Optical device manufacturing method

Abstract

To suppress the clearance between an optical member and a substrate from varying in one direction, as compared with the case where the optical member is contacted with a positioning part that is formed in a housing and, while being in this state, the optical member is fixed to the housing using an adhesive.SOLUTION: A method for manufacturing an optical device includes: a step in which a vertical part of a jig whose cross section is in a shape of a letter T and that extends in one direction is inserted into a hole of a housing that has a plane extending in the one direction and a hole that is sandwiched by the plane as seen from an intersection direction that intersects the one direction and that extends in the one direction penetrating in the intersection direction, both ends of a lateral part of the jig are contacted with the plane; a step in which an optical member is placed at a tip of the vertical part and the optical member is fixed to the housing while the optical member and the housing are pressed against the jig; and a step in which a substrate on which an optical element is mounted, is fixed to the plane, with the optical element and the optical member facing each other.SELECTED DRAWING: Figure 22

Description

[Technical Field]

[0001] The present invention relates to a method for manufacturing an optical device. [Background technology]

[0002] The image reading device described in Patent Document 1 uses a measuring instrument and a support mechanism when fixing the lens array and photodetector array that constitute the 1x optical system along the longitudinal direction of the frame, and places the support mechanism at three locations along the longitudinal direction of the frame: at the central position and its symmetrical positions.Based on the amount of warping along the optical axis of the frame measured by the measuring instrument, the support mechanism adjusts the curvature of the lens array so that the distance from the object surface to the top surface of the lens array and the distance from the imaging surface of the photodetector array to the bottom surface of the lens array are equal at each of the symmetrical positions on the frame and the central position of the frame. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-182758 Summary of the Invention [Problem to be solved by the invention]

[0004] Conventionally, when fixing an optical element (lens array) and a substrate extending in one direction to a housing extending in one direction, the optical element is brought into contact with a positioning portion formed on the housing, and in this state the optical element is fixed to the housing using an adhesive.

[0005] In such a fixing, if the optical member is warped in one direction, the distance between the optical member and the substrate will vary in one direction when the optical member and the substrate are fixed to the housing.

[0006] The present disclosure aims to provide a method for manufacturing an optical device that can suppress variation in the distance between an optical element and a substrate in one direction, compared to when an optical element is brought into contact with a positioning portion formed on a housing and, in this state, the optical element is fixed to the housing using an adhesive. [Means for solving the problem]

[0007] A manufacturing method for an optical device according to a first aspect of the present disclosure is characterized by comprising the steps of: inserting a vertical portion of a jig having a T-shaped cross section and extending in one direction into a hole in a housing that is sandwiched between a surface extending in one direction and a cross direction that crosses the one direction, and that penetrates the cross direction and extends in the one direction, and bringing both ends of the horizontal portion into contact with the surface; placing an optical element on the tip of the vertical portion, and fixing the optical element to the housing while pressing the optical element and the housing against the jig; and fixing a substrate on which an optical element is mounted to the surface with the optical element and the optical element facing each other.

[0008] A manufacturing method for an optical device according to a second aspect of the present disclosure is characterized by comprising the steps of: inserting a vertical portion of a jig having a T-shaped cross section extending in one direction into a hole of a housing having a surface extending in one direction and a hole sandwiched between the surface when viewed from a cross direction intersecting the one direction and penetrating the cross direction to extend in the one direction, and bringing both ends of the horizontal portion into contact with the surface; placing an optical element and a light-shielding element in this order on the tip of the vertical portion, pressing the optical element against the jig via the light-shielding element, and fixing the optical element to the housing while the housing is pressed against the jig; and fixing a substrate on which a light-receiving element is mounted to the surface with the light-receiving element and the optical element facing each other.

[0009] A manufacturing method for an optical device according to a third aspect of the present disclosure is characterized in that, in the manufacturing method for an optical device described in the first or second aspect, the optical element has a plurality of convex lens surfaces aligned in one direction and a light-shielding film surrounding the lens surfaces, and the vertical portion of the jig has a contact portion formed thereon that comes into contact with a portion of the optical element other than the lens surfaces and the light-shielding film when the optical element is placed on the tip of the vertical portion.

[0010] A fourth aspect of the present disclosure relates to a method for manufacturing an optical device, and is characterized in that, in the method for manufacturing an optical device described in the third aspect, the contact portions of the jig are provided in pairs so that the lens surface and the light-shielding film are positioned therebetween in the one direction and in another intersecting direction that intersects with the intersecting direction.

[0011] A manufacturing method for an optical device according to a fifth aspect of the present disclosure is characterized in that, in the manufacturing method for an optical device described in any one of the first to fourth aspects, the housing is formed with a pair of clamping portions that clamp the vertical portion from the one direction and another intersecting direction that intersects with the intersecting direction when the vertical portion is inserted into the hole, and the vertical portion is clamped by the clamping portions when the vertical portion is inserted into the hole.

[0012] A sixth aspect of the present disclosure provides a method for manufacturing an optical device according to the fifth aspect, wherein the clamping portion clamps the vertical portion with a surface.

[0013] A seventh aspect of the present disclosure relates to a method for manufacturing an optical device, and is characterized in that, in the method for manufacturing an optical device of any one of the first to sixth aspects, the vertical portions of the jig are provided in a plurality of positions spaced apart in the one direction, and in the step of fixing the optical element while pressing the optical element and the housing against the jig, the portion of the optical element placed on the tip of the vertical portion is pressed against the jig in the one direction.

[0014] An eighth aspect of the present disclosure is a method for manufacturing an optical device according to the seventh aspect, characterized in that a plurality of pressing portions are provided to press the optical element against the jig, and in the step of fixing the optical element while pressing the optical element against the jig, the pressing forces of the plurality of pressing portions are individually adjusted in accordance with the warping tendency of the optical element. [Effects of the Invention]

[0015] The manufacturing method for an optical device according to the first aspect of the present disclosure can suppress variation in the distance between the optical element and the substrate in one direction, compared to when the optical element is brought into contact with a positioning portion formed on the housing and then fixed to the housing using adhesive in this state.

[0016] The manufacturing method for an optical device according to the second aspect of the present disclosure can suppress variation in the distance between the optical element and the substrate in one direction, compared to when the optical element is brought into contact with a positioning portion formed on the housing and then fixed to the housing using adhesive in this state.

[0017] The method for manufacturing an optical device according to the third aspect of the present disclosure can prevent the lens surface and the light-shielding film from being damaged, compared to when the contact portion comes into contact with the lens surface and the light-shielding film.

[0018] In the method for manufacturing an optical device according to the fourth aspect of the present disclosure, the position of the optical member relative to the jig is stable compared to when the contact portion of the vertical portion contacts only one side of the lens surface and the light-shielding film.

