JP2005274612A - Imaging device and manufacturing method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an imaging device in which a prism unit can efficiently and securely be fixed to the predetermined part of a housing. <P>SOLUTION: The imaging device includes the housing 20 and the prism unit housed in the housing 20. The housing 20 and the prism unit is fixed in the housing 20 by a first fixing part 75 disposed in the housing 20, and a second fixing part 76 exposed to the outside of the housing 20. A first adhesive 80 that takes a comparatively long hardening time is applied to the first fixing part 75. A second adhesive 85 whose hardening time is shorter than the first adhesive 80, for example, a photo-curing type one is applied to the second fixing part 76. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an imaging apparatus that can be used for, for example, a digital camera or a camera-equipped mobile phone, and a manufacturing method thereof.

  An image pickup apparatus using a decentered optical system has been proposed as a small image pickup apparatus usable for a digital camera or a camera-equipped mobile phone. For example, the following Patent Documents 1 to 3 describe an imaging apparatus including an imaging optical system that uses a prism formed of a free-form surface or the like.

  The aim of the techniques described in Patent Documents 1 to 3 is to form an imaging optical system using a prism, and to use a free-form surface for the light incident surface, light exit surface, or reflecting surface of the prism. Thus, a compact and high-quality image can be obtained. In particular, in Patent Document 2 (Japanese Patent Laid-Open No. 2002-196243) and Patent Document 3 (Japanese Patent Laid-Open No. 2003-84200), two light prisms are combined, and the light incident surface of the first prism closer to the object, It is described that free curved surfaces are used for all seven surfaces in total, that is, the light incident surface, the two reflective surfaces, and the light exit surface of the second prism closer to the reflective surface, the light exit surface, and the imaging surface.

As a feature of such an optical system,
(1) The three reflecting surfaces use free-form surfaces having power (refractive power), but these reflecting surfaces can obtain a large power with respect to a refractive optical system such as a lens, and at the same time, chromatic aberration. Not affected.

(2) It can have seven optical surfaces in a compact space. Accordingly, the optical elements can be condensed and set in a limited space.
(3) Although it is desirable to increase the optical path length of the entire optical system to some extent in order to improve the optical performance, by using such a prism optical system, the optical path is bent, but the entire optical path length is long. The size of can be made compact.
Japanese Patent Laid-Open No. 11-326766 JP 2002-196243 A JP 2003-84200 A

  In the compact imaging apparatus described above, it is difficult to fix small parts with screw members. For this reason, fixing parts with an adhesive agent is examined. For example, a room temperature curing type or a thermosetting type adhesive is used, but since it takes time to cure, it is necessary to occupy a jig for positioning the parts for a long time. For this reason, when mass-producing this type of imaging device, not only a large amount of jigs are required, but also the work (imaging device) cannot be moved while the adhesive is being cured. This is an obstacle to increasing efficiency.

  In order to shorten the bonding time, a photo-curing type adhesive or an instantaneous adhesive that cures in a short time may be used. However, since the housing of the imaging device is made of an optically opaque material, a photo-curing adhesive cannot be used for fixing components inside the housing. Further, the instant adhesive has a problem that gas is generated when it is cured. For these reasons, it is difficult to use an adhesive that hardens in a short time inside the casing.

  In addition, like a battery pack described in Japanese Patent Application Laid-Open No. 2001-118550, an indentation fitting in which a box-shaped upper lid and a lower lid are fitted together and both fitting portions are fixed by an adhesive or ultrasonic welding. Combined structures are also known. However, with such a seal fitting structure, the optical element unit cannot be fixed at a predetermined position on the inner surface of the housing.

  Accordingly, an object of the present invention is to provide an imaging apparatus capable of efficiently and reliably fixing an optical element unit at a predetermined position inside a housing, and a method for manufacturing the same.

  The imaging device of the present invention is an imaging device having an optically opaque casing and an optical element unit including an optical element housed in the casing, and is a first fixed located inside the casing. The optical element unit is fixed to the casing by the second fixing section exposed outside the casing and the casing. A first adhesive is applied to the first fixing portion, and a second adhesive having a shorter curing time than the first adhesive is applied to the second fixing portion.

