EP2627991A1 - Optischer evaneszenzfeldsensor - Google Patents
Optischer evaneszenzfeldsensorInfo
- Publication number
- EP2627991A1 EP2627991A1 EP11776316.9A EP11776316A EP2627991A1 EP 2627991 A1 EP2627991 A1 EP 2627991A1 EP 11776316 A EP11776316 A EP 11776316A EP 2627991 A1 EP2627991 A1 EP 2627991A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- optical
- sensor
- sensor device
- optical waveguide
- optical layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/55—Specular reflectivity
- G01N21/552—Attenuated total reflection
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/7703—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator using reagent-clad optical fibres or optical waveguides
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/13—Integrated optical circuits characterised by the manufacturing method
- G02B6/138—Integrated optical circuits characterised by the manufacturing method by using polymerisation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
- G06F3/0202—Constructional details or processes of manufacture of the input device
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0274—Optical details, e.g. printed circuits comprising integral optical means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N2021/7769—Measurement method of reaction-produced change in sensor
- G01N2021/7776—Index
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N2021/7769—Measurement method of reaction-produced change in sensor
- G01N2021/7783—Transmission, loss
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/96—Touch switches
- H03K17/9627—Optical touch switches
- H03K17/9631—Optical touch switches using a light source as part of the switch
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/96—Touch switches
- H03K17/9627—Optical touch switches
- H03K17/9638—Optical touch switches using a light guide
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10007—Types of components
- H05K2201/10106—Light emitting diode [LED]
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10007—Types of components
- H05K2201/10151—Sensor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
Definitions
- the invention relates to an optical sensor device having a substrate, on which at least one light source, preferably an LED, is arranged, from which at least one optical waveguide leads to at least one receiver, preferably a photodiode, wherein the optical waveguide in a sensor region for a change there available evanescent field is accessible.
- Such a sensor device in the form of an optical switch or button is known in which the disorder of an evanescent field of an optical waveguide is exploited to perform a switching function.
- the optical waveguide extends between a light transmitter, that is a light source and a sensor or receiver to which an evaluation unit is connected, and it is accessible in the region of approximately Berüh ⁇ surface.
- a Lichtre ⁇ flexion occurs in the surface of the optical waveguide in the non-contact state. Touching this surface disturbs the evanescent field propagating in this area and thus the light propagation. This leads to a signal attenuation, which is evaluated as a switching signal.
- Absorption measurement used analyte can be detected.
- biosensors or chemosensors are devices that can qualitatively or quantitatively detect an analyte with the aid of a signal converter and a recognition reaction.
- the recognition reaction is generally referred to as the specific binding or reaction of an analyte with a recognition element.
- recognition reactions are the binding of ligands to complexes, the complexation of ions, the binding of ligands to receptors, membrane receptors or ion channels, of antigens or haptens to antibodies, of
- specific analytes e.g., gases or liquids such as ethanol, CFCs .
- analyte's absorption spectrum e.g., alcohol
- biosensors or chemosensors can be used in environmental analysis, in the food industry, in human and veterinary diagnostics and in crop protection in order to qualitatively and / or quantitatively determine analytes.
- tactile sensors of the type of interest here are optical sensors which detect touches on the sensor surface. If the detection signal is detected and further processed, for example carried out a further function, the push button is part of a switch.
- Such an optical switch or switch has considerable advantages due to its freedom from current.
- the use of such a switch particularly in high in sensitive areas where good EMC compatibility is required, ie in which there are as few electromagnetic fields as possible, as is the case with a power line
- optical sensor and button could also be used in potentially explosive atmospheres, since it can not generate sparks due to the currentless operation.
- the optical structure does not require any mechanically moving parts, which makes it not susceptible to wear and virtually maintenance-free.
- optical sensor devices described here operate on the principle of influencing the evanescent field of an optical waveguide.
- Optical waveguides are a class of signal transducers that can detect the change in optical properties of a medium adjacent to a waveguiding layer. When light is transported as a guided mode in the waveguiding layer, the light field at the interface falls
- Medium / waveguide not abruptly, but sounds in the adjacent to the waveguide so-called detection medium exponentially.
