embodiment of the invention of joining two fiber optic plates by diffusion welding an index gel or optical adhesive joint is superior in strength, temperature stability and minimizes light loss and stray light.DESCRIPTION OF THE INVENTIONAn optical arrangement according to the invention together with the method according to the invention is described below.The optical component according to the invention comprises a fiber-optic front plate having a light entry surface and a front plate connecting surface opposite the light entry surface. The optical component also includes a fiber optic backplate having a backplate connection surface and a light exit surface opposite the backplate connection surface. According to the invention, the fiber optic front plate is fixedly connected to the fiber optic rear plate by means of a diffusion welded connection of the front plate connecting surface to the rear plate connecting surface. The light entry surface can lie in an xy plane. The front plate connection surface and the rear plate connection surface may be located in another xy plane. The light exit surface can lie in a further xy plane.The directions x and y together with a direction z can form a Cartesian coordinate system. The distance of the light entry surface from the front plate connection surface can be defined as the front plate thickness. The front plate thickness can advantageously be 1 mm to 30 mm, particularly advantageously 2 mm to 15 mm and very particularly advantageous. The distance of the backplate connecting surface to the light exit surface can be defined as backplate thickness.A fiber optic plate (FOP) may comprise a plurality of optical fibers, which may be formed as optical fibers. The FOP can be covered with fibers over its entire surface. The fibers may be arranged in parallel with a fiber axis direction of the direction z. The fibers can advantageously have a core diameter of 1 μm to 100 μm, particularly advantageously between 1 μm and 50 μm, very particularly advantageously between 1 μm and 10 μm. The fiber optic plate may advantageously have a resolution of 50 to 500 line pairs per millimeter. The optical fibers of the FOP can each have two fiber end faces, namely a first fiber end face and a second fiber end face. The fiber end surfaces may be free of a coating. The first fiber end surfaces may be disposed on a bottom side of the FOP. The second fiber end faces may be disposed on an upper side of the FOP. The top and bottom surfaces of the FOP may be polished to provide planar optically smooth surfaces. The optical fibers can advantageously run in a straight line and advantageously parallel to one another and particularly advantageously both in a straight line and parallel to one another-for example in a fiber axis direction z-from the underside of the FOP to the upper side of the FOP. The fibers can thus end on the underside and on the upper side of the FOP. The FOP may be bounded by the first fiber end faces and the second fiber end faces. The optical fibers may be fixedly embedded in the FOP over their entire length. They can be welded to one another, for example, by a drawing process of a fiber bundle. The fibers can be configured as step index fibers or as gradient index fibers. The top side of the fiber optic front plate may be the light input surface, the bottom side of which may be the front plate connection surface. The top side of the fiber optic backplate may be the backplate connection surface, the bottom side of which is the light exit surface.The diffusion welded joint can be considered as a planar joint which has been produced by diffusion welding. By means of diffusion welding, an inter-diffusion zone can be formed at the connecting surface, i.e. the front plate connecting surface and the rear plate connecting surface lying directly on top of one another, which extends into the fiber-optic front plate and the fiber-optic rear plate to a certain depth, for example between 0.5 μm and 20 μm, preferably between 0.5 μm and 10 μm. The diffusion welded joint may be made without an additive material.The fiber optic front plate can have first optical fibers with first fiber cores, which are each surrounded by one of the first fiber claddings. The refractive index of the first fiber cores may be smaller than the refractive index of the first fiber claddings, so that light conduction in the fiber cores by total reflection is possible.The fiber optic backplate may include second optical fibers having second fiber cores, each surrounded by one of the second fiber claddings. The refractive index of the second fiber cores may be smaller than the refractive index of the second fiber claddings, so that light conduction in the fiber cores by total reflection is possible.The refractive index of the first fiber cores may be equal to the refractive index of the second fiber cores. As