JP2014160096A - Manufacturing method of lens unit and manufacturing method of lens array unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of a lens unit capable of obtaining the lens unit having less sealing failure.SOLUTION: A manufacturing method of a lens unit includes: a dropping step; a sealing space forming step; and a cut-off step. In the dropping step, an adhesive agent is dropped on a plurality of places for at least either an adhesive region on a first lens array having a plurality of lens parts or an adhesive region on an opposed member. In the sealing space forming step, both of the adhesive regions are made oppose to each other and pressed so that the lens array and the opposed member are bonded, and the sealing space is formed for each of the plurality of lenses. Further, in the dropping step, dropping conditions of the adhesive agent for the first adhesion region and the dropping conditions of the adhesive agent for a second adhesive region other than the first adhesive region are made to differ, and in the sealing space forming step, when pressed, the plurality of adhesive agents in the first adhesive region is connected before the plurality of adhesive agents in the second adhesive region.

Description

  The present invention relates to a method for manufacturing a lens unit and a method for manufacturing a lens array unit.

  In the field of manufacturing optical lenses, there is a technique for improving heat resistance by forming a lens portion made of a curable resin (such as a thermosetting resin or a photocurable resin) on a glass substrate. As a method of manufacturing a lens unit to which this technique is applied, for example, there is a method described in Patent Document 1.

  In the manufacturing method of an imaging lens (lens unit) described in Patent Document 1, first, wafer lenses 1 and 3 having a plurality of resin lens portions 13 and 14 provided on both surfaces of a glass substrate 10 are manufactured. Next, the wafer lenses 1 and 3 are stacked via the spacer 2. Wafer lenses 1 and 3 and spacer 2 are fixed by an adhesive dropped on the bonding portion to obtain a lens array unit, and thereby a sealed space sealed by wafer lenses 1 and 3 and spacer 2 Is formed (see FIG. 1B of Patent Document 1). Thereafter, each lens unit is divided into individual pieces to obtain a plurality of imaging lenses (lens units). At this time, since there is a possibility of affecting the performance of the lens unit, it is necessary to prevent foreign matters (dust, water, etc.) from entering the sealed space.

JP 2011-43605 A

  When directly joining glass molding lens arrays, or when joining wafer lens arrays via a spacer as in Patent Document 1, annularly so as to surround each lens part with respect to the lens array or spacer. When these are laminated after applying the adhesive, the space formed between the lenses is sealed with the adhesive, and when pressure is applied to join the lens arrays together, the pressure in the sealed space rises and seals The gas in the space may break through the adhesive. Therefore, it is conceivable to arrange the dots in a dotted manner by dropping an adhesive. In this way, when pressure is applied to join the lens arrays, the gas in the space formed between the lenses escapes from the gap between the adhesives, so that it is possible to avoid breaking through the adhesives. It is expected. However, it has been found that the following problems actually exist.

  FIG. 31A to FIG. 31C show an example in which an adhesive is dropped and arranged in a dot shape, and is a view of a lens array (a lens unit in FIG. 31C) viewed from the optical axis direction of the lens. 31B and 31C show a state in which the other lens array is pressed against one lens array, but the other lens array is not shown in the drawing. Each lens array is provided with a concave lens portion L, and each concave lens portion L is opposed to form a space (a sealed space after being joined).

  When the lens arrays are pressed together, as shown in FIG. 31A, the gas in the space formed between the lens portions tends to escape outside the space (see the arrow in FIG. 31A). When the lens portions L are close to each other, the adhesive 2 in the adhesion region adjacent to the lens portions L is connected in a direction surrounding each lens portion L by a part of the gas escaped from the space (broken arrows in FIG. 31A). On the contrary, by connecting with an adhesive around the adjacent lens portion L, it is connected to other spaces, which may cause a sealing failure (see FIG. 31B).

  If each lens portion L is cut in such a state (see FIG. 31C), there is a problem that cutting fluid or water enters the space from the unsealed portion α and affects the performance of the lens unit. . Since the unsealed part is surrounded by the lens part and the adhesive 2, the adhesive 2 cannot be additionally applied before cutting.

  Accordingly, an object of the present invention is to provide a lens unit manufacturing method and a lens array unit manufacturing method capable of obtaining a lens unit and a lens array unit with few sealing defects in order to solve the above problems. To do.