  The optical element unit includes, for example, first and second prisms having an entrance surface, an exit surface, and a free-form reflecting surface, and a holding member that fixes the first and second prisms to each other. The holding member is fixed to the housing at the first and second fixing portions.

  In the present invention, a non-optically functional surface (for example, a side surface of the prism) of the first and second prisms made of a hardly adhesive resin such as a norbornene resin is provided with a peeling prevention portion made of a concave portion, a convex portion, or an inclined surface. An adhesive similar to the first adhesive may be applied between the peeling prevention portion and the housing. By doing so, the first and second prisms made of the hardly-adhesive resin are fixed to the housing via the peeling preventing portion, so that the optical element unit can be more firmly fixed to the housing.

  In a preferred embodiment of the present invention, in the second fixing portion, a hole facing the optical element unit is formed in the housing, and the second adhesive is supplied to the inside of the hole. Alternatively, the optical element unit has a convex portion inserted into the hole, and the second adhesive is applied to the second fixing portion in a state where the convex portion is inserted into the hole. . An example of the second adhesive is a photocurable adhesive.

In a preferred embodiment of the present invention, an adhesive reservoir recess for storing the first adhesive is formed in the first fixing portion.
In a preferred embodiment of the present invention, from the concave portion or the convex wall for preventing the first adhesive and the second adhesive from being mixed between the first fixing portion and the second fixing portion. An anti-mixing part is formed.
A gap may be secured between the inner surface of the casing and the optical element unit so that the relative position of the optical element unit with respect to the casing can be adjusted.

  In the manufacturing method of the present invention, a first application step of applying the first adhesive to the first fixing portion, and inserting the optical element unit into the housing after the first application step. An insertion step of stacking the optical element unit at a predetermined position of the housing via the first adhesive in the first fixing portion; and the first adhesion to the second fixing portion after the insertion step. A second application step of applying a second adhesive having a curing time shorter than that of the agent, and curing the second adhesive applied in the second application step to thereby mount the optical element unit in the housing. The optical element unit is cured by curing the first adhesive applied in the first application step and the first adhesive applied in the first application step over a longer time than the short-time curing step. A curing process to be fixed to the housing There.

  According to the present invention, the optical element unit can be reliably fixed at a predetermined position inside the housing by the first fixing portion and the second fixing portion. In addition, since the second adhesive is cured in a short time before the first adhesive is cured to a practical strength, the time for positioning the housing and the optical element unit with a jig or the like can be shortened. After the optical element unit is fixed to the housing by the second adhesive, it is possible to move the work (imaging device) to the next process or the like even if the first adhesive is not completely cured. , Work efficiency is improved.

A first embodiment of the present invention will be described below with reference to FIGS.
FIG. 1 shows a digital camera 1 as an example of an imaging device, and FIG. 2 shows its inside. As shown in FIG. 1, a release button 3, a flash 4, a finder optical system 5, an imaging optical system cover glass 6, and the like are provided in a housing 2 of the digital camera 1.

  As shown in FIG. 2, an imaging device 10, an image processing circuit 11, a recording unit 12, and the like are accommodated in the housing 2. The image processing circuit 11 obtains image data by performing predetermined electrical processing on the electrical signal obtained by the imaging device 10. The recording unit 12 records the image data from the image processing circuit 11 on a recording medium. An image monitor 13 is provided on the back surface of the housing 2.

  As shown in FIGS. 3 to 5, the imaging device 10 is arranged on a housing 20, a prism unit 21 constituting a decentered optical system housed in the housing 20, and an image plane of the prism unit 21. The image sensor 22 such as a CCD and a frame member (fixed frame) 24 to which the substrate 23 is fixed are included. The image sensor 22 is mounted at a predetermined position on the substrate 23. The prism unit 21 corresponds to the optical element unit referred to in the present invention.

  The cover glass 6 is attached to an opening (incident window) 25 on the incident side of the housing 20. An optical member 26 such as a filter is attached to the opening on the emission side of the housing 20. As shown in FIGS. 4 and 5, a part 20 a of the housing 20 is fitted to the frame member 24, and both are fixed to each other by a black adhesive 27 that has both a light shielding property and a dustproof function. A sealed dust-proof space is formed inside. The material of the housing 20 and the frame member 24 is a synthetic resin such as polycarbonate having good adhesion to the adhesive 27.

