TW201543309A - Position sensor - Google Patents

Abstract

This invention provides a position sensor whereby even if forceful contact exhibiting a load of 13 N is applied to an optical waveguide, cores in said optical waveguide and an under-cladding layer do not undergo plastic deformation but rather quickly return to the original shapes thereof. Said position sensor comprises the following: a quadrangular sheet-shaped optical waveguide in which a lattice of cores is supported by a quadrangular sheet-shaped under-cladding layer and covered by an over-cladding layer; a light-emitting element connected to one end face of each linear core constituting the lattice of cores; and a light-receiving element connected to the other end face of each linear core. The cores are set so as to have an elastic region over the tensile-elongation range from 3% to 10%, and the under-cladding layer is set so as to have an elastic region over the tensile-elongation range from 5% to 140%.

Description

Position sensor Field of invention

The present invention relates to a position sensor for optically detecting a pressing position.

Background of the invention

Heretofore, a scheme of a position sensor that optically detects a pressing position has been proposed (see, for example, Patent Document 1). The sensor is formed such that a plurality of linear core members that are optical paths are disposed in the longitudinal and lateral directions, and the peripheral portion of the core material is covered with a clad to form a sheet. The optical waveguide is shaped such that light from the light-emitting element is incident on one end surface of each of the core materials, and light propagating in each core material is detected by the light-receiving element on the other end surface of each core material. Further, when a part of the surface of the optical waveguide is pressed by the pen tip or the like corresponding to the longitudinal and lateral arrangement portions of the core material, the pressing portion is recessed in the pressing direction to flatten the core material (the cross-sectional area of the core material in the pressing direction) When the core material of the pressing portion is lowered, the detection level of the light on the light receiving element is lowered, whereby the vertical and horizontal positions (coordinates) of the pressing portion can be detected.

Prior technical literature Patent literature

Patent Document 1: Japanese Patent Laid-Open No. Hei 8-234895

Summary of invention

However, by the deformation of the core material, even if the pressing position can be detected, if the core material is not restored to the original shape after the pressing is released, the light propagation in the core material cannot be restored to the original state. With the status, it is impossible to prepare for the next press. The conventional position sensor described above has a problem that the core material or the lower cladding layer is plastically deformed by strong pressing (for example, a load of 13 N), and the original shape cannot be restored even if the pressing is released.

The present invention has been made in view of such circumstances, and an object thereof is to provide a position sensor which is formed such that a core material and a lower cladding layer of an optical waveguide do not apply even if a strong pressing force of a load of 13 N is applied to an optical waveguide. It is plastically deformed and can quickly return to its original shape after the pressing is released.

In order to achieve the above object, a position sensor according to the present invention is a position sensor including an optical waveguide, a light-emitting element, and a light-receiving element, and the optical waveguide has a plurality of linear core materials formed in a lattice shape and formed in a lattice shape. a lower cladding layer supporting the core material and an upper cladding layer covering the core material, wherein the light emitting element is connected to one end surface of the core material of the optical waveguide, and the light receiving element is connected to the core material A light-receiving element which is light-receiving element which is emitted from the light-emitting element and passes through the core material on one end surface, and has a configuration in which the core material is set to an elastic range in which the tensile elongation is in the range of 3 to 10%. And setting the lower cladding layer supporting the core material to an elastic range in which the tensile elongation is in the range of 5 to 140%, and forming the surface portion of the optical waveguide corresponding to the lattice-shaped core portion as an input And determining, by the pressing, the attenuation of the received light intensity on the light receiving element to determine the pressed portion in the input region.

The inventors of the present invention are coated with a lattice-shaped core material On the position sensor of the layer-supported sheet-shaped optical waveguide, when the pressing of the optical waveguide is released, in order to quickly return the core material and the lower cladding layer of the optical waveguide to the original shape, the focus is placed The tensile elongation of the above-mentioned core material and the lower cladding layer was repeatedly studied. As a result, it was found that when the core material was set to an elastic range in which the tensile elongation was in the range of 3 to 10%, and the lower cladding layer was set to have an elastic elongation in the range of 5 to 140%. Even if a strong pressing force of a load of 13N is applied to the optical waveguide, the core material and the lower cladding layer of the optical waveguide are not plastically deformed, and when the pressing is released, the original shape is quickly restored, thereby achieving the present. invention.