In order to solve the above-mentioned problem, the method of manufacturing a lens unit according to claim 1 includes a dropping step, a sealing space forming step, and a cutting step. The dropping step is performed by adhering to at least one of an adhesion region on the first lens array having a plurality of lens portions arranged two-dimensionally and an adhesion region on an opposing member provided to face the first lens array. The agent is dropped at a plurality of locations. In the sealing space forming step, both the adhesive regions are opposed to each other, and at least one of the first lens array and the facing member is pressed against the other, thereby joining the first lens array and the facing member, and a plurality of lenses. A sealed space is formed for each part. In the cutting step, the bonded first lens array and the opposing member are cut in units of sealing space. Further, in the dropping step, the adhesive dripping conditions for the first adhesive region set at a position corresponding to the plurality of lens portions in the adhesive region, and the adhesive dripping for the other second adhesive regions. In the sealed space forming step, the plurality of adhesives in the first adhesive region are connected before the plurality of adhesives in the second adhesive region at the time of pressing in the sealed space forming step.
In order to solve the above-mentioned problem, the lens unit manufacturing method according to claim 2 is the lens unit manufacturing method according to claim 1, wherein the first lens array surrounds each of the plurality of lens portions. And the protrusion part which has an adhesion | attachment area | region is provided in the top part. Then, in the sealing space forming step, the top of the protrusion and the opposing member are joined, so that the protrusion forms a side wall of the sealing space.
In order to solve the above-mentioned problem, the lens unit manufacturing method according to claim 3 is the lens unit manufacturing method according to claim 1, wherein the opposing member is joined to the first lens array. In addition, a protrusion that surrounds each of the plurality of lens portions and has an adhesive region on the top thereof is provided. In the sealing space forming step, the first lens array and the top of the protrusion are joined, so that the protrusion forms a side wall of the sealing space.
In order to solve the above problem, a method for manufacturing a lens unit according to claim 4 is the method for manufacturing a lens unit according to claim 1, wherein the first lens array surrounds each of a plurality of lens portions. And a first protrusion having an adhesive region on its top, and the opposing member surrounds each of the plurality of lens portions when joined to the first lens array and has an adhesive region on its top. Two protrusions are provided. Then, in the sealing space forming step, the top of the first protrusion and the top of the two protrusions are joined, so that the first protrusion and the second protrusion form a side wall of the sealing space.
Moreover, in order to solve the said subject, the manufacturing method of the lens unit of Claim 5 has a dripping step, a sealing space formation step, and a cutting | disconnection step. The dropping step includes an adhesion region on the first lens array having a plurality of lens portions arranged two-dimensionally, an adhesion region on an opposing member provided to face the first lens array, and the first lens array. A bonding region provided on both surfaces of a spacer substrate having a plurality of holes for receiving a plurality of lens portions when the first lens array is disposed between the opposing members and the first lens array; Adhesive is applied to a plurality of locations for at least one of the adhesion area of one lens array and the adhesion area of one side of the spacer substrate and at least one of the adhesion area of the opposing member and the adhesion area of the other side of the spacer substrate. Dripping. In the sealing space forming step, the adhesive region of the first lens array and the adhesive region on one side of the spacer substrate are opposed to each other, at least one of the first lens array and the spacer substrate is pressed against the other, and the opposing member The adhesive region and the adhesive region on the other surface side of the spacer substrate are opposed to each other, and at least one of the opposing member and the spacer substrate is pressed against the other, thereby joining the first lens array, the opposing member, and the spacer substrate. A sealing space is formed for each lens portion. In the cutting step, the bonded first lens array, the facing member, and the spacer substrate are cut in units of sealing space. Further, in the dropping step, the adhesive dripping conditions for the first adhesive region at a position corresponding to the position between the plurality of lens portions in the adhesive region, and the adhesive dripping conditions for the other second adhesive regions are set. In the sealed space forming step, the plurality of adhesives in the first adhesive region are connected before the plurality of adhesives in the second adhesive region at the time of pressing.
In order to solve the above-described problem, the lens unit manufacturing method according to claim 6 is the lens unit manufacturing method according to any one of claims 1 to 5, wherein the first bonding is performed in the dropping step. The adhesive interval in the region is made smaller than the adhesive interval in the second adhesive region.
In order to solve the above-mentioned problem, the manufacturing method of the lens unit according to claim 7 is the manufacturing method of the lens unit according to any one of claims 1 to 6, wherein the dropping condition is dropping of the adhesive. Includes position spacing. And the space | interval of the dripping position of the adhesive agent dripped at a 1st adhesion area | region and the space | interval of the dripping position of the adhesive agent dripped at a 2nd adhesion area | region are changed.
In order to solve the above-described problem, a method for manufacturing a lens unit according to claim 8 is the method for manufacturing a lens unit according to any one of claims 1 to 7, wherein the first adhesion region is at least A region surrounded by three lens portions and a region between two adjacent lens portions are included. And the space | interval of the adhesive agent in the area | region enclosed by an at least 3 lens part is smaller than the space | interval of the adhesive agent in the area | region between two adjacent lens parts.
In order to solve the above problem, a method for manufacturing a lens unit according to claim 9 is a method for manufacturing a lens unit according to any one of claims 1 to 8, wherein the dropping condition is dropping of an adhesive. Including quantity. And the dripping amount of the adhesive dripped at the 1st adhesion field and the dripping amount of the adhesive dripped at the 2nd adhesion field are changed.
In order to solve the above problem, a method for manufacturing a lens unit according to claim 10 is the method for manufacturing a lens unit according to any one of claims 1 to 9, wherein the opposing member is a plate-shaped member. is there.
In order to solve the above problem, a method for manufacturing a lens unit according to claim 11 is the method for manufacturing a lens unit according to any one of claims 1 to 10, wherein the opposing member is two-dimensionally. It is the 2nd lens array which has a plurality of lens parts arranged.
Moreover, in order to solve the said subject, the manufacturing method of the lens array unit of Claim 12 has a dripping step and a sealing space formation step. The dropping step is performed by adhering to at least one of an adhesion region on the first lens array having a plurality of lens portions arranged two-dimensionally and an adhesion region on an opposing member provided to face the first lens array. The agent is dropped at a plurality of locations. In the sealing space forming step, both the adhesive regions are opposed to each other, and at least one of the first lens array and the facing member is pressed against the other, thereby joining the first lens array and the facing member, and a plurality of lenses. A sealed space is formed for each part. Further, in the dropping step, the adhesive dripping conditions for the first adhesive region set at a position corresponding to the plurality of lens portions in the adhesive region, and the adhesive dripping for the other second adhesive regions. In the sealed space forming step, the plurality of adhesives in the first adhesive region are connected before the plurality of adhesives in the second adhesive region at the time of pressing in the sealed space forming step.
In order to solve the above problem, the lens array unit manufacturing method according to claim 13 includes a dropping step and a sealing space forming step. The dropping step includes an adhesion region on the first lens array having a plurality of lens portions arranged two-dimensionally, an adhesion region on an opposing member provided to face the first lens array, and the first lens array. A bonding region provided on both surfaces of a spacer substrate having a plurality of holes for receiving a plurality of lens portions when the first lens array is disposed between the opposing members and the first lens array; Adhesive is applied to a plurality of locations for at least one of the adhesion area of one lens array and the adhesion area of one side of the spacer substrate and at least one of the adhesion area of the opposing member and the adhesion area of the other side of the spacer substrate. Dripping. In the sealing space forming step, the adhesive region of the first lens array and the adhesive region on one side of the spacer substrate are opposed to each other, at least one of the first lens array and the spacer substrate is pressed against the other, and the opposing member The adhesive region and the adhesive region on the other surface side of the spacer substrate are opposed to each other, and at least one of the opposing member and the spacer substrate is pressed against the other, thereby joining the first lens array, the opposing member, and the spacer substrate. A sealing space is formed for each lens portion. Further, in the dropping step, the adhesive dripping conditions for the first adhesive region at a position corresponding to the position between the plurality of lens portions in the adhesive region, and the adhesive dripping conditions for the other second adhesive regions are set. In the sealing space step, the plurality of adhesives in the first adhesive region are connected before the plurality of adhesives in the second adhesive region at the time of pressing.
In order to solve the above problem, a method for manufacturing a lens array unit according to claim 14 is the method for manufacturing a lens array unit according to claim 12 or 13, wherein in the dropping step, in the first adhesion region. The adhesive interval is made smaller than the adhesive interval in the second adhesive region.

  According to the present invention, in the dropping step, the adhesive dropping condition for the first adhesive region set at a position corresponding to the plurality of lens portions, and the adhesive dropping condition for the other second adhesive region. And different. In the sealing space step, when the lens array and the opposing member are pressed, the plurality of adhesives in the first adhesive region are connected before the plurality of adhesives in the second adhesive region. For this reason, it can prevent that the adhesive agent dripped between several lens parts is pushed with the gas which escapes outside from the space formed for every lens part, and the said spaces connect. Therefore, it is possible to manufacture a lens unit with few sealing defects.

It is a flowchart which shows the shaping | molding process of a lens array. It is a figure which supplements description of the flowchart of FIG. It is a figure which supplements description of the flowchart of FIG. It is a figure which supplements description of the flowchart of FIG. It is a flowchart which shows the manufacturing process of the lens unit which concerns on 1st Embodiment. It is a figure which supplements description of the flowchart of FIG. It is a figure which supplements description of the flowchart of FIG. It is a figure which supplements description of the flowchart of FIG. It is a figure which supplements description of the flowchart of FIG. It is a figure for demonstrating the dripping example of the adhesive agent which concerns on 1st Embodiment. It is a figure for demonstrating the dripping example of the adhesive agent which concerns on 1st Embodiment. It is a figure for demonstrating the dripping example of the adhesive agent which concerns on 1st Embodiment. It is a figure for demonstrating the dripping example of the adhesive agent which concerns on 1st Embodiment. It is a figure for demonstrating the dripping example of the adhesive agent which concerns on 1st Embodiment. It is a figure which shows the structure of a spacer board | substrate. It is a flowchart which shows the manufacturing process of the lens unit which concerns on 2nd Embodiment. It is a figure which supplements description of the flowchart of FIG. It is a figure which supplements description of the flowchart of FIG. It is a figure which supplements description of the flowchart of FIG. It is a figure which supplements description of the flowchart of FIG. It is a figure which supplements description of the flowchart of FIG. It is a figure which supplements description of the flowchart of FIG. It is a figure for demonstrating the dripping example of the adhesive agent which concerns on the modification 1. FIG. It is a figure for demonstrating the dripping example of the adhesive agent which concerns on the modification 1. FIG. It is a figure for demonstrating the dripping example of the adhesive agent which concerns on the modification 1. FIG. It is a figure for demonstrating the dripping example of the adhesive agent which concerns on the modification 1. FIG. FIG. 10 is a diagram showing a configuration of a first lens array according to Modification 2. FIG. 10 is a diagram showing a configuration of a first lens array according to Modification 2. FIG. 10 is a diagram showing a configuration of a first lens array according to Modification 2. FIG. 10 is a diagram showing a configuration of a first lens array according to Modification 2. It is a figure for demonstrating the conventional subject. It is a figure for demonstrating the conventional subject. It is a figure for demonstrating the conventional subject.