[0019] The method for manufacturing an optical device according to the fifth aspect of the present disclosure can suppress variations in the relative position between the housing and the jig, compared to when the vertical portion is spaced apart from the housing in other intersecting directions.

[0020] The method for manufacturing an optical device according to the sixth aspect of the present disclosure can suppress variations in the relative position between the housing and the jig, compared to when the clamping portion clamps the vertical portion at one point.

[0021] The manufacturing method for an optical device according to the seventh aspect of the present disclosure can effectively press the optical element against the jig, compared to when a part of the optical element other than the part placed on the tip of the vertical portion is pressed against the jig.

[0022] The manufacturing method for an optical device according to the eighth aspect of the present disclosure can effectively suppress variation in the distance between the optical element and the substrate in one direction when the optical element has a tendency to warp, compared to when the pressing forces of the multiple pressing portions are all the same. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a schematic configuration diagram showing an image forming apparatus including an image reading device manufactured by a manufacturing method for an optical device according to an embodiment of the present disclosure. [Figure 2] 1 is a schematic configuration diagram showing an image reading unit including an image reading device manufactured by a manufacturing method for an optical device according to an embodiment of the present disclosure. [Figure 3] 1 is a perspective view showing an image reading device manufactured by a manufacturing method for an optical device according to an embodiment of the present disclosure. [Figure 4] 1 is an overall perspective view showing an image reading device manufactured by a manufacturing method for an optical device according to an embodiment of the present disclosure; [Figure 5] 1 is an enlarged cross-sectional view showing an image reading device manufactured by a manufacturing method for an optical device according to an embodiment of the present disclosure. [Figure 6] 10A and 10B are operational diagrams illustrating the operation of an image reading unit including an image reading device manufactured by a manufacturing method for an optical device according to an embodiment of the present disclosure. [Figure 7] 1 is a perspective view showing an image reading device manufactured by a manufacturing method for an optical device according to an embodiment of the present disclosure. [Figure 8] 1 is an exploded perspective view showing an image reading device manufactured by a manufacturing method for an optical device according to an embodiment of the present disclosure. [Figure 9] 1 is a cross-sectional view of an image reading device manufactured by a manufacturing method for an optical device according to an embodiment of the present disclosure, taken in a direction perpendicular to the longitudinal direction. [Figure 10] 1 is a cross-sectional view taken along the longitudinal direction of an image reading device manufactured by a manufacturing method for an optical device according to an embodiment of the present disclosure. [Figure 11] 1 is an enlarged cross-sectional view of an image reading device manufactured by a manufacturing method for an optical device according to an embodiment of the present disclosure, taken in a direction perpendicular to the longitudinal direction; [Figure 12]1 is an enlarged perspective view showing a microlens array provided in an image reading device manufactured by a manufacturing method for an optical device according to an embodiment of the present disclosure. [Figure 13] 1 is an exploded perspective view showing a light collecting unit provided in an image reading device manufactured by a manufacturing method for an optical device according to an embodiment of the present disclosure. [Figure 14] 1 is an enlarged plan view showing a microlens array provided in an image reading device manufactured by a manufacturing method for an optical device according to an embodiment of the present disclosure. [Figure 15] 1 is a perspective view showing a light collecting unit provided in an image reading device manufactured by a manufacturing method for an optical device according to an embodiment of the present disclosure. [Figure 16] 1 is a plan view showing a light blocking member provided in an image reading device manufactured by a manufacturing method for an optical device according to an embodiment of the present disclosure. [Figure 17] 10 is an enlarged plan view showing a light-blocking portion provided in an image reading device manufactured by a manufacturing method for an optical device according to an embodiment of the present disclosure. [Figure 18] 1A and 1B are a plan view and a side view showing the entire light-blocking section provided in an image reading device manufactured by a manufacturing method for an optical device according to an embodiment of the present disclosure. [Figure 19] FIG. 10 is a perspective view showing the configuration of a jig, a pressing unit, and the like used in a manufacturing method for an optical device according to an embodiment of the present disclosure. [Figure 20] 10 is a cross-sectional view illustrating a state in which a jig is installed on a housing in a manufacturing method of an optical device according to an embodiment of the present disclosure. [Figure 21] 10 is a cross-sectional view illustrating a state in which a light collecting portion is brought into contact with a jig in a manufacturing method of an optical device according to an embodiment of the present disclosure. [Figure 22] 10 is a cross-sectional view illustrating a state in which a light collecting portion is pressed against a jig in a manufacturing method of an optical device according to an embodiment of the present disclosure. [Figure 23] 10 is a cross-sectional view illustrating a state in which a light collecting unit is fixed to a housing using an adhesive in a manufacturing method of an optical device according to an embodiment of the present disclosure. FIG. [Figure 24]10A and 10B are cross-sectional views illustrating a state in which a substrate is fixed to a housing in a manufacturing method for an optical device according to an embodiment of the present disclosure. [Figure 25] 10A and 10B are cross-sectional views showing modified forms of an image reading device manufactured by a manufacturing method for an optical device according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0024] An example of a method for manufacturing an optical device according to an embodiment of the present disclosure will be described with reference to Figures 1 to 25. First, an image forming apparatus 10 including an image reading device 100 manufactured by the method for manufacturing an optical device will be described.

[0025] In the figure, arrow H indicates the up-down direction (vertical direction) of the device, arrow W indicates the width direction (horizontal direction) of the device, and arrow D indicates the depth direction (horizontal direction) of the device. The up-down direction, width direction, and depth direction of the device are perpendicular to each other. The up-down direction of the device may also be referred to as the up-down direction.

[0026] (Overall configuration of image forming apparatus 10) As shown in FIG. 1, the image forming apparatus 10 of this embodiment is equipped with, from bottom to top in the vertical direction (direction of arrow H), a storage section 14 in which a sheet material P as a recording medium is stored, a transport section 16 that transports the sheet material P stored in the storage section 14, an image forming section 20 that forms an image on the sheet material P transported from the storage section 14 by the transport section 16, and an image reading unit 60 that reads the image formed on the document G, in this order.

[0027] [Storage section 14] The storage unit 14 is provided with a storage member 26 that can be pulled out from the housing 10a of the image forming apparatus 10 toward the front in the device depth direction, and sheet materials P are stacked on this storage member 26. Furthermore, the storage unit 14 is provided with a delivery roll 30 that sends out the topmost sheet material P stacked in the storage member 26 to a conveyance path 28 for the sheet materials P.

[0028] [Transport unit 16] The conveying section 16 is provided with a plurality of conveying rolls 32 that convey the sheet member P along the conveying path .