That is, in the optical waveguide, since the core material is subjected to the lower cladding layer The state of the support is formed, so when the lower cladding layer is deformed, the core material is also deformed, so even if the core material is returned to the original shape, it is not enough, but not only the core material, but the lower cladding layer. Must also return to the original shape. Therefore, in the present invention, the core material and the lower cladding layer are defined as described above so that the core material and the lower cladding layer are quickly restored. Further, although the upper cladding layer is formed on the lower cladding layer in a state of covering the core material, as long as the core material and the lower cladding layer return to the original shape, the light propagation in the core material is restored. To the original state, therefore, even if it is assumed to be on the package The coating remains in the deformed state as it is, and the next press can still be prepared.

The position sensor of the present invention has a sheet-like optical waveguide in which a lattice-shaped core material is supported by a lower cladding layer, and the core material is set to have an elastic range in which the tensile elongation is in the range of 3 to 10%, and The lower cladding layer is set to have a tensile elongation in the range of 5 to 140%. Therefore, even if a strong press of the load 13N is applied to the optical waveguide, the core material and the lower cladding layer of the optical waveguide are not deformed, and the shape can be quickly restored to the original shape after the pressing is released. That is, the position sensor of the present invention can be quickly prepared for the next pressing, and is excellent in continuous detection of the pressing position.

In particular, in the case where the core material and the lower cladding layer are made of an epoxy resin, the core material and the lower cladding layer can be easily set in the elastic range in the range of the tensile elongation. .

Further, when the upper cladding layer is set to have an elastic elongation in the range of 5 to 140%, even if a strong pressing force of 13 N is applied to the optical waveguide, the upper cladding layer does not undergo plastic deformation, and When the pressing is released, the original shape is quickly restored. Therefore, when the above pressing is released, the pressing trace can quickly disappear from the surface of the optical waveguide (the surface of the upper cladding layer).

1‧‧‧Under cladding

2‧‧‧ core material

2a‧‧‧ wall

3‧‧‧Upper coating

4‧‧‧Lighting elements

5‧‧‧Light-receiving components

10a‧‧‧ nib

30‧‧‧Table

W‧‧‧ optical waveguide

G‧‧‧ gap

‧‧‧Width

Fig. 1 is a view schematically showing a first embodiment of a position sensor according to the present invention, wherein (a) is a plan view and (b) is an enlarged cross-sectional view thereof.

Figure 2 is a cross-sectional view schematically showing the state of use of the above position sensor In the figure, (a) is a pressed state, and (b) is a state in which the pressing has been released.

3(a) to 3(d) are explanatory views schematically showing a method of manufacturing an optical waveguide.

Fig. 4 is an enlarged cross-sectional view schematically showing a second embodiment of the position sensor of the present invention.

5(a) to 5(f) are enlarged plan views schematically showing a cross-sectional form of a lattice-shaped core material of the position sensor.

FIGS. 6(a) and 6(b) are enlarged plan views schematically showing a path of travel of light in an intersection portion of the lattice-shaped core material.

Form for implementing the invention

Next, an embodiment of the present invention will be described in detail based on the drawings.

Fig. 1(a) is a plan view showing a first embodiment of a position sensor according to the present invention, and Fig. 1(b) is an enlarged cross-sectional view showing a central portion thereof. The position sensor of this embodiment is provided with a rectangular-shaped sheet-shaped optical waveguide W that supports the lattice-shaped core material 2 in the rectangular-plate-shaped lower cladding layer 1 and is covered by the upper cladding layer 3, and is connected to the configuration. The light-emitting element 4 on one end surface of the linear core material 2 of the lattice-shaped core material 2 and the light-receiving element 5 connected to the other end surface of the linear core material 2 are provided. Further, the core material 2 is in the elastic range in a range of tensile elongation of 3 to 10%, and the lower cladding layer 1 is in the elastic range in a range of tensile elongation of 5 to 140%. Further, in this embodiment, the upper cladding layer 3 is also in the elastic range in the range of the tensile elongation of 5 to 140%, similarly to the lower cladding layer 1.

Further, light emitted from the light-emitting element 4 is formed to pass through the core member 2 and is received by the light-receiving element 5. And, right The surface portion of the upper cladding layer 3 which is part of the lattice-shaped core material 2 serves as an input region. In addition, in FIG. 1(a), the core material 2 is shown by a broken line, and the thickness of the core material 2 is shown by the thickness of a broken line. Further, in Fig. 1(a), the number of core materials 2 is reduced and shown. Further, the arrow of Fig. 1(a) indicates the direction in which light travels.