<First Embodiment>
A method for manufacturing the lens unit 1 according to the present embodiment will be described with reference to FIGS. In the present embodiment, as shown in FIG. 4, the first lens array IM1 is configured to have four lens portions La arranged in a two-dimensional matrix (FIG. 4 shows the first lens array IM1 viewed from the side. Since only the two lens portions La are shown). Further, as a facing member provided to face the first lens array IM1, as shown in FIG. 6, a configuration having four lens portions Lb arranged in a two-dimensional matrix (second lens array IM2, FIG. 6). Since the second lens array IM2 is viewed from the side, only two lens portions Lb are described.

<Lens array molding process>
First, the molding process of the lens array will be described with reference to FIGS. FIG. 1 is a flowchart showing a molding process of the lens array according to this embodiment. In the present embodiment, molds (upper mold 12 and lower mold 22) that can produce the first lens array IM1 having four lens portions La in one molding process are used. 2-4, the structure which looked at the metal mold | die and 1st lens array IM1 from the side surface is demonstrated.

  As shown in FIG. 2, the upper mold 12 includes a bottom plate 4, a spacer 5, a core support member 11, and a core 13.

  The bottom plate 4 is a plate-like member that covers the upper bottom of the upper mold 12. The spacer 5 adjusts the protruding amount of the core 13. The core support member 11 is provided in the upper mold 12 and supports the core 13. The core 13 has a transfer surface 13a (in this embodiment, a convex shape), and the shape is transferred by being pressed against the glass GL. In the present embodiment, four core support members 11 and four cores 13 are provided. The cores 13 are arranged in a matrix on the lower surface 12 b of the upper mold 12.

  As shown in FIG. 2, the lower mold 22 includes a bottom plate 4, a spacer 5, a core support member 21, and a core 23.

  The bottom plate 4 is a plate-like member that covers the lower bottom of the lower mold 22. The spacer 5 adjusts the protruding amount of the core 23. The core support member 21 is provided in the lower mold 22 and supports the core 23. The core 23 has a transfer surface 23a (in this embodiment, a concave shape), and the shape is transferred by being pressed against the glass GL. In the present embodiment, four core support members 21 and four cores 23 are provided. The cores 23 are arranged in a matrix on the upper surface 22 b of the lower mold 22.

  For molding the first lens array IM1, first, as shown in FIG. 2, the lower mold 22 is positioned below the platinum nozzle NZ communicating with a storage unit (not shown) for storing the molten glass GL. Then, droplets of glass GL melted from the platinum nozzle NZ are collectively dropped onto the upper surface 22b of the lower mold 22 (S10). In such a state, since the viscosity of the glass GL is low, the dropped glass GL spreads on the upper surface 22 b and easily enters the transfer surface 23 a of the core 23. Thereby, the shape of the transfer surface 23a is transferred to the glass GL (S11).

  Next, the lower mold 22 to which the glass GL is dropped in S10 is moved to a position below the upper mold 12 before the glass GL is cooled, so that the upper mold 12 and the lower mold 22 are opposed to each other. Then, the upper mold 12 and the lower mold 22 are aligned using a positioning guide (not shown) (S12).

  Further, as shown in FIG. 3, the upper mold 12 and the lower mold 22 are brought close to each other to form the glass GL. Thereby, the shape of the transfer surface 13a of the core 13 is transferred to the glass GL (S13). At this time, the lower surface 12b of the upper mold 12 and the upper surface 22b of the lower mold 22 are held so as to be separated from each other by a predetermined distance to cool the glass GL. The glass GL solidifies in a state where it goes around and covers the tapered portion 22g.

  Thereafter, as shown in FIG. 4, the first lens array IM1 is molded by separating the upper mold 12 and the lower mold 22 and taking out the glass GL (S14). The second lens array IM2 is molded by the same method.

  As shown in FIG. 4, the first lens array IM1 includes a concave optical surface IM1b transferred and molded by the transfer surface 13a of the upper mold 12 and a convex optical surface transferred and formed by the transfer surface 23a of the lower mold 22. IM1e. The concave optical surface IM1b and the convex optical surface IM1e constitute the lens portion La.

  Similarly, the second lens array IM2 has a concave optical surface IM2b transferred and molded by the transfer surface 13a of the upper mold 12, and a convex optical surface IM2e transferred and formed by the transfer surface 23a of the lower mold 22. . The concave optical surface IM2b and the convex optical surface IM2e constitute the lens portion Lb (see FIG. 6).

  In the present embodiment, the first lens array IM1 and the second lens array IM2 have the same shape, but may have different shapes.

<Lens unit manufacturing process>
Next, the manufacturing process of the lens unit 1 will be described with reference to FIGS. FIG. 5 is a flowchart showing manufacturing steps of the lens unit 1 according to this embodiment.

  As shown in FIG. 6, the molded first lens array IM1 is held by the jig JZ, and the adhesive 2 is dropped onto the surface IM1a of the first lens array IM1 (S20). The adhesive 2 is dropped at a plurality of locations on the surface IM1a by a dropping device (not shown). In dropping the adhesive, the nozzle of the dropping device (not shown) is brought close to the surface IM1a of the first lens array IM1, which is the dropping target, so that the adhesive contacts both the nozzle and the surface IM1a. Although it is preferable to discharge the adhesive, the present invention is not limited to this, and the adhesive may be discharged so that the adhesive is separated from the nozzle when the adhesive reaches the surface IM1a. Details of the dropping method of the adhesive 2 will be described later. S20 is an example of the “dropping step” in the present embodiment. The surface IM1a and the surface IM2a are examples of the “adhesion region” in the present embodiment. Thereafter, the second lens array IM2 formed by the jig JZ is held, the surface IM1a of the first lens array IM1 is opposed to the surface IM2a of the second lens array IM2, and a donut plate-shaped light shielding member is interposed therebetween. SH is arranged (see FIG. 6).

  As the adhesive 2, for example, a photo-curable adhesive or a thermosetting adhesive made of an ene-thiol resin, an epoxy resin, an acrylic resin, or the like is used. Preferably, the adhesive has a viscosity in a dropping environment. The thing of 100-2000 mPa * s is used. If the viscosity is less than 100 mPa · s, the adhesives are immediately connected after dropping, and the spread of the adhesive during pressing as described later may not be controlled well, or the adhesive may not be sufficiently spread. is there. When the viscosity exceeds 2000 mPa · s, it is difficult to discharge the adhesive from the nozzle, which may make it unsuitable for manufacturing a small-diameter lens unit. In the present embodiment, the dropping is performed in a room temperature environment, and a polyene-polythiol-based adhesive having a UV (Ultra Violet) curing property (viscosity of 300 mPa · s at room temperature) is used as the adhesive 2.