[0029] [Image forming unit 20] The image forming section 20 is provided with four image forming units 18Y, 18M, 18C, and 18K for yellow (Y), magenta (M), cyan (C), and black (K). In the following description, when there is no need to distinguish between Y, M, C, and K, the terms Y, M, C, and K may be omitted.

[0030] The image forming units 18 for each color are detachably attached to the housing 10a. Each image forming unit 18 for each color includes an image carrier 36, a charging roll 38 that charges the surface of the image carrier 36, and an exposure device 42 that irradiates the charged image carrier 36 with exposure light. Each image forming unit 18 for each color also includes a developing device 40 that develops the electrostatic latent image formed by the exposure device 42 exposing the charged image carrier 36 to light, and visualizes the electrostatic latent image as a toner image.

[0031] The image forming unit 20 also includes an endless transfer belt 22 that rotates in the direction of arrow A in the figure, and a primary transfer roll 44 that transfers toner images formed by the image forming units 18 of each color onto the transfer belt 22. The image forming unit 20 also includes a secondary transfer roll 46 that transfers the toner images transferred onto the transfer belt 22 onto a sheet member P, and a fixing device 50 that applies heat and pressure to the sheet member P onto which the toner images have been transferred to fix the toner images onto the sheet member P.

[0032] [Image reading unit 60] 2, the image reading unit 60 includes a first transparent plate 62 (so-called platen glass) on which a sheet of original G is placed when the image of the original G is read, and a second transparent plate 72 disposed on one side of the first transparent plate 62 in the device width direction (left side in the figure). The first transparent plate 62 and the second transparent plate 72 are fitted into the upper part of a housing 60a of the image reading unit 60.

[0033] An opening / closing cover 66 that opens and closes the first transparent plate 62 and the second transparent plate 72 is disposed above the first transparent plate 62 and the second transparent plate 72. Inside the opening / closing cover 66, a transport device 64 (a so-called ADF device) is provided that transports multiple sheets of document G along a transport path 70 inside the opening / closing cover 66 and passes the document G through a document reading position R above the second transparent plate 72.

[0034] Also provided inside the housing 60a is an image reading device 100 that reads an image of the document G placed on the first transparent plate 62 and an image of the document G transported to the document reading position R by the transport device 64. Furthermore, the image reading unit 60 is provided with a drive device 74 that drives the image reading device 100 in the device width direction. The image reading device 100 is an example of an optical device. The image reading device 100 will be described in detail later.

[0035] As shown in Figures 2 and 3, the drive device 74 includes a shaft 76 extending in the device width direction (the direction of movement of the image reading device 100), and a sliding member 78 attached to the underside of the housing 114 of the image reading device 100 and slidably supported on the shaft 76.

[0036] Furthermore, the drive device 74 includes a motor 80, a drive pulley 84 that is rotated by the driving force transmitted from the motor 80, a driven pulley 86 that rotates in response to the motor 80, and an endless belt 82 that is wound around the drive pulley 84 and the driven pulley 86. The drive pulley 84 is attached to one end of the shaft 76, and the driven pulley 86 is attached to the other end of the shaft 76.

[0037] As shown in Fig. 4, the sliding member 78 is attached to a central portion in the depth direction of the device on the underside of the housing 114. As shown in Fig. 5, the sliding member 78 is formed with a slit 78a that extends in the vertical direction and into which a part of the endless belt 82 is fitted, and a sliding surface 78b that is semicircular when viewed from the width direction of the device and slides against the shaft 76.

[0038] As shown in FIG. 4, the housing 60a is integrally formed with a pair of support portions 90 that support both end portions of the shaft 76 from below.

[0039] In this configuration, when reading an image of the document G conveyed by the conveying device 64, the driving force of the motor 80 (see FIG. 4) is transmitted to the image reading device 100 via the endless belt 82, and the image reading device 100 moves to a conveying and reading position on the end side in the device width direction and stops, as shown in FIG. 6. Then, the image reading device 100 arranged at the conveying and reading position reads an image of the document G conveyed by the conveying device 64.

[0040] 2, when reading an image of the original G placed on the first transparent plate 62, the image reading device 100, which is placed at the reading start position (solid line in the figure), moves in the device width direction along the first transparent plate 62 toward the reading end position (chain double-dashed line in the figure) while reading the image of the original G. In this way, the image reading device 100 reads the image of the original G placed on the first transparent plate 62.

[0041] (Image reading device 100) Next, the image reading device 100 will be described in detail. The image reading device 100 shown in Fig. 7 reads an image formed on an original G (object) using a known CIS (Contact Image Sensor) method. As shown in Fig. 8, the image reading device 100 includes a light receiving substrate 102, a pair of wiring cables 104 connected to the light receiving substrate 102, and rigid substrates 106 connected to the respective wiring cables 104. The image reading device 100 also includes a light emitting element 128 mounted on the rigid substrate 106, a pair of cylindrical light guides 110 (so-called light guides), a light collecting unit 112 that collects light reflected from the original G, and a housing 114. The image reading device 100 also includes a glass plate 122 that covers the top surface of the housing 114.

[0042] [Housing 114] As shown in FIG. 8, the housing 114 extends in the device depth direction, and has upward-facing stepped surfaces 118 formed on both sides in the device width direction. As shown in FIG. 9, the housing 114 is formed with a pair of light guide housings 114a in which a pair of light guides 110 are respectively housed, and a lens housing 114b in which the light condensing section 112 is housed, between the pair of light guide housings 114a. Furthermore, as shown in FIG. 10, the housing 114 is formed with a pair of substrate housings 114c in which rigid substrates 106 are housed, sandwiching the light guide housing 114a from the device depth direction. While FIG. 10 shows a cross-sectional view (a cross-sectional view cut along the longitudinal direction) of one end of the image reading device 100 in the longitudinal direction (device depth direction), a cross-sectional view of the image reading device 100 at the other end in the longitudinal direction has the same configuration. That is, the cross-sectional view of the other end of the image reading device 100 in the longitudinal direction is a mirror image of FIG.

[0043] -Light guide housing portion 114a- As shown in Fig. 9, a pair of light guide housing portions 114a are formed side by side in the width direction of the device, and each light guide housing portion 114a extends in the depth direction of the device, as shown in Fig. 10. Furthermore, the cross section of each light guide housing portion 114a intersecting the longitudinal direction is U-shaped with an open upper portion.

[0044] -Lens housing section 114b- As shown in Fig. 9, the lens housing portion 114b is formed between the pair of light guide housing portions 114a in the device width direction and penetrates a part of the housing 114 in the vertical direction. The lens housing portion 114b has a pair of upward surfaces 116 that face the ends of the lower surface of the light condensing portion 112 in the device width direction in the vertical direction. Note that in the enlarged view shown in the lower left of Fig. 9, the ends of the lower surface of the light condensing portion 112 in the device width direction and the upward surfaces 116 appear to be in contact, but in reality they are not in contact. In other words, there is a slight gap between the ends of the lower surface of the light condensing portion 112 in the device width direction and the upward surfaces 116.

