JP2016141471A - Optical component package - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical component package which enables improvement of protection performance of an optical function surface when a protection film is peeled.SOLUTION: An optical component package includes: an optical component 11 having an optical function surface 11S1 on which an optical structure 11A1 is formed; and a protection film 12 adhering to the optical structure 11A1 and bonded to the optical component 11. The optical component 11 includes a rear surface 11S2 that is a surface opposite to the optical function surface 11S1. The protection film 12 is bonded to the rear surface 11S2. Adhesive strength between the rear surface 11S2 and the protection film 12 is higher than adhesive strength between the optical structure 11A1 and the protection film 12.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an optical component package including an optical component having an optical functional surface and a protective film for protecting the optical functional surface.

  In the optical component provided in the optical component packaging body described above, the concavo-convex portion in which the fine concavo-convex structure is formed and the non-concavo-convex portion in which the fine concavo-convex structure is not formed are one when viewed from the direction facing the fine concavo-convex structure. Located on the optical function surface. The protective film provided in the optical component package covers the fine concavo-convex structure and is attached to the non-concave part (see, for example, Patent Documents 1 to 3). The protective film adhered to the non-concave portion is required to be easily peeled off when the optical component is used, while it is not peeled off when the optical component package is transported or stored. In order to respond to the demand for such a protective film, a technique has been proposed in which the adhesive strength of the protective film to the concavo-convex portion is set smaller than the adhesive strength of the protective film to the non-concave portion in the optical component package.

JP 2010-107858 A JP 2010-120348 A JP 2013-130895 A

However, on one surface of the optical component, since the uneven portion and the non-recessed portion are adjacent to each other, when the protective film is peeled off from the non-recessed portion, the user's finger or the like holding the protective film touches the unevenness. In some cases, the optical function of the uneven portion may be lowered. Therefore, in the optical component package described above, it is desired to improve the protection of the optical functional surface when the protective film is peeled off.
An object of the present invention is to provide an optical component package that can enhance the protection of the optical functional surface when the protective film is peeled off.

  In order to solve the above problems, an optical component package includes a plate-like optical component having an optical functional surface on which an optical structure is formed, and a protective film in contact with the optical functional surface. And the said optical component is provided with the to-be-adhered surface which is a surface located on the opposite side to the said optical function surface, The said protective film is affixed on the said to-be-adhered surface, The said to-be-adhered surface and the said The strength of contact with the protective film is higher than the strength of contact between the optical functional surface and the protective film.

In order to solve the above problems, an optical component package includes a plate-like optical component having an optical functional surface on which an optical structure is formed, and a protective film in contact with the optical functional surface. The optical component includes a back surface that is a surface located on the side opposite to the optical function surface, and a side surface that is a surface that connects the optical function surface and the back surface, and the at least one of the back surface and the side surface. Is the adherend surface. And the said protective film is affixed on the said to-be-adhered surface, and the intensity | strength which the said to-be-adhered surface and the said protective film contact | adhere is higher than the intensity | strength which the said optical function surface and the said protective film contact | adhere.
In the optical component package, the surface to be adhered may be the side surface.

In order to solve the above problems, an optical component package includes a plate-like optical component having an optical functional surface on which an optical structure is formed, and a protective film in contact with the optical functional surface. The optical component includes a back surface that is a surface located on the side opposite to the optical function surface, and the protective film includes an overlapping portion that overlaps the back surface. And the intensity | strength which the said protective films adhere in the said superimposition part is higher than the intensity | strength which the said optical function surface and the said protective film adhere.
In the optical component package, it is preferable that the tensile elastic modulus of the optical component is 0.3 GPa or more.
In the optical component package, the tensile modulus of the optical component is preferably 1.0 GPa or more.
In the optical component package, the period in which the irregularities are repeated in the optical structure may be equal to or less than the wavelength of light in the usage environment of the optical component.
In the optical component package, the optical structure may have an antireflection function.

