TWM503582U - Optical lens assembly - Google Patents

Description

Optical lens set

This creation is related to optical devices; in particular, an optical lens set.

With the advancement of optical technology, optical devices such as cameras, cameras, and projectors are becoming more and more popular, and the most important influence on the optical performance of the above optical devices is the design of the optical lens group used.

In general, the main components of an optical lens unit usually include an external lens barrel and an optical lens disposed inside, and which directly affects the optical performance of the optical lens group, in addition to the optical design of the optical lens, The other is the error of the relative position between the optical lenses. When the error is smaller, the closer to the preset state of the design, the closer the optical lens group is to the ideal.

However, the industry generally allows the tolerance of the inner diameter of the lens barrel to fall to about 0.005 mm. However, as the optical lens group becomes more compact, the 0.005 mm error has seriously affected the relative position between the lenses. In turn, the optical imaging quality of the optical lens group is affected, and the optical performance of the optical lens group is not designed to meet the needs of the user.

In view of this, the purpose of the present invention is to provide an optical lens assembly that allows the tolerance of the inner diameter of the lens barrel to affect the relative position between the lenses when assembling the optical lens, thereby greatly reducing the tolerance of the lens barrel to the optical performance. ring.

In order to achieve the above objectives, the optical lens set provided by this creation The utility model comprises a lens barrel, a first lens, a second lens and a third lens. Wherein, the lens barrel has one side hole and one side hole in the opposite position. The first lens is disposed in the lens barrel, and an outer circumference of the first mirror is coupled to the inner cylinder wall of the lens barrel to fix a radial relative position between the first lens and the lens barrel; The first lens has a first mirror surface facing the object side hole, and a second mirror surface facing the image side hole, and a surface of the side of the second mirror surface has a first positioning surface and a first reference surface surrounds the first lens Two mirror settings. The second lens is located in the lens barrel, and has a third mirror surface facing the object side hole, and a fourth mirror surface facing the image side hole, and a surface of the side of the third mirror surface has a second positioning surface and a a second reference surface is disposed around the third mirror surface; the second positioning surface is in contact with the first positioning surface to fix a radial relative position between the third mirror surface and the second mirror surface, and the second lens is a gap is formed between the inner cylinder walls of the lens barrel; the second reference surface is in contact with the first reference surface to fix an axial relative position between the third mirror surface and the second mirror surface; The surface on the side of the mirror surface has a third positioning surface and a third reference surface is disposed around the fourth mirror surface. The third lens is located in the lens barrel, and has a fifth mirror surface facing the object side hole, and a sixth mirror surface facing the image side hole, and a surface of the side of the fifth mirror surface has a fourth positioning surface and a a fourth reference surface is disposed around the fifth mirror surface; the fourth positioning surface is in contact with the third positioning surface to fix a radial relative position between the fifth mirror surface and the fourth mirror surface, and the third lens is A gap is formed between the inner cylinder walls of the lens barrel; the fourth reference surface is in contact with the third reference surface to fix the axial relative position between the fifth mirror surface and the fourth mirror surface.

Thereby, the above design is based on the corresponding structure on the lens. Interacting with each other to achieve the relative position between the fixed lenses, the tolerance of the inner diameter of the lens barrel does not affect the relative position between the lenses when the optical lens is assembled. This greatly reduces the effect of lens tolerance on optical performance.

100‧‧‧Optical lens group

10‧‧‧Mirror tube

12‧‧‧Side side hole

14‧‧‧like side holes

20‧‧‧ first lens

21‧‧‧ first mirror

22‧‧‧Second mirror

23‧‧‧First positioning surface

24‧‧‧ first datum

30‧‧‧second lens

31‧‧‧ Third mirror

32‧‧‧Four mirror

33‧‧‧Second positioning surface

34‧‧‧second datum

35‧‧‧ third datum

36‧‧‧ third positioning surface

40‧‧‧ third lens

41‧‧‧ fifth mirror

42‧‧‧ sixth mirror

43‧‧‧Fourth datum

44‧‧‧Four positioning surface

D1, D2‧‧‧ gap

51, 52‧‧ ‧ shading ring

53‧‧‧Fixed ring

60‧‧‧Fourth lens

1 is a perspective view of an optical lens unit of the preferred embodiment of the present invention.

Figure 2 is an exploded view of Figure 1.

Figure 3 is a cross-sectional view of Figure 1 taken along the line A-A.

In order to explain the present invention more clearly, the preferred embodiment is described in detail with reference to the drawings. As shown in FIG. 1 to FIG. 3, the optical lens assembly 100 of the preferred embodiment includes a lens barrel 10. A first lens 20, a second lens 30, a third lens 40, two light shielding rings 51-52, a fixing ring 53 and a fourth lens 60. Wherein: the lens barrel 10 is hollow, and opposite ends thereof respectively have an object side hole 12 and an image side hole 14 communicate with the inside of the lens barrel 10.