[0045] -Substrate accommodating section 114c- 10, a pair of substrate accommodating portions 114c are formed on the rear side and the front side of the light guide accommodating portion 114a in the device depth direction. Specifically, the substrate accommodating portions 114c are formed between the wall portions 119 on both ends of the housing 114 in the device depth direction and the light guide accommodating portion 114a.

[0046] -others- 9 and 10, a step 115 is formed on the upper part of the housing 114, supporting the edge of the glass plate 122 from below. Also, a countersunk surface 117 is formed on the lower part of the housing 114, as shown in FIG. 9, and is in contact with the upper surface of the light-receiving substrate 102.

[0047] Further, below the lens housing portion 114b, an open portion 120 that is open downward is formed, and the open portion 120 expands in the device width direction via a pair of step surfaces 120a. The open portion 120 between the step surfaces 120a and the lens housing portion 114b is formed as a through-hole 120b with a rectangular cross section that extends in the up-down direction. This through-hole 120b is formed in the housing 114 and between a pair of opposing surfaces 120c that face each other in the device width direction. The countersunk surface 117 is an example of a surface, the through-hole 120b is an example of a hole, and the opposing surfaces 120c are an example of a clamping portion.

[0048] [Light guide 110] 9, the light guide 110 is housed in a light guide housing portion 114a of the housing 114, and is formed of a transparent material (for example, acrylic resin) in a cylindrical shape extending in the depth direction of the device. A pair of light guides 110 are provided side by side in the width direction of the device.

[0049] The light guide 110 has a longitudinal center portion fixed to the housing 114 by a fixing portion (not shown) so that both longitudinal ends can expand and contract in the device depth direction. With the longitudinal center portion of the light guide 110 fixed to the housing 114, an end face 110a of the light guide 110 and an LED 128 disposed inside a wall portion 119 of the housing 114 are spaced apart in the device depth direction (see FIG. 10 ). Specifically, the end face 110a of the light guide 110 and the LED 128 are spaced apart so as not to come into contact with each other even if the light guide 110 extends in the device depth direction due to a temperature change. In other words, the gap between the end face 110a of the light guide 110 and the LED 128 is set to a dimension such that the end face 110a and the LED 128 do not come into contact with each other even if the light guide 110 extends in the device depth direction due to a temperature change.

[0050] In addition, a reflective member (not shown) is provided along the longitudinal direction of the light guide 110, which emits light that enters from the end surface 110a of the light guide 110 and travels in the longitudinal direction of the light guide 110 toward above the light-concentrating section 112 (in the direction of arrow B in Figure 9).

[0051] [Light collecting section 112] 9, the light collecting unit 112 is housed in a lens housing portion 114b of the housing 114. The light collecting unit 112 has a rectangular parallelepiped shape extending in the depth direction of the device, and includes a light blocking member 150 and a pair of microlens arrays 152 (hereinafter referred to as "lens arrays 152").

[0052] Furthermore, both ends of the lower surface of the light collecting unit 112 in the device width direction face a pair of upward surfaces 116 of the housing 114 at a distance in the vertical direction. The light collecting unit 112 is fixed to the housing 114 using adhesive 240 (see FIG. 23). In this state, both ends of the light collecting unit 112 in the longitudinal direction and the inner surfaces of the wall portions 119 of the housing 114 are spaced apart in the device depth direction (see FIG. 10). The light collecting unit 112 will be described in detail later.

[0053] [Light receiving substrate 102] 9, the light receiving substrate 102 has its thickness direction aligned in the vertical direction and is disposed at the lower end of the housing 114. The light receiving substrate 102 is fixed to the housing 114 using adhesive 242 (see FIG. 24) with the upper surface of the light receiving substrate 102 in contact with the countersunk surface 117 of the housing 114. The light receiving substrate 102 is an example of a substrate.

[0054] The light receiving substrate 102 has a rectangular shape extending in the depth direction of the device when viewed from above. A plurality of light receiving elements 126 are mounted on the upper surface of the light receiving substrate 102 and aligned in the depth direction of the device. The light receiving elements 126 mounted on the light receiving substrate 102 face the light condensing unit 112 in the vertical direction (see FIG. 9). The light receiving elements 126 are an example of an optical element.

[0055] [Wiring cable 104] 8, the wiring cables 104 are so-called flexible flat cables whose base ends are connected to both end portions of the light receiving substrate 102 in the device depth direction. The base end of one wiring cable 104 is connected to the end portion of the light receiving substrate 102 on the rear side in the device depth direction (left side in the figure), and the base end of the other wiring cable 104 is connected to the end portion of the light receiving substrate 102 on the front side in the device depth direction (right side in the figure).

[0056] [Rigid substrate 106] 8, a pair of rigid substrates 106 are provided, and are connected to the ends of the distribution cables 104, and are rectangular in shape extending in the width direction of the device when viewed from the depth direction of the device. Furthermore, two LEDs (Light Emitting Diodes) 128 (hereinafter referred to as "light-emitting elements 128") are mounted on one surface (opposite surfaces) of each rigid substrate 106 and aligned in the width direction of the device.

[0057] As shown in FIG. 10, the rigid substrate 106 is accommodated in a substrate accommodating portion 114c of the housing 114 in a state where it faces an end surface 110a of the light guide 110.

[0058] [Glass plate 122] As shown in Fig. 8, the glass plate 122 has a thickness direction in the up-down direction and a rectangular shape extending in the depth direction of the device when viewed from above. As shown in Fig. 9, the glass plate 122 is fixed to the housing 114 by a fixing means (not shown) with the edge of the glass plate 122 in contact with the step portion 115 of the housing 114, and is disposed so as to cover the upper surface of the housing 114.

[0059] (Configuration of light collecting section 112) Next, the light collecting unit 112 will be described. As shown in Fig. 9 and Fig. 11, the light collecting unit 112 includes a light blocking member 150 and a pair of lens arrays 152. The light blocking member 150, one lens array 152, and the other lens array 152 are arranged in this order from the glass plate 122 side to the light receiving substrate 102 side. The one lens array 152, the other lens array 152, and the light blocking member 150 are fixed using an adhesive (not shown). The lens array 152 is an example of an optical member.

[0060] [Lens array 152] The lens array 152 is integrally formed using, for example, a transparent resin material such as polymethyl methacrylate (PMMA) and has a rectangular parallelepiped shape extending in the device depth direction. As shown in Figures 12 and 13, the lens array 152 has a rectangular upper surface 152a that faces upward and extends in the device depth direction when viewed from above, and a rectangular lower surface 152b that faces downward and extends in the device depth direction when viewed from below.

