KR20170062795A - Array lens system - Google Patents

Array lens system Download PDF

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Publication number
KR20170062795A
KR20170062795A KR1020150168415A KR20150168415A KR20170062795A KR 20170062795 A KR20170062795 A KR 20170062795A KR 1020150168415 A KR1020150168415 A KR 1020150168415A KR 20150168415 A KR20150168415 A KR 20150168415A KR 20170062795 A KR20170062795 A KR 20170062795A
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South Korea
Prior art keywords
lens
planar
refractive index
object side
lens group
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KR1020150168415A
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Korean (ko)
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한-칭 린
한-이 궈
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하이맥스 테크놀로지스 리미티드
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Priority to KR1020150168415A priority Critical patent/KR20170062795A/en
Publication of KR20170062795A publication Critical patent/KR20170062795A/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/64—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having more than six components
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

In an array lens system including a plurality of array lenses, each array lens includes a first optical device having a first reflecting surface, a first lens group having a positive refractive index, a second lens group having a positive refractive index, A third lens group having a negative refractive index, a second optical device having a second reflecting surface, and a fourth lens group having a negative refractive index, arranged sequentially from the object side to the image side.

Description

[0001] ARRAY LENS SYSTEM [0002]

The present invention relates to an array lens system, and more particularly to an array lens system having a right angle prism.

Wafer level optical (WLO) technology uses wafer level semiconductor technology to fabricate micro-optics devices such as lens modules or camera modules. Wafer level optical technology can be applied to mobile or portable devices, and photography has become an essential function of these devices.

As the size of an image sensor (e.g., a charge coupled device (CCD) or a complementary metal oxide semiconductor image sensor (CIS)) is getting smaller, the size of the imaging lens to be coupled must also be smaller.

The design process of the imaging lens is very strict, which can meet the high resolution demands, while being small in volume, light in weight, and low in cost. Therefore, it is urgent to design a new imaging optical device, in particular, a high-quality and small wafer-level micro-optical device.

In view of this, one of the objects of the embodiments of the present invention is to provide a high-definition, compact, and lightweight array lens system.

According to an embodiment of the present invention, an array lens system includes a plurality of array lenses, each array lens comprising a first optical device having a first reflecting surface, a first lens group having a positive refractive index, A second lens group having a negative refractive index, a second lens group having a second reflecting surface, and a fourth lens group having a negative refractive index, wherein the fourth lens group is arranged sequentially from the object side toward the image side do.

1 (a) shows a lens arrangement of an array lens of an embodiment of the present invention.
Fig. 1 (b) is a plan view of an array lens system composed of a plurality of array lenses (Fig. 1 (a)).
Fig. 2 shows the lens path of the array lens of Fig. 1 (a).
3 shows a lens path of an array lens of another embodiment of the present invention.

Fig. 1 (a) shows a lens arrangement of an array lens 100 of an embodiment of the present invention.

1 (b) is a plan view of an array lens system 200 composed of a plurality (for example, four) of array lenses 100. The symbol (x) indicates incident light, Light. Fig. 2 is a lens path of the array lens 100 of Fig. 1 (a). The array lens 100 of this embodiment can be manufactured using wafer level optical technology. The material of the array lens 100 of this embodiment may be a transparent material such as glass or plastic. In the drawing, the left upper corner of the array lens 100 faces an object, and the upper right corner of the array lens 100 faces an image plane.

In the present embodiment, the array lens 100 includes a first optical device 21 (having a first reflecting surface 211), a first lens group 1 having a positive refractive power, A second lens group 2 having a refractive index, a third lens group 3 having a negative refractive index, a second optical device 22 having a second reflecting surface 222, And sequentially includes the fourth lens group 4 from the object side toward the image side.

In the embodiment shown in Fig. 1 (a), the first optical device 21 may comprise a reflector. In another embodiment, the first optical device 21 may comprise a prism. The first optical device 21 of this embodiment is adjustable to match the required angle of incident light. The second optical device 22 may include a prism. In another embodiment, the second optical device 22 may comprise a reflector.

