WO2015119296A1 - Procédé de fabrication d'unité optique et unité optique - Google Patents

Procédé de fabrication d'unité optique et unité optique Download PDF

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Publication number
WO2015119296A1
WO2015119296A1 PCT/JP2015/053699 JP2015053699W WO2015119296A1 WO 2015119296 A1 WO2015119296 A1 WO 2015119296A1 JP 2015053699 W JP2015053699 W JP 2015053699W WO 2015119296 A1 WO2015119296 A1 WO 2015119296A1
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WO
WIPO (PCT)
Prior art keywords
lens
receiving portion
seal member
elastic seal
optical unit
Prior art date
Application number
PCT/JP2015/053699
Other languages
English (en)
Japanese (ja)
Inventor
和夫 柴
Original Assignee
日本電産サンキョー株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本電産サンキョー株式会社 filed Critical 日本電産サンキョー株式会社
Priority to JP2015534872A priority Critical patent/JPWO2015119296A1/ja
Publication of WO2015119296A1 publication Critical patent/WO2015119296A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/021—Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/022—Mountings, adjusting means, or light-tight connections, for optical elements for lenses lens and mount having complementary engagement means, e.g. screw/thread
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/025—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using glue
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/026—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using retaining rings or springs
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices

Definitions

  • the present invention relates to an optical unit manufacturing method in which a lens is fixed to a lens holder with an elastic seal member interposed therebetween, and an optical unit.
  • Patent Document 1 When sealing between members in an optical unit or the like, a configuration using an O-ring is frequently used (see Patent Document 1).
  • an object of the present invention is to provide an optical unit manufacturing method and an optical unit capable of appropriately sealing between a lens and a lens holder.
  • the present invention includes a lens and a cylindrical lens holder formed so that a receiving portion facing the lens on one side in the optical axis direction surrounds an optical path,
  • the receiving portion is attached to the lens.
  • a recess having a sidewall that is inclined so as to widen the opening width on the opening end side is formed, and a liquid is formed in a region surrounding the optical path including the formation region of the recess in the receiving portion.
  • the present invention includes a lens and a cylindrical lens holder formed so that a receiving portion facing the lens on one side in the optical axis direction surrounds the optical path, and elastically surrounds the optical path
  • the receiving portion opens toward the lens and has an opening width.
  • a recess having a side wall inclined so as to be widened on the opening end side is formed, and the elastic sealing member applies a liquid composition to a region surrounding the optical path including the formation region of the recess in the receiving portion. It is made of a polymer material that is hardened after being deformed, and is elastically deformed between the lens and the receiving portion.
  • an elastic seal member formed by curing the liquid composition applied to the receiving portion is interposed between the lens and the receiving portion of the lens holder, and is pressed against the receiving portion to elastically deform the elastic sealing member.
  • the liquid composition applied to the receiving part is cured to form an elastic seal member, and then the lens is stacked on the receiving part, so that the adhesive flows out between the lens and the receiving part to an unnecessary part. No such situation will occur.
  • the elastic seal member is in contact with the lens with an area of at least the opening width of the recess. According to such a configuration, since the elastic seal member is in contact with the lens and the receiving portion with a wide area, the sealing performance is not easily impaired even if a small foreign matter is interposed.
  • the elastic seal member is peelable from the receiving portion. According to this configuration, after the elastic seal member is formed, if there is a problem with the elastic seal member, the elastic seal member can be removed and the elastic seal member can be formed again.
  • the lens is a first lens group mounted on an object side end of the lens holder, and the receiving part is configured to face the object side on the image side than the first lens group. Can be adopted.
  • the recess is preferably an annular recess surrounding the optical path. According to such a configuration, sealing can be reliably performed over the entire circumference.
  • the receiving portion has a positioning portion that contacts the first lens group on the object side from the opening position of the annular recess
  • the elastic seal member forming step includes the step of forming the liquid composition inside the recess. It is preferable that the elastic seal member is formed by being filled in and cured in a state of protruding toward the object side in the optical axis direction from the positioning portion.
  • the receiving portion has a positioning portion that contacts the first lens group on the object side from the opening position of the annular recess.