  FIG. 6 shows an example of the prism unit 21. The prism unit 21 includes a first prism 31 that functions as an optical element, a second prism 32 that functions as an optical element, and a holding member 33. These prisms 31 and 32 and the holding member 33 constitute an optical element unit.

  The holding member 33 includes a throttle part 36 in which a throttle hole 34 and a positioning hole 35 are formed, an attachment part 37 fixed to the ceiling wall 20b (shown in FIG. 4) of the housing 20, and both sides of the attachment part 37. A pair of protruding portions 38 projecting is provided. FIG. 6 shows only one of the pair of overhang portions 38.

  Both the first and second prisms 31 and 32 are formed of a material having excellent optical characteristics, such as a norbornane resin. The norbornene-based resin is a material having excellent optical characteristics, but has a low adhesive force to various adhesives. That is, it is a difficult-to-adhere resin that is easy to peel off. Note that a cycloolefin resin or a polyolefin resin may be used as the material of the prisms 31 and 32.

  As shown in FIGS. 4 and 6, the first prism 31 includes an incident surface 50, a free-form reflecting surface 51 having a rotationally asymmetric and symmetric surface, an exit surface 52, and a pair of side surfaces 53. Is a decentered prism. A coating layer 54 is formed on the reflective surface 51 by, for example, aluminum vapor deposition.

  As shown in FIG. 6, a flat portion 55 is formed around the emission surface 52. Positioning projections 56 are formed on the flat portion 55. On both side surfaces (non-optical functional surfaces) 53 of the prism 31, convex portions 57 are formed which are marks that are cut portions used as resin injection gates when the prism 31 is molded. The positioning projection 56 of the prism 31 is fitted into the positioning hole 35 of the holding member 33 from one surface side of the diaphragm portion 36, and the flat portion 55 is fixed to the holding member 33 with an adhesive. By doing so, the first prism 31 is held at a predetermined position of the holding member 33.

  The second prism 32 is an eccentric prism having an incident surface 60, two reflecting surfaces 61 and 62, an exit surface 63, and a pair of side surfaces 64. At least one of the two reflecting surfaces 61 and 62 is rotationally asymmetric and has a free-form surface shape having one symmetric surface. On these reflection surfaces 61 and 62, coating layers 65 and 66 are formed by, for example, aluminum vapor deposition.

  A flat portion 67 is formed around the incident surface 60. A positioning protrusion 68 is formed on the flat portion 67. On both side surfaces (non-optical functional surfaces) 64 of the prism 32, convex portions 69 are formed that are marks that are cut portions of the prism 32 used as a resin injection gate. The positioning protrusion 68 of the prism 32 is fitted into the positioning hole 35 of the holding member 33 from the other surface side of the diaphragm 36, and the flat portion 67 is bonded to the holding member 33 with an adhesive. As a result, the second prism 32 is held at a predetermined position of the holding member 33.

  Although the positioning hole 35 is a through hole in this embodiment, black coating is applied to the protrusions 56 and 68 in order to prevent light leakage. As another means for providing the same effect, the hole 35 may not be a through hole, and a bottomed hole may be formed from both surfaces of the throttle portion 36.

  As shown in FIG. 4, the light beam incident on the first prism 31 from the incident-side opening 25 along the incident optical axis λ <b> 1 is reflected by the reflecting surface 51 of the first prism 31, and is emitted from the emitting surface 52. The light enters the second prism 32 through the incident surface 60. Then, the light is reflected by the reflection surfaces 61 and 62, and is imaged by the image sensor 22 from the emission surface 63 through the optical member 26 along the emission optical axis λ <b> 2. The incident optical axis λ1 and the outgoing optical axis λ2 are substantially parallel.

  As shown in FIG. 7, a convex portion (boss portion) 70 is formed on the attachment portion 37 of the holding member 33. A recess 71 is formed in the ceiling wall 20 b of the housing 20, and a hole (through hole) 72 is formed in the recess 71. The hole 72 opens at a position facing the attachment portion 37 of the holding member 33. The convex portion 70 is inserted into the hole 72. Between the outer peripheral surface of the convex part 70 and the inner peripheral surface of the hole 72, there is a gap 73 into which the following second adhesive 85 can enter.