  Next, as shown in FIG. 7, by pressing at least one of the first lens array IM1 and the second lens array IM2 against the other, the first lens array IM1 and the second lens array IM2a are passed through the surfaces IM1a and IM2a. The lens array IM2 is joined (S21). After pressing, the first lens array IM1 and the second lens array IM2 are joined by irradiating ultraviolet rays with UV illumination (not shown) or the like to cure the adhesive. In this way, the lens array unit IM3 is obtained.

  In the state of S21, the concave optical surface IM1b formed on the first lens array IM1 and the concave optical surface IM2b formed on the second lens array IM2 form a sealed space. S21 is an example of a “sealed space forming step” in the present embodiment. In the present embodiment, the “sealing space” refers to a space (concave optical surface IM1b and concave optical surface IM2b) sealed with the first lens array IM1, the opposing member (second lens array IM2), and an adhesive. Is a space isolated from the outside).

  Thereafter, as shown in FIG. 8, the lens array unit IM3 is removed from the jig JZ, and the lens array unit IM3 is cut in units of sealing space by the dicing blade DB (S22). “Cutting in units of sealing spaces” means separating each sealing space in a state where the respective sealing spaces are held. As a result, the lens unit 1 as shown in FIG. 9 is completed (S23. Only one lens unit 1 is shown in FIG. 9). In the present embodiment, four lens units 1 can be obtained from the lens array unit IM3. S22 is an example of a “cutting step” in the present embodiment.

<Adhesive dripping method>
Next, with reference to FIG. 10 to FIG. 14, the dropping method of the adhesive 2 according to the present embodiment will be described. In the present embodiment, a case where the adhesive 2 is dropped on the surface IM1a of the first lens array IM1 will be described. 10 to 14 are views of the first lens array IM1 as viewed from the concave optical surface IM1b side. FIGS. 12 to 14 show a state where the concave optical surface IM1b of the first lens array IM1 and the concave optical surface IM2b of the second lens array IM2 are pressed. The description of IM2 is omitted.

  As shown in FIG. 10, in the present embodiment, an adhesive region E is set in advance around the four lens portions La (concave optical surface IM1b). In addition, the adhesion area E includes an adhesion area E1 (first adhesion area E1) set between the plurality of lens portions La and another adhesion area E2 (second adhesion area E2). The adhesion region E1 is a region set in a polygon formed by an outer tangent among tangents in contact with both adjacent lens portions La. Furthermore, the adhesion region E1 is a region (in this embodiment, a region surrounded by four lens portions La) E11 surrounded by at least three lens portions La, and a region (this embodiment) sandwiched between two adjacent lens portions La. In the embodiment, four regions) E12 are included. The region E12 is a region surrounded by a tangent line that is in contact with both adjacent lens portions La, and is an arbitrary region excluding the region E11.

  In the present embodiment, in the dropping step of S20, the dropping condition of the adhesive 2 with respect to the first adhesive region E1 at a position corresponding to the position between the plurality of lens portions La, and the adhesive 2 with respect to the other second adhesive region E2 The dripping conditions are different. In the present embodiment, an example in which the interval between the dropping positions of the adhesive 2 is varied as the dropping condition will be described. The “dropping position” refers to a vertically lower position of the nozzle tip of a dropping device (not shown).

  Specifically, as shown in FIG. 11, the distance (p11, p12) between the dropping positions of the adhesive 2 in the first adhesive area E1 is the distance between the dropping positions of the adhesive 2 in the second adhesive area E2 ( Narrower than p2). Furthermore, in this embodiment, as shown in FIG. 11, the interval p11 of the dropping position of the adhesive 2 in the region E11 is made smaller than the interval p12 of the dropping position of the adhesive 2 in the region E12.

  For this purpose, the dropping device (not shown) moves relative to the first lens array IM1 while changing the moving pitch with respect to the first lens array IM1, and drops the adhesive 2 at a plurality of locations.

  In addition, in this embodiment, the dripping amount (diameter size) of each adhesive agent 2 shall be substantially uniform. For this reason, the intervals e11 and e12 of the adhesives 2 in the region E11 are smaller than the intervals e2 of the adhesives 2 in the region E12.

  After the adhesive 2 is dropped in this way, when the other is pressed against one of the first lens array IM1 and the second lens array IM2, the adhesive 2 spreads on the surface IM1a. And as shown in FIG. 12, the adjacent adhesives 2 are connected in order from the area | region E11 in which the adhesives 2 are densely arranged.

  When the pressing is further advanced, as shown in FIG. 13, the adhesive 2 disposed in the region E12 spreads while being connected along the circumference of the concave optical surface IM1b. As the adhesive 2 spreads in this way, the gas in the space formed by the concave optical surface IM1b and the concave optical surface IM2b moves from the portion where the adhesive 2 is not connected (in the direction of the arrow in FIG. 13) to the outside. Run away. At this time, the adhesives 2 in the region E11 are already connected to each other, and the part where the adhesives 2 are connected is pushed away by the gas so that the spaces around the adjacent lens parts do not communicate with each other. Accordingly, the spaces formed by the concave optical surface IM1b and the concave optical surface IM2b are not connected to each other, and a sealed space S in which each lens portion La is sealed is formed (see FIG. 14).

  In the present embodiment, the configuration in which the adhesive is dropped only on the surface IM1a of the first lens array IM1 has been described, but the target to which the adhesive is dropped is not limited to this. For example, a configuration in which the adhesive is dropped only on the surface IM2a of the second lens array IM2 may be employed. Or the structure by which an adhesive agent is dripped at both surface IM1a and surface IM2a may be sufficient. When the adhesive is dropped onto both the surface IM1a and the surface IM2a, the adhesive dropped onto both the surfaces IM1a and IM2a may be dropped so as to satisfy the above relationship when viewed from the optical axis direction of the lens.

  In the present embodiment, the description has been given using the second lens array IM2 as the facing member, but the present invention is not limited to this. For example, a plate-like member in which no lens part is formed can be used as the opposing member. In this case, a sealing space is formed by the concave optical surface IM1b of the first lens array IM1 and the plate member. In this case, the adhesive 2 may be dropped on the plate-like member side. At that time, the first adhesion region E1 is located at a position corresponding to the position between the plurality of lens portions La (on the plate-like member facing the plurality of lens portions La when the first lens array IM1 and the facing member are joined). Position).

<Action and effect>
The operation and effect of this embodiment will be described.