  • the receiving portion includes an inner step portion that is radially inward of the annular recess and faces radially outward, and an outer step portion that is radially outward of the annular recess and faces radially inward. It is preferable. According to such a configuration, the formation width of the elastic seal member can be regulated by the inner step portion and the outer step portion.
  • the lens holder includes an annular groove that is recessed radially inward from the receiving portion toward the image side, and the radially inner portion of the lens holder is radially inward of the first lens group. It is preferable that the second lens unit disposed on the image side is a deformed portion when the caulking is fixed. According to such a configuration, even if the lens holder is caulked, problems such as distortion of the shape of the recess due to the caulking are unlikely to occur.
  • the positioning portion is preferably formed at least between the annular recess and the annular groove.
  • the lens holder is a resin molded product
  • the thickness of the bottom of the annular recess is the thickness of any portion located radially inward of the annular recess, And it is preferable that it is equal to the thickness of any part located in the radial direction outer side with respect to the said annular recessed part. According to such a configuration, sink marks during resin molding can be suppressed using the annular recess.
  • the lens holder has a deformed portion that is crimped so as to cover an outer peripheral end portion of the first lens group from the object side, and the first lens group includes the elastic seal member by the deformable portion. It is preferable to be pressed and fixed to the receiving portion in a state of being elastically deformed.
  • an elastic seal member formed by curing the liquid composition applied to the receiving portion is interposed between the lens and the receiving portion of the lens holder, and is pressed against the receiving portion to elastically deform the elastic sealing member.
  • the liquid composition applied to the receiving part is cured to form an elastic seal member, and then the lens is stacked on the receiving part, so that the adhesive flows out between the lens and the receiving part to an unnecessary part. No such situation will occur.
  • FIG. 1 is an explanatory diagram of an optical unit to which the present invention is applied.
  • FIGS. 1A and 1B are enlarged cross-sectional views of the optical unit and a seal structure between the first lens group and the lens holder. It is sectional drawing shown.
  • the optical unit 1 of this embodiment includes a wide-angle optical lens 10 having a wide-angle lens 10 in which a plurality of lenses are arranged in the optical axis L direction, and a cylindrical holder 9 that holds the wide-angle lens 10 inside.
  • the holder 9 includes a cylindrical lens holder 7 that holds the wide-angle lens 10 and the like, and a cylindrical imaging element holder 8 that holds a substrate 62 on which the imaging element 61 is mounted.
  • the inside of the lens holder 7 is an optical path L0. It has become.
  • the imaging element holder 8 has a larger outer diameter than the lens holder 7.
  • the lens holder 7 is fixed to the inside of the image sensor holder 8 by a screw mechanism 90 or the like.
  • both the lens holder 7 and the image sensor holder 8 are made of a resin molded product.
  • the angle of view of the wide-angle lens 10 is, for example, 190 °.
  • the wide-angle lens 10 includes, for example, four lens groups. More specifically, the wide-angle lens 10 includes, in order from the object side L1 (subject / front side), a first lens group 11 having a negative power, a second lens group 12 having a negative power, and a positive power. And a fourth lens group 14 having positive power.
  • the wide-angle lens 10 has a total of five lenses. More specifically, the first lens group 11 is composed of a single lens having negative power, the second lens group 12 is composed of a lens single lens having negative power, and the third lens group 13 is composed of positive lenses. It consists of a single lens with power.
  • the fourth lens group 14 includes a cemented lens of a lens 15 having a negative power having a positive power and a lens 16 having a positive power.
  • the first lens group 11 is made of a glass lens or a plastic lens
  • the second lens group 12, the third lens group 13, and the fourth lens group 14 (lenses 15 and 16) are made of a plastic lens.
  • the optical unit 1 has a diaphragm 18 between the third lens group 13 and the fourth lens group 14, and has an infrared cut filter 17 on the image side L2 from the fourth lens group 14.
  • the lens holder 7 includes a first cylindrical portion 71 located on the image side L2, a cylindrical second cylindrical portion 72 located on the object side L1 from the first cylindrical portion 71, and a second cylinder. And a cylindrical third cylindrical portion 73 located on the object side L1 from the portion 72, and the inner diameter of each cylindrical portion has the following relationship: first cylindrical portion 71 ⁇ second cylindrical portion 72 ⁇ third cylindrical portion 73 have.