  According to the optical component package of the present invention, the protection of the optical functional surface at the time of peeling of the protective film is enhanced.

FIG. 1 is a perspective view showing a perspective structure of an optical component package in an embodiment embodying the optical component package of the present invention. FIG. 2 is a cross-sectional view showing a cross-sectional structure of the optical component package of the first modification. FIG. 3 is a cross-sectional view showing a cross-sectional structure of an optical component packaging body according to a second modification. FIG. 4 is a cross-sectional view showing a cross-sectional structure of an optical component packaging body according to a third modification. FIG. 5 is a cross-sectional view showing a cross-sectional structure of an optical component packaging body according to a fourth modification. FIG. 6 is a cross-sectional view showing a cross-sectional structure of an optical component package according to a fifth modification. FIG. 7 is a cross-sectional view showing a cross-sectional structure of an optical component packaging body according to a sixth modified example.

The optical component package in one embodiment will be described with reference to FIG.
As shown in FIG. 1, the optical component package includes an optical component 11 and a protective film 12 for protecting the optical component 11. The optical component 11 has a rectangular plate shape, and includes an optical functional surface 11S1 and a back surface 11S2 that is a surface opposite to the optical functional surface 11S1.

  The optical functional surface 11S1 has an optical structure 11A1 that is a fine uneven structure in a rectangular area with dots in FIG. 1, and the periphery of the optical structure 11A1 is a flat part 11A2 that is an area where no unevenness is formed. It is. The optical component 11 further includes a side surface 11S3 that is a plane connecting the optical functional surface 11S1 and the back surface 11S2. The side surface 11S3 of the optical component 11 includes two sets of two planes facing each other.

  The protective film 12 includes a covering portion 12A that faces the optical functional surface 11S1, and the covering portion 12A is in contact with the tip of the convex portion that constitutes the optical structure 11A1, and is in contact with the flat portion 11A2. The protective film 12 is bent from the edge of the optical functional surface 11S1 along a set of planes on the side surface 11S3, and further bent from the edge of the side surface 11S3 along the back surface 11S2.

  The protective film 12 includes two sticking end portions 12B facing the back surface 11S2, and the surface facing the back surface 11S2 in each of the two sticking end portions 12B is against the back surface 11S2 which is an example of a sticking surface. An adhesive layer 12T having adhesiveness is provided. Each of the two adhesive layers 12T is attached to the sticking end portion 12B and the back surface 11S2, and the strength of adhesion between the protective film 12 and the back surface 11S2 is greater than the strength of adhesion between the protective film 12 and the optical function surface 11S1. Also raise. Thereby, the protective film 12 is positioned with respect to the optical component 11.

  The optical function surface 11S1 is a surface that expresses an optical function by the optical structure 11A1. Examples of the optical function exhibited by the optical structure 11A1 include at least one of an antireflection function that suppresses reflection of light, a scattering function that scatters light, and a diffraction function that diffracts light.

  The optical structure 11A1 may be, for example, a periodic structure in which a plurality of convex portions or a plurality of concave portions are periodically repeated, or a plurality of convex portions or a plurality of concave portions are arranged in a disorderly manner. It may be a body. The periodic structure is, for example, a Moseye (registered trademark) structure or a plasmonic structure.

  The convex part with which optical structure 11A1 is provided is a cone shape, a pyramid shape, a linear protrusion, and a lattice protrusion, for example. The recesses included in the optical structure 11A1 are, for example, a conical hole, a pyramidal hole, a linear groove, and a lattice-shaped groove.

  In the optical structure 11A1 having the antireflection function, the average interval between the convex portions or the average interval between the concave portions is, for example, equal to or less than the wavelength of light in the use environment of the optical component 11. For example, when the object of antireflection is visible light, the average interval between the convex portions or the average interval between the concave portions is equal to or less than the wavelength of visible light. With the optical structure 11A1 having such a structure, an effective reflection suppressing function due to a continuous increase in the refractive index from the refractive index of air to the refractive index of the material constituting the optical component 11 is exhibited. In the optical structure 11A1, the average interval between the convex portions is preferably several μm or less, more preferably 550 nm or less, and further preferably 300 nm or less.

