ANNULAR OPTICAL COMPONENT, CAMERA LENS AND IMAGE CAPTURING UNIT

• US 20190324267A1
• Filed: 06/29/2018
• Published: 10/24/2019
• Est. Priority Date: 04/20/2018
• Status: Active Grant

• Current Assignee: Largan Precision Co Limited (Largan Precision)
• Original Assignee: Largan Precision Co Limited (Largan Precision)
• Inventors: CHANG, Ming-Shun, CHIU, Yu-Jen, CHOU, Ming-Ta
• Granted Patent: US 10,908,415 B2
• Time in Patent Office: Days
• CPC Class Codes: G02B 13/00 Optical objectives specially designed for the purposes specified below with variable magnification in general G02B15/00
• CPC Class Codes: G02B 27/0018 with means for preventing ghost images anti-reflection coatings G02B1/11
• CPC Class Codes: G02B 7/02 for lenses supports for magnifying lenses G02B25/002
• CPC Class Codes: G02B 7/021 for more than one lens
• CPC Class Codes: G03B 13/36 Autofocus systems
• CPC Class Codes: G03B 17/02 Bodies
• CPC Class Codes: G03B 17/12 with means for supporting objectives, supplementary lenses, filters, masks, or turrets
• CPC Class Codes: G03B 5/00 Adjustment of optical system relative to image or object surface other than for focusing
• CPC Class Codes: G03B 9/02 Diaphragms

Abstract

An annular optical component includes a plastic element and a metal element disposed on the plastic element. The plastic element includes a plastic part, and the metal element includes a metal part. The plastic part surrounds a central axis of the annular optical component so as to form a central opening. An outer annular surface and an inner annular surface of the annular optical component are opposite to each other. An object-side surface of the annular optical component faces an image-side direction of the annular optical component and is connected to the outer annular surface and the inner annular surface. An image-side surface of the annular optical component faces an image-side direction of the annular optical component and is connected to the outer annular surface and the inner annular surface. The image-side surface and the object-side surface are opposite to each other.

Claims

1. An annular optical component, comprising a plastic element and a metal element disposed on the plastic element, the plastic element comprising a plastic part, and the metal element comprising a metal part;

wherein the plastic part comprises at least part of an inner annular surface of the annular optical component, the plastic part surrounds a central axis of the annular optical component so as to form a central opening, at least part of the metal part comprises at least part of an outer annular surface of the annular optical component, the outer annular surface and the inner annular surface are opposite to each other, an object-side surface of the annular optical component faces an object side direction of the annular optical component and is connected to the outer annular surface and the inner annular surface, an image-side surface of the annular optical component faces an image-side direction of the annular optical component and is connected to the outer annular surface and the inner annular surface, and the image-side surface and the object-side surface are opposite to each other;

wherein a thickness of the metal part on the outer annular surface is d, the maximum thickness of the annular optical component is t, and the following condition is satisfied;

0.05<

d/t<

1.0.

2. The annular optical component of claim 1, wherein the metal element is insert-molded with the plastic element.

3. The annular optical component of claim 2, wherein the metal element comprises at least one folding structure.

4. The annular optical component of claim 3, wherein the quantity of the at least one folding structure is equal to or larger than two.

5. The annular optical component of claim 4, wherein a distance between the at least one folding structures in a direction perpendicular to the central axis of the annular optical component is s, the thickness of the metal part on the outer annular surface is d, and the following condition is satisfied:

0.6<

s/d<

3.0.

6. The annular optical component of claim 2, wherein the metal part of the metal element extends from the outer annular surface to at least one of the object-side surface and the image-side surface, and the metal part on one of the object-side surface and the image-side surface is exposed.

7. The annular optical component of claim 6, wherein the metal part extends from the outer annular surface only to one of the object-side surface and the image-side surface.

8. The annular optical component of claim 1, wherein the plastic element comprises a chemical compound fiber.

9. A camera lens, comprising the annular optical component of claim 1 and an imaging lens assembly, wherein the annular optical component is disposed in the imaging lens assembly.

10. The camera lens of claim 9, wherein the imaging lens assembly comprises an object-side lens element and an image-side lens element, and the annular optical component is disposed between the object-side lens element and the image-side lens element.

11. The camera lens of claim 10, further comprising a light blocking film which is disposed between the image-side lens element and the annular optical component.