  • a step portion 74 facing the object side L ⁇ b> 1 is formed at the boundary portion between the first tube portion 71 and the second tube portion 72.
  • the outer peripheral side end portion 15 is in contact with the object side L1.
  • the second lens group 12, the third lens group 13, and the fourth lens group 14 are arranged so as to overlap each other on the outer peripheral side in the direction of the optical axis L.
  • a portion located on the object side L1 is a flange portion 75 having a thickened diameter in the radial direction.
  • a surface facing the object side L1 inside the third cylindrical portion 73 is formed.
  • a receiving portion 76 that surrounds the optical path L ⁇ b> 0 on the outer side in the radial direction is formed on the inner surface of the third cylindrical portion 73 toward the object side L ⁇ b> 1. Overlaps the first lens group 11 on the image side L2. Further, in the flange portion 75, the radially inner side from the receiving portion 76 is a portion for fixing the second lens group 12 by caulking.
  • the receiving portion 76 is formed with a concave portion 77 that is recessed toward the image side L2 at a substantially intermediate position in the radial direction.
  • the recess 77 is an annular recess surrounding the optical path L0.
  • the side walls 771 and 772 are tapered surfaces inclined so as to widen the opening width on the opening end side.
  • the side walls 771 and 772 are inclined by about 3 ° with respect to a line (normal line) perpendicular to the bottom 773.
  • An annular groove 788 that is recessed in the image side L2 is formed between the concave portion 77 and the inner edge of the flange portion 75, and a portion located on the radially inner side of the annular groove 788 is the outer peripheral side end of the second lens group 12. This is a deformed portion 789 when the portion is crimped so as to cover the portion from the object side L1. Further, on the outer side in the radial direction from the concave portion 77, an annular shape that contacts the outer end of the first lens group 11 on the object side L 1 from the opening position of the concave portion 77 and positions the first lens group 11 in the optical axis L direction. An outer positioning portion 783 is formed. As a result, an annular outer step 781 facing radially inward is formed on the radially outer side of the recess 77.
  • an annular elastic seal member 4 surrounding the optical path L0 is disposed between the receiving portion 76 and the first lens group 11. ing.
  • the tip of the third cylindrical portion 73 is a deformed portion 731 when the outer peripheral side end of the first lens group 11 is crimped so as to cover from the object side L1, and the first lens group 11 is elastic.
  • the seal member 4 is pressed and fixed to the receiving portion 76 in a state of being elastically deformed. Therefore, the space between the first lens group 11 and the receiving portion 76 is sealed by the elastic seal member 4, so that foreign matters such as moisture are less likely to enter the inside in the radial direction from the receiving portion 76 from the outside.
  • the elastic seal member 4 is formed after the liquid composition is applied to a region surrounding the optical path L0 including the formation region of the concave portion 77 in the receiving portion 76 before the first lens group 11 is provided.
  • the elastic sealing member 4 is made of a polymer material to be cured, and is formed inside the recess 77 and around the recess 77.
  • FIG. 2 is an explanatory view showing a method of manufacturing the elastic seal member 4 according to the present invention.
  • the sealing method, the sealing structure, and the manufacturing method of the optical unit 1 using the elastic seal member 4 of this embodiment first, when the lens holder 7 is resin-molded, the receiving portion 76 is attached to the first lens group 11 (lens).
  • a recess 77 having side walls 771 and 772 that are open toward the opening and inclined so as to widen the opening width on the opening end side is formed.
  • the fourth lens group 14, the third lens group 13, and the second lens group 12 are accommodated in this order inside the lens holder 7, and the deforming portion 789 of the lens holder 7 is crimped, and the fourth lens group 14, The third lens group 13 and the second lens group 12 are fixed.
  • the liquid composition is applied to a region surrounding the optical path L0 including the region where the recess 77 is formed in the receiving portion 76, and then cured to form the elastic seal member 4.
  • the nozzle 100 is inserted into the recess 77, and in this state, the thermosetting liquid composition R is discharged from the nozzle 100, and FIG. As shown in b), the liquid composition R is filled into the recess 77.