  The average interval between the convex portions in the optical structure 11A1, the average interval between the concave portions in the optical structure 11A1, and the arrangement of the convex portions or the concave portions in the optical structure 11A1 are determined based on, for example, a Fourier transform image. A Fourier transform image is obtained from an original image, which is a two-dimensional image of the optical functional surface 11S1, through a two-dimensional fast Fourier transform. The original image of the optical function surface 11S1 is an image obtained from a plan view that faces the optical function surface 11S1, and is an image that indicates the size of the step in terms of luminance in the two-dimensional coordinate system in which the optical function surface 11S1 extends. . The original image, which is a two-dimensional image of the optical functional surface 11S1, is obtained by, for example, measurement using an atomic force microscope, measurement using a scanning electron microscope, or measurement using a contact step meter in a plan view facing the optical functional surface 11S1. It is done.

  The original image used for the above-described image processing indicates a rectangular portion that is arbitrarily selected and is a part of the optical functional surface 11S1. According to the waveform separation of the original image using the fast Fourier transform, a Fourier transform image based on the original image is obtained, and the distance between the zeroth order peak and the first order peak in the Fourier transform image is obtained. The reciprocal of the distance between the zeroth-order peak and the first-order peak is treated as the average interval between the convex portions or the average interval between the concave portions in one rectangular portion.

  The optical component 11 is a component having a plate shape, the thickness of the optical component 11 is, for example, 0.5 mm or more and 5 mm or less, and the tensile elastic modulus of the optical component 11 is, for example, 0.3 GPa or more. More preferably, it is 1.0 GPa or more. Note that the thickness of the optical component 11 and the tensile modulus of elasticity of the optical component 11 are in a range where the optical component 11 is not mechanically deformed by the attachment of the protective film 12, and the adhesion of the protective film 12 is maintained. It is appropriately selected from the range of dripping.

  The thickness which the protective film 12 has is 1 micrometer or more and 0.1 mm or less, for example. The thickness of the protective film 12 and the tensile elastic modulus of the protective film 12 are appropriately selected from the range in which the optical component 11 is not mechanically deformed and the protective film 12 is kept attached. Selected. The thickness of the adhesive layer is, for example, 1 μm or more and 50 μm or less.

  The material for forming the optical component 11 is not particularly limited as long as it is a material that exhibits an optical function in the optical function surface 11S1. In the optical component 11 that is required to have a scattering function and a diffraction function, a material having a high light transmittance is preferable, and a material having a total light transmittance defined by JIS K 7361-1 of 85% or more is preferably used. High light-transmitting materials include polycarbonate resins, fluorine resins such as polytetrafluoroethylene and polychlorotrifluoroethylene, polyolefin resins including polyethylene resins, polypropylene resins and cyclopolyolefin resins, and polyvinyl chloride. Resin, polyester resin including polyethylene terephthalate resin and polyethylene terephthalate resin, polyvinyl alcohol resin, acrylic resin, styrene-acryl copolymer, styrene-acrylonitrile copolymer, urethane resin, epoxy resin, poly Examples thereof include resins such as ether sulfone resins and polysulfone resins, and glass.

  The material which forms the protective film 12 will not be specifically limited if it is a material which expresses the function which protects the optical function surface 11S1. Examples of the material for forming the protective film 12 include polyolefin resins including polyethylene resins, polypropylene resins and cyclopolyolefin resins, polyester resins including polyethylene terephthalate resins and polyethylene naphthalate resins, polycarbonate resins, Examples include polyvinyl alcohol resins, polyvinyl chloride resins, nylon resins, polystyrene resins, and polyacetyl acetate resins. The protective film 12 may contain a known anti-blocking agent such as silica, an antioxidant, a plasticizer, a lubricant, and an antistatic agent.

