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Lens unit and manufacturing method

A lens unit and lens technology, applied in optical components, installation, optics, etc., can solve problems such as deformation of the lens receiving surface, relative position deviation and height deviation between the mirror base and the glass lens, and achieve the effect of improving optical performance

Pending Publication Date: 2019-01-04
NIDEC SANKYO (DONGGUAN) PRECISION CORPORATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In general, the positioning of the glass lens and the mirror base in the height direction is carried out through the contact between the mirror base and the glass lens, but there are the following technical problems: (1) the precision of the parts of the mirror base is required; (2) due to the gap between the glass lens and the mirror base The relative position of the mirror holder and the glass lens is deviated due to part tolerance; (3) The lens receiving surface of the mirror holder is deformed when the lens is assembled, resulting in a deviation of height

Method used

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  • Lens unit and manufacturing method
  • Lens unit and manufacturing method

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Experimental program
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Effect test

no. 1 approach

[0080] figure 1 shows the whole of the lens unit 1 of the present embodiment, figure 1 (a) is a stereogram, figure 1 (b) is the main view, figure 1 (c) is a longitudinal sectional view.

[0081] The lens unit 1 is a lens unit incorporated in a vehicle-mounted peripheral monitoring camera, a monitoring camera, an intercom system, and the like. In addition, the "object side L1" and "image side L2" in the present invention refer to the object side and the image side in the optical axis L direction, and the "optical axis direction" refers to a direction parallel to the optical axis L.

[0082] (the whole frame)

[0083] The lens unit 1 includes: a wide-angle lens 2 composed of a plurality of lenses; and a lens barrel 3 that accommodates the wide-angle lens 2 . The wide-angle lens 2 is composed of a first lens 21, a second lens 22, a third lens 23, a fourth lens 24, a fifth lens 25, and a sixth lens 26, which are closely arranged along the optical axis L from the object side L...

no. 2 approach

[0137] This embodiment shows a modified example of the shape of the mirror holder 4 of the first embodiment. Figure 9 It is a figure which shows the lens holder 104 and the 4th lens 24 which were press-fitted in this embodiment, and shows the state before reinforcement with an adhesive agent. Figure 9 (a) is a top view, Figure 9 (b) is a side view, Figure 9 (c) is Figure 9 X3-X3 sectional view of (a). Here, configurations different from those of the mirror holder 4 of the first embodiment will be mainly described.

[0138] Like the mirror mount 4 of the first embodiment, the object-side flat surface 141 includes an outer-edge-side flat surface 143 and an inner-edge-side flat surface 144 , and a cylindrical portion 150 is formed at the center thereof. In the same positions as in the first embodiment, the adhesive groove 145 on the inner edge side plane 144 and the press-fitting portion 153 on the cylindrical side surface 151 are formed at three places, respectively.

...

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Abstract

Disclosed are a lens unit and a method of manufacturing the same, which improve the optical performance of a lens unit in which a plurality of lens arrangements are arranged and held inside the lens barrel. A cylindrical portion (50) penetrating from an object side plane (41) to an image side plane (42) is provided at the center of a lens holder (4). A fourth lens (24) is pressed into the cylindrical portion (50) to be fixed. From the point of strengthening a fixed attachment point, adhesive (99) is used. Press-fitting portions (53) extending are formed at equal intervals in the optical axis direction of the lens holder (4) at three positions on the cylindrical portion side surface (51) of the cylindrical portion (50). A fourth lens (24) is pressed into the press-fitting portions (53) andfixed. An annular projection (52) that protrudes inward in the radial direction by a predetermined length is formed in the opening portion of the image side plane (42) of the cylindrical portion (50),and is spaced apart from the fourth lens (24) and covers the outer edge.

Description

technical field [0001] The present invention relates to a lens unit and a method of manufacturing the lens unit, and relates to a lens unit including, for example, a plurality of lenses and a barrel for holding the plurality of lenses, and a method of manufacturing the lens unit. Background technique [0002] In a lens unit in which a plurality of lenses are arranged and held inside a lens barrel, a lens holder made of resin or metal may be used for assembling a glass lens (for example, refer to Patent Document 1). That is, the glass lens is arranged inside the lens barrel in a state of being fitted into the lens mount. [0003] prior art literature [0004] Patent Document 1: Japanese Patent Laid-Open No. 2014-170123 [0005] Generally speaking, the positioning of the glass lens and the mirror base in the height direction is carried out through the contact between the mirror base and the glass lens, but there are the following technical problems: (1) the accuracy of the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B7/02
CPCG02B7/021G02B13/0045G02B7/025G02B7/026
Inventor 白鸟敏男
Owner NIDEC SANKYO (DONGGUAN) PRECISION CORPORATION
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