  • the liquid composition R has a high viscosity of, for example, 75 Pa ⁇ s.
  • the liquid composition R may be applied to both sides sandwiching the recess 77.
  • the liquid composition R is applied to a state where the liquid composition R protrudes from the outer positioning portion 783 toward the object side L1 in the optical axis L direction. Thereafter, the liquid composition R is cured by heating, for example, at 120 ° C.
  • the elastic seal member 4 is cured in a state where it protrudes from the outer positioning portion 783 toward the object side L1 in the optical axis L direction.
  • the elastic seal member 4 can be made of an elastic polymer material such as silicone rubber or urethane resin.
  • silicone rubber is used, and the silicone rubber can be peeled from the receiving portion 76.
  • the elastic seal member 4 can be removed from the receiving portion 76 with the cured shape as it is. That is, the elastic seal member 4 does not have adhesiveness to the receiving portion 76.
  • the deformed portion 731 of the third cylindrical portion 73 of the lens holder 7 is crimped.
  • the first lens group 11 is pressed and fixed to the receiving portion 76 while elastically deforming the elastic seal member 4.
  • the elastic seal member 4 is in contact with the first lens group 11 with an area of at least the opening width of the recess 77.
  • the elastic seal member 4 formed by curing the liquid composition R applied to the receiving portion 76 is disposed between the first lens group 11 (lens) and the receiving portion 76 of the lens holder 7.
  • the first lens group 11 is pressed against the receiving portion 76 to elastically deform the elastic seal member 4, thereby sealing between the first lens group 11 and the receiving portion 76.
  • the elastic seal member 4 since the elastic seal member 4 is in contact with the first lens group 11 and the receiving portion 76 with a large area, even if a small foreign matter is present, the sealing performance is not easily impaired.
  • the first lens group 11 is superimposed on the receiving portion 76, so that the first lens group 11 and the receiving portion 76 There will be no situation where the adhesive flows out to the point where it is unnecessary. Moreover, since the recessed part 77 is formed in the receiving part 76 and the elastic seal member 4 is provided also in the inside of this recessed part 77, the position shift of the elastic seal member 4 does not generate
  • the side walls 771 and 772 of the recess 77 are inclined so as to widen the opening width on the opening end side, even when the liquid composition R is applied to the inside of the recess 77, the liquid composition R has a high viscosity. Even so, air hardly remains inside the recess 77. Accordingly, a gap is hardly generated between the inner surface of the recess 77 and the elastic seal member 4, so that the sealing can be surely performed.
  • the elastic seal member 4 can be peeled off from the receiving portion 76 and does not have adhesiveness, if the elastic seal member 4 is defective after the elastic seal member 4 is formed, the elastic seal member 4 is removed. The elastic seal member 4 can be formed again by removing it.
  • the concave portion 77 is composed of an annular concave portion surrounding the optical path L0, it is possible to reliably perform the sealing over the entire circumference.
  • the receiving portion 76 has an outer positioning portion 783 that comes into contact with the first lens group 11 on the object side L1 from the opening position of the concave portion 77. For this reason, it is easy to control the position of the first lens group 11 in the optical axis L direction, and it is easy to control the degree of elastic deformation of the elastic seal member 4.
  • the receiving portion 76 since the receiving portion 76 has an outer stepped portion 781 that is radially outward from the concave portion 77 and directed radially inward, the formation width of the elastic seal member 4 can be regulated by the outer stepped portion 781.
  • the lens holder 7 includes an annular groove 788 that is recessed radially inward from the receiving portion 76 toward the image side L2, and the radially inner portion of the annular groove 788 is deformed when the second lens group 12 is fixed by caulking. Part 789. For this reason, even if the lens holder 7 is caulked, problems such as distortion of the shape of the recess 77 due to the caulking are unlikely to occur.
  • FIG. 3 is an explanatory diagram of the image sensor holder 8 and the like used in the optical unit 1 to which the present invention is applied.
  • FIGS. 3A and 3B show a state in which the substrate 62 is mounted on the image sensor holder 8. It is explanatory drawing, explanatory drawing which shows the edge part of a recessed part, and explanatory drawing which shows the square shape of a recessed part.