a result, an index jump between the first and second fiber cores in the connecting surface can be avoided. The first fiber cores can thus be optically homogeneously connected to the second fiber cores by diffusion welding.In the joint surface, there may be locations in which first fiber sheaths having second fiber cores and first fiber cores having second fiber sheaths overlap. Such sites may cause light losses. It may therefore be advantageous to use optical fibers with as thin claddings as possible for producing the fiber-optic front plate and the fiber-optic rear plate.The glass material of the fiber optic plates, in particular of the front plate, can contain at least one of the elements barium, lead and boron. The glass material may contain these elements as an admixture, for example, by adding a boron compound to a quartz glass material. It is likewise possible for the base material of the optical fibers already to contain one or more of the elements mentioned. Thus, the optical fibers of the fiber optic plate can be made of a lead glass or a borosilicate glass. Such a glass composition can bring about a shielding effect against the mentioned high-energy radiations, in particular against gamma, x-ray and neutron radiation. A high-energy radiation can be understood to mean a radiation which has a quantum energy of more than 10 eV.The first optical fibers, i.e. those of the fiber-optic front plate, can advantageously have a glass material which comprises a lead glass and / or a borosilicate glass. The fiber optic backplate may be lead-free.Fiber optic plates can become dark colored when exposed to high energy radiation, such as gamma x-ray EUV or electron or neutron radiation. This effect can occur even in the case of UV radiation. As a result, the optical attenuation of the fiber optic plate may increase over time. In the case of irradiation with electron radiation, this damage can be caused either by the electrons themselves or by bremsstrahlung radiation in the X-ray range, which occurs when the electrons strike solid-state material. The fiber-optic front plate can therefore advantageously have protection against an increase in attenuation by incident electromagnetic radiation and / or particle radiation. This protection can comprise a doping or admixture, wherein the doping or admixture comprises one or more elements from the group of the elements cerium, gadolinium and lanthanum as dopants. The doping may be present for at least one of the elements mentioned in the above sentence in an amount between 0.01% and 10%, based on the mass of the doping elements to the total mass of the doped glass. Only the fibre cores of the first optical fibres, i.e. the optical fibres of the fibre-optic front plate, can be doped. It is likewise possible for both the first fiber cores and the first fiber claddings to be doped. The doping can be achieved by adding a chemical compound, for example an oxide of the selected dopants, to the glass composition. It is known that a doping comprising the elements cerium, gadolinium and / or lanthanum can counteract the formation of color centers in the glass and thus prevent discoloration. As a result, and due to the shielding effect of the glass matrix mentioned in the preceding paragraph, the radiation resistance of the optical component can be taken over by the fiber-optic front plate, while such a radiation resistance function can be dispensed with for the fiber-optic rear plate. However, the measures for ensuring radiation resistance can lead to an increase in the optical attenuation.The fiber optic backplate may have less optical attenuation than the fiber optic front plate. This can be caused, for example, by the fact that the protection of the fiber-optic front plate mentioned in the preceding paragraph brings about an increased optical attenuation for the transmitted light. If the backplate is free of such protection, it may have less optical attenuation. This may be the case even when the back plate thickness is greater than the front plate thickness.Advantageously, the fiber optic backplate may have a greater plate thickness than the fiber optic front plate. The thickness may be the extension in the z-direction. This can have the advantage, among other things, that extramural scattered light absorption can be better if the rear plate is equipped with such a device.The fiber optic backplate may, but need not, have a different fiber geometry than the fiber optic front plate. The second fibers of the backplate may be thinner than the first fibers of the faceplate. This allows the fiber optic backplate to have a higher resolution than the fiber optic front plate. In a variation of this embodiment, the second fibers of the rear plate may be thicker than the first fibers of the front plate. Both designs can contribute to avoiding Moire patterns during the image