  The lens unit manufacturing method according to the present embodiment includes a dropping step, a sealed space forming step, and a cutting step. In the dropping step, the adhesive 2 is dropped at a plurality of locations on the adhesive region E (E1, E2) on the first lens array IM1 having a plurality of lens portions La arranged two-dimensionally. In the sealing space forming step, the adhesion region E and the adhesion region on the second lens array IM2 provided to face the first lens array IM1 are opposed to each other, and at least the first lens array IM1 and the second lens array IM2 By pressing one against the other, the first lens array IM1 and the second lens array IM2 are joined to form a sealing space for each of the plurality of lens portions La. In the cutting step, the joined first lens array IM1 and second lens array IM2 are cut in units of sealing space. Further, in the dropping step, the dropping condition of the adhesive 2 with respect to the first bonding area E1 set at a position corresponding to the position between the plurality of lens portions La in the bonding area, and the second bonding area E2 other than that. In the sealing space forming step, the plurality of adhesives 2 in the first adhesive region E1 are ahead of the plurality of adhesives 2 in the second adhesive region E2 at the time of pressing. It leads to.

  Moreover, the manufacturing method of the lens array unit which concerns on this embodiment has a dripping step and a sealing space formation step. The dropping step includes an adhesion region E (E1, E2) on the first lens array IM1 having a plurality of lens portions La arranged two-dimensionally, and a second lens array provided to face the first lens array IM1. The adhesive 2 is dropped at a plurality of locations on at least one of the adhesion regions E on the IM2. In the sealing space forming step, both the adhesion regions E are opposed to each other, and at least one of the first lens array IM1 and the second lens array IM2 is pressed against the other, thereby the first lens array IM1 and the second lens. The array IM2 is joined to form a sealing space for each of the plurality of lens portions La. Furthermore, in the dropping step, the dropping condition of the adhesive 2 with respect to the first bonding area E1 set at a position corresponding to the plurality of lens portions La in the bonding area E, and the other second bonding area E2 In the sealing space forming step, the plurality of adhesives 2 in the first adhesive region E1 is more than the plurality of adhesives 2 in the second adhesive region E2 at the time of pressing. Connect first.

  Further, in the dropping step according to the present embodiment, the interval (e11, e12) of the adhesive 2 in the first adhesive region E1 is made smaller than the interval (e2) of the adhesive 2 in the second adhesive region E2. Furthermore, the dropping condition according to the present embodiment includes the interval between the dropping positions of the adhesive 2. In the dropping step, the distance (p11, p12) between the dropping positions of the adhesive 2 dropped on the first adhesive region E1 and the distance (p2) between the dropping positions of the adhesive 2 dropped onto the second adhesive region E2. And change. More specifically, the first adhesion region E1 includes a region E11 surrounded by at least three lens portions La and a region E12 between two adjacent lens portions La, and is surrounded by at least three lens portions La. The distance e11 (p11) of the adhesive 2 in the area E11 is smaller than the distance e12 (p12) of the adhesive 2 in the area E12 between two adjacent lens portions La.

  Thus, in the dropping step, the adhesive dripping conditions for the first adhesive region set at a position corresponding to the plurality of lens portions and the adhesive dripping conditions for the other second adhesive regions are set. By making the difference, in the sealing space step, the plurality of adhesives in the first adhesive region is bonded to the plurality of adhesives in the second adhesive region when the one lens array and the other lens array that is the opposing member are pressed. Connect before the agent. For this reason, the adhesive dripped between the plurality of lens portions is not prevented from being pushed and connected by the gas escaping from the space formed for each lens portion to the outside. Accordingly, it is possible to manufacture a lens unit and a lens array unit that have few sealing defects that cause an intrusion of cutting fluid or the like when being separated into pieces by cutting.

Second Embodiment
With reference to FIGS. 15 to 21, a method for manufacturing the lens unit 1 according to the present embodiment will be described. In the present embodiment, the lens unit 1 including the spacer substrate 3 as shown in FIG. 15 is manufactured. In the present embodiment, as shown in FIG. 19, the first lens array IM1 has a configuration having four lens portions La arranged in a two-dimensional matrix. As the facing member provided to face the first lens array, a configuration (second lens array IM2) having four lens portions Lb arranged in a two-dimensional matrix is used as shown in FIG. Detailed description of the same parts as in the first embodiment, such as the molding method of the first lens array IM1 and the second lens array IM2, will be omitted.

  FIG. 15 is a perspective view of the spacer substrate 3. The spacer substrate 3 is disposed between the first lens array IM1 and the second lens array IM2 (opposing member). The spacer substrate 3 has a plurality of hole portions 3a in which a plurality of lens portions La (lens portions Lb) are accommodated when bonded to the first lens array IM1 (second lens array IM2). That is, the plurality of lens portions La (lens portions Lb) and the plurality of hole portions 3a correspond one-to-one, and each lens portion La (lens portion Lb) is accommodated in the corresponding hole portion 3a. In the present embodiment, four hole portions 3a for four lens portions La (lens portions Lb) are provided.

<Lens unit manufacturing process>
The manufacturing process of the lens unit 1 according to the present embodiment will be described with reference to FIGS. FIG. 16 is a flowchart showing manufacturing steps of the lens unit 1 according to this embodiment. 17 to 21 are views of the first lens array IM1 (second lens array IM2, spacer substrate 3) viewed from the side.

  As shown in FIG. 17, the adhesive 2 is dropped on the surface 3b of the spacer substrate 3 (S30). The adhesive 2 is dropped at a plurality of locations on the surface 3b by a dropping device (not shown) or the like. For example, a method similar to that of the first embodiment can be used as a method for dropping the adhesive 2. S30 is an example of the “dropping step” in the present embodiment. The surface 3b and the surface IM2a ′ are examples of the “adhesion region” in the present embodiment. Thereafter, the molded second lens array IM2 is held by the jig JZ, and the surface 3b of the spacer substrate 3 and the surface IM2a ′ of the second lens array IM2 are opposed to each other (see FIG. 17).

  Then, as shown in FIG. 18, the adhesive 2 spreads on the surface 3b by pressing at least one of the spacer substrate 3 and the second lens array IM2 against the other. Then, the spacer substrate 3 and the second lens array IM2 are bonded by ultraviolet irradiation through the surface 3b and the surface IM2a ′ (S31).

  Next, as shown in FIG. 19, the adhesive 2 is dropped onto the surface 3c of the spacer substrate 3 (S32). The adhesive 2 is dropped at a plurality of locations on the surface 3c by a dropping device (not shown) or the like. For example, a method similar to that of the first embodiment can be used as a method for dropping the adhesive 2. S32 is an example of the “dropping step” in the present embodiment. The surface 3c and the surface IM1a are examples of the “adhesion region” in the present embodiment. Thereafter, the molded first lens array IM1 is held by the jig JZ, and the surface 3c of the spacer substrate 3 is opposed to the surface IM1a of the first lens array IM1 (see FIG. 19).

  Then, as shown in FIG. 20, the adhesive 2 spreads on the surface 3c by pressing at least one of the spacer substrate 3 and the first lens array IM1 against the other. Then, the spacer substrate 3 and the first lens array IM1 are bonded by ultraviolet irradiation through the surface 3c · IM1a (S33). In this way, the lens array unit IM3 is obtained.

  In the state of S33, the concave optical surface IM1b formed on the first lens array IM1, the convex optical surface IM2e formed on the second lens array IM2, and the inner wall surface of the hole 3a of the spacer substrate 3 form a sealed space. Form. S33 is an example of a “sealing space forming step” in the present embodiment. In the present embodiment, the “sealing space” is a space sealed by the first lens array IM1, the facing member (second lens array IM2), the inner wall surface of the spacer substrate 3, and the adhesive 2. .