The first lens group 1 having a positive refractive index is formed by successively arranging the convex surface first lens 11, diaphragm 23, planar second lens 12 and concave third lens 13 toward the image side from the object side . Specifically, the convex surface first lens 11 is provided with an object side surface s1 which is an aspherical convex surface and a planar image side surface s2. The planar second lens 12 is provided with a planar object side surface s2 and a plane image side surface s3. The concave surface third lens 12 is provided with a planar object side surface s3 and a concave image side surface s4. In the present embodiment, the convex surface first lens 11 is substantially in contact with the planar second lens 12, and the planar second transparent lens 12 is substantially in contact with the concave surface third lens 13. [

The second lens group 2 having positive refractive index sequentially includes the convex fourth lens 14, the fifth plane lens 15 and the concave sixth lens 16 from the object side toward the image side. Specifically, the convex surface fourth lens 14 is provided with an object side surface s5 which is a convex surface of an aspherical surface and a planar image side surface s6. The planar fifth lens 15 is provided with a planar object side surface s6 and a planar image side surface s7. The concave sixth lens 16 is provided with a planar object side surface s7 and an image side surface s8 which is a concave surface. In this embodiment, the convex surface fourth lens 14 is substantially in contact with the planar fifth lens 15, and the planar fifth lens 15 is substantially in contact with the concave sixth lens 16.

The third lens group 3 having a negative refractive index sequentially includes the concave surface seventh lens 17 and the planar eighth lens 18 from the object side toward the image side. Specifically, the concave surface seventh lens 17 is provided with an object side surface s9 which is a concave surface of an aspherical surface and a planar image side surface s10. The planar eighth lens 18 is provided with a planar object side surface s10 and a planar image side surface s11. In this embodiment, the concave surface seventh lens 17 substantially contacts the planar eighth lens 18.

Negative Refractive Index The fourth lens group 4 includes a concave surface ninth lens 19 and a planar tenth lens 20. Specifically, the concave surface ninth lens 19 is provided with an object side surface s12, which is an aspheric concave surface, and a planar image side surface s13. The planar tenth lens 20 is provided with a planar object side surface s13 and a planar image side surface s14. In this embodiment, the concave surface ninth lens 19 is substantially in contact with the tenth lens 20 of the plane.

As shown in Fig. 1 (a), incident light is incident on the first surface 221 of the second optical device 22, and is reflected by the second reflecting surface 222 to be incident on the second optical device 22 And is emitted from the third surface 223. In this embodiment, since the first surface 221 and the third surface 223 are at right angles, a right angle prism is formed.

In one embodiment, the array lens 100 is coated on at least one surface of the planar second lens 12, the planar fifth lens 15, the planar eighth lens 18, or the planar tenth lens 20, An infrared filter (not shown) may be further included.

According to one of the features of this embodiment, the refractive indexes of the convex surface first lens 11, the convex surface fourth lens 14 and the concave surface sixth lens 16 are between 1.512 and 1.52, and Abbe's number ) Is between 48.7 and 56.5. In another embodiment, the difference between the Abbe number V1 of the convex surface first lens 11 and the Abbe number V2 of the concave surface third lens 13 is between 17 and 25 (i.e., 17 <V1 -V2 < 25).

According to another feature of the present embodiment, the refractive indexes of the planar second lens 12, the fifth planar lens 15, the planar eighth lens 18, and the tenth planar lens 20 are between 1.5 and 1.6, The number is between 40 and 60. In another embodiment, the ratio of the focal length EF34 of the second lens group 2 having a positive refractive index to the focal length EF12 of the first lens group 1 having a positive refractive index is between 0.01 and 0.28 ( That is, 0.01 < EF34 / EF12 < 0.28).

3 shows the lens path of the array lens 300 of another embodiment of the present invention.