[0061] Furthermore, the lens array 152 has protrusions 154 formed on both end edges of the upper surface 152a in the device width direction, extending in the device depth direction and protruding upward, and protrusions 156 formed on both end edges of the lower surface 152b in the device width direction, extending in the device depth direction and protruding downward.

[0062] Furthermore, a plurality of lens surfaces 158 are formed on the upper surface 152a and the lower surface 152b, protruding from the upper surface 152a or the lower surface 152b, respectively. The amount of protrusion of the lens surfaces 158 is smaller than the amount of protrusion of the protrusions 154, 156.

[0063] These lens surfaces 158 are arranged in two staggered rows along the depth direction of the device (see FIG. 14). Here, staggered means alternately. Furthermore, in the vertical direction of the device, lens surfaces 158 formed on upper surface 152a and lens surfaces 158 formed on lower surface 152b are arranged at equal or similar positions. In other words, the lens axis (optical axis) of lens surface 158 formed on upper surface 152a and the lens axis (optical axis) of lens surface 158 formed on lower surface 152b overlap, and this pair of lens surfaces 158 forms microlenses 164.

[0064] 14, a light-shielding film 162 that suppresses light transmission is formed on the upper surface 152a and the lower surface 152b. Specifically, the light-shielding film 162 is formed so as to surround the lens surface 158 and to be spaced apart from the protrusions 154 and 156 in the device width direction (hatched portion in FIG. 14).

[0065] In this configuration, as shown in FIGS. 13 and 15 , the tops of the protrusions 154, 156 of the lens arrays 152 are butted together so that the optical axes of the microlenses 164 of one lens array 152 overlap with the optical axes of the microlenses 164 of the other lens array 152. Each (pair of) lens arrays 152 is fixed in this state using a fixing member such as an adhesive (not shown). Here, the term "one lens array 152" refers to the upper lens array 152, i.e., the lens array 152 located on the upper side of the paper in FIGS. 13 and 15 . The term "the other lens array 152" refers to the lower lens array 152, i.e., the lens array 152 located on the lower side of the paper in FIGS. 13 and 15 . The light-shielding film 162 is formed by applying black paint using, for example, an inkjet method. The light-shielding film 162 may be formed only on the upper surface 152a of one lens array 152 and the lower surface 152b of the other lens array 152 of a pair of lens arrays 152 fixed by a fixing member. In other words, the light-shielding film 162 does not have to be formed on the opposing surfaces of the pair of lens arrays 152 fixed by a fixing member (the lower surface 152b of one lens array 152 and the upper surface 152a of the other lens array 152).

[0066] [Light blocking member 150] 16 and 17, the light blocking member 150 extends in the depth direction of the device, and a plurality of circular through holes 170 that penetrate in the up-down direction of the device are formed in the light blocking member 150. This light blocking member 150 is a member that reduces light in a direction inclined with respect to the axial direction of the through holes 170 by allowing light to pass through the through holes 170.

[0067] The through holes 170 are arranged in two staggered rows along the depth direction of the device. Specifically, the through holes 170 are arranged at equal or similar intervals along the depth direction of the device. Two rows of the through holes 170 are provided, arranged along the depth direction of the device. Furthermore, the positions of the through holes 170 in one row and the through holes 170 in the other row in the depth direction of the device are offset from each other. In other words, two rows of the through holes 170 extending in the up-down direction of the device and arranged side by side in the depth direction of the device are formed in the width direction of the device.

[0068] As a result, the plurality of through holes 170 when viewed from above overlap with the plurality of microlenses 164 (see FIG. 12) formed on the lens array 152 when viewed from above.

[0069] The light blocking member 150 is configured by fixing six light blocking sections 160 extending in the depth direction of the device using an adhesive or the like while lining up in the depth direction of the device.

[0070] -Light blocking part 160- The light-shielding portion 160 is integrally molded from a black resin material (for example, acrylonitrile-butadiene-styrene copolymer resin (ABS resin)). In this embodiment, as an example, the length of the light-shielding portion 160 shown in Fig. 18(A) in the device depth direction (L2 in Fig. 18(A)) is 56 mm, and the thickness in the up-down direction (T1 in Fig. 18(B)) is 5 mm.

[0071] 18(A), a through-hole 170 is formed in the light-shielding portion 160, and two semicircular grooves 172 extending in the vertical direction of the device are formed at each end of the light-shielding portion 160 in the device depth direction. When the light-shielding portions 160 are lined up and joined in the device depth direction, adjacent grooves 172 face each other, thereby forming one through-hole 170.

[0072] Furthermore, this shading portion 160 has a base portion 160a extending in the depth direction of the device, and protruding portions 160b arranged at the center and both ends of the shading portion 160 in the depth direction of the device and protruding on both sides in the width direction of the device relative to the base portion 160a.

[0073] In this configuration, light reflected from the document G passes through the through-holes 170 formed in the light blocking member 150 and enters the microlenses 164 of one of the lens arrays 152, as shown in FIG.

[0074] Of the reflected light passing through through-hole 170, light that is tilted with respect to the vertical direction of the device may be reflected once by the inner surface of through-hole 170 in light-shielding section 160 and enter microlens 164. However, light that enters through-hole 170 at a large tilt angle is repeatedly reflected by the inner surface of through-hole 170 multiple times, thereby repeatedly attenuating the amount of light, and therefore, even if it does enter microlens 164, the amount of light will be negligible. In this way, stray light with a large amount of light is prevented from entering microlens 164.

[0075] Then, light incident on a microlens 164 of one lens array 152 exits from the microlens 164 of the one lens array 152 and enters a microlens 164 of the other lens array 152. Light incident on a microlens 164 of the other lens array 152 exits from the microlens 164 of the other lens array 152 and is collected (focused) on the light receiving element 126. If the position where the top of the protrusion 156 of one lens array 152 and the top of the protrusion 154 of the other lens array 152 are butted is defined as the butt position, Fig. 9 illustrates a configuration in which the distance from the butt position to the light receiving element 126 is longer than the distance from the butt position to the document G. However, Fig. 9 is merely an explanatory diagram, and in reality, the distance from the butt position to the document G and the distance from the butt position to the light receiving element 126 are the same, equivalent, or similar. The distance from the butt position to the document G in Fig. 9 may be longer (greater) than the distance from the butt position to the light receiving element 126.

[0076] (Function of image reading device 100) Next, the operation of the image reading device 100 will be described. 10 irradiates light onto the end surface 110a of the light guide 110. Furthermore, the light guide 110 guides the light incident from the end surface 110a of the light guide 110 in the longitudinal direction of the light guide 110. Then, as shown in FIG. 9, the light guide 110 emits the light toward above the light collecting portion 112 (in the direction of arrow B in the figure).