recording. In another variation, the front panel may have a same resolution as the rear panel. If the fiber claddings are sufficiently thin, for example the sum of the fiber core areas is 70% to 95% of the total area of the fiber-optic plate, preferably at least 80%, Moire patterns can be weakly pronounced even if the resolutions of the two plates are the same. It may also be possible to compensate Moire patterns by image processing afterwards in the recorded image.Advantageously, the fiber optic backplate may comprise an extramural scattered light absorption device. In this case, the fiber-optic front plate can be, but does not have to be, free of an extramural scattered light absorption device.Advantageously, the light entry surface can have a scintillator layer or a fluorescent layer. This can be provided for converting an incident electromagnetic radiation, in particular a DUV, X-ray or gamma radiation or an incident particle radiation, in particular an electron, proton, neutron or alpha radiation, into a light radiation. The scintillator layer or the fluorescent layer can equally cover the first fiber cores and the first fiber claddings of the light entry surface. It can be formed as a homogeneous layer which extends over the light entry surface. As a result, it can be easily produced.An image recording device according to the invention comprises an optical component described above and an image sensor arranged downstream of the light exit surface.In the image pickup device, the fiber optic backplate may have a higher resolution than the image sensor. The resolution can be indicated in known manner in decomposable line pairs per unit length, for example in lp / mm. The fiber optic backplate may have a resolution of 50lp / mm to 500lp / mm. It is also possible for the image sensor to have a higher resolution than the fiber-optic backplate. Then, the image noise can be reduced by means of binnig.The image sensor can be optically connected to the light exit surface by means of an index matching gel, a cured adhesive or a gap.A method according to the invention for producing an optical component comprises:◯ providing a fiber optic front plate having a light input surface and a front plate connecting surface opposite the light input surface,◯ providing a fiber optic backplate having a backplate connection surface and a light exit surface opposite the backplate connection surface,◯ Contacting of the Front Plate Connection Surface with the Rear Plate Connection Surface◯ establishing a diffusion welded joint of the front plate joint surface with the rear plate joint surface.The diffusion welding can be carried out in a vacuum, in particular a high vacuum. In this case, the fiber-optic front plate and the fiber-optic rear plate can be pressed against one another by means of a pressure force in the z direction. A temperature profile can be passed through in this case. This can be a maximum temperature which can be at least 400° C. and at most 1000° C., preferably at least 430° C. and at most 600° C., and particularly preferably at least 450° C. and at most 500° C. The maximum temperature can advantageously be below the lowest of the glass transition temperatures of the first and second fiber claddings. In this case, at least one of the glass transition temperatures of the first and second fiber cores may be exceeded, if appropriate. In the case of a fiber-optic plate, the glass transition temperature of the fiber cores may be lower than the glass transition temperature of the fiber claddings. If the fiber claddings remain below the glass transition temperature, squeezing of the front and rear plates can nevertheless be avoided, even if the fiber cores should soften. The maximum temperature may also be lower than the lowest of the glass temperatures of the first and second fiber cores, whereby crushing of the front and rear plates can be more securely avoided. However, the diffusion welding process may then take longer. The time duration of the diffusion welding process can be between one hour and 200 hours, preferably between four hours and 100 hours. The time period can be determined from the beginning to the end of the temperature profile without the times for establishing the vacuum and ventilating the vacuum chamber.In diffusion welding, a bracket may be used to maintain positioning of the front and rear panels with respect to each other. The plates can be aligned and / or fixed to one another, for example, at their outer edges.The method for manufacturing an optical component may also include:◯ Production of a scintillator layer or a fluorescent layer on the light entry surface, wherein this step takes place after the production of the diffusion welded connection.The scintillator layer can be produced at a temperature between 200° C. and 600° C., preferably at a temperature from 400° C. to 