  Examples of the adhesive that forms the adhesive layer 12T include ethylene vinyl acetate copolymer resins, polyester resins, acetate resins, polyether sulfone resins, polycarbonate resins, polyamide resins, polyimide resins, and polyolefin resins. Resin and acrylic resin are mentioned. In addition, arbitrary components other than an adhesive may be contained in the adhesion layer 12T in the range which has a function which adhere | attaches the optical component 11 and the protective film 12. FIG.

As mentioned above, according to the said embodiment, the effect listed below is acquired.
(1) Since the strength at which the protective film 12 and the back surface 11S2 are in close contact with each other is higher than the strength at which the protective film 12 and the optical functional surface 11S1 are in close contact with each other, when the protective film 12 is peeled off from the back surface 11S2, two sticking ends Each of the parts 12B is peeled off from the back surface 11S2. At this time, the optical functional surface 11S1 is still protected by the protective film 12. Therefore, when the protective film 12 is peeled off, it is possible to prevent a user's finger or the like holding the protective film 12 from touching the optical structure 11A1 by mistake. As a result, the protection of the optical functional surface 11S1 when the protective film 12 is peeled is improved.

(2) Since the protective film 12 covering the optical functional surface 11S1 is folded from the optical functional surface 11S1 toward the back surface 11S2 and attached to the back surface 11S2, the optical component 11 exerts a tension in the direction in which the optical component 11 warps. Received from the protective film 12. In this respect, since the optical component 11 has a plate shape with a thickness, and the tensile elastic modulus of the optical component 11 is 0.3 GPa or more, distortion due to such tension is suppressed in the optical component 11. As a result, the protection of the optical function in the optical component 11 is enhanced, and a packaging form suitable for the optical component 11 having a plate shape can be provided.
(3) Since the tensile elastic modulus of the optical component 11 is 1.0 GPa or more, the effect according to the above (2) is further enhanced.

  (4) The average interval of the convex portions in the optical structure 11A1 is a period in which the concave and convex portions are repeated in the optical structure 11A1, and is equal to or less than the wavelength of light in the usage environment of the optical component package. Therefore, the optical component can suppress the reflection of light under the usage environment of the optical component package, and the protection of the optical functional surface 11S1 is enhanced against the optical component having such an optical function.

In addition, the said embodiment can be changed and implemented as follows.
[First Modification]
The adherend surface to which at least one of the two attachment end portions 12B is attached is not limited to the back surface 11S2 of the optical component 11, but may be the side surface 11S3 of the optical component 11, or the back surface 11S2 and the side surface 11S3 and both. Furthermore, the to-be-attached surface may differ for every sticking edge part 12B.

  In addition, the protective film 12 may include three sticking end portions 12B that are bent at one set of planes and another set of planes in the side surface 11S3 of the optical component 11, or two sets of planes. You may provide the four sticking edge parts 12B bent in each. At this time, the adherend surface to which at least one of the two or more attachment end portions 12B is attached is not limited to the back surface 11S2 of the optical component 11, but may be the side surface 11S3 of the optical component 11, Alternatively, both the back surface 11S2 and the side surface 11S3 may be used. And the to-be-attached surface may differ for every sticking end part 12B.

  For example, as FIG. 2 shows, the protective film 12 includes a covering portion 12A that covers the optical functional surface 11S1 of the optical component 11, and two sticking end portions 12B that cover a set of planes on the side surface 11S3 of the optical component 11. It has. The edge in each of the two sticking end portions 12B faces a side surface 11S3 that is an example of a sticking surface, and the protective film 12 does not have a portion that faces the back surface 11S2. An adhesive layer 12T having adhesiveness to the side surface 11S3 is provided on the surface facing the side surface 11S3 in each of the two sticking end portions 12B. The pressure-sensitive adhesive layer 12T is attached to the side surface 11S3, and increases the strength with which the protective film 12 and the side surface 11S3 are in close contact with each other than the strength with which the protective film 12 and the optical functional surface 11S1 are in close contact. Thereby, the protective film 12 is positioned with respect to the optical component 11.