  As shown in FIG. 7, the prism unit 21 is fixed to the housing 20 by a first fixing portion 75 located inside the housing 20 and a second fixing portion 76 exposed outside the housing 20. The The first fixing portion 75 is located inside the housing 20, and the first adhesive 80 fixes the attachment portion 37 of the holding member 33 and the ceiling wall 20 b of the housing 20 to each other.

  The first fixing portion 75 has an adhesive reservoir recess 82 formed around the convex portion 70 and an adhesive receiving groove 83 formed concentrically around the convex portion 70. The adhesive reservoir recess 82 has a plurality of grooves (shown in FIG. 8) that are formed radially around the protrusion 70.

  An example of the first adhesive 80 is a two-component mixed epoxy resin (thermosetting resin), but it may be a room temperature curing adhesive, or a silicon adhesive or a thermoplastic resin (acrylic, styrene). Adhesives made of a system etc. may be used. The adhesive 80 is preferably black in order to ensure light shielding properties.

  The second fixing portion 76 is exposed to the outside of the housing 20, and the second adhesive 85 fixes the convex portion 70 and the ceiling wall 20 b of the housing 20 to each other at the convex portion 70 and in the vicinity thereof. It has become. The second adhesive 85 is cured in a state where it penetrates into the gap 73 between the inside of the hole 72, that is, between the convex portion 70 and the inner peripheral surface of the hole 72. Since the convex portion 70 is fitted in the hole 72, the fixing strength by the adhesives 80 and 85 can be further increased.

  The second adhesive 85 applied to the second fixing portion 76 is a photo-curing adhesive, and for example, an adhesive that cures in a short time by irradiating ultraviolet rays is used. Since the second fixing portion 76 is exposed to the outside, it is also possible to use an instantaneous adhesive that generates gas when, for example, it absorbs moisture in the air and cures.

  Between the first fixing part 75 and the second fixing part 76, an anti-mixing part composed of a convex wall 86 for preventing the first adhesive 80 and the second adhesive 85 from being mixed is formed. Has been. By providing such a convex wall 86, it is possible to prevent the occurrence of poor curing due to the mixing of the two types of adhesives 80 and 85.

  When these adhesives 80 and 85 are cured, the prism unit 21 is fixed to a predetermined position of the housing 20. The housing 20 and the holding member 33 are made of a synthetic resin such as polycarbonate or ABS resin with good adhesiveness of the adhesives 80 and 85. A gap G (a part of which is shown in FIGS. 4 and 10) is secured between the inner surface of the housing 20 and the prism unit 21 so that the position of the prism unit 21 with respect to the housing 20 can be adjusted.

  As shown in FIG. 5, openings 90 are formed in both side walls 20 c of the housing 20, that is, both side walls 20 c facing both side surfaces 53 and 64 of the prisms 31 and 32. These openings 90 are formed at positions corresponding to the convex portions 57 and 69 of the first and second prisms 31 and 32. As shown in FIG. 3, the opening 90 in this embodiment is formed in a horizontally long shape along the direction in which the prisms 31 and 32 are arranged so as to include convex portions 57 and 69 on the same side. .

  As representatively shown in FIG. 5, both side surfaces 53 of the prism 31 and both side walls 20 c of the housing 20 are fixed to each other by an adhesive 91. The adhesive 91 is supplied with liquid before curing by a dispenser or the like from the opening 90 toward the convex portion 57 inside the housing 20, and is cured at the convex portion 57 and its vicinity.

  An example of the adhesive 91 is an epoxy resin (thermosetting resin), but an adhesive made of a silicon adhesive or a thermoplastic resin (acrylic, styrene, or the like) may be used. Since the adhesive 91 is supplied from the opening 90 to the inside of the housing 20, it is easy to supply the adhesive 91 with a dispenser or the like. The adhesive 91 is a black type in order to ensure light shielding properties.

  Since the adhesive 91 is cured over the opening 90 of the housing 20 and the convex portion 57 of the prism 31, even if the prisms 31 and 32 are made of a hardly adhesive resin such as a norbornene resin, FIG. A large peel strength can be exhibited with respect to the force in the arrow Y direction. Similarly to the first prism 31, the second prism 32 is also fixed to the inner surface of the housing 20 by a convex portion 69 and an adhesive 91 supplied in the vicinity thereof. These convex parts 57 and 69 function as a peeling prevention means.