  Thereafter, as shown in FIG. 21, the lens array unit IM3 is removed from the jig JZ, and the lens array unit IM3 is cut in units of sealing space by the dicing blade DB (S34). As a result, the lens unit 1 as shown in FIG. 22 is completed (S35. Only one lens unit 1 is shown in FIG. 22). In the present embodiment, four lens units 1 can be obtained from the lens array unit IM3. S34 is an example of a “cutting step” in the present embodiment.

  In the present embodiment, the configuration in which the adhesive is dropped only on the surfaces 3b and 3c of the spacer substrate 3 has been described, but the target to which the adhesive is dropped is not limited thereto. For example, an adhesive may be dropped on the surface IM1a of the first lens array IM1 and the surface IM2a of the second lens array IM2. Or the structure by which an adhesive agent is dripped at all of the surface 3b, 3c, surface IM1a, and surface IM2a may be sufficient.

  In the present embodiment, the description has been given using the second lens array IM2 as the facing member, but the present invention is not limited to this. For example, a plate-like member in which the lens portion La is not formed can be used as the opposing member. In this case, a sealing space is formed by the concave optical surface IM1b of the first lens array IM1, the plate member, and the inner wall surface of the spacer substrate 3.

<Action and effect>
The operation and effect of this embodiment will be described.

  The lens unit manufacturing method according to the present embodiment includes a dropping step, a sealed space forming step, and a cutting step. The dropping step includes a surface IM1a ′ on the first lens array IM1 having a plurality of lens portions La arranged two-dimensionally, and a surface IM2a on the second lens array IM2 provided to face the first lens array IM1. And a spacer having a plurality of hole portions 3a in which each of the plurality of lens portions La is accommodated when the first lens array IM1 is joined between the first lens array IM1 and the second lens array IM2. Regarding the adhesion regions (surfaces 3b and 3c) provided on both surfaces of the substrate 3, at least one of the adhesion region (surface 3b) on the one surface side of the surface IM1a ′ and the spacer substrate 3, and other surfaces IM2a and spacer substrate 3 The adhesive 2 is dripped at a plurality of locations with respect to each of at least one of the adhesion regions (surface 3c) on the surface side. In the sealing space forming step, IM1a ′ and the adhesion region (surface 3b) on one surface side of the spacer substrate 3 are opposed to each other, at least one of the first lens array IM1 and the spacer substrate 3 is pressed against the other, and the surface The adhesion region (surface 3c) on the other surface side of IM2a and the spacer substrate 3 is opposed to each other, and at least one of the second lens array IM2 and the spacer substrate 3 is pressed against the other, whereby the first lens array IM1, The two lens array IM2 and the spacer substrate 3 are joined to form a sealing space for each of the plurality of lens portions La. In the cutting step, the bonded first lens array IM1, second lens array IM2, and spacer substrate 3 are cut in units of sealing space. Further, in the dropping step, the dropping condition of the adhesive 2 to the first bonding area at a position corresponding to the position between the plurality of lens portions La in the bonding area, and the dropping of the adhesive 2 to the other second bonding areas. In the sealed space forming step, the plurality of adhesives 2 in the first adhesive region are connected before the plurality of adhesives 2 in the second adhesive region at the time of pressing in the sealing space forming step.

  Moreover, the manufacturing method of the lens array unit which concerns on this embodiment has a dripping step and a sealing space formation step. The dropping step includes a surface IM1a ′ on the first lens array IM1 having a plurality of lens portions La arranged two-dimensionally, and a surface IM2a on the second lens array IM2 provided to face the first lens array IM1. And a spacer having a plurality of hole portions 3a in which each of the plurality of lens portions La is accommodated when the first lens array IM1 is joined between the first lens array IM1 and the second lens array IM2. Regarding the adhesion regions (surfaces 3b and 3c) provided on both surfaces of the substrate 3, at least one of the adhesion region (surface 3b) on the one surface side of the surface IM1a ′ and the spacer substrate 3, and other surfaces IM2a and spacer substrate 3 The adhesive 2 is dripped at a plurality of locations with respect to each of at least one of the adhesion regions (surface 3c) on the surface side. In the sealing space forming step, IM1a ′ and the adhesion region (surface 3b) on one surface side of the spacer substrate 3 are opposed to each other, at least one of the first lens array IM1 and the spacer substrate 3 is pressed against the other, and the surface The adhesion region (surface 3c) on the other surface side of IM2a and the spacer substrate 3 is opposed to each other, and at least one of the second lens array IM2 and the spacer substrate 3 is pressed against the other, whereby the first lens array IM1, The two lens array IM2 and the spacer substrate 3 are joined to form a sealing space for each of the plurality of lens portions La. Further, in the dropping step, the dropping condition of the adhesive 2 to the first bonding area at a position corresponding to the position between the plurality of lens portions La in the bonding area, and the dropping of the adhesive 2 to the other second bonding areas. In the sealed space forming step, the plurality of adhesives 2 in the first adhesive region are connected before the plurality of adhesives 2 in the second adhesive region at the time of pressing in the sealing space forming step.

  In the lens array unit manufacturing method according to the present embodiment, in the dropping step, the interval between the adhesives 2 in the first adhesion region is made smaller than the interval between the adhesives 2 in the second adhesion region. As a result, the interval e1 between the adhesives 2 in the first adhesive region is smaller than the interval e2 between the adhesives 2 in the second adhesive region.

  As described above, even when the spacer substrate is used, in the dropping step, the dropping condition of the adhesive with respect to the first bonding region set at a position corresponding to the plurality of lens portions, and the other second conditions By making the adhesive dripping conditions different from those for the adhesive region, the plurality of adhesives in the first adhesive region can be changed when the one lens array and the other lens array as the opposing member are pressed in the sealing space step. , Connecting before the plurality of adhesives in the second adhesive region. For this reason, the adhesive dripped between the plurality of lens portions is not prevented from being pushed and connected by the gas escaping from the space formed for each lens portion to the outside. Accordingly, it is possible to manufacture a lens unit and a lens array unit that have few sealing defects that cause an intrusion of cutting fluid or the like when being separated into pieces by cutting. Note that when the lens array and the spacer substrate are bonded, it is not always necessary to drop the adhesive and dispose it in the form of dots, but when the spacer substrate is supported by a flat support, the lens array and the spacer substrate In the case where a sealed space is formed around the lens portion due to the bonding, the adhesive is preferably dropped in the same manner as described above.

<Modification 1>
Next, with reference to FIG. 23 to FIG. 26, the dropping method of the adhesive 2 according to this modification will be described. In this modification, a case where the adhesive 2 is dropped onto the first lens array IM1 (surface IM1a) will be described. 23 to 26 are views of the first lens array IM1 as viewed from above. 23 to 26 show a state in which the second lens array IM2 is pressed against the first lens array IM1, the illustration of the second lens array IM2 is omitted in the drawings.

  As shown in FIG. 23, in this modification, an adhesive region E is provided around the four lens portions La (concave optical surface IM1b). Further, the adhesion area E includes an adhesion area E1 (first adhesion area E1) provided between the lens portions La and another adhesion area E2 (second adhesion area E2).

  In this modification, an example in which the dropping amount of the adhesive 2 is changed as the dropping condition will be described.

  Specifically, as shown in FIG. 24, the amount of the adhesive 2a dropped on the first adhesive region E1 is larger than the amount of the adhesive 2b dropped on the second adhesive region E2. The dropping device (not shown) drops the adhesives 2a and 2b to the first lens array IM1 at a plurality of locations.