  If the above-described protective film 12 is attached, the length of the protective film 12 is shortened by the amount that the protective film 12 is not bent toward the back surface 11S2, and thus is required for the optical component packaging body. The size of the protective film 12 can be reduced.

  In the optical component 11 having a plate shape, the area of the side surface 11S3 is sufficiently smaller than the area of the back surface 11S2. As in the optical component packaging body in the embodiment described above, the optical component 11 and the protective film 12 are compared with the optical component packaging body of the first modification as long as the sticking end portion 12B is stuck to the back surface 11S2. And the degree of freedom of the portion to which the protective film 12 is attached is increased in the optical component 11. The effect according to this is obtained not only in the optical component package in the embodiment described above but also in a configuration in which the sticking end portion 12B is stuck to both the back surface 11S2 and the side surface 11S3.

[Second Modification]
-The site | part covered by the two adhesion | attachment edge parts 12B in the optical component 11 is not restricted to a part of back surface 11S2, and the whole back surface 11S2 may be covered by the two adhesion | attachment edge parts 12B. In addition, the protective film 12 may include three sticking end portions 12B that are bent at one set of planes and another set of planes in the side surface 11S3 of the optical component 11, or two sets of planes. You may provide the four sticking edge parts 12B bent in each. At this time, the adherend surface covered by the two or more sticking end portions 12B is not limited to a part of the back face 11S2, and the entire back face 11S2 is covered by the two or more sticking end portions 12B. Also good.

  For example, as shown in FIG. 3, the protective film 12 covers the optical functional surface 11S1 of the optical component 11, a set of planes on the side surface 11S3, and the back surface 11S2. An adhesive layer 12T having adhesiveness to the back surface 11S2 is provided on the surface facing the back surface 11S2 in the sticking end portion 12B. The two sticking end portions 12 </ b> B of the protective film 12 are stuck to the back surface 11 </ b> S <b> 2 of the optical component 11, whereby the protective film 12 is positioned with respect to the optical component 11. The edges of the two sticking end portions 12B are in contact with each other on the back surface 11S2, and the two sticking end portions 12B cover the entire back surface 11S2.

  If the above-described protective film 12 is attached, the entire back surface 11S2 is protected by the protective film 12 in addition to the entire optical functional surface 11S1. Therefore, it is possible to improve the protection against the optical component 11 when the optical component package is transported or stored. In addition, since both the optical functional surface 11S1 and the back surface 11S2 are covered with the protective film 12, it is suitable for adding an optical function to the back surface 11S2.

[Third Modification]
The two sticking end portions 12B that the protective film 12 has may overlap each other on the back surface 11S2. At this time, as long as the two sticking end portions 12B are attached to each other, at least one of the two sticking end portions 12B may not be attached to the back surface 11S2. That is, even if it is the structure where the sticking edge part 12B is not stuck to the optical component 11, if it is the structure where the protective films 12 are stuck in the aspect in which the protective film 12 contacts the optical component 11, the protective films 12 Is stronger than the strength of adhesion between the protective film 12 and the optical functional surface 11S1. This also makes it possible to position the protective film 12 with respect to the optical component 11.

  In addition, the protective film 12 may include three sticking end portions 12B that are bent at one set of planes and another set of planes in the side surface 11S3 of the optical component 11, or two sets of planes. You may provide the four sticking edge parts 12B bent in each. At this time, at least two sticking end portions 12B selected from the two or more sticking end portions 12B may also overlap each other on the back surface 11S2. In addition, at least one of the two or more sticking end portions 12B may not be stuck to the back surface 11S2.