500° C., particularly preferably between 430° C. and 460° C. The production of the scintillator layer can, for example, involve a sintering process with a peak temperature between 430° C. and 460° C. The diffusion welded connection according to the invention can be produced in a sufficiently temperature-stable manner, so that the diffusion welded connection remains unreleasable at the said peak temperature even if the front and rear plates are no longer pressed against one another with an external compressive force. The scintillator layer can be produced in a vacuum, in particular in a high vacuum, since the diffusion welded connection can be produced free of outgassing additive material.A method for producing an image recording device according to the invention comprises: Manufacturing an optical component of the above description,◯ Providing an Image Sensor. Arranging the image sensor on the light exit surface.The arrangement of the image sensor can advantageously take place after the production of the scintillator layer.The method of manufacturing an image pickup device may further include:◯ filling a gap between the image sensor and the light exit surface with an index matching gel or a curable adhesive.The gap can be filled after the image sensor is arranged on the light exit surface, for example by capillary force of the filler in the gap. However, it can also be carried out by applying the filler to the light exit surface and / or the image sensor already before the arrangement of the image sensor on the light exit surface. Excess filler can then be squeezed out of the gap during the arranging.The figures show the following: FIG. 1 shows a first exemplary embodiment of an optical component in an exploded illustration of an xz section. FIG. 2 shows the first exemplary embodiment in the finished state. FIG. 3 shows a second exemplary embodiment in an exploded illustration of an xz section. FIG. 4 shows a third exemplary embodiment. FIG. 5 shows a fourth exemplary embodiment. FIG. 6 shows a fifth exemplary embodiment in an enlarged detail illustration. FIG. 7 shows a method for manufacturing an optical component and an image recording device.Exemplary EmbodimentsThe invention is explained below using exemplary embodiments.FIG. 1 shows a first exemplary embodiment of an optical component in an exploded illustration of an xz section. An optical component 1 is shown comprising a fiber-optic front plate 2 with a light entry surface 5 and a front plate connection surface 6 opposite the light entry surface 5, and a fiber-optic rear plate 7 with a rear plate connection surface 11 and a light exit surface 15 opposite the rear plate connection surface 11. This figure similarly illustrates both plates before they have been joined.FIG. 2 shows the first exemplary embodiment in the finished state. In this case, the fiber-optic front plate 2 is firmly connected to the fiber-optic rear plate 5 by means of a diffusion welded connection 12 of the front plate connecting surface 6 to the rear plate connecting surface 11.In a specific embodiment of the first exemplary embodiment, the fiber-optic rear plate 7 has a lower optical attenuation than the fiber-optic front plate 2.In another specific embodiment of the first embodiment, the fiber optic back plate 7 has a greater plate thickness than the fiber optic front plate 2.Reference numeral 13 denotes the position of a cutout which is described in the fifth exemplary embodiment.FIG. 3 shows a second exemplary embodiment in an exploded illustration of an xz section. In addition to the first exemplary embodiment according to FIG. 1, the light entry surface has a scintillator layer 21 or a fluorescent layer 21. This serves for converting an incident electromagnetic radiation, in particular a DUV, X-ray or gamma radiation or an incident particle radiation, in particular an electron, proton, neutron or alpha radiation, into a light radiation. Optionally, an image sensor 17 can be provided downstream of the light exit surface 15.FIG. 4 shows a third exemplary embodiment. An image recording device 16 is shown, comprising an optical component 1 according to one of the preceding claims and an image sensor 17 arranged downstream of the light exit surface 15. The optical component 1 here comprises a fiber-optic front plate 2 and a fiber-optic rear plate 7. Here, the image sensor 17 is coupled to the light exit surface 15 via a narrow gap 18. In modifications of the second exemplary embodiment, the image sensor 17 can be placed directly in contact on the light exit surface 15 or the image sensor 17 can be optically connected to the light exit surface 15 by means of an index matching gel 19, a cured adhesive 19. The latter can mean that the gap 18 between the image sensor 17 and the light exit surface 15 has been filled with an index matching gel 19 or a curable adhesive 19.FIG. 