- This exponentially decaying light field is called an evanescent field. If the optical properties of the medium adjacent to the waveguide (e.g., change in optical refractive index, luminescence, absorption) vary within the evanescent field, this may be achieved by appropriate means
- Measurement setup to be detected Crucial for the use of waveguides as signal transducers in bio-, chemo- or tactile sensors is that the change in the optical properties of the medium only very close to the surface of the
- Optical waveguide is detected.
- the main problem of such a sensor device is a compact integrated optical waveguide system, in which both the light source, the light sensor and the optical waveguide, which must also be formed in three dimensions, since it should be guided to the surface of the sensor array.
- the light-guiding elements have been realized as mentioned either by fiber technology (glass fibers or polymer fibers), However, which are very cumbersome to handle, or through layer structures that require at least two different materials and also limit the design of the optical fiber structure.
- coupling elements are required, which couple the light from the light emitter into the optical waveguide and decouple it from the optical waveguide back to the detection component.
- These coupling elements can be constructed, for example, as optical grids, prisms or lens systems.
- the opto-electronic components are externally coupled to the light-conducting elements. In general, the construction of such a sensor system is very complex and expensive, which predestines it not for the production in large quantities. Furthermore, they are not very compact and thus can not meet the general desire for integration and miniaturization in the sensor and analytics sector.
- the object of the invention is therefore to provide an optical sensor device of the type mentioned, which can be realized in the form of a compact, integrated, stable unit, which is characterized by great robustness and stability, nonetheless by a high sensitivity and a good response. Furthermore, this should
- Sensor device be accessible to a miniaturized design.
- the present sensor device should be usable for a variety of purposes, as v.a. when
- Tast field
- switching device but also as a biosensor or chemosensor.
- the photopolymerizable material is mounted, in which the optical waveguide is structured by an exposure process, preferably a Mehrphotonenabsorptionsrea, wherein the optical waveguide is guided in the sensor region to the surface of the optical layer.
- the optical waveguide is structured by an exposure process, preferably a Mehrphotonenabsorptionsrea, wherein the optical waveguide is guided in the sensor region to the surface of the optical layer.
- the light wave is thus lenleiter by an exposure process known per se, preferably the per se known Mehrphotonenabsorptions- structuring rationstechnologie (usually two-photon absorption structuring, TPA - Two Photon Absorption) realized, wherein preferably the production of a three-dimensional optical waveguide is made possible.
- the term "three-dimensional” means both a possible course of the optical waveguide in the x-, y- and z-direction, ie a "spatial" course, as well as an embodiment of the optical waveguide itself, in terms of its cross-sectional shape, in any dimensions for example, to vary the cross-section from circular to elliptical or approximately rectangular, but also semicircular, etc., and vice versa.
- the described structuring offers very special advantages for achieving a highly efficient sensor field, since in the sensor field region the optical waveguide has, for example, a broadened structure, a split structure, but also a wavy curved structure, with several arcs bordering on the surface, or a flattened wide structure (with For example, a semicircular cross-section, with the flat side up) may have.
- a broadened structure for example, a split structure, but also a wavy curved structure, with several arcs bordering on the surface, or a flattened wide structure (with For example, a semicircular cross-section, with the flat side up) may have.
- a semicircular cross-section with the flat side up
- the light source, the photodiode and possibly also the evaluation unit can be embedded in the optical layer.
- the substrate can simply be a printed circuit board substrate.
- the optical layer may be a glassy organic-inorganic hybrid polymer, such as that known by the name ORMOCER®. Hybrid polymer be used zt which. Due to its glassy properties and chemical stability for a sensor field, such as a tactile display or a sensor in aggressive media, is well suited.
- Other suitable materials include flexible materials, such as polysiloxanes, which are also very useful as waveguide material.
- the optical layer may also be elastically yielding, at least in the sensor area.
- a plurality of optical waveguides in particular also intersecting one another within the optical layer, wherein optionally a matrix arrangement is provided so as to provide, for example, a touch panel or a keyboard.