  After the adhesives 2a and 2b are dropped in this way, when the other is pressed against one of the first lens array IM1 and the second lens array IM2, the amount of the adhesive 2 is as shown in FIG. The adhesive 2a is connected in order from the large area E1, and spreads while being connected along the circumference of the concave optical surface IM1b. As the adhesives 2a and 2b spread on the surface IM1a in this way, the gas in the space formed by the concave optical surface IM1b and the concave optical surface IM2b is a portion where the adhesives 2a and 2b are not connected (FIG. Escape from the direction of the arrow (25). At this time, the adhesives 2a in the region E1 are already connected to each other, and the portion where the adhesive 2a is connected is pushed away by the gas so that the spaces around the adjacent lens parts do not communicate with each other. Accordingly, the spaces formed by the concave optical surface IM1b and the concave optical surface IM2b are not connected to each other, and a sealed space S in which each lens portion La is sealed is formed (see FIG. 26).

  That is, in the dropping step, the amount of adhesive dropped onto the first adhesive region set at a position corresponding to the plurality of lens portions is made different from the amount of adhesive dropped onto the other second adhesive region. Also in the sealing space step, the plurality of adhesives in the first adhesive region can be connected before the plurality of adhesives in the second adhesive region when the lens array and the opposing member are pressed. it can. For this reason, the adhesive dripped between the plurality of lens portions is not prevented from being pushed and connected by the gas escaping from the space formed for each lens portion to the outside. Accordingly, it is possible to manufacture a lens unit and a lens array unit that have few sealing defects that cause an intrusion of cutting fluid or the like when being separated into pieces by cutting.

  In addition, as shown in FIG. 24, in this modification, the interval (p11) of the dropping position of the adhesive 2 in the first adhesive region E1 is the interval (p11) of the dropping position of the adhesive 2 in the second adhesive region E2. It is smaller than p2). Moreover, in this modification, the space | interval e1 of each adhesive agent 2 in 1st area | region E1 is smaller than the space | interval e2 of each adhesive agent 2 in 2nd area | region E2.

<Modification 2>
It is also possible to join the first lens array IM1 and the opposing member via the protrusions 6. Hereinafter, a configuration in which the first lens array IM1 includes the protrusions 6 will be described. In this modification, a plate-like member 7 is used as the opposing member. FIG. 27 is a side view of the first lens array IM1. 28 and 29 are views of one lens portion La of the first lens array IM1 as viewed from above. FIG. 30 is a view of the cemented first lens array IM1 and the plate-like member 7 as viewed from the side.

  As shown in FIGS. 27 and 28, the first lens array IM1 is provided with a protrusion 6. The protrusion 6 surrounds each of the plurality of lens portions La, and an adhesive region E is provided on the top 6a. The protrusion 6 is formed by integral molding with the first lens array IM1, for example, using a mold.

  Further, as shown in FIG. 27, the top 6a and the surface IM1a ′ are connected by an inclined surface 6b having a predetermined inclination angle. Therefore, when the first lens array IM1 and the plate-like member 7 are pressed in a state where the adhesive 2 is dropped on the top 6a of the first lens array IM1, gas is generated between the two adjacent adhesives 2. As shown in FIG. 29, the adhesive 2 dripped onto the top portion 6a does not spread in the radial direction of the top portion 6a. It spreads along. Thus, as shown in FIG. 30, the top part 6a of the projection part 6 and the plate-shaped member 7 are joined. In this case, the protrusion 6 (the inclined surface 6b) forms a side wall of the sealing space S. Instead of dropping the adhesive 2 on the upper surface of the protruding portion 6, the adhesive 2 may be dropped on a region on the opposing member to which the upper surface of the protruding portion 6 is bonded, or the adhesive 2 is applied to both. May be added dropwise.

  In this way, by providing the protrusion 6 and dropping the adhesive 2 onto at least one of the protrusion and the region on the opposing member to which the protrusion is bonded, the lens portion is placed in the middle of pressing. Since the surrounding space is sealed and the adhesive 2 can be prevented from being pierced by the internal gas, and the direction in which the adhesive 2 spreads can be controlled by the protrusion 6, the lens portion after pressing with a small amount or number of drops Can be surrounded by an adhesive. That is, when there is no protrusion 6, the spreading direction of the adhesive by pressing cannot be controlled. Therefore, in order to realize an annular adhesive region like the protrusion 6, a large number of small-diameter point adhesives are arranged in an annular shape. However, since the adhesive is guided by the protrusions 6 and spreads in an annular shape by providing the protrusions 6, the adhesive needs only a small number or amount of drops. Therefore, the time and process required for arranging the adhesive can be shortened. In addition, the adhesive 2 can be prevented from flowing into the sealed space due to the wet pinning effect. That is, the yield is improved.

  The inclination angle of the inclined surface 6b with respect to the top 6a is preferably close to 90 degrees. Further, the volume of the adhesive 2 dropped on the top 6a is equal to or less than the volume obtained from the area of the top 6a and the interval (the thickness of the adhesive layer) in the state where the first lens array IM1 and the plate-like member 7 are joined. It is desirable that

  In addition, the protrusion part 6 may be provided in the opposing member side. The protrusions 6 may be provided on both the first lens array IM1 and the opposing member as “first protrusions” and “second protrusions”. In this case, the top portion 6a of the first protrusion and the top portion 6a of the second protrusion are joined, so that the first protrusion (inclined surface 6b) and the second protrusion (inclined surface 6b) are sealed space S. The side wall is formed.

<Modification 3>
In the above embodiment, the structure of a monolithic glass molding lens made of a single material has been described as the lens array. However, a lens array made of a composite material in which a plurality of lens portions are formed on a substrate (for example, It is also possible to use a wafer lens.

  In the above embodiment, the configuration of the lens portions arranged in a two-dimensional matrix has been described, but the arrangement of the lens portions is not limited to this. For example, a staggered arrangement (a state in which the arrangement directions of a plurality of lens portions are obliquely crossed) may be used.

  Although the above embodiment has been described based on a lens array having four lens portions, the number of lens portions is not limited to four. It is also possible to use a lens array having a larger number of lens portions. In this case, when the two-dimensionally arranged lens portions are arranged in up to two rows and arranged in a matrix of 2 × n (where n ≧ 3), gas can be easily released. Even when the number of vertical and horizontal arrangements is 3 or more, the adhesive around the central lens portion may be connected before the adhesive around the peripheral lens portion. However, in this case, the arrangement of the adhesive is taken into consideration so that the gas in the space around the central lens portion does not break through the adhesive even if the pressure advances after the adhesive around the central lens portion is connected. It is necessary to keep. In any of these cases, the direction in which the gas in the space formed by the lens portions (or the lens portion and the opposing member) escapes can be controlled by changing the dropping position and the dropping amount of the adhesive 2. .