  • the lens holder 7 holding the wide-angle lens 10 is combined with the image sensor holder 8 and mounted on the image pickup apparatus.
  • the image sensor holder 8 has a rectangular plate-like portion 81 formed on the image side L2 and a cylindrical portion 83 protruding from the inner edge of the opening 82 formed at the center of the plate-like portion 81 to the object side L1.
  • the lens holder 7 is held inside by a screw mechanism 90 formed on the inner peripheral surface of the cylindrical portion 83 and the outer peripheral surface of the first cylindrical portion 71 of the lens holder 7. As a result, the end of the cylindrical portion 83 comes into contact with the flange portion 75 of the lens holder 7 from the image side L2.
  • the surface facing the image side L2 in the image sensor holder 8 is overlapped around the image sensor 61 with the substrate 62 on which the image sensor 61 is mounted on the object side L1. Therefore, the substrate 62 on which the image sensor 61 is mounted is attached as a receiving portion 86 on the surface facing the image side L2 in the image sensor holder 8.
  • a pair of holes 89 are formed in the plate-like portion 81 of the image sensor holder 8.
  • a hole 629 is formed in the substrate 62 at a position that overlaps with the hole 89 when the substrate 62 is overlapped with the plate-like portion 81 of the image sensor holder 8. Accordingly, as schematically shown in FIG. 1A, if the bolt 91 passing through the hole 629 of the substrate 62 from the image side L2 is stopped in the hole 89 of the plate-like portion 81 of the image sensor holder 8, the substrate 62 is held in the holder. 9 can be fixed.
  • the elastic seal member 5 is interposed between the substrate 62 and the receiving portion 86 of the image sensor holder 8 (the surface on the image side L2 of the plate-like portion 81). Therefore, when the substrate 62 is pressed and fixed by the bolt 91 to the receiving portion 86 of the image sensor holder 8, the elastic seal member 5 is elastically deformed and sealed by the elastic seal member 5. Therefore, foreign matter such as moisture hardly enters from the outside into the inner region 63 (optical path L0) where the image sensor 61 is mounted. In addition, the position of the image sensor 61 in the optical axis L direction can be adjusted by the tightening degree of the bolt 91.
  • a recess 87 is formed in the receiving portion 86 of the image sensor holder 8. Further, the recess 87 is formed at a plurality of locations around the opening 82 that are separated from each other. For this reason, in the plate-like portion 81 of the image sensor holder 8, the thickness of the portion surrounding the recess 87 is substantially equal.
  • the elastic sealing member 5 is cured after the liquid composition is applied to the region surrounding the opening 82 including the region where the recess 87 is formed in the receiving portion 86 before the substrate 62 is provided.
  • the elastic seal member 5 is also formed inside the recess 87 and around the recess 87.
  • the side wall 870 is a tapered surface inclined so as to widen the opening width on the opening end side.
  • the side wall 870 is inclined by about 3 ° with respect to a line (normal line) perpendicular to the bottom portion 873.
  • the portion corresponding to the corner is R-shaped, and the space between the side wall 870 and the bottom 873 is also R-shaped.
  • the side wall 874 located at the end where the opening width is narrowed in the recess 87 is also a tapered surface inclined so as to widen the opening width on the opening end side, The inclination of the side wall 874 is larger than the inclination of the side wall 870.
  • the recess 87 is formed in the shape of a rectangular groove, the portion corresponding to the corner in the planar shape of the recess 87 has an R shape, and the side wall 870 and the bottom 873 The gap is also R-shaped.
  • the liquid composition is applied to a region surrounding the opening 82 including the formation region of the recess 87 in the receiving portion 86, and then cured to form the elastic seal member 5.
  • the nozzle 100 is inserted into the recess 87, and in this state, the thermosetting liquid composition R is discharged from the nozzle 100.
  • the liquid composition R is filled in the recess 87.
  • the liquid composition R has a high viscosity of, for example, 75 Pa ⁇ s.
  • the liquid composition R may be applied to the outer side surrounded by the recess 87. Thereafter, the liquid composition R is cured by heating, for example, at 120 ° C. for 10 to 20 minutes to form the elastic seal member 5 (polymer material).