  For example, as shown in FIG. 4, the protective film 12 covers the optical functional surface 11S1 of the optical component 11, a set of planes on the side surface 11S3, and the back surface 11S2. Among the two sticking end portions 12B, the other sticking end portion 12B that overlaps with the sticking end portion 12B has a surface facing the one sticking end portion 12B, and is adhesive to the sticking end portion 12B. A pressure-sensitive adhesive layer 12T is provided. The two sticking end portions 12B of the protective film 12 are bonded to each other in the overlapping portion 12D which is a portion overlapping each other, and the protective films 12 are attached to each other in such a manner that the protective film 12 is in contact with the optical component 11, The protective film 12 is positioned with respect to the optical component 11.

  If the above-described protective film 12 is attached, the entire back surface 11S2 is protected by the protective film 12 in addition to the entire optical functional surface 11S1. Therefore, it is possible to improve the protection against the optical component 11 when the optical component package is transported or stored. In addition, since both the optical functional surface 11S1 and the back surface 11S2 are covered with the protective film 12, it is suitable for adding an optical function to the back surface 11S2. In particular, since it is possible to adopt a configuration in which the optical component 11 and the protective film 12 are not bonded via an adhesive layer, the adhesive is attached to a portion of the optical component 11 to which an optical function has been imparted. It can be suppressed. As a result, the protection of the optical function with respect to the optical component 11 may be enhanced.

[Fourth Modification]
-At least a part of the back surface 11S2 of the optical component 11 is not limited to a flat surface, but may be an uneven surface or a curved surface having a step.
For example, as shown in FIG. 5, the back surface 11S2 of the optical component 11 is provided with the concave and convex repeats 11A3 having a sufficiently large interval compared to the optical structure 11A1. The repetition 11A3 of the unevenness on the back surface 11S2 may be separately provided with an optical function, may be formed due to restrictions in the manufacturing process of the optical component 11, and anchors the adhesiveness with the sticking end 12B. A function to enhance the effect may be given.
If the back surface 11S2 has the above-described structure, it is also possible to add a function to the back surface 11S2 of the optical component 11 separately.

[Fifth Modification]
The optical component 11 is not limited to a rectangular plate shape, but may be a rotating plate shape such as a circular plate shape, a disk shape, or a spheroid shape. In short, the optical component 11 may be a structure provided with an optical functional surface on which an optical structure is formed and an adherend surface located on the opposite side of the optical functional surface. In addition, when the optical component 11 has a rotating body shape, the number of sticking end portions 12B may be two, or may be three or more.

  For example, as shown in FIG. 6, in the optical component 11, both the optical functional surface 11S1 and the back surface 11S2 have a convex curved surface shape, and the optical component 11 does not have the side surface 11S3. An optical structure 11A1 that functions as a Fresnel lens is formed on the optical function surface 11S1.

  The protective film 12 includes a covering portion 12A that covers the optical functional surface 11S1, and two sticking end portions 12B that are bent from the optical functional surface 11S1 toward the back surface 11S2 that is located on the opposite side of the optical functional surface 11S1. ing. An adhesive layer 12T having adhesiveness is provided on the surface facing the back surface 11S2 in each of the two sticking end portions 12B. The adhesive layer 12T is attached to the back surface 11S2, and thereby the protective film 12 is positioned with respect to the optical component 11.

  Even in the optical component package including the optical component 11 described above, when the protective film 12 is peeled off from the back surface 11S2, the optical functional surface 11S1 is still protected by the protective film 12. Therefore, effects according to the above (1) to (4) can be obtained.

  In the fifth modified example, the plurality of sticking end portions 12B may overlap each other on the back surface 11S2, and at this time, if the plurality of sticking end portions 12B are attached to each other, a plurality of sticking end portions 12B may be provided. At least one of the landing end portions 12B may not be attached to the back surface 11S2. That is, the fifth modified example may be combined with the third modified example.