As described above, the core material 2 having the lattice shape is covered by the lower cladding layer 1 And a position sensor of the sheet-like optical waveguide W sandwiched by the upper cladding layer 3, wherein the core material 2 is placed in an elastic range of a tensile elongation of 3 to 10%, and the lower cladding layer 1 is located The practice in the elastic range of the tensile elongation in the range of 5 to 140% is a significant feature of the present invention. By having such an optical waveguide W, even if a strong pressing load of 13 N is applied to the portion of the input region, the core member 2 and the lower cladding layer 1 can be deformed while maintaining the elasticity, and after the pressing is released, That is, by its own resilience, it quickly returns to its original shape. From the viewpoint of the shape recovery property, it is preferable that the core material 2 is in the elastic range in a range of from 5 to 10% of the tensile elongation, and the lower cladding layer 1 is made to have a tensile elongation of 15 The range of ~100% is in the elastic range. Further, in this embodiment, since the upper cladding layer 3 is also in the elastic range in the range of the tensile elongation of 5 to 140% similarly to the lower cladding layer 1, the pressing trace is released when the pressing is released. It can quickly disappear from the surface of the optical waveguide W (the surface of the upper cladding layer 3).

That is, the detection of the pressing position of the above position sensor is an example. As shown in the cross-sectional view of Fig. 2 (a), the position sensor is placed in a state in which the back surface of the lower cladding layer 1 is placed on the surface of a hard object such as the table 30, and is pressed by the pen tip 10a or the like. When the portion of the input area of the cladding layer 3 is covered, it can be detected The pressing position. At this time, as described above, the core material 2 and the lower cladding layer 1 are recessed in a state of maintaining elasticity by the specific elastic range of the core material 2, the lower cladding layer 1, and the upper cladding layer 3. Then, as shown in the cross-sectional view of Fig. 2(b), when the pressing is released, as described above, the specific elastic range of the core material 2, the lower cladding layer 1, and the upper cladding layer 3 can be made. Since the optical waveguide W quickly returns to the original flat shape, the position sensor is a sensor that can quickly prepare for the next pressing and is excellent in continuous detection of the pressing position. Further, the detection of the pressing position may be performed on the surface of the input region via a resin film, paper, or the like.

It can be used as the core material 2 having the characteristics as described above, and the lower cladding layer 1 The material for forming the upper cladding layer 3 is, for example, an epoxy resin or the like from the viewpoint of ease of setting the elastic range. Further, from the viewpoint of easiness of production of the optical waveguide W, the epoxy resin or the like is preferably a photosensitive resin. The refractive index of the core material 2 is set to be larger than the refractive indices of the lower cladding layer 1 and the upper cladding layer 3. The adjustment of the refractive index can be performed, for example, by adjusting the selection and composition ratio of the kind of each of the formed materials.

Moreover, the optical waveguide W of this embodiment is formed in a sheet shape. The surface of the lower cladding layer 1 is partially embedded with a lattice-shaped core material 2, and the surface of the lower cladding layer 1 is formed on the same plane as the top surface of the core material 2, and the lower cladding layer 1 is coated. The surface of the core material 2 and the apex of the core material 2 form a sheet-like upper cladding layer 3. In the optical waveguide W of such a configuration, since the upper cladding layer 3 can be formed to have a uniform thickness, the pressing position in the input region can be easily detected. The thickness of each layer can be set, for example, to the lower cladding layer 1 in the range of 10 to 500 μm, and the core material 2 to be in the range of 5 to 100 μm. Layer 3 is in the range of 1 to 200 μm.

Moreover, the elastic modulus of the core material 2 is preferably set to be under cladding. The elastic modulus of the layer 1 and the upper cladding layer 3 is equal to or higher. The reason for this is because when the setting of the modulus of elasticity is reversed, the area of the core 2 is hardened, and the area of the pen tip or the like which is pressed against the portion of the input region of the upper cladding layer 3 is larger. The partial depression of the optical waveguide W tends to make it difficult to accurately detect the pressing position. Therefore, as for each elastic modulus, for example, the elastic modulus of the core material 2 is set to be in the range of 1 to 10 GPa, and the elastic modulus of the upper cladding layer 3 is set to be in the range of 0.1 to 10 GPa. The modulus of elasticity of the coating layer 1 is set in the range of 0.1 to 1 GPa. At this time, since the elastic modulus of the core material 2 is large, the core material 2 is not crushed under a small pressing force (the sectional area of the core material 2 does not become small), but since it is pressed, The core material 2 is recessed in such a manner as to sink to the lower cladding layer 1 [refer to FIG. 2(a)], so light leakage (scattering) occurs from the bent portion of the core material 2 corresponding to the depressed portion, and the core is In the material 2, the detection position of the light receiving element 5 (see FIG. 1(a)) is lowered, and the pressing position can be detected.

Next, one example of the method of manufacturing the optical waveguide W described above is performed. Description. First, as shown in FIG. 3(a), the upper cladding layer 3 is formed into a sheet shape having a uniform thickness. Next, as shown in FIG. 3(b), the upper surface of the upper cladding layer 3 is formed into a predetermined pattern in a state in which the core material 2 is protruded. Next, as shown in FIG. 3(c), the lower cladding layer 1 is formed on the upper surface of the upper cladding layer 3 so as to cover the core material 2. Then, as shown in FIG. 3(d), the obtained structure is turned upside down, the lower cladding layer 1 is set to the lower side, and the upper cladding layer 3 is set to the upper side. By doing this, the optical waveguide W described above can be obtained. Furthermore, the above The cladding layer 1, the core material 2, and the upper cladding layer 3 are all produced by a method of producing a material corresponding to each.

Figure 4 is a view showing a second embodiment of the position sensor of the present invention; A magnified view of the section at the center. In this embodiment, the structure of the optical waveguide W is formed upside down with the first embodiment shown in Fig. 1(b). In other words, it is formed in a structure in which a predetermined pattern is formed in a state in which the core material 2 is protruded on the surface of the sheet-like lower cladding layer 1 having a uniform thickness, and in a state in which the core material 2 is coated, An upper cladding layer 3 is formed on the surface of the lower cladding layer 1. The other portions are the same as in the first embodiment shown in Fig. 1(b), and the same portions are denoted by the same reference numerals. Further, the position sensor of this embodiment can also have the same operations and effects as those of the first embodiment shown in Fig. 1(b).

Furthermore, in each of the above embodiments, the lattice-shaped core Each of the intersecting portions of the material 2 is generally in a state in which all of the four intersecting directions are continuous as shown in an enlarged plan view of Fig. 5(a), but may be other forms. For example, as shown in FIG. 5(b), only one direction of intersection may be cut by the gap G, and may be discontinuous. The gap G is formed by the following cladding layer 1 or a material for forming the upper cladding layer 3. The width d of the gap G is set to exceed 0 (as long as the gap G is formed), and is usually 20 μm or less. Similarly, as shown in FIGS. 5(c) and (d), the two directions intersecting may be shown [Fig. 5(c) is the two directions facing each other, and Fig. 5(d) is the adjacent two. The directions are formed in a discontinuous form, and as shown in FIG. 5(e), the three directions of the intersection may be formed into a discontinuous form, and may also be crossed as shown in FIG. 5(f). All directions are formed in a discontinuous form. In addition, It is also possible to form a lattice shape in which two or more of the intersection portions shown in FIGS. 5( a ) to 5 ( f ) are provided. In other words, in the present invention, the "lattice shape" formed by a plurality of linear core materials 2 means a form in which a part or all of the intersection portions are formed as described above.

In particular, when shown in Figures 5(b) to (f), at least When one direction is made discontinuous, the cross loss of light can be reduced. That is, as shown in FIG. 6(a), when the attention is placed in one direction of the intersection (in the upward direction of FIG. 6(a)] at the intersections where all of the four intersecting directions are continuous. Then, a part of the light incident on the intersection portion reaches the wall surface 2a of the core material 2 which is orthogonal to the core material 2 from which the light advances, and the reflection angle on the wall surface is large, so that the core material 2 is penetrated [ Refer to the arrow of the two-dot chain line of Fig. 6(a). The penetration of light like this also occurs in the direction of the opposite side to the above (in the downward direction in Fig. 6(a)]. On the other hand, as shown in FIG. 6( b ), if one of the intersecting directions (the upward direction in FIG. 6( b )) is discontinuous by the gap G, the gap G and the core material 2 are formed. Interface, and the portion of the light penetrating the core material 2 in Fig. 6(a) will have a smaller angle of reflection at the above interface, so there will be no penetration, and will be reflected at the interface, and continue Advancing in the core material 2 [refer to the arrow of the two-dot chain line of Fig. 6 (b)]. Accordingly, as described earlier, when at least one of the intersecting directions is made discontinuous, the cross loss of light can be reduced.

Moreover, in each of the above embodiments, the upper cladding layer 3 is also Similarly to the lower cladding layer 1, the tensile elongation is in the range of 5 to 140% in the elastic range, but the upper cladding layer 3 may be a layer showing other elastic properties.

Further, in the above respective embodiments, in the lower cladding layer 1 On the lower surface, an elastic layer such as a rubber layer may be provided. At this time, after the pressing is released, the lower cladding layer 1, the core material 2, and the upper cladding layer 3 can return to the original shape by using not only the restoring force of the elastic layer but also the elastic force of the elastic layer. Further, the lower cladding layer 1 may be formed of a layer formed of the same material as the above-described elastic layer, and the laminate body composed of the lower cladding layer 1 and the elastic layer may be handled as one layer.

Next, an embodiment will be described together with a comparative example. However, the invention is not limited to the embodiments.

Sudden application

[Forming material of core material, lower cladding layer and upper cladding layer]

As shown in Table 1 to be described later, four kinds of epoxy resins for forming a core material were prepared, and three kinds of epoxy resins for forming a coating layer (lower cladding layer and upper cladding layer) were prepared. Then, using at least one of these epoxy resins, a material for forming the core material and the cladding layer to be used in Examples 1 to 5 and Comparative Examples 1 to 3, respectively, was prepared. In the preparation, a photoacid generator, ethyl lactate (solvent) or the like is suitably used.

[Tensile Elongation of Core Material and Coating Layer]

A plate-shaped test piece [0.5 mm × 20 mm × 0.05 mm (thickness)] of a core material and a coating layer was produced using each of the above-mentioned forming materials. Then, the tensile elongation of each test piece was measured using a tensile compression tester (TECHNO GRAPH TG-1kN). The results are shown in Table 1 which will be described later.

[Production of optical waveguide]

First, on the surface of a glass substrate, the shape of the above coating layer is used. The material is formed into an upper cladding layer by spin coating. The upper cladding layer had a thickness of 25 μm.

Next, on the surface of the upper cladding layer, the above core material is used. The forming material is formed into a lattice-shaped core material by photolithography. This core material has a width of 30 μm and a thickness of 50 μm. Furthermore, it is impossible to form a core material by using a material having a tensile elongation of more than 10%.

Next, the upper cladding layer is coated on the core material On the upper surface, a lower cladding layer is formed by a spin coating method using the above-described under cladding layer forming material. The thickness of this lower cladding layer was 500 μm.

Then, the upper cladding layer is peeled off from the glass substrate. Next, the lower cladding layer is adhered to the surface of the aluminum plate through an adhesive. By doing this, an optical waveguide can be formed through the adhesive on the surface of the aluminum plate.

[Production of position sensor]

A light-emitting element (XH85-S0603-2s, manufactured by Optowell Co., Ltd.) was connected to one end surface of the core material of the optical waveguide, and a light-receiving element was connected to the other end surface of the core material (manufactured by Hamamatsu Photonics Co., Ltd.). , s10226), to fabricate the position sensors of Examples 1 to 5 and Comparative Examples 1 to 3.

[Evaluation of position sensor: continuous detection (shape recovery)]

Paper (thickness: 80 μm) was placed on the surface of the input region of each of the position sensors described above via a PET film (thickness: 50 μm). Then, the receiving spectrum was observed by the above-mentioned light receiving element in a state where no load was applied to the surface of the paper. Next, on the surface of the above paper, a nib tip with a front end diameter of 0.5 mm A load of 9.8 N was applied, and the reception spectrum was observed with the above-mentioned light receiving element. Next, after the load of the above-mentioned atomic pen tip is released, the time at which the above-mentioned received spectrum returns to the reception spectrum in the no-load state is measured. Then, when the recovery time is less than 7.1 ms (CMOS scanning speed), it is evaluated that the position sensor is excellent in continuous detection (shape recovery) and draws ○, and the recovery time is 7.1 ms or more, and is evaluated as position sensing. The continuous detection (shape recovery) of the device was poor and plotted as ×, which is shown in Table 1 below. Further, in Comparative Examples 1 to 3, by applying the above-described load, a shape deformation occurred, and even if the load was released, the shape did not return.

[Evaluation of position sensor: elastic maintenance]

Paper (thickness: 80 μm) was placed on the surface of the input region of each of the position sensors described above via a PET film (thickness: 50 μm). Then, at a position on the surface of the paper, a load of 9.8 N was applied for 30 times with a tip of 0.5 mm at the tip end diameter (loading for one second each time), and then an optical microscope (manufactured by KEYENCE Co., Ltd., WH-Z75) Observe the surface portion after the load has been applied. Then, when there was no trace on the surface, it was evaluated that the elasticity retention property was excellent and ○ was marked, and the load on the surface was evaluated as a poor elasticity maintainability and plotted as ×, which is shown in Table 1 below.

[Table 1]

. EHPE3150: Made by DAICEL

. YL7410, Epikote1007: Mitsubishi Chemical Corporation

. KI-3000-4: Nippon Steel Chemical Co., Ltd.

. EP4080E: made by ADEKA

As can be seen from the results of the above Table 1, the position sensors of Examples 1 to 5 were in continuous detection (shape recovery) and elastic maintenance when compared with the position sensors of Comparative Examples 1 to 3. Both are excellent. It can also be seen that the difference in results is dependent on the tensile elongation in the elastic range of the core material and the coating layer.

Further, in the above-described Examples 1 to 5, even if the elastic properties of the upper cladding layer were changed, the evaluation results of the continuous detection (shape recovery property) which showed the same tendency as the above-described Examples 1 to 5 were obtained. According to this, the review The valence result is dependent on the tensile elongation in the elastic range of the core material and the lower cladding layer.

Further, in the above embodiments 1 to 5, although in position sensing The surface of the input region of the device was evaluated for continuous detection (shape recovery) and elastic maintenance in a state in which the paper was placed on the PET film, but even in the state where the PET film and the paper were not placed, The evaluation results showing the same tendency as the above-described Examples 1 to 5 can be obtained.

Further, in the above embodiments 1 to 5, although the optical waveguide is made into a picture Although the form shown in the cross-sectional view of Fig. 1(b) is obtained, even if the optical waveguide is formed in the form shown in the cross-sectional view of Fig. 4, evaluation results similar to those of the above-described first to fifth embodiments can be obtained.

In the above embodiment, although the specific form of the present invention is shown The above embodiments are merely illustrative and are not to be construed as limiting. Various modifications that are obvious to those skilled in the art to which the invention pertains are also considered to be within the scope of the invention.

Industrial availability

The position sensor of the present invention can be applied to a case where the pressing trace is quickly disappeared and the continuous detection is performed satisfactorily when the pressing position is detected.

1‧‧‧Under cladding

2‧‧‧ core material

3‧‧‧Upper coating

4‧‧‧Lighting elements

5‧‧‧Light-receiving components

W‧‧‧ optical waveguide

Claims (3)

A position sensor is a position sensor including an optical waveguide, a light-emitting element, and a light-receiving element, and the optical waveguide has a plurality of linear core materials formed in a lattice shape and supports the core material. a coating layer and an upper cladding layer covering the core material, wherein the light-emitting element is connected to one end surface of the core material of the optical waveguide, and the light-receiving element is connected to the other end surface of the core material and is from the above a light-receiving element that emits light that passes through the core material and that passes through the core material. The position sensor is characterized in that the core material is set to an elastic range in which the tensile elongation is in the range of 3 to 10%, and the core is supported. The lower cladding layer of the material is set to have an elastic range in which the tensile elongation is in the range of 5 to 140%, and the surface portion of the optical waveguide corresponding to the lattice-shaped core portion is formed as an input region, and by the pressing The attenuation of the received light intensity on the light-receiving element is determined to determine the pressed portion in the input region. The position sensor of claim 1, wherein the core material and the lower cladding layer are made of epoxy resin. The position sensor of claim 1 or 2, wherein the upper cladding layer is set to have an elastic range in which the tensile elongation is in the range of 5 to 140%.