The first lens 20 is disposed in the lens barrel 10, and the first lens 20 has a first mirror surface 21 facing the object side hole 12 and a second mirror surface 22 facing the image side hole 14, and the second mirror surface The surface of the side of the side of the 22 surface has a first positioning surface 23 and a first reference surface 24 disposed around the second mirror surface 22 , and the first positioning surface 23 is closer to the second mirror surface 22 than the first reference surface 24 , and The first positioning surface 23 is a sloped surface in this embodiment. In addition, the outer circumference of the first lens 20 is in contact with the inner cylinder wall of the lens barrel 10 to fix the radial relative position between the first lens 20 and the lens barrel 10, and the first lens 20 is transparent. The surface on the side of the first mirror surface 21 abuts against the inner side of the lens barrel 10 to achieve the purpose of fixing the position of the first lens 20 in the lens barrel 10.

The light shielding rings 51 and 52 are made of materials having opacity characteristics. It is made and has an annular shape, and the light-shielding rings 51 and 52 have a hole at their center positions.

The second lens 30 is located in the lens barrel 10 and has a first The third mirror surface 31 faces the object side hole 12 and a fourth mirror surface 32 faces the image side hole 14 , and the surface of the side of the third mirror surface 31 has a second positioning surface 33 and a second reference surface 34 surrounding the image plane side hole The third mirror surface 31 is disposed, and the second positioning surface 33 is closer to the third mirror surface 32 than the second reference surface 34, and the second positioning surface 33 is an inclined angle and the first positioning surface 23 in this embodiment. Complementary slopes. In addition, a surface of the side of the fourth mirror surface 32 has a third reference surface 35 and a third positioning surface 36 disposed around the fourth mirror surface 32, and the third reference surface 35 is closer to the third positioning surface 36. The fourth mirror surface 32, and in the embodiment, the third positioning surface 36 is also a slope, and the third reference surface 35 and the second reference surface 34 are parallel to each other.

In this way, when assembling, the shading ring 51 can be set first. On the surface of the first lens 20 on the side of the second mirror surface 22, the hole of the light shielding ring 51 is directed to the second mirror surface 22. Then, the second positioning surface 33 is abutted against the first positioning surface 23, so that the second lens 30 is restricted by the first lens 20, and the diameter between the third mirror surface 31 and the second mirror surface 22 is fixed. A gap D1 is formed between the second lens 30 and the inner wall of the lens barrel 10 without contacting the lens barrel 10, and the second reference surface 34 is in contact with the first reference surface 24. And fixing the axial relative position between the third mirror surface and the second mirror surface such that the light shielding ring 51 is located between the first lens 20 and the second lens 30.

The third lens 40 is located in the lens barrel 10 and has a first A fifth mirror surface 41 faces the object side hole 12 and a sixth mirror surface 42 faces the image side hole 14, and a surface of the side of the fifth mirror surface 51 has a fourth reference surface 43 and a fourth positioning surface 44. The fifth mirror surface 41 is disposed, and the fourth reference surface 43 is closer to the fifth mirror surface 42 than the fourth positioning surface 44, and In the embodiment, the fourth positioning surface 44 is a slope which is complementary to the third positioning surface 36.

In this way, when assembling, the shading ring 52 can be set first. On the surface of the second lens 30 on the side of the fourth mirror surface 32, the hole of the light shielding ring 52 is directed to the fourth mirror surface 32. Then, the fourth positioning surface 44 is abutted against the third positioning surface 36, so that the third lens 40 is restricted by the second lens 30, and the diameter between the fifth mirror surface 41 and the fourth mirror surface 32 is fixed. A gap D2 is formed between the third lens 40 and the inner wall of the lens barrel 10 without contacting the lens barrel 10, and the fourth reference surface 43 is in contact with the third reference surface 34. The axial position between the fifth mirror surface 41 and the fourth mirror surface 32 is fixed such that the light shielding ring 52 is located between the second lens 30 and the third lens 20.

The fixing ring 53 is made of a hard material and has an annular shape, and The retaining ring 53 has a hole at a central position. After the first lens 20 to the third lens 30 are assembled into the lens barrel 10, the fixing ring 53 can be inserted into the lens barrel 10, and the fixing ring 53 is pressed against the third lens 40. The surface of the side of the sixth mirror surface 42 is located, and the hole of the fixing ring 53 is opposite to the six mirror surface 42 except for the purpose of fixing the lenses 20, 30, 40 in the lens barrel 10, the fixing ring The aperture of 53 also allows light to pass without affecting the optical performance of the optical lens assembly 100.

The fourth lens 60 is disposed in the lens barrel 10, and is The fixing ring 53 is adjacent to the image side hole 14 and is in contact with the fixing ring 53 so that the fixing ring 53 is located between the third lens 40 and the fourth lens 60, and the fourth lens 60 is designed to The aberration is improved to enhance the optical performance of the optical lens group 100.