- a matrix arrangement is provided so as to provide, for example, a touch panel or a keyboard.
- marks may also be provided underneath the sensor arrays, such as on the surface of the substrate or circuit board layer so as to provide the respective sensor fields, e.g. Touch panels to display adequately.
- a display e.g. a touchscreen could be realized.
- the training of the invention is a very compact optical sensor device, such. a bio or chemosensor, a light switch or the like. , allows, in which all relevant parts, namely light source, optical waveguide and light sensor and optionally evaluation unit, can be integrated in a thin optical layer.
- the production of the sensor device can moreover be carried out fully automatically, since both the assembly of the substrate with the components and the 3D structuring of the optical waveguide with the aid of the TPA method of machine processing is very easily accessible.
- the present optical sensor device can be set up for a wide variety of purposes.
- predetermined chemical receptors which extend into the medium adjacent to the optical layer. These receptors are intended or furnished for the binding of certain analytes to be detected. If, in a specific case, a certain analyte to be detected is present adjacent to the optical layer, then this analyte binds to the receptor intended for it, whereby the refractive index at the interface of the optical layer to the environment, to the neighboring medium, changes a change in the evanescent field and thus the light intensity in the optical waveguide leads.
- a medium is provided with an analyte, which is not transparent to all wavelengths of the transported light.
- an analyte which is not transparent to all wavelengths of the transported light.
- the present optical sensor device can be designed as an optical touch field device in which the evanescent field adjacent to the sensor area (touch field) is disturbed by approaching an absorbing material, such as the foil of a button or a finger; characterized the herbeige ⁇ resulted decrease in the light intensity in the optical waveguide can now be detected, whereby the optical sensor device can be used as a button or switch.
- the optical sensor device can be designed with a plurality of sensor regions, that is to say "sensor parts", which react independently of one another; especially for example, these partial sensors can be obtained by intersecting lightwave conductors , so that a type of sensor matrix is formed.
- This can be utilized in this case an optical sensor device (a keyboard) or a touch-PA to realize a keyboard nel, in the case of a biosensor or chemosensor also by a corresponding sensor array can be provided ⁇ the.
- the sensor fields in particular touch fields, may also be marked by markings under the optical layer, e.g. on the surface of the printed circuit board (of the printed circuit board substrate) are displayed.
- an image display device a display, could also be located underneath the optical layer so as to realize a touchscreen.
- the optical layer may have a thickness of, for example, 200 ⁇ or 300 ⁇ in the area of the integrated components, but the thickness of the layer may be less in the regions where only waveguides but no components are present, for example 100 ⁇ or less Save material and / or increase the flexibility of the material.
- a strong of miniaturization ⁇ tion is achieved, which, for example in electronics areas offers a particular advantage for input units.
- touch fields in the mobile sector, in mobile devices can be realized with great advantage.
- the sensor device can be flexible and even transpa ⁇ rent, leading to special design possibilities. Since the sensor device operates without current, there are special applications in highly sensitive areas where electromagnetic fields would interfere with electrical sensors, but they can not influence the present optical sensor device. The sensor device could also be used in potentially explosive atmospheres because no sparks can occur due to the currentless mode of operation. Mechani ⁇ cal parts that are susceptible to wear, are avoided, and the optical sensor device is thus virtually maintenance-free.
- the invention also has a printed circuit board element with an optimum See sensor device as stated above the subject, wherein the substrate is a printed circuit board substrate or a printed circuit board layer, such as epoxy resin, optionally with glass fiber ⁇ reinforcement.
- the printed circuit board substrate may also be flexible, for example, be a polyimide film, and it may, for example, not just, but also "bent" on a cylindrical body, for example.
- the invention relates to a method for producing such an optical sensor device, wherein it is provided that on a substrate, e.g. a printed circuit board layer, the at least one light source and the at least one receiver, optionally also the evaluation unit, attached and in
- photopolymerizable material of the optical layer are cast, after which the at least one optical waveguide is patterned by Mehrphotonenabsorption in the optical layer.