[0077] Furthermore, the light emitted from the light guide 110 is irradiated onto the document G, and the reflected light reflected from the document G passes through the through hole 170 formed in the light-shielding member 150 and enters the microlens 164 (see Figure 14) of one of the lens arrays 152, as shown in Figure 9.

[0078] Then, light incident on a microlens 164 of one lens array 152 exits from the microlens 164 of one lens array 152 and enters a microlens 164 of the other lens array 152. Light incident on a microlens 164 of the other lens array 152 exits from the microlens 164 of the other lens array 152 and is collected (condensed) on a light receiving element 126. Furthermore, the light receiving element 126 receives the light reflected from the document G and converts it into an electrical signal.

[0079] (Method of manufacturing an optical device) Next, a method for manufacturing an optical device will be described. Specifically, a method for manufacturing the image reading device 100 will be described. Note that the method for manufacturing the optical device will be described using the directions used in explaining the configuration of the image reading device 100.

[0080] The method for manufacturing this optical device includes the following steps, which are performed in the following numerical order: 1. Jig installation step for installing the T-shaped jig 200 in the housing 114 2. Fixing the light collecting unit 112 to the housing 114 3. Fixing the light receiving substrate 102 to the housing 114 4. Fixing process of the light guide 110, the glass plate 122, etc. to the housing 114

[0081] [Jig installation process] Jig 200 used in the jig installation step is made of metal and extends in the depth direction of the device as shown in Fig. 19. The depth direction of the device is an example of one direction.

[0082] As shown in Fig. 20, the jig 200 is T-shaped when viewed in the device depth direction, and includes a horizontal portion 202 extending in the device width direction and a vertical portion 204 extending in the device up-down direction. As shown in Fig. 19, seven vertical portions 204 are provided, and they are lined up at equal intervals in the device depth direction. The vertical portion 204 furthest in the device depth direction is disposed at the furthest part of the housing 114 in the device depth direction, and the vertical portion 204 furthest in the device depth direction is disposed at the front part of the housing 114 in the device depth direction.

[0083] The horizontal portion 202 is plate-shaped with its plate surface facing up and down, and has a rectangular shape extending in the device depth direction when viewed from above. When the jig 200 is installed in the housing 114, both ends of the upward-facing plate surface 202a of the horizontal portion 202 in the device width direction are in contact with the countersunk surfaces 117 of the housing 114, as shown in Fig. 20. The device width direction is an example of another intersecting direction.

[0084] The vertical portion 204 is plate-shaped with its plate surface facing the width direction of the device and has a rectangular shape extending in the depth direction of the device when viewed from the width direction of the device (see FIG. 19). When the jig 200 is installed in the housing 114, the vertical portion 204 is inserted into a through-hole 120b that penetrates the device in the up-down direction, and is sandwiched between a pair of opposing surfaces 120c. A pair of plate surfaces 204a of the vertical portion 204 are in contact with the pair of opposing surfaces 120c, respectively. The up-down direction of the device is an example of an intersecting direction.

[0085] The tip of the vertical portion 204 is inserted into the lower portion of the lens housing portion 114b, and a pair of protrusions 204b spaced apart in the width direction of the device are formed on the tip of the vertical portion 204. The pair of protrusions 204b extend in the depth direction of the device. The protrusions 204b are an example of a contact portion.

[0086] In this manner, in the jig installation step, the jig 200 is installed in the housing 114. 20 illustrates a state in which the jig 200 is installed on the housing 114 in which the light condensing unit 112 or the pair of lens arrays 152 has not been inserted into and temporarily fixed in the lens housing portion 114b of the housing 114. However, in the jig installation process, the jig 200 may be installed on the housing 114 in which the light condensing unit 112 or the pair of lens arrays 152 has been inserted into and temporarily fixed in the lens housing portion 114b, as described above. Here, temporarily fixing the light condensing unit 112 or the pair of lens arrays 152 to the housing 114 means supporting the light condensing unit 112 or the lens array 152 by the housing 114 to such an extent that the light condensing unit 112 or the lens array 152 can move within the lens housing portion 114b when an external force is applied to the light condensing unit 112 or the lens array 152. Specifically, the two surfaces of the pair of lens arrays 152 facing the device width direction are brought into contact with two surfaces of the lens accommodating section 114b that face each other in the device width direction, and the lens arrays 152 are sandwiched between the lens accommodating section 114b.

[0087] [Fixing process of light collecting part] In the process of fixing the light collecting unit, the light collecting unit 112 is placed on the tip of the vertical portion 204 that has entered the lens housing portion 114b from above, as shown in Fig. 21. In other words, the pair of lens arrays 152 and the light blocking member 150 are placed on the tip of the vertical portion 204 in this order.

[0088] In this state, the pair of protrusions 204b of the vertical portion 204 contact the underside 152b of the lens surface 158 and the light-shielding film 162 (at a portion on the outer side in the device width direction). In other words, the protrusions 204b contact a portion of the underside 152b of the lens array 152 that is different from the lens surface 158 and the light-shielding film 162. In yet other words, the protrusions 204b contact a portion of the underside 152b of the lens array 152 where the lens surface 158 and the light-shielding film 162 are not formed.

[0089] Furthermore, the pressing portion 210 is used to press the light collecting portion 112 from above against the vertical portion 204 of the jig 200. In other words, the pressing portion 210 is used to press the pair of lens arrays 152 from above against the vertical portion 204 of the jig 200 via the light blocking member 150. Furthermore, the pressing portions 220 and 230 are used to press the housing 114 from above against the horizontal portion 202 of the jig 200.

[0090] Specifically, as shown in Fig. 19, seven pressing portions 210 are provided, and are lined up at equal intervals in the device depth direction. Each pressing portion 210 is disposed above the light collecting portion 112 at the same position as the vertical portion 204 of the jig 200 in the device depth direction. In other words, the pressing portion 210 and the vertical portion 204 are positioned opposite each other in the vertical direction. Each pressing portion 210 is cylindrical and extends in the vertical direction, and is attached to a support member (not shown).

[0091] 19, the pressing portion 220 and the pressing portion 230 are arranged opposite each other in the device width direction, with the pressing portion 220 being arranged on one side of the pressing portion 210 in the device width direction, and the pressing portion 230 being arranged on the other side in the device width direction. There are six of each pair of pressing portions 220, 230, which are arranged at equal intervals in the device depth direction. The pressing portion 220, 230 furthest in the device depth direction is arranged at the furthest back in the device depth direction of the housing 114, and the pressing portion 220, 230 furthest in the device depth direction is arranged at the front side in the device depth direction of the housing 114.