[Sixth Modification]
-The structure which positions the protective film 12 with respect to the optical component 11 attaches the protective film 12 to the optical component 11 like the said embodiment, and sticks protective films 12 like the said 3rd modification. In addition to wearing, an adhesive tape may be used separately. Note that the adhesive tape may bond the optical component 11 and the protective film 12 or may bond the protective films 12 together.

  For example, as shown in FIG. 7, the protective film 12 covers the optical functional surface 11S1 of the optical component 11, a set of planes on the side surface 11S3, and the back surface 11S2. The two sticking end portions 12B are opposed to the different portions on the back surface 11S2 of the optical component 11. Each of the two adhesive tapes 13 includes a distal end portion 13T1 having adhesiveness to the back surface 11S2 and a proximal end portion 13T2 having adhesiveness to the sticking end portion 12B. Each of the two sticking end portions 12 </ b> B is stuck to the back surface 11 </ b> S <b> 2 by the adhesive tape 13, whereby the protective film 12 is positioned with respect to the optical component 11.

  -In the said 6th modification, even if the sticking edge part 12B is not fixed to the back surface 11S2 of the optical component 11, the sticking edge part 12B may be equipped with the adhesion layer which adheres with respect to the back surface 11S2 of the optical component 11. However, a configuration without such an adhesive layer may be employed.

  -In the said 6th modification, the sticking end part 12B covers only the side surface 11S3, and the adhesive tape 13 should just adhere | attach the sticking end part 12B and at least one of the side surface 11S3 and the back surface 11S2.

  In the sixth modification, the plurality of sticking end portions 12B may overlap on the back surface 11S2. At this time, at least one of the plurality of sticking end portions 12B does not have to be attached to the back surface 11S2, and may be configured to be attached to each other with an adhesive tape.

[Optical component 11]
The shape of the optical component 11 is not limited to a rectangular plate shape, and may be, for example, a disc shape, an elliptical disc shape, or as appropriate according to the application to which the optical component 11 is applied. Can be changed.
The optical functional surface of the optical component 11 is not limited to a planar shape, and may be, for example, a curved surface shape or a combination of a planar shape and a curved surface shape.

  The optical functional surface 11S1 only needs to have the optical structure 11A1, and the optical structure 11A1 may extend to a part of the edge of the optical functional surface 11S1, or the optical structure 11A1 is the entire optical functional surface 11S1. It may spread to. That is, at least a part of the flat portion 11A2 may be omitted.

  In the optical functional surface 11S1, the tip of the convex portion constituting the optical structure 11A1 may protrude toward the outside of the optical component 11 rather than the flat portion, or at least one of the tip of the convex portion constituting the optical structure 11A1 The portion may be recessed from the flat portion 11A2. Moreover, the front-end | tip of all the convex parts which comprise optical structure 11A1 may be depressed rather than flat part 11A2.

  The back surface 11S2 may have a concavo-convex structure different from the optical structure 11A1, and may be a surface that exhibits an optical function by the concavo-convex structure. At this time, it is only necessary that the resistance to contact with the user's finger or the like is sufficiently higher on the back surface 11S2 than on the optical function surface 11S1. For example, what is necessary is just a structure whose average space | interval of the convex part which back surface 11S2 has is sufficiently larger than the average space | interval of the convex part which optical structure 11A1 has. As described above, even in the optical component 11 having the concavo-convex structure on both surfaces, the optical functional surface 11S1 that is a surface to be protected is not a little protected.

[Protective film 12]
The covering portion 12A of the protective film 12 may include an adhesive layer on the surface facing the optical structure 11A1, and the adhesive layer of the covering portion 12A may be attached to the optical structure 11A1. Moreover, 12 A of coating | coated parts in the protective film 12 are equipped with the adhesion layer in the surface facing flat part 11A2, and the adhesion layer of 12 A of coating | coated parts may be stuck on flat part 11A2. The protective film 12 may include an adhesive layer on a surface facing the side surface of the optical component 11, and the adhesive layer may be attached to the side surface.