- the patterning of an optical waveguide in an optical layer is known per se by an exposure process, cf. eg US 6 690 845 B1; in particular, the patterning with the help of multi-photon absorption and two photon absorption from AT 413 891 B and AT 503 585 A is known per se, and it is also known, the focus for writing of the optical waveguide in the shape and size to be changed ⁇ countries, so that a thinner or thicker waveguide can be realized. Furthermore, the position of the focal point can be varied in three dimensions so as to inscribe the optical waveguide in the x, y and z directions.
- the electronic components depending on the design and depending on the layer thickness of the optical material, for example, 100 ⁇ or even 200 ⁇ ⁇ lie below the surface of the optical layer.
- the optical waveguide is led directly to the surface, ie with a local "depth" of 0 pm below the surface
- the evaluation unit evaluates the intensity of the transmitted light signals, and this evaluation unit can also be integrated in the optical layer. Without disturbing the evanescent field, e.g. by approaching an object or touching, the evaluation unit will detect a maximum signal intensity. If now the evanescent field of light, which is outside the light source conductor, disturbed, such as if an object, e.g. a finger, moved to the sensor field or placed on it, then leads, this to the decrease in intensity of the light guided in the optical waveguide. This decrease in intensity is registered by the evaluation unit, so that e.g. a "tactile contact" or "switching request" is detected.
- FIG. 1 is a general schematic sectional view of an optical sensor device according to the invention
- FIGS. 2A and 2B show an optical sensor device according to the invention in the form of a touch panel device, with a sensor area enlarged in comparison with FIG. 1, in a schematic sectional illustration (FIG. 2A) or in plan view (FIG. 2B);
- Fig. 3 is a schematic plan view of another optical sensor device according to the invention.
- FIG. 4 is a schematic sectional view of still another sensor device, showing an enlarged sensor area and omitting the electro-optical components;
- FIGS. 5A and 5B show a further sensor region of an optical sensor device according to the invention in a longitudinal section (Fig. 5A) and cross section (Fig. 5B);
- FIGS. 6 and 7 show two further sensor devices according to the invention, for (bio) chemical analyzes, in schematic sectional representations;
- Fig. 8 schematically shows a plan view of a part of a matrix arrangement of sensor areas, e.g. to realize a keyboard, a sensor array or a touchscreen.
- FIG. 1 schematically shows an optical sensor device 1 which has an optical layer 3 on a substrate 2, for example a conventional printed circuit board layer.
- a light source 4 for example an LED
- a light sensor or receiver 5 for example a photodiode
- the evaluation unit 6 is connected via an unspecified electrical connection, for example copper tracks on the substrate 2, to the receiver 5 in order to evaluate its output signals, which reflect the light intensity of the received light.
- an optical waveguide 7 which in a known manner by a TPA process in the photopolymerizable material of the optical layer 3 in the desired manner , with the desired course and the desired cross-section, is structured.
- the optical waveguide 7 in a sensor region 8, for example, an actuating or Tastfeldbe ⁇ rich, brought to the surface 9 of the optical layer 3 so that it runs directly on this surface 9 (or something darun ⁇ ter) a stretch long and so defines a sensitive to disturbances of the evanescent field of the optical waveguide 7 area.
- the optical waveguide 7 forms a first medium
- the environment above the optical layer 3 forms a second medium 10, which may be a gas or liquid.
- this sensor area 8 e.g. an object that
- Optical waveguide 7 is approached or with the object, the surface 9 is touched or pressed in the area 8, so there is propagating Evaneszenzfeld the optical waveguide 7, which results in a reduction in the intensity of the transmitted light in the optical waveguide 7. This will lead to a reduced electric current at the receiver 5, which is detected in the evaluation unit 6.
- the optical layer 3 of photopolymerizable material and, preferably, the TPA structuring technology, such as in AT 413 891 B or AT 503 858 A
- a compact unit for the sensor device 1 can be achieved, wherein the electro-optical components 4, 5, 6 are arranged on the substrate 2 and embedded in the optical layer 3.