[0092] The pressing portion 220 is plate-shaped and includes a main body portion 220a whose plate surface faces the width direction of the device and extends in the up-down direction when viewed from the width direction of the device, and a connecting portion 220b that is connected to the lower end of the main body portion 220a and extends toward the pressing portion 230. The connecting portion 220b is plate-shaped and has a rectangular shape whose plate surface faces the up-down direction of the device and extends in the depth direction of the device when viewed from above.

[0093] Pressing portion 220 and pressing portion 230 are symmetrical when viewed from the depth direction of the device, and pressing portion 230 includes main body portion 230a and connecting portion 230b. Each of pressing portions 220 and 230 is attached to a support member (not shown).

[0094] 22, the lower end of the pressing portion 210 is brought into contact with the upper end of the light collecting portion 112, and in this state, a load from a load applying portion (not shown) is transmitted to the light collecting portion 112 via the pressing portion 210. As a result, the light collecting portion 112 is pressed against the vertical portion 204 of the jig 200. In other words, the lens array 152 is pressed against the vertical portion 204 of the jig 200 via the light blocking member 150. The jig 200 is supported from below by a frame (not shown).

[0095] In this embodiment, the pressing force that presses the lens array 152 against the vertical portion 204 of the jig 200 can be individually adjusted. For example, when the light condensing unit 112 is pressed against the vertical portion 204 of the jig 200 by the weight of the pressing portion 210, the pressing force can be individually adjusted by changing the mass of the pressing portion 210. Specifically, when a pair of lens arrays 152 individually warps in the vertical direction relative to the depth direction of the device, the pressing force of the multiple pressing portions 210 can be individually adjusted to match the tendency of this warping. Specifically, when the central portion of the light condensing unit 112 warps so as to be convex upward, the mass of the pressing portion 210 that presses the central portion of the light condensing unit 112 against the vertical portion 204 of the jig 200 is made heavier than the mass of the other pressing portions 210. Conversely, if the central portion of the light collecting portion 112 is warped so as to be convex downward, the mass of the pressing portion 210 that presses both ends of the light collecting portion 112 against the vertical portion 204 of the jig 200 is made heavier than the mass of the other pressing portions 210.

[0096] Furthermore, the connecting portions 220b, 230b of the pressing portions 220, 230 are brought into contact with the step surface 118 of the housing 114, and in this state, a load from a load applying portion (not shown) is transmitted to the housing 114 via the pressing portions 220, 230. As a result, the housing 114 is pressed against the lateral portion 202 of the jig 200.

[0097] 23, the light collecting unit 112 is fixed to the housing 114 using the adhesive 240. In other words, the lens array 152 is fixed to the housing 114 using the adhesive 240. Specifically, the adhesive 240 is arranged at a similar interval so as to straddle the lens array 152 and the housing 114 and to surround the lens array 152 when viewed from above. In this way, the lens array 152 provided in the light collecting unit 112 is fixed to the housing 114.

[0098] [Substrate Fixing Process] In the substrate fixing process, the jig 200 is removed from the housing 114, and the plate surface of the light-receiving substrate 102 is brought into contact with the countersunk surface 117 as shown in Fig. 24 . In this state, the light-receiving substrate 102 is fixed to the housing 114 using an adhesive 242. Specifically, the adhesive 242 is arranged at a similar interval so as to straddle the light-receiving substrate 102 and the housing 114 and to surround the light-receiving substrate 102 when viewed from below. In this manner, the light-receiving substrate 102 is fixed to the housing 114.

[0099] In this step, as shown in FIG. 10, the rigid substrate 106 is placed in the substrate accommodating portion 114c, and the rigid substrate 106 is fixed to the housing 114 using a fixing member (not shown).

[0100] [Fixing process of light guide body, etc.] 9, in the process of fixing the light guide and the like, the light guide 110 is placed in the light guide housing portion 114a and fixed to the housing 114 using a fixing member (not shown). Furthermore, the glass plate 122 is placed on the step portion 115 and fixed to the housing 114 using a fixing member (not shown).

[0101] In this manner, the image reading device 100 is manufactured.

[0102] (summary) As described above, in the method for manufacturing an optical member, the pair of lens arrays 152 are pressed against the vertical portion 204 of the jig 200 via the light-shielding member 150, and the housing 114 is pressed against the horizontal portion 202 of the jig 200, and the lens arrays 152 are fixed to the housing 114 in this state. This suppresses variation in the distance between the lens array 152 and the light-receiving substrate 102 in the depth direction of the device, compared to when the lens array 152 is brought into contact with a positioning portion formed on the housing and fixed to the housing in this state using an adhesive.

[0103] Furthermore, in the method for manufacturing an optical device, protrusions 204b of vertical portions 204 of jig 200 come into contact with portions of lower surface 152b that are different from lens surface 158 and light-shielding film 162. Therefore, damage to lens surface 158 and light-shielding film 162 is suppressed compared to when the protrusions come into contact with the lens surface and light-shielding film.

[0104] Furthermore, in the method for manufacturing an optical device, a pair of protrusions 204b on vertical portion 204 of jig 200 are provided spaced apart in the device width direction, and lens surface 158 and light-shielding film 162 are disposed between the pair of protrusions 204b. This makes the orientation of lens array 152 relative to jig 200 more stable than when only one protrusion is provided.

[0105] Furthermore, in the method for manufacturing an optical device, with vertical portion 204 of jig 200 inserted into through-hole 120b, vertical portion 204 is sandwiched between opposing surface 120c of housing 114 in the device width direction. This reduces positional variation between jig 200 and housing 114 in the device width direction compared to when the vertical portion of the jig is spaced apart from the housing in the device width direction.

[0106] Furthermore, in the method for manufacturing an optical device, with vertical portion 204 of jig 200 inserted into through-hole 120b, plate surface 204a of vertical portion 204 is in surface contact with opposing surface 120c of housing 114 in the device width direction. This reduces positional variation between jig 200 and housing 114 in the device width direction compared to when the vertical portion is sandwiched at one point.

[0107] Furthermore, in the method for manufacturing an optical device, a plurality of vertical portions 204 of jig 200 are provided at intervals in the device depth direction, and light collecting portion 112 at a position where vertical portion 204 is arranged is pressed against jig 200 by pressing portion 210. This makes it possible to press light collecting portion 112 against jig 200 more effectively than when pressing a light collecting portion at a position other than the position where the vertical portion is arranged.