  The adhesive 91 is applied to both side surfaces 53 and 64 of the first and second prisms 31 and 32 so as to support the first and second prisms 31 and 32 from both sides of the housing 20. Therefore, coupled with the fact that these prisms 31 and 32 are bonded to the holding member 33, even the prisms 31 and 32 made of a hardly adhesive resin such as a norbornene-based resin are resistant to impacts and the like. High strength can be obtained.

  The manufacturing method of the imaging device 10 configured as described above includes the following steps (1) to (8).

(1) A step of fixing the first and second prisms 31 and 32 at predetermined positions of the holding member 33 with an adhesive.
(2) After the prisms 31 and 32 are bonded to the holding member 33, as shown in FIG. A step of supplying the adhesive 80 (first coating step).

  (3) After performing the first application step, as shown in FIG. 10, the prism unit 21 is inserted into the housing 20, and the first fixing portion 75 and the first adhesive 80 together with the prism are prisms. A step of inserting the unit 21 at a predetermined position of the housing 20 (insertion step). In the present embodiment, a gap G (shown in FIG. 10) in which the prism unit 21 can move to some extent in the horizontal direction is secured between the inner surface of the housing 20 and the prism unit 21. The position of the prism unit 21 can be finely adjusted.

(4) A process of applying the second adhesive 85 having a shorter curing time than the first adhesive 80 to the second fixing portion 76 after performing the insertion process (second application process).
(5) As shown in FIG. 10, the second adhesive 85 applied in the second application step is irradiated with ultraviolet rays (UV) by the ultraviolet irradiation device 101, and the second adhesive 85 is applied in a short time. A step of curing and fixing the prism unit 21 to the housing 20 (a short-time curing step). In this step, while the second adhesive 85 is cured, the protruding protrusion 38 of the holding member 33 is supported by the lower pressing jig 102 and the ceiling wall 20b of the housing 20 is pressed by the upper pressing jig. The tool 103 is pressed from above. By doing so, the housing 20 and the prism unit 21 are clamped at a predetermined position.
After the second adhesive 85 is cured, the holding jigs 102 and 103 are removed from the housing 20 and the prism unit 21. In addition, since the temperature of the 1st fixing | fixed part 75 rises to some extent with the ultraviolet-ray (UV) irradiated to the 2nd fixing | fixed part 76, hardening of the 1st adhesive agent 80 can be accelerated | stimulated.

  (6) A step of fixing the prism unit 21 to the housing 20 by curing the first adhesive 80 applied to the first fixing portion 75 over a longer time than the short-time curing step ( Curing step).

(7) A step of supplying the adhesive 91 from the opening 90 on the side surface of the housing 20 toward the convex portions 57 and 69 of the first and second prisms 31 and 32 and curing the adhesive 91.
(8) A step of fitting the frame member 24 to the housing 20 and fixing the housing 20 and the frame member 24 with the adhesive 27. In addition, you may make it accelerate | stimulate hardening of the adhesive agents 27, 80, and 91 by putting the housing | casing 20 and the prism unit 21 in a furnace, for example, and heating.

  According to the imaging apparatus 10, the prism unit 21 is fixed inside the housing 20 by the first adhesive 80 having high adhesive strength and stable strength and the second adhesive 85 having a short adhesive time. It can be securely fixed in position. Further, since the second adhesive 85 is cured in a short time before the first adhesive 80 reaches the practical strength, the time for positioning the housing 20 and the prism unit 21 by the jigs 102, 103, etc. is short. Tesumu. After the prism unit 21 is fixed to the housing 20 by the second adhesive 85, the work (imaging device 10) is moved to the next process or the like even if the first adhesive 80 is not completely cured. Work efficiency is improved.

  FIG. 11 shows an adhesive reservoir recess 82 according to the second embodiment of the present invention. The adhesive reservoir recess 82 of this embodiment is constituted by a plurality of grooves having a square cross section. Note that the adhesive reservoir recess 82 may be formed on the housing 20 side instead of being formed on the holding member 33.