- the optical waveguide 7 is directly integrated into this assembly by its structuring in the optical layer 3, so that no separate component is necessary for this, in contrast to the prior art.
- the thickness (height in Fig. 1) of the optical layer 3 - depending on the design of the components 4, 5, 6 - be, for example, only 100 ⁇ or 200 ⁇ , but nonetheless precise optical fiber guide from the light source 4 away to the sensor area 8 on the surface 9 and from there to the light receiver 5 is possible.
- an extremely efficient, accessible to miniaturization sensor device can be obtained, and it is also conceivable to perform the entire unit flexible and / or perform within a circuit board as part thereof.
- sensor areas 8 wherein also a matrix can be provided to realize a touch panel or a keyboard, as will be explained in more detail below with reference to FIG. 8.
- the sensor regions 8 can also be identified by markings visible to the eye so as to be able to touch the regions 8 in a targeted manner.
- the optical layer 3 may also be a display so as to realize a plurality of sensor or touch areas 8 a touch screen.
- the substrate 2 for example, a conventional Leiterplattenlagen- (epoxy resin) substrate
- the light source 4, the receiver 5 and the evaluation unit 6 but which may also be located outside the unit 1) - preferably automatically - mounted;
- these electro-optic or electronic components 4, 5, 6 are cast in the photopolymerizable material of the optical layer 3.
- the optical waveguide 7 is "inscribed" between the light source 4 and the receiver 5, being guided in the sensor region 8 to the surface 9 of the optical layer 3 (eg an interface between optical material and air) Area 8 away, the optical waveguide 7 again extends within the optical layer 3 to the receiver 5, ie to its detection field
- areas of the optoelectronic components 4, 5 are, for example, 20 ⁇ m to 200 m below the surface 9 of the optical layer 3.
- the optical waveguide 7 directly touches the surface 9, i. the interface between the optical material and air, i. so there is a distance of 0 between the optical waveguide 7 and the surface 9 in this area 8; at least there will be the
- Optical waveguide 7 brought very close to the surface 9, e.g. 0-10 pm below. This change in position of the optical waveguide 7 in the z-direction (height direction) can be realized with the TPA process in the simplest manner.
- the photopolymerizable material of the optical layer 3 is fixed so that a finished, e.g. flexible or rigid, structural unit is obtained.
- the intensity of the light signals is evaluated with the aid of the evaluation unit 6, so that analytes or touch or switching requests are detected in this way if the evanescent field of the optical waveguide 7 is influenced or disturbed, for example due to a Object, such as a finger, in the sensor area 8, in the medium 10, the optical waveguide 7 is approximated (which may possibly also come to a touch).
- This disturbance of the evanescent field of the light outside the optical waveguide 7 causes a decrease in the intensity of the light guided in the optical waveguide 7, which is detected and evaluated.
- the light used is of course not limited to the wavelength range of visible light, but may also be in the UV or IR spectrum.
- FIGS. 2A and 2B in a schematic longitudinal section and a schematic plan view, as a specific example of a sensor device 1 is a Tastfeld transformer is shown which corresponds We ⁇ sentlichen of the sensor device 1 according to Fig. 1, so that a renewed detailed description is unnecessary.
- Fig. 2B is now the
- the sensor or sensing range 8 zoom (and back again) is moved, it recognizes the off ⁇ value unit 6 according to the change in the Intensity of the light in the optical waveguide 7, via the receiver 5, as a tactile or
- Fig. 3 2B is compared to the embodiment according to FIG. If a modification shown in ⁇ when there (in the scanning range transmitter sor Scheme) 8 of the optical waveguide 7 is split to produce a plurality of separate optical fiber branches 7B, said optical fiber branches 7B but not touch each other directly (which would lead to the widened structure of FIG. 2B).
- the optical waveguide 7 in the sensor region 8 has a wavy curved structure 7C, with a plurality of arcs 7D bordering the surface 9 of the optical layer 3.
- a stronger evanescent field is produced in the zones with a smaller radius of curvature of the optical waveguide 7, so that the light weakening becomes even greater in the event of a disturbance of this evanescent field allows.