5 shows a fourth exemplary embodiment. The illustration shows a detection device 17 comprising an optical component 1 and an image sensor 17 arranged downstream of the light exit surface 15. The optical component 1 here comprises a fiber-optic front plate 2 having a light entry surface 5 which is provided with a scintillator layer 21 or a fluorescent layer 21, and a fiber-optic rear plate 7. Here, the image sensor 17 is coupled to the light exit surface 15 via a narrow gap, which has been filled with an index matching gel 19 or a curable adhesive 19.FIG. 6 shows a fifth exemplary embodiment in an enlarged detail illustration. The cutout 13 comprises a region of the optical component 1 around which. In the junction plane 14, the front plate junction surface 6 of the fiber optic front plate 2 is joined to the rear plate junction surface 11 of the fiber optic rear plate 7 by means of a diffusion welded joint 12.The fiber optic front plate 2 has first optical fibers with first fiber cores 3, which are each surrounded by one of the first fiber claddings 4. The refractive index of the first fiber cores 3 is smaller than the refractive index of the first fiber claddings 4, so that light conduction in the fiber cores 3 by total reflection is possible.The fiber-optic backplate 7 has second optical fibers with second fiber cores 8, which are each surrounded by one of the second fiber claddings 9. The refractive index of the second fiber cores 8 is smaller than the refractive index of the second fiber claddings 9, so that light conduction in the fiber cores 8 by total reflection is possible.The refractive index of the first fiber cores 3 may be equal to the refractive index of the second fiber cores 8. This makes it possible to avoid an index jump between the first and second fiber cores in the connecting plane 14. The fibre cores can thus be optically homogeneously connected.It is also clear in the figure that there can be locations in the connection plane in which first fiber claddings 4 overlap with second fiber cores 8 and first fiber cores 3 overlap with second fiber claddings 9. Such sites may cause light losses. It may therefore be advantageous to use optical fibers with as thin claddings as possible for producing the fiber-optic front plate 2 and the fiber-optic rear plate 7.In the fifth embodiment shown, the fiber optic backplate 7 has a different fiber geometry than the fiber optic front plate 2, the second fibers of the backplate 7 are formed thinner than the first fibers of the front plate 2, and as a result, the fiber optic backplate 7 can have a higher resolution than the fiber optic front plate 2, In a variation of the embodiment not shown, the second fibers of the backplate 7 are formed thicker than the first fibers of the front plate 2, and both formations can contribute to avoiding Moire patterns during the image recording. In a further variation of the embodiment, which is not shown in the drawing, the front plate 2 can have the same resolution as that of the rear plate 7.Optionally, the fiber optic backplate 7 may include an extramural scattered light absorber 4. This can be present in the form of the statistically distributed black-colored fibers 10 shown here or in the form of other known EMA designs, which are not shown in the drawings.FIG. 7 shows a method for manufacturing an optical component and an image recording device. The method comprises:• Provision 22 of a fibre-optic front plate 2 having a light entry surface 5 and a front plate connection surface 6 opposite the light entry surface,• Providing 23 a fibre optic backplate 7 having a backplate interface 11 and a light exit surface 15 opposite the backplate interface 11,• Bringing 24 the front plate connecting surface 6 into contact with the rear plate connecting surface 11,• Making 25 a diffusion welded joint 12 of the front plate joint surface 6 with the rear plate joint surface 11.In a further modification, the method further comprises:• Production 26 of a scintillator layer 21 or a fluorescent layer 21 on the light entry surface 5, wherein this step takes place after the production of the diffusion welded connection 12.In a second modification, the method is also for manufacturing an image recording device 16 and also comprises the steps of:• Providing 27 an image sensor 17.• Arranging 28 the image sensor on the light exit surface 15.It should be noted that the figures are not drawn to scale.Reference numerals uniformly used in all figures are as follows: 1 optical component 2 fiber optic front plate 3 first fiber cores 4 first fiber claddings 5 light input surface 6 front plate connection surface 7 fiber optic rear plate 8 second fiber cores 9 second fiber claddings 10 extramural scattered light absorbing means (engl. Extramural Absorber - EMA) 11 Backplate interface 12 Diffusion welded joint 13 Cutout 14 Joint plane 15 Light exit surface 16 Imaging device 17 Image sensor 18 Slit 19 Adhesive, Index Matching Gel 20 Detection device 21 Scintillator 22 Providing Fiber optic faceplate 23 Providing Fiber optic backplate 24 Contacting the faceplate interface with backplate interface 25 Making a diffusion welded joint of the faceplate interface with backplate interface 26 Making a scintillator layer or a fluorescent layer on light entry surface 27 Providing Image sensor 28 Placing the image sensor on the light exit surface