  FIG. 12 shows a first fixing part 75 and a second fixing part 76 according to the third embodiment of the present invention. A convex wall 110 is formed on the ceiling wall 20 b of the housing 20 between the first fixing portion 75 and the second fixing portion 76. The convex wall 110 is inserted into the concave portion 111 formed in the holding member 33. Thereby, the mixing prevention part for preventing that two types of adhesives 80 and 85 are mixed is comprised. Other basic configurations and operations are the same as those in the first embodiment.

  As shown in FIG. 13, after applying the first adhesive 80 to the first fixing portion 75, plasticity is applied so that the tip portion is expanded in diameter by applying heat to the convex portion 70 of the second fixing portion 76. You may fix the housing | casing 20 and the holding member 33 by making it deform | transform (what is called heat caulking). Alternatively, a part of the convex portion 70 can be melted by ultrasonic welding, and the housing 20 and the holding member 33 can be fixed.

  FIG. 14 shows a first fixing portion 75 and a second fixing portion 76 according to the fourth embodiment of the present invention. As in the first embodiment, the first adhesive 80 is applied to the first fixing portion 75. The second fixing portion 76 is applied with the second adhesive 85 across the inner surface of the hole 72 and the holding member 33, whereby the casing 20 and the holding member 33 are fixed to each other. Other basic configurations and operations are the same as those in the first embodiment.

  FIG. 15 shows a first fixing portion 75 and a second fixing portion 76 according to the fifth embodiment of the present invention. In this embodiment, the convex wall 110 is formed between the first fixing portion 75 and the second fixing portion 76. The convex wall 110 is inserted into the concave portion 111 formed in the holding member 33 and constitutes a mixing prevention portion. In the second fixing portion 76, the second adhesive 85 is applied to the inner surface of the hole 72 and the holding member 33, and the housing 20 and the holding member 33 are fixed to each other.

  FIG. 16 shows an imaging apparatus 10 ′ according to the sixth embodiment of the present invention. In this embodiment, a coaxial lens 120 as an optical element unit is fixed to the housing 20 by a first fixing portion 75 and a second fixing portion 76. The first fixing portion 75 is located inside the housing 20, and the second fixing portion 76 is exposed outside the housing 20.

  The first fixing portion 75 is provided with an adhesive reservoir recess 82 and is provided with a mixing prevention portion composed of the convex wall 110 and the recess 111. The second fixing portion 76 is formed with a hole 72 that faces the frame portion 120 a of the lens 120. The holes 72 are formed at three locations, for example, at equal intervals in the circumferential direction of the lens 120. An adhesive receiving groove 121 is formed between the second fixing portion 76 and the optical function surface of the lens 120 in order to prevent the second adhesive 85 from adhering to the optical function surface.

  The housing 20 and the lens 120 are fixed by applying the first adhesive 80 to the first fixing portion 75. The hole 72 of the second fixing portion 76 is coated with a second adhesive 85 (for example, a photo-curing adhesive) 85 that cures in a shorter time than the first adhesive 80 and is irradiated with ultraviolet rays or the like. Is cured by.

  FIG. 17 shows an example in which the imaging apparatus of the present invention is incorporated in a camera-equipped mobile phone 130 as an example of imaging equipment. By incorporating the imaging device described in the above embodiments into the camera-equipped mobile phone 130, the camera-equipped mobile phone 130 can be further reduced in size and thickness and improved in optical performance.

  In carrying out the present invention, the constituent elements of the invention, including the casing, the optical element unit, the first and second fixing portions, and the first and second adhesives, do not depart from the spirit of the invention. It goes without saying that various modifications can be made.