- the optical waveguide 7 is "cut" in the region of the touchpad 10 on the surface 9 of the optical layer 3, so that in the region of the sensor region 8 for the optical waveguide 7 a flattened
- Structure 7E approximately with a cross section in a semicircular or semi-elliptical shape, as shown in particular in Fig. 5B, given.
- This is made possible in the course of the three-dimensional TPA structuring, wherein the optical waveguide 7 is not only brought into contact (tangentially) with the writing surface 9, but is structured so that it is only partially in the material of the optical layer 3; a part of the focus area of the laser beam used for writing then lies above the surface 9, i. outside of the optical layer 3, so that instead of a full cross-section of the optical waveguide 7 in this area directly adjacent to the surface 9 only a partial cross-section is given.
- the sensor or contact surface of the optical waveguide 7 is increased at the surface 9 in the region 8, the size of the optical waveguide 7 in the z-direction, however, reduced.
- Such a "cut” optical waveguide 7 in the sensor region 8, as shown in Fig. 5, can also be produced as mentioned by the TPA technology in an advantageous manner, a comparable training would be unthinkable with the ⁇ known technology, with discrete components ,
- an optical sensor device 1 is shown, which is essentially what the attachment of the optical layer 3 on a substrate 2, the embedding of a light source 4, a light receiver 5 and an evaluation unit 6 in the optical material of the optical layer 3 and the TPA Structuring of the optical waveguide 7 and its course in a sensor area 8 at or near the surface of the optical layer 3, the embodiments of FIG. 1 or Fig. 2A corresponds, so that a re-description thereof is unnecessary.
- predetermined receptors 12 are now anchored to the surface of the optical layer 3, these receptors 12 extending into the second medium 10, which in turn may be, for example, a liquid or a gas.
- the second medium 10 which in turn may be, for example, a liquid or a gas.
- these receptors 12 are indicated only very schematically, as well as to be detected analytes 13 in the outer, second medium 10. If now such an analyte to be detected 13 binds to a receptor 12, thereby changing the refractive ⁇ index at the Interface between the optical waveguide 7, the first medium, to the second medium 10; this in turn leads to an alteration of the evanescent field and hence to a ⁇ Ver change in light intensity in the optical fiber 7 (first medium). This change in the light intensity in the optical waveguide
- FIG. 8 in the embodiment of FIG. 6 similar to FIG. 2B, FIG. 3, Fig. 4 or Fig. 5B shown to be so
- this also applies to other exemplary embodiments, such as the exemplary embodiment of the optical sensor device 1 according to the invention to be described with reference to FIG. 7, with which certain analytes to be detected can be detected directly on the basis of their optical properties.
- the optical sensor device 1 according to FIG. 7 is designed like the previously described sensor devices 1, according to FIGS. 1, 2A, 6 (but also FIGS. 3 and 5), so that a further description can be dispensed with.
- an outer, second medium 10 is located above the optical layer 3, the optical waveguide 7 defining a first medium in the sensor region 8.
- the outer medium 10 contains, for example, an analyte 14, such as ethanol, which is not transparent for all wavelengths of the light transported in the optical waveguide 7. Accordingly, these special wavelengths are absorbed by the analyte 14 via the propagation in the evanescent field, in the sensor region 8. This in turn alters the intensity of the light in the optical fiber, selectively for the particular wavelengths. As a result, it is possible to qualitatively and / or quantitatively determine the analyte 14.
- the optical sensor device 1 can be extremely compact be, with all relevant components (light source 4, optical fiber
- light receiver 5, optionally evaluation unit 6) can be integrated in a thin optical layer 3.
- the production of this sensor device 1 can be carried out fully automatically, since both the assembly of the components 4, 5, 6 and the 3D structuring of the optical waveguide 7 a machine processing are very accessible.
- optical layer 3 is thick, if at all, for example only a few hundred ⁇ m thick, a highly miniaturized embodiment of an optical sensor device 1 can be obtained which can be used for a wide variety of sensor applications, such as those described above with reference to FIGS. 6 and 7 . as input units in electronics areas.