In this embodiment, the fourth lens group 4 having a negative refractive index includes the planar eleventh lens 31, the concave 12th lens 32 and the planar 13th lens 33 sequentially from the object side toward the image side do. Specifically, the planar eleventh lens 31 is provided with a planar object side surface s15 and a planar image side surface s16. The concave surface twelfth lens 32 is provided with a planar object side surface s16 and an image side surface s17 which is a concave surface of an aspheric surface. The planar thirteenth lens 23 is provided with a planar object side surface s18 and a planar image side surface s19. In this embodiment, the planar eleventh lens 31 substantially contacts the concave twelfth lens 32. [

The refractive index and the Abbe number in the present embodiment are similar to the previous embodiment. Further, the refractive indexes of the planar eleventh lens 31 and the planar thirteenth lens 33 are between 1.5 and 1.6, and the Abbe number is between 40 and 60.

The aspherical surface (for example, s1, s4, s5, s8, s9, s12 or s17) can be defined by the following equation:

Figure pat00001

Where z is the distance from the lens apex in the optical axis direction, r is the distance perpendicular to the optical axis direction, c is the inverse of the radius of curvature of the lens apex, k is a second order conic constant, To? 8 are aspherical surfaces It is an aspheric coefficient. Note that, in the case of each array lens 100 of the array lens system 200 (Fig. 1 (b)), the parameters of the above equations may be the same or different from each other.

The preferred embodiments of the present invention have been described above, but the present invention is not limited thereto. All other equivalent changes or modifications that are completed without departing from the spirit of the invention should be included in the following claims.

100: Array lens
200: Array lens system
300: Array lens
1: a first lens group having a positive refractive index
2: a second lens group having a positive refractive index
3: Third lens group having a negative refractive index
4: Fourth lens group having a negative refractive index
11: convex surface first lens
12: plane second lens
13: concave third lens
14: convex fourth lens
15: plane fifth lens
16: concave surface sixth lens
17: concave surface seventh lens
18: plane eighth lens
19: concave surface No. 9 lens
20: plane 10 lens
21: First optical device
211: first reflecting surface
22: Second optical device
222: second reflecting surface
223: Third surface
23: Aperture
31: plane eleventh lens
32: Concave 12th lens
33: plane 13 lens
s1: object side surface which is a convex surface of an aspherical surface
s2: plane image side surface / plane object side surface
s3: plane image side surface / plane object side surface
s4: Surface of concave side of image
s5: object side surface which is convex surface of aspheric surface
s6: plane image side surface / plane object side surface
s7: plane image side surface / plane object side surface
s8: concave surface of image side
s9: an object side surface which is a concave surface of an aspherical surface
s10: plane image side surface / plane object side surface
s11: Planar image side surface
s12: an object side surface which is a concave surface of an aspherical surface
s13: plane image side surface / plane object side surface
s14: Planar image side surface
s15: Planar object side surface
s16: Planar image side Planar / Planar object side surface
s17: image side surface which is concave surface of aspherical surface
s18: Planar object side surface
s19: Planar image side surface

Claims (15)

In an array lens system including a plurality of array lenses,
Each of said array lenses comprising:
A first optical device having a first reflecting surface;
A first lens group having a positive refractive index;
A second lens group having positive refractive index;
A third lens group having a negative refractive index;
A second optical device having a second mirror surface; And
A fourth lens group having negative refractive index;
/ RTI &gt;
The first lens unit having the positive refractive index, the second lens unit having the positive refractive index, the third lens unit having the negative refractive index, the second optical unit, and the negative refractive index The fourth lens group having the fourth lens group is arranged sequentially from the object side toward the image,
Array lens system. The method according to claim 1,
Wherein the second optical device comprises a right angle prism. The method according to claim 1,
Wherein the first lens group having positive refractive index sequentially includes a convex surface first lens, a diaphragm, a planar second lens, and a concave third lens in order from the object side toward the image side. The method of claim 3,
Wherein the second lens group having positive refractive index sequentially includes a convex fourth lens, a fifth plane lens, and a concave sixth lens from the object side toward the image side. 5. The method of claim 4,
Wