Optical lens, lens unit, imaging module, electronic apparatus, injection molding mold and injection molding method

Patent metadata

Field	Value
Publication number	US-2016377828-A1
Application number	US-201615259611-A
Country	US
Kind code	A1
Filing date	Sep 8, 2016
Priority date	Mar 18, 2014
Publication date	Dec 29, 2016
Grant date	—

Abstract

The optical lens 10 includes: an optical function portion 12 having optical functions; and a flange portion 14 formed around the optical function portion 12 . The flange portion 14 has, on a side surface thereof, a cut section 42 which is formed by cutting a gate portion 16 . In a case where the following are viewed from the optical axis direction of the optical lens 10 , a thinnest portion 18 in a region 44 surrounded by lines L 1 and L 2 , which respectively connect both ends 42 a and 42 b of the cut section 42 to the optical axis center O of the optical lens 10 , and a line L 3 , which connects both ends 42 a and 42 b , is present in the optical function portion 12 . The flange portion 14 has a concave portion 40 outside the region 44.

First claim

What is claimed is:

1 . An optical lens comprising:
an optical function portion that has an optical function; and a flange portion that is formed around the optical function portion, wherein the flange portion has a cut section, which is formed by cutting a gate portion, on a side surface thereof, wherein in a case where the following are viewed from a direction of an optical axis of the optical lens, a thinnest portion in a region surrounded by two lines, which connect both ends of the cut section and a center of the optical axis of the optical lens, and a single line, which connects both ends of the cut section, is present in the optical function portion, and wherein the flange portion has a concave portion outside the region, wherein if a thickness of the thinnest portion is T1, a thickness of the flange portion in the concave portion is T2, an area of the flange portion in a case where it is assumed that the concave portion is not provided on a surface on which the concave portion should be provided in the flange portion is S 1 , and an area occupied by the concave portion on the surface on which the concave portion is provided in the flange portion is S2, the following are satisfied.
T 2/ T 1≦(8/3)×( S 2/ S 1)−0.2,

T 2/ T 1≧0.6, and

S 2/ S 1≦0.6.

2 . The optical lens according to claim 1 , wherein a central angle, which is formed by two lines connecting the center of the optical axis and two respective end portions of the concave portion disposed at a position where a central point of the cut section is interposed therebetween in a case where the cut section is viewed from the direction of the optical axis of the optical lens, is equal to or less than 60°.

3 . The optical lens according to claim 1 , wherein a thickness of the flange portion in the concave portion is equal to or less than 1.4 times a thickness of the thinnest portion.

4 . The optical lens according to claim 1 , wherein the thickness of the flange portion in the concave portion is equal to or less than 1.2 times the thickness of the thinnest portion.

5 . The optical lens according to claim 1 , wherein an inner peripheral surface of the concave portion is oblique to a direction which is perpendicular to the surface on which the concave portion is provided in the flange portion.

6 . The optical lens according to claim 5 , wherein an angle of inclination a formed between the inner peripheral surface of the concave portion and a direction, which is perpendicular to the surface on which the concave portion is provided in the flange portion, satisfies 0<α≦15°.

7 . The optical lens according to claim 1 , wherein a shape, which is viewed from the direction of the optical axis of the concave portion on the surface on which the concave portion is provided in the flange portion, has a curve shape at an end portion at least close to the cut section between end portions of the concave portion in a circumferential direction of the flange portion.

8 . The optical lens according to claim 1 ,
wherein the flange portion has a plurality of the concave portions, and wherein the plurality of the concave portions are provided in the flange portion so as to be line-symmetric with respect to an axis passing through the center of the optical axis of the optical lens and the center of the cut section in the flange portion.

9 . A lens unit comprising at least one optical lens according to claim 1 ,
wherein at least a part of a region other than the concave portions on surfaces having the concave portions of the flange portion of the optical lens is in contact with any of a different optical lens, a light blocking plate, a lens barrel, and a spacing ring.

10 . An imaging module comprising:
the lens unit according to claim 9 ; and an imaging element that captures an image of a subject through the optical lens of the lens unit.

11 . The imaging module according to claim 10 , wherein a pixel pitch of the imaging element is equal to or less than 1 μm.

12 . An electronic apparatus comprising the imaging module according to claim 10 .

Assignees

• Fujifilm Corp

Inventors

• Ito Hidekane

Classifications

• G02B7/022 Primary

  lens and mount having complementary engagement means, e.g. screw/thread · CPC title

• G02B13/001

  Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras (G02B23/243 takes precedence) · CPC title

• B29D11/0048

  Moulds for lenses (moulds for plastic articles in general B29C33/00) · CPC title

• B29D11/00538

  Feeding arrangements · CPC title

• G02B13/0045

  having five or more lenses · CPC title