12. The camera lens of claim 11, wherein the central opening of the annular optical component is tapered from the image-side surface to the object-side surface.

13. The camera lens of claim 11, wherein the thickness of the metal part on the outer annular surface is d, the maximum thickness of the annular optical component is t, and the following condition is satisfied:

0.05<

d/t<

0.6.

14. The camera lens of claim 11, wherein the plastic part of the plastic element comprises the entire inner annular surface of the annular optical component.

15. A camera lens, comprising:

an imaging lens assembly comprising an object-side lens element and an image-side lens element; and

an annular optical component disposed between the object-side lens element and the image-side lens element, the object-side lens element disposed on an object-side direction of the annular optical component, the image-side lens element disposed on an object-side direction of the annular optical component, the annular optical component comprising a plastic element and a metal element disposed on the plastic element, the plastic element comprising a plastic part, and the metal element comprising a metal part;

wherein the plastic part comprises at least part of an inner annular surface of the annular optical component, the plastic part surrounds a central axis of the annular optical component so as to form a central opening, an outer annular surface of the annular optical component and the inner annular surface are opposite to each other, an object-side surface of the annular optical component faces an object-side direction of the annular optical component and is connected to the outer annular surface and the inner annular surface, an image-side surface of the annular optical component faces an image-side direction of the annular optical component and is connected to the outer annular surface and the inner annular surface, and the image-side surface and the object-side surface are opposite to each other;

wherein the metal part of the metal element extends from the outer annular surface to at least one of the object-side surface and the image-side surface, and the metal part on one of the object-side surface and the image-side surface is exposed.

16. The camera lens of claim 15, wherein the metal element comprises at least one folding structure.

17. The camera lens of claim 15, wherein the annular optical component further comprises an axially assembled structure which is located on the object-side surface or the image-side surface, the annular optical component is disposed on the imaging lens assembly via the axially assembled structure, and a center of the object-side lens element or the image-side lens element of the imaging lens assembly which is adjacent to the annular optical component is aligned with a center of the annular optical component by the axially assembled structure.

18. The camera lens of claim 15, wherein a thickness of the metal part on the outer annular surface is d, the maximum thickness of the annular optical component is t, and the following condition is satisfied:

0.05<

d/t<

1.0.

19. The camera lens of claim 15, wherein the metal element comprises at least two folding structures.

20. The camera lens of claim 19, wherein a distance between the at least two folding structures in a direction perpendicular to the central axis of the annular optical component is s, the maximum thickness of the annular optical component is t, and following condition is satisfied

0.05<

s/t<

1.0.

21. The camera lens of claim 15, further comprising a light blocking film which is disposed between the image-side lens element and the annular optical component.

22. The camera lens of claim 21, wherein the central opening of the annular optical component is tapered from the image-side surface to the object-side surface.

23. An annular optical component, comprising a plastic element and a metal element, the metal element being insert-molded with the plastic element, the plastic element comprising a plastic part, and the metal element comprising at least one folding structure;

wherein the plastic part comprises at least part of an inner annular surface of the annular optical component, the plastic part surrounds a central axis of the annular optical component so as to form a central opening, an outer annular surface of the annular optical component and the inner annular surface are opposite to each other, an object-side surface of the annular optical component faces an object-side direction of the annular optical component and is connected to the outer annular surface and the inner annular surface, an image-side surface of the annular optical component faces an image-side direction of the annular optical component and is connected to the outer annular surface and the inner annular surface, and the image-side surface and the object-side surface are opposite to each other.

24. The annular optical component of claim 23, wherein the annular optical component further comprises an axially assembled structure which is located on the object-side surface or the image-side surface, the annular optical component is disposed on the imaging lens assembly via the axially assembled structure, and a center of the object-side lens element or the image-side lens element of the imaging lens assembly is aligned with a center of the annular optical component by the axially assembled structure.

25. The annular optical component of claim 23, wherein the quantity of the at least one folding structure is equal to or larger than two.

26. The annular optical component of claim 25, wherein a distance between the at least one folding structures in a direction perpendicular to the central axis of the annular optical component is s, the maximum thickness of the annular optical component is t, and the following condition is satisfied:

0.05<

s/t<

1.0.

27. The annular optical component of claim 23, wherein the metal element further comprises a metal part, the metal part extends from the outer annular surface to at least one of the object-side surface and the image-side surface, and the metal part on one of the object-side surface and the image-side surface is exposed.