- the biosensors or chemosensors described can be used in environmental analysis, in the food industry, in the human and
- Veterinary diagnostics and in crop protection can be used to qualitatively and / or quantitatively determine analytes.
- Switch or touch panel devices v.a. also of great interest in the area of mobile applications.
- this Fig. 8 shows only very schematically a plan view of indicated with simple lines optical waveguide 7 and matrix-like arranged sensor areas 8, wherein in these Sensorbe ⁇ rich 8 intersecting optical waveguide 7 as shown in Fig. 1, Fig. 2A, etc. shown the surface of the optical layer 3 (not shown in Fig. 8) are introduced; however, in the intermediate areas they are at a distance from the surface 9 (see Fig. 1) of the optical layer 3, so that there is no influence on evanescent fields.
- markers 15 or more generally representations or displays or image display elements are 'provided to .
- a keyboard or the like such as a keyboard or the like.
- Key ' field but possibly also to realize a kind of touch screen.
- the output ends of the optical waveguides can be brought to different light receivers 5 or at least to different detector areas of light receivers 5 both in accordance with the rows and in accordance with the columns, so that they can be unambiguously identified in the area of the light receivers 5.
- the optical waveguides 7 on the input side to a common light emitter 4 optionally, if the Platzver ⁇ conditions allow this, even all the optical waveguide 7 of all rows and columns, coupled.
- the optical waveguide 7 all lines are coupled to a light emitter and the optical waveguide 7 of all columns to another light emitter.
- each optical waveguide 7 at least for each of the column optical waveguides and for each of the line optical waveguides, a separate light source with a wavelength predetermined for the respective optical waveguide 7, wherein on the detector side (light receiver 5) can be uniquely identified due to the respective wavelength or frequency of the respective optical waveguide so as to detect the respective matrix point.
- the present sensor device 1 can be made rigid, but also flexible and, if desired, also transparent, which leads to new application and design possibilities. It is also advantageous that the present optical sensor device works as mentioned current-free, so that there are special applications in highly sensitive areas where electromagnetic fields would interfere with electrical structures.
- the present optical sensor device 1 can also be used in potentially explosive atmospheres, since they are caused by the electroless operation can not form sparks. Because the present sensor device 1 does not require any mechanically moving parts, it is also not prone to wear and virtually maintenance-free.
- a generally rectangular cross-section of the optical waveguide 7 is also conceivable, and it is also possible to have such widened structures of the optical waveguide 7, including those as shown in FIGS. 2B and 3 or 5B, e.g. to combine with the waveform of FIG. 4.
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Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0063510U AT12382U1 (de) | 2010-10-14 | 2010-10-14 | Optische sensoreinrichtung |
PCT/AT2011/000428 WO2012048359A1 (de) | 2010-10-14 | 2011-10-14 | Optischer evaneszenzfeldsensor |
Publications (1)
Publication Number | Publication Date |
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EP2627991A1 true EP2627991A1 (de) | 2013-08-21 |
Family
ID=45561287
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP11776316.9A Withdrawn EP2627991A1 (de) | 2010-10-14 | 2011-10-14 | Optischer evaneszenzfeldsensor |
Country Status (4)
Country | Link |
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US (1) | US20130202488A1 (de) |
EP (1) | EP2627991A1 (de) |
AT (1) | AT12382U1 (de) |
WO (1) | WO2012048359A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