1 is a perspective view of a digital camera including an imaging device according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view schematically showing the inside of the digital camera shown in FIG. 1. 1 is a perspective view of an imaging apparatus showing a first embodiment of the present invention. Sectional drawing of the imaging device which follows the IV-IV line in FIG. Sectional drawing of the imaging device which follows the VV line | wire in FIG. FIG. 4 is an exploded perspective view of a prism unit of the imaging apparatus shown in FIG. 3. Sectional drawing which shows the 1st and 2nd fixing | fixed part of the imaging device shown by FIG. Sectional drawing of the adhesive agent accumulation recessed part in alignment with the VIII-VIII line in FIG. Sectional drawing which shows the process of apply | coating a 1st adhesive agent in the manufacturing method of the prism unit of the imaging device shown by FIG. Sectional drawing which shows the process of hardening a 2nd adhesive agent in the manufacturing method of the prism unit of the imaging device shown by FIG. Sectional drawing which shows the adhesive agent accumulation recessed part of the imaging device of the 2nd Embodiment of this invention. Sectional drawing which shows the 1st and 2nd fixing | fixed part of the imaging device of the 3rd Embodiment of this invention. Sectional drawing which shows the 2nd fixing | fixed part using heat caulking. Sectional drawing which shows the 1st and 2nd fixing | fixed part of the imaging device of the 4th Embodiment of this invention. Sectional drawing which shows the 1st and 2nd fixing | fixed part of the imaging device of the 5th Embodiment of this invention. Sectional drawing which shows the 1st and 2nd fixing | fixed part of the imaging device of the 6th Embodiment of this invention. The perspective view which shows an example of the mobile phone with a camera.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Imaging device 20 ... Housing 21 ... Prism unit (optical element unit)
DESCRIPTION OF SYMBOLS 31 ... 1st prism 32 ... 2nd prism 33 ... Holding member 70 ... Convex part 72 ... Hole 75 ... 1st fixing | fixed part 76 ... 2nd fixing | fixed part 80 ... 1st adhesive agent 85 ... 2nd adhesion | attachment Agent

Claims (9)

An optically opaque housing;
An optical element unit including an optical element housed in the housing;
An imaging device having
A first fixing portion provided inside the casing and fixing the optical element unit at a predetermined position inside the casing with a first adhesive;
A second fixing portion that is provided so as to be exposed to the outside of the housing, and that fixes the optical element unit to the housing with a second adhesive having a curing time shorter than that of the first adhesive;
An imaging apparatus comprising: The optical element unit includes first and second prisms having an entrance surface, an exit surface, and a free-form reflecting surface, and a holding member that fixes the first and second prisms to each other.
The imaging apparatus according to claim 1, wherein the holding member is fixed to the housing at the first and second fixing portions.   The said 2nd fixing | fixed part WHEREIN: The hole which faces the said optical element unit is formed in the said housing | casing, The said 2nd adhesive agent is supplied to the inner side of this hole. The imaging device described in 1.   In the second fixing portion, a hole that faces the optical element unit is formed in the housing, a convex portion that is inserted into the hole is formed in the optical element unit, and the convex portion is inserted into the hole. 3. The image pickup apparatus according to claim 1, wherein the second adhesive is applied to the second fixing portion in the applied state.   The imaging apparatus according to claim 1, wherein the second adhesive is a photocurable adhesive.   The imaging device according to claim 1, wherein an adhesive reservoir recess for storing the first adhesive is formed in the first fixing portion.   Between the first fixing part and the second fixing part, a mixing prevention part composed of a concave portion or a convex wall is formed to prevent the first adhesive and the second adhesive from being mixed. The imaging apparatus according to claim 1, wherein the imaging apparatus is provided.   The clearance gap which can adjust the relative position of the said optical element unit with respect to the said housing | casing is ensured between the inner surface of the said housing | casing and the said optical element unit. Imaging device. An imaging apparatus having an optically opaque casing and an optical element unit including an optical element accommodated in the casing,
The imaging device
A first fixing portion located inside the casing and fixing the casing and the optical element unit to each other;
A second fixing portion that is exposed to the outside of the casing and fixes the casing and the optical element unit to each other;
A first application step of applying a first adhesive to the first fixing portion;
Insertion step of inserting the optical element unit into the housing after the first coating step and overlapping the optical element unit at a predetermined position of the housing together with the first adhesive in the first fixing portion. When,
A second application step of applying a second adhesive having a shorter curing time than the first adhesive to the second fixing portion after the insertion step;
A short-time curing step of fixing the optical element unit to the housing by curing the second adhesive applied in the second application step;
A curing step of fixing the optical element unit to the casing by curing the first adhesive applied in the first application step over a longer time than the short-time curing step;
An image pickup apparatus manufacturing method comprising:

Images