[0108] Furthermore, in the method for manufacturing an optical device, the pressing forces of the multiple pressing units 210 are individually adjusted in accordance with the tendency of warping of the pair of lens arrays 152. Specifically, the pressing force of the lens array 152 at the portion that is vertically separated from the housing 114 in the device depth direction can be adjusted to be stronger than the pressing force of the lens array 152 at the portion that is vertically in contact with the housing 114. In this way, when the pair of lens arrays 152 has a tendency to warp, variation in the separation distance between the pair of lens arrays 152 and the light receiving substrate 102 in the device depth direction is effectively suppressed compared to when the pressing forces of the multiple pressing units are all the same.

[0109] Although the present disclosure has been described in detail with respect to a specific embodiment, it will be apparent to those skilled in the art that the present disclosure is not limited to such an embodiment and that various other embodiments are possible within the scope of the present disclosure. For example, in the above embodiment, the image reading device 100 is used as the optical device to be manufactured, but an exposure device that irradiates exposure light onto a charged image carrier may also be used as the optical device. In this case, a light-shielding member is not used, and a light-emitting element is used as the optical element.

[0110] Furthermore, in the above embodiment, the pair of lens arrays 152 is pressed against the vertical portion 204 of the jig 200 via the light-shielding member 150, but in a configuration that does not require a light-shielding member, the pair of lens arrays 152 may be pressed directly against the vertical portion 204 of the jig 200. Furthermore, the pair of lens arrays 152 as optical members may be a single rod lens array in which multiple rod lenses are arranged in a straight line.

[0111] Although not specifically described in the above embodiment, as shown in FIG. 25 , the housing 214 may be divided vertically. Specifically, the housing 214 may be composed of a lower housing to which the light-collecting unit 112 is fixed at the top and the light-receiving substrate 102 is fixed at the bottom, and an upper housing to which the glass plate 122 and a pair of light guides 110 are fixed. If the position where the tops of the protrusions 156 of one lens array 152 and the tops of the protrusions 154 of the other lens array 152 are butted is defined as the butting position, FIG. 25 illustrates a configuration in which the distance from the butting position to the light-receiving element 126 is longer than the distance from the butting position to the document G. However, FIG. 25 is merely a diagram for illustrative purposes, and in reality, the distance from the butting position to the document G and the distance from the butting position to the light-receiving element 126 are the same, equivalent, or similar. The distance from the abutting position to the document G in FIG. 25 may be longer (greater) than the distance from the abutting position to the light receiving element 126.

[0112] In the above embodiment, the vertical portion 204 is sandwiched between the opposing surfaces 120c of the housing 114 in the device width direction, but the vertical portion and the housing may be spaced apart in the device width direction. In this case, however, the vertical portion 204 does not achieve the effect of being sandwiched between the opposing surfaces 120c of the housing 114 in the device width direction.

[0113] In the above embodiment, the pressing forces of the pressing portions 210 are individually adjusted, but the pressing forces do not have to be adjusted. In this case, however, the effect achieved by individually adjusting the pressing forces is not achieved.

[0114] Furthermore, in the above embodiment, the lens array 152 is fixed to the housing 114 by dot application of the adhesive 240, but the lens array may be fixed by applying adhesive to the entire periphery thereof, or may be fixed by welding. In the above embodiment, the jig 200 is T-shaped when viewed from the depth direction of the device, and includes a horizontal portion 202 extending in the width direction of the device and a vertical portion 204 extending in the up-down direction of the device. The horizontal portion 202 and the vertical portion 204 may be integrated or may be separated. In the latter case, the vertical height of the vertical portion 204 can be individually adjusted by sandwiching a thin metal plate such as a shim between the horizontal portion 202 and the vertical portion 204 and fixing the vertical portion 204 to the horizontal portion 202 with a fixing device such as a screw. [Explanation of symbols]

[0115] 100 Image reading device (an example of an optical device) 102 Light receiving substrate (example of substrate) 114 Case 117 Counterbore surface (example of surface) 120b Through hole (an example of a hole) 120c Opposing surface (an example of a clamping portion) 126 Photodetector (an example of an optical element) 150 Light blocking material 152 Lens array (an example of an optical component) 158 Lens Surface 162 Light-shielding film 200 Jig 202 Horizontal 204 Vertical section 204b Protrusion (an example of a contact part) 210 Pressing part

Claims

1. a step of inserting a plurality of vertical portions of a jig having a T-shaped cross section extending in one direction and provided at intervals in the one direction into a hole of a housing having a surface extending in one direction and sandwiched between the surfaces as viewed from a cross direction intersecting the one direction and penetrating the cross direction, and bringing both ends of the horizontal portions into contact with the surface; a step of placing an optical member on the tip of the vertical portion, and fixing the optical member to the housing in a state in which the portion of the optical member placed on the tip of the vertical portion and the housing are pressed against the jig; a step of fixing a substrate on which an optical element is mounted to the surface so that the optical element and the optical member face each other; A method for manufacturing an optical device having the above structure.

2. a step of inserting a plurality of vertical portions of a jig having a T-shaped cross section extending in one direction and provided at intervals in the one direction into a hole of a housing having a surface extending in one direction and sandwiched between the surfaces as viewed from a cross direction intersecting the one direction and penetrating the cross direction, and bringing both ends of the horizontal portions into contact with the surface; a step of placing an optical member and a light-shielding member in this order on the tip of the vertical portion, pressing the portion of the optical member placed on the tip of the vertical portion against the jig via the light-shielding member, and fixing the optical member to the housing in a state where the housing is pressed against the jig; a step of fixing a substrate on which a light-receiving element is mounted to the surface so that the light-receiving element and the optical member face each other; A method for manufacturing an optical device having the above structure.

3. The optical member has a plurality of convex lens surfaces arranged in the one direction and a light-shielding film surrounding the lens surfaces, a contact portion is formed on the vertical portion of the jig, the contact portion being in contact with a portion of the optical element other than the lens surface and the light-shielding film when the optical element is placed on a tip of the vertical portion; The method for manufacturing the optical device according to claim 1 or 2.

4. a pair of contact portions of the jig are provided so that the lens surface and the light-shielding film are disposed therebetween in the one direction and another intersecting direction intersecting the intersecting direction; The method for manufacturing an optical device according to claim 3 .

5. a pair of clamping portions are formed in the housing to clamp the vertical portion from the one direction and another intersecting direction intersecting with the intersecting direction when the vertical portion is inserted into the hole; When the vertical portion is inserted into the hole, the vertical portion is sandwiched by the sandwiching portion. A method for manufacturing an optical device according to any one of claims 1 to 4.

6. The clamping portion clamps the vertical portion with its surface. The method for manufacturing an optical device according to claim 5 .

7. a plurality of pressing portions for pressing the optical member against the jig are provided; In the step of fixing the optical member in a state where the optical member is pressed against the jig, the pressing forces of the plurality of pressing portions are individually adjusted in accordance with the tendency of warping of the optical member. A method for manufacturing an optical device according to any one of claims 1 to 6.

Images