In this way, through the above-mentioned lenses 20, 30, 40 The corresponding structures are connected to each other to achieve the purpose of firmly fixing the relative positions between the lenses 20, 30, 40, and the tolerance of the lens barrel 10 can be made. The relative positions of the lenses 20, 30, 40 are not affected, and the error between the relative positions of the lenses 20, 30, 40 can be less than 0.002 mm, thereby greatly enhancing the optical The optical performance of the lens set 100.

Of course, in the actual application, the positions of the positioning surfaces and the reference surfaces are not limited to the positions disclosed in the above embodiments, and the above description is only a preferred embodiment of the present invention. Equivalent changes in the scope of this creation and the scope of the patent application are intended to be included in the scope of this patent.

10‧‧‧Mirror tube

12‧‧‧Side side hole

14‧‧‧like side holes

20‧‧‧ first lens

21‧‧‧ first mirror

22‧‧‧Second mirror

23‧‧‧First positioning surface

24‧‧‧ first datum

30‧‧‧second lens

31‧‧‧ Third mirror

32‧‧‧Four mirror

33‧‧‧Second positioning surface

34‧‧‧second datum

35‧‧‧ third datum

36‧‧‧ third positioning surface

40‧‧‧ third lens

41‧‧‧ fifth mirror

42‧‧‧ sixth mirror

43‧‧‧Fourth datum

44‧‧‧Four positioning surface

D1, D2‧‧‧ gap

51, 52‧‧ ‧ shading ring

53‧‧‧Fixed ring

60‧‧‧Fourth lens

Claims (10)

An optical lens assembly comprising: a lens barrel having an object side hole at an opposite position and an image side hole; a first lens disposed in the lens barrel; and an outer circumference of the first lens and the lens barrel The inner cylinder wall is abutted to fix a radial relative position between the first lens and the lens barrel; further, the first lens has a first mirror surface facing the object side hole, and a second mirror surface facing the image side a hole, and a surface of the side of the second mirror surface has a first positioning surface and a first reference surface is disposed around the second mirror surface; a second lens is located in the lens barrel and has a third mirror surface facing the object a side hole, and a fourth mirror surface facing the image side hole, and a surface of the side of the third mirror surface has a second positioning surface and a second reference surface is disposed around the third mirror surface; the second positioning surface and the second positioning surface The first positioning surface is abutted to fix a radial relative position between the third mirror surface and the second mirror surface, and a gap is formed between the second lens and the inner cylinder wall of the lens barrel; the second reference surface Abutting the first reference surface to fix the third An axially opposite position between the surface and the second mirror surface; further, a surface on a side of the fourth mirror surface has a third positioning surface and a third reference surface is disposed around the fourth mirror surface; and a third lens, The lens barrel is disposed in the lens barrel, and has a fifth mirror surface facing the object side hole, and a sixth mirror surface facing the image side hole, and a surface of the side of the fifth mirror surface has a fourth positioning surface and a fourth reference surface. Surrounding the fifth mirror surface; the fourth positioning surface is in contact with the third positioning surface to fix a radial relative position between the fifth mirror surface and the fourth mirror surface, and A gap is formed between the third lens and the inner cylinder wall of the lens barrel; the fourth reference surface is in contact with the third reference surface to fix the axial relative position between the fifth mirror surface and the fourth mirror surface. The optical lens assembly of claim 1, wherein the first positioning surface is closer to the second mirror surface than the first reference surface, and the second positioning surface is closer to the third mirror surface than the second reference surface. The optical lens assembly of claim 1, wherein the first positioning surface and the second positioning surface are respectively inclined surfaces, and the first positioning surface and the second positioning surface are complementary to each other. The optical lens unit of claim 1, wherein the third reference surface is closer to the fifth mirror than the third positioning surface, and the fourth reference surface is closer to the sixth mirror than the fourth positioning surface. The optical lens unit of claim 1, wherein the third positioning surface and the fourth positioning surface are each a slope, and the third positioning surface is complementary to the inclination angle of the fourth positioning surface. The optical lens unit of claim 1, wherein the second reference surface and the third reference surface are parallel to each other. The optical lens unit of claim 1 further comprising a light shielding ring formed of a material having opaque characteristics and disposed in the lens barrel and located between the first lens and the second lens. The optical lens unit of claim 1 further comprising a light shielding ring formed of a material having opaque characteristics and disposed in the lens barrel and located between the second lens and the third lens. The optical lens unit of claim 1, further comprising a fixing ring disposed in the lens barrel and closer to the image side hole than the third lens and contacting the surface of the side of the sixth mirror surface. The optical lens unit of claim 9, further comprising a fourth lens disposed in the lens barrel and adjacent to the image side hole and contacting the fixing ring.