DESCRIPTION OF SYMBOLS 1 Lens unit 2 Adhesive 4 Bottom plate 5 Spacer 11 Core support member 12 Upper metal mold 12b Lower surface 13, 23 Core 13a, 23a Transfer surface 22 Lower mold 22b Upper surface NZ Platinum nozzle GL Glass IM1 1st lens array IM2 2nd lens array IM1a, IM2a Surface IM3 Lens array unit La, Lb Lens part JZ Jig DB Dicing blade IM1b, IM2b Concave optical surface IM1e, IM2e Convex optical surface E Adhesive region E1 First adhesive region E2 Second adhesive region

Claims (14)

A plurality of adhesives are applied to at least one of an adhesion region on the first lens array having a plurality of lens portions arranged two-dimensionally and an adhesion region on a facing member provided to face the first lens array. A dripping step for dripping on the point;
Both the adhesion regions are opposed to each other, and at least one of the first lens array and the facing member is pressed against the other to join the first lens array and the facing member, and the plurality of lens portions A sealed space forming step for forming a sealed space every time;
A cutting step of cutting the bonded first lens array and the facing member in units of the sealing space;
A method of manufacturing a lens unit comprising:
In the dropping step, the adhesive dripping condition for the first adhesive region set at a position corresponding to the position between the plurality of lens portions in the adhesive region, and the adhesion for the other second adhesive region. Different from the dripping conditions of the agent,
In the sealing space forming step, the plurality of adhesives in the first adhesive region are connected before the plurality of adhesives in the second adhesive region during the pressing. Method. The first lens array is provided with a protrusion that surrounds each of the plurality of lens portions and has the adhesive region on the top thereof.
2. The lens unit according to claim 1, wherein in the sealing space forming step, the protrusion forms a side wall of the sealing space by joining the top of the protrusion and the facing member. Manufacturing method. The opposing member is provided with a protrusion that surrounds each of the plurality of lens portions when joined to the first lens array and has the adhesive region on the top thereof.
The said projecting part forms the side wall of the said sealing space by the said 1st lens array and the top part of the said projecting part being joined in the said sealing space formation step. A manufacturing method of a lens unit. The first lens array includes a first protrusion that surrounds each of the plurality of lens portions and has the adhesive region on the top thereof.
The opposing member is provided with a second projecting portion that surrounds each of the plurality of lens portions and has the adhesive region at the top when joined to the first lens array,
In the sealing space forming step, the top of the first protrusion and the top of the second protrusion are joined, so that the first protrusion and the second protrusion form a side wall of the sealing space. The method of manufacturing a lens unit according to claim 1. An adhesive region on a first lens array having a plurality of two-dimensionally arranged lens portions, an adhesive region on a facing member provided to face the first lens array, and the opposing to the first lens array An adhesive region provided on both surfaces of the spacer substrate having a plurality of holes that are respectively accommodated with the plurality of lens portions when disposed between the first lens array and the first lens array; Adhering to at least one of the adhesion region of the first lens array and the adhesion region on one side of the spacer substrate and at least one of the adhesion region of the counter member and the adhesion region on the other surface side of the spacer substrate A dropping step of dropping the agent in a plurality of locations;
The adhesion region of the first lens array and the adhesion region on the one surface side of the spacer substrate are opposed to each other, at least one of the first lens array and the spacer substrate is pressed against the other, and the adhesion of the facing member The first lens array, the opposing member, and the spacer substrate are formed by causing the region and the adhesion region on the other surface side of the spacer substrate to face each other and pressing at least one of the opposing member and the spacer substrate against the other. Sealing space forming step for forming a sealing space for each of the plurality of lens parts,
A cutting step of cutting the bonded first lens array, the facing member, and the spacer substrate in units of the sealing space;
A method of manufacturing a lens unit comprising:
In the dropping step, the adhesive dripping condition for the first adhesive region at a position corresponding to the position between the plurality of lens portions in the adhesive region, and the adhesive dripping for the other second adhesive regions. Different from the conditions,
In the sealing space forming step, the plurality of adhesives in the first adhesive region are connected before the plurality of adhesives in the second adhesive region during the pressing. Method.   6. The lens unit according to claim 1, wherein, in the dripping step, an interval of the adhesive in the first adhesive region is made smaller than an interval of the adhesive in the second adhesive region. Manufacturing method. The dripping condition includes an interval of the dropping position of the adhesive,
The distance between the dropping positions of the adhesive dropped onto the first adhesive region and the distance between the dropping positions of the adhesive dropped onto the second adhesive region are changed. The manufacturing method of the lens unit in any one of 6. The first adhesion region includes a region surrounded by at least three of the lens units, and a region between two adjacent lens units,
The distance between the adhesives in a region surrounded by at least three lens parts is smaller than the distance between the adhesives in a region between two adjacent lens parts. A method for producing the lens unit according to 1. The dripping condition includes a dripping amount of the adhesive,
The amount of the adhesive dropped onto the first adhesive region and the amount of the adhesive dropped onto the second adhesive region are changed. A manufacturing method of the lens unit according to claim 1.   The method of manufacturing a lens unit according to claim 1, wherein the facing member is a plate-like member.   The method of manufacturing a lens unit according to claim 1, wherein the facing member is a second lens array having a plurality of lens portions arranged two-dimensionally. A plurality of adhesives are applied to at least one of an adhesion region on the first lens array having a plurality of lens portions arranged two-dimensionally and an adhesion region on a facing member provided to face the first lens array. A dripping step for dripping on the point;
Both the adhesion regions are opposed to each other, and at least one of the first lens array and the facing member is pressed against the other to join the first lens array and the facing member, and the plurality of lens portions A sealed space forming step for forming a sealed space every time;
A method of manufacturing a lens array unit having
In the dropping step, the adhesive dripping condition for the first adhesive region set at a position corresponding to the position between the plurality of lens portions in the adhesive region, and the adhesion for the other second adhesive region. Different from the dripping conditions of the agent,
In the sealing space forming step, the plurality of adhesives in the first adhesive region are connected before the plurality of adhesives in the second adhesive region during the pressing. Production method. An adhesive region on a first lens array having a plurality of two-dimensionally arranged lens portions, an adhesive region on a facing member provided to face the first lens array, and the opposing to the first lens array An adhesive region provided on both surfaces of the spacer substrate having a plurality of holes that are respectively accommodated with the plurality of lens portions when disposed between the first lens array and the first lens array; Adhering to at least one of the adhesion region of the first lens array and the adhesion region on one side of the spacer substrate and at least one of the adhesion region of the counter member and the adhesion region on the other surface side of the spacer substrate A dropping step of dropping the agent in a plurality of locations;
The adhesion region of the first lens array and the adhesion region on the one surface side of the spacer substrate are opposed to each other, at least one of the first lens array and the spacer substrate is pressed against the other, and the adhesion of the facing member The first lens array, the opposing member, and the spacer substrate are formed by causing the region and the adhesion region on the other surface side of the spacer substrate to face each other and pressing at least one of the opposing member and the spacer substrate against the other. Sealing space forming step for forming a sealing space for each of the plurality of lens parts,
A method of manufacturing a lens array unit having
In the dropping step, the adhesive dripping condition for the first adhesive region at a position corresponding to the position between the plurality of lens portions in the adhesive region, and the adhesive dripping for the other second adhesive regions. Different from the conditions,
In the sealing space forming step, the plurality of adhesives in the first adhesive region are connected before the plurality of adhesives in the second adhesive region during the pressing. Production method.   14. The method of manufacturing a lens array unit according to claim 12, wherein, in the dropping step, an interval of the adhesive in the first adhesive region is made smaller than an interval of the adhesive in the second adhesive region. .