Claims

Optical component (1) comprising a fibre-optic front plate (2) having a light entry surface (5) and a front plate connection surface (6) opposite the light entry surface (5), and a fibre-optic rear plate (7) having a rear plate connection surface (11) and a light exit surface (15) opposite the rear plate connection surface (11), wherein the fibre-optic front plate (2) is firmly connected to the fibre-optic rear plate (5) by means of a diffusion welded connection (12) of the front plate connection surface (6) to the rear plate connection surface (11).The optical component (1) of claim 1, wherein the fiber optic backplate (7) has a lower optical attenuation than the fiber optic front plate (2).The optical component (1) according to any one of the preceding claims, wherein the fiber optic back plate (7) has a different fiber geometry than the fiber optic front plate (2).Optical component (1) according to one of the preceding claims, wherein the fiber-optic rear plate (7) has an extramural scattered light absorption device (4) and / or the fiber-optic front plate (2) is free of an extramural scattered light absorption device.The optical component (1) according to any one of the preceding claims, wherein the fiber optic back plate (7) has a larger plate thickness than the fiber optic front plate (2).Optical component (1) according to one of the preceding claims, wherein the fiber-optic front plate (2) has a protection against an increase in the attenuation by an incident electromagnetic radiation and / or a particle radiation, in particular a doping comprising one or more of the group of elements boron, cerium, gadolinium and lanthanum in an amount of between 0.01% and 10%.Optical component (1) according to one of the preceding claims, wherein the fiber-optic front plate (2) has first optical fibers (3, 4) made of a glass material which comprises a lead glass and / or a borosilicate glass and / or the fiber-optic rear plate (7) is embodied to be lead-free.Optical component (1) according to one of the preceding claims, wherein the light entry surface (5) has a scintillator layer (21) or a fluorescent layer (21) for converting an incident electromagnetic radiation, in particular a DUV, X-ray or gamma radiation or an incident particle radiation, in particular an electron, proton, neutron or alpha radiation, into a light radiation.Image recording device (16), comprising an optical component (1) according to one of the preceding claims and an image sensor (17) arranged downstream of the light exit surface (15).The image pickup device (16) according to claim 9, wherein the fiber optic backplate (7) has a higher resolution than the image sensor (17).Image recording device (16) according to Claim 9 to 10, wherein the image sensor (17) is optically connected to the light exit surface (15) by means of an index matching gel (19), a cured adhesive (19) or a gap (18).A method for manufacturing an optical component (1) comprising: ◯ providing (22) a fibre optic front plate (2) having a light input surface (5) and a front plate connection surface (6) opposite the light input surface, ◯ providing (23) a fibre optic rear plate (7) having a rear plate connection surface (11) and a light output surface (15) opposite the rear plate connection surface (11), ◯ bringing (24) the front plate connection surface (6) into contact with the rear plate connection surface (11) ◯ establishing (25) a diffusion welded connection (12) of the front plate connection surface (6) with the rear plate connection surface (11).Method for producing an optical component (1) according to Claim 12, furthermore comprising: o producing (26) a scintillator layer (21) or a fluorescent layer (21) on the light entry surface (5), wherein this step takes place after the production of the diffusion welded connection (12).Method for producing an image recording device (16), comprising ◯ producing an optical component (1) according to one of Claims 12 to 13, ◯ providing (27) an image sensor (17). ◯ arranging (28) the image sensor on the light exit surface (15).The method for manufacturing an image pickup device (16) according to claim 14, further comprising: ◯ filling a gap (18) between the image sensor (17) and the light exit surface (15) with an index matching gel (19) or a curable adhesive (19).

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