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GB2502313A (en) * | 2012-05-24 | 2013-11-27 | Ibm | Manufacturing three dimensional photonic device by two photon absorption polymerization |
US9470858B2 (en) | 2013-01-11 | 2016-10-18 | Multiphoton Optics Gmbh | Optical package and a process for its preparation |
US9213418B2 (en) * | 2014-04-23 | 2015-12-15 | Peigen Jiang | Computer input device |
EP3499215B1 (de) | 2017-12-15 | 2023-06-28 | ams AG | Partikeldichte-sensor unter verwendung der evaneszenz eines wellenleiters |
EP3599541B1 (de) * | 2018-07-26 | 2023-12-13 | University of Vienna | Optischer wellenleiter-lichtemitter und berührungsbildschirm |
CN110068532B (zh) * | 2019-04-18 | 2024-03-05 | 浙江东方职业技术学院 | 内置分光光纤做信号指示的点型光纤感烟火灾探测器 |
DE102019121843A1 (de) | 2019-08-13 | 2021-02-18 | B.Braun Avitum Ag | Interface für ein medizinisches Gerät mit einem adaptiven Betätigungssensor |
US11592387B2 (en) * | 2020-02-02 | 2023-02-28 | The Boeing Company | Test fixture and method for use |
Citations (1)
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AT505166A4 (de) * | 2008-01-16 | 2008-11-15 | Austria Tech & System Tech | Verfahren und vorrichtung zum erzeugen eines licht-wellenleiters in einem leiterplattenelement |
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US5292620A (en) | 1988-01-15 | 1994-03-08 | E. I. Du Pont De Nemours And Company | Optical waveguide devices, elements for making the devices and methods of making the devices and elements |
US4827121A (en) * | 1988-02-24 | 1989-05-02 | Measurex Corporation | System for detecting chemical changes in materials by embedding in materials an unclad fiber optic sensor section |
EP0725269A3 (de) | 1995-02-03 | 1997-12-17 | Motorola, Inc. | Optischer Sensor und Verfahren dafür |
US6690845B1 (en) | 1998-10-09 | 2004-02-10 | Fujitsu Limited | Three-dimensional opto-electronic modules with electrical and optical interconnections and methods for making |
AT406711B (de) | 1999-02-25 | 2000-08-25 | Joanneum Research Forschungsge | Verfahren zur spektroskopischen bestimmung der konzentration von alkoholen mit 1 bis 5 kohlenstoffatomen |
US7175811B2 (en) | 2000-04-28 | 2007-02-13 | Edgelight Biosciences | Micro-array evanescent wave fluorescence detection device |
EP1307728B1 (de) * | 2000-08-09 | 2010-03-10 | Artificial Sensing Instruments ASI AG | Wellenleitergitterstruktur und optische messanordnung |
AT503858B1 (de) | 2003-06-05 | 2008-08-15 | Lannacher Heilmittel | Verfahren zur herstellung einer festen oralen pharmazeutischen zusammensetzung, enthaltend ein jodsalz |
DE10350526A1 (de) | 2003-10-29 | 2005-06-09 | Bayer Technology Services Gmbh | Schichtstruktur und optischer Wellenleiter-Sensor basierend auf photoadressierbaren Polymeren |
AT413891B (de) | 2003-12-29 | 2006-07-15 | Austria Tech & System Tech | Leiterplattenelement mit wenigstens einem licht-wellenleiter sowie verfahren zur herstellung eines solchen leiterplattenelements |
DE102005021008B4 (de) | 2004-05-04 | 2011-06-16 | Leoni Ag | Optischer Schalter oder Taster |
US7285420B2 (en) * | 2004-11-18 | 2007-10-23 | Corning Incorporated | System and method for self-referencing a sensor in a micron-sized deep flow chamber |
AT503585B1 (de) | 2006-05-08 | 2007-11-15 | Austria Tech & System Tech | Leiterplattenelement sowie verfahren zu dessen herstellung |
-
2010
- 2010-10-14 AT AT0063510U patent/AT12382U1/de not_active IP Right Cessation
-
2011
- 2011-10-14 EP EP11776316.9A patent/EP2627991A1/de not_active Withdrawn
- 2011-10-14 WO PCT/AT2011/000428 patent/WO2012048359A1/de active Application Filing
- 2011-10-14 US US13/879,260 patent/US20130202488A1/en not_active Abandoned
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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AT505166A4 (de) * | 2008-01-16 | 2008-11-15 | Austria Tech & System Tech | Verfahren und vorrichtung zum erzeugen eines licht-wellenleiters in einem leiterplattenelement |
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US20130202488A1 (en) | 2013-08-08 |
WO2012048359A1 (de) | 2012-04-19 |
AT12382U1 (de) | 2012-04-15 |
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