  • An elastic polymer material such as silicone rubber or urethane resin can be used for the elastic seal member 5 (polymer material).
  • silicone rubber is used. Can be peeled off. Specifically, when there is a problem with the elastic seal member 5, the elastic seal member 5 can be removed from the receiving portion 86 as it is. That is, the elastic seal member 5 does not have adhesiveness to the receiving portion 86.
  • the image sensor holder 8 is attached to the lens holder 7.
  • the bolt 91 is fixed in the fixing step.
  • the substrate 62 is pressed and fixed to the receiving portion 86 while the elastic seal member 5 is elastically deformed.
  • the elastic seal member 5 is in contact with the substrate 62 with an area of at least the opening width of the recess 87.
  • the elastic seal member 5 obtained by curing the liquid composition R applied to the receiving portion 86 is interposed between the substrate 62 and the receiving portion 86 of the imaging element holder 8, and the substrate 62 is pressed against the receiving portion 86 to elastically deform the elastic seal member 5, thereby sealing between the substrate 62 and the receiving portion 86.
  • the elastic sealing member 5 since the elastic sealing member 5 is in contact with the substrate 62 and the receiving portion 86 with a large area, the sealing performance is not easily impaired even if a small foreign matter is present.
  • the substrate 62 is stacked on the receiving portion 86, so that the adhesive travels between the substrate 62 and the receiving portion 86. Does not occur to the point where it is unnecessary.
  • the recessed part 87 is formed in the receiving part 86 and the elastic seal member 5 is provided also in this recessed part 87, the position shift of the elastic seal member 5 does not generate
  • the side wall 870 of the recess 87 is inclined so as to widen the opening width on the opening end side, even when the liquid composition R is applied to the inside of the recess 87, the liquid composition R has a high viscosity. However, it is difficult for air to remain inside the recess 87. Therefore, a gap is hardly generated between the inner surface of the recess 87 and the elastic seal member 5, so that the sealing can be surely performed.
  • the elastic seal member 5 can be peeled off from the receiving portion 86 and does not have adhesiveness, if the elastic seal member 5 is defective after the elastic seal member 5 is formed, the elastic seal member 5 is removed. The elastic seal member 5 can be formed again by removing it.
  • the recessed part 87 is formed in several places, and the thickness of the part surrounding the recessed part 87 is substantially equal. Therefore, when the imaging element holder 8 is resin-molded, a reduction in dimensional accuracy due to resin sink is unlikely to occur. Moreover, although the recessed part 87 is formed in the several place mutually spaced apart, the liquid composition R apply
  • FIG. 4 is an explanatory diagram of Modification 1 of the lens holder 7 used in the optical unit 1 to which the present invention is applied. Since the basic configuration of this example and later-described modification examples 2 and 3 is the same as the example shown in FIG. 1B, common portions are denoted by the same reference numerals, and description thereof is omitted. Omitted.
  • the bottom 773 of the recess 77 (annular recess) is located closer to the object side L1 than between the second lens group 12 and the third lens group 13 in the optical axis L direction.
  • the bottom 773 of the recess 77 is positioned on the image side L2 from between the second lens group 12 and the third lens group 13 in the optical axis L direction.
  • the thickness of the bottom portion 773 of the concave portion 77 is the thickness of any portion positioned radially inward of the concave portion 77 and any thickness positioned radially outward of the concave portion 77. It is equal to the thickness of the part. According to such a configuration, since the thickness of the lens holder 7 can be equalized by the concave portion 77, the sink at the time of resin molding of the lens holder 7 can be suppressed.
  • FIG. 5 is an explanatory diagram of a second modification of the lens holder 7 used in the optical unit 1 to which the present invention is applied.
  • the first lens group 11 is positioned in the direction of the optical axis L only by the outer positioning portion 783.
  • the outer peripheral side end of the first lens group 11 at the object side L1 from the opening position of the concave portion 77 An annular outer positioning portion 783 is formed in contact with this portion to position the first lens group 11 in the optical axis L direction.
  • the first lens group is in contact with the outer peripheral side end portion of the first lens group 11 on the object side L 1 from the opening position of the concave portion 77 between the concave portion 77 and the annular groove 788.