  That is, the protective film 12 includes an adhesive layer on at least one of the surface facing the optical structure 11A1, the surface facing the flat portion 11A2, and the surface facing the side surface 11S3, and at a portion other than the sticking end portion 12B. May also be attached to the optical component 11. And the intensity | strength by which the sticking end part 12B is stuck to the optical component 11 should just be larger than the sticking strength in parts other than the sticking end part 12B.

  In addition, if it is the structure by which the adhesion layer of the protective film 12 is not stuck on optical structure 11A1, it will be suppressed that an adhesive enters between the convex parts adjacent to each other in optical structure 11A1. Therefore, it is possible to prevent the optical function originally possessed by the optical structure 11 </ b> A <b> 1 from being deteriorated by attaching the protective film 12.

  The protective film 12 may cover the side surface 11S3 over the entire side surface 11S3 of the optical component 11, and may be attached to the back surface 11S2 over the entire circumferential direction of the back surface 11S2. If the protective film 12 is attached to the entire back surface 11S2 in the circumferential direction, the optical structure 11A1 is further suppressed from being contaminated by foreign matters. In the configuration in which the protective film 12 is attached only to a part in the circumferential direction on the back surface 11S2, the labor required for manufacturing the optical component package is reduced.

  -The protective film 12 may have the light transmittance which permeate | transmits light, and may have the light-shielding property which light-shields light. Moreover, the protective film 12 may have gas permeability which permeate | transmits a water | moisture content etc., and may have a gas barrier property which interrupt | blocks a water | moisture content etc. Functions other than the protective function of the protective film 12 are appropriately selected from a range suitable for the optical component 11.

  DESCRIPTION OF SYMBOLS 11 ... Optical component, 11A1 ... Optical structure, 11A2 ... Flat part, 11S1 ... Optical functional surface, 11S2 ... Back surface, 11S3 ... Side surface, 12 ... Protective film, 12B ... Adhering edge part, 12T ... Adhesive layer, 12D ... Overlapping part , 13 ... Adhesive tape.

Claims (8)

A plate-like optical component having an optical functional surface on which an optical structure is formed;
A protective film in contact with the optical functional surface;
With
The optical component includes a surface to be attached which is a surface located on the side opposite to the optical functional surface,
The protective film is attached to the adherend surface,
The intensity | strength which the said to-be-adhered surface and the said protective film closely_contact | adhere is higher than the intensity | strength which the said optical functional surface and the said protective film contact | adhere. A plate-like optical component having an optical functional surface on which an optical structure is formed;
A protective film in contact with the optical functional surface;
With
The optical component is
A back surface which is a surface located on the opposite side to the optical function surface;
A side surface that is a surface connecting the optical functional surface and the back surface;
At least one of the back surface and the side surface is a surface to be adhered,
The protective film is attached to the adherend surface,
The intensity | strength which the said to-be-adhered surface and the said protective film closely_contact | adhere is higher than the intensity | strength which the said optical functional surface and the said protective film contact | adhere. The optical component package according to claim 2, wherein the adherend surface is the side surface. A plate-like optical component having an optical functional surface on which an optical structure is formed;
A protective film in contact with the optical functional surface;
With
The optical component includes a back surface that is a surface located on the side opposite to the optical function surface,
The protective film includes an overlapping portion that overlaps the back surface,
The intensity | strength which the said protective films adhere in the said superimposition part is higher than the intensity | strength which the said optical function surface and the said protective film contact | adhere. The optical component package according to any one of claims 1 to 4, wherein a tensile elastic modulus of the optical component is 0.3 GPa or more. The optical component package according to any one of claims 1 to 5, wherein a tensile elastic modulus of the optical component is 1.0 GPa or more. The optical component package according to any one of claims 1 to 6, wherein a period in which unevenness is repeated in the optical structure is equal to or less than a wavelength of light in an environment in which the optical component is used. The optical component package according to any one of claims 1 to 7, wherein the optical structure has an antireflection function.

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