  • An annular inner positioning portion 784 is formed to position 11 in the optical axis L direction. For this reason, the first lens group 11 can be reliably positioned in the optical axis L direction.
  • annular outer stepped portion 781 facing radially inward is formed by the outer positioning portion 783 on the radially outer side from the recess 77, and radially outward by the inner positioning portion 784 on the radially inner side from the recess 77.
  • An annular inner step 782 is formed.
  • FIG. 6 is an explanatory diagram of a third modification of the lens holder 7 used in the optical unit 1 to which the present invention is applied.
  • the side walls 771 and 772 of the recess 77 are both inclined to the opening edge of the recess 77 and have a symmetrical shape.
  • the side wall 771 is inclined to the opening edge of the recess 77, whereas the side wall 772 is halfway Although it is inclined to the position, it is not inclined from the middle to the opening edge, and is orthogonal to the bottom 773.
  • the side wall 772 is inclined to a midway position, but is integrated with the deformed portion 789 from the midway to the opening edge. Therefore, the receiving portion 76 can be simplified, and the opening width of the concave portion 77 can be maintained even when the optical unit 1 is reduced in the radial direction or the second lens group 12 is increased in diameter. .

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  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Lens Barrels (AREA)

Abstract

L'invention concerne : un procédé qui permet de fabriquer une unité optique et qui peut assurer une étanchéité appropriée entre une lentille et un support de lentille ; et une unité optique. Lors de la mise en place d'un élément d'étanchéité élastique (4) autour de la trajectoire optique (L0) de la section de réception (76) du support de lentille (7), une concavité annulaire (77) est formée au niveau de la section de réception (76), s'ouvre vers un premier groupe de lentilles (11), et est dotée de parois latérales (771, 772) inclinées d'une manière à élargir l'ouverture sur le côté d'extrémité de l'ouverture. En outre, une fois qu'une composition liquide est appliquée à la région encerclant la périphérie du trajet optique (L0) et comprenant la zone au niveau de laquelle la concavité (77) a été formée sur la section de réception (76), la composition liquide est durcie pour former un élément d'étanchéité élastique (4). Ensuite, le premier groupe de lentilles (11) est pressé contre la section de réception (76) et est fixé tout en amenant l'élément d'étanchéité élastique (4) à être déformé élastiquement. L'élément d'étanchéité élastique (4) comprend un caoutchouc de silicone ou analogue, et peut se détacher de la section de réception (76).
PCT/JP2015/053699 2014-02-10 2015-02-10 Procédé de fabrication d'unité optique et unité optique WO2015119296A1 (fr)

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JP2017138523A (ja) * 2016-02-05 2017-08-10 日本電産サンキョー株式会社 レンズユニット
JP2019144532A (ja) * 2018-02-19 2019-08-29 日本電産サンキョー株式会社 レンズユニット
CN110398873A (zh) * 2019-07-05 2019-11-01 中影巴可（北京）电子有限公司 一种用于数字放映机的光路密封装置及其光路系统
CN113196164A (zh) * 2019-02-26 2021-07-30 麦克赛尔株式会社 透镜单元和摄像机模块

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JPS62188723U (fr) * 1986-05-21 1987-12-01
JPH1028669A (ja) * 1996-07-16 1998-02-03 Olympus Optical Co Ltd 内視鏡装置
JPH1119028A (ja) * 1997-06-30 1999-01-26 Olympus Optical Co Ltd 内視鏡
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JP2017138523A (ja) * 2016-02-05 2017-08-10 日本電産サンキョー株式会社 レンズユニット
JP2019144532A (ja) * 2018-02-19 2019-08-29 日本電産サンキョー株式会社 レンズユニット
CN113196164A (zh) * 2019-02-26 2021-07-30 麦克赛尔株式会社 透镜单元和摄像机模块
CN113196164B (zh) * 2019-02-26 2024-03-08 麦克赛尔株式会社 透镜单元和摄像机模块
CN110398873A (zh) * 2019-07-05 2019-11-01 中影巴可（北京）电子有限公司 一种用于数字放映机的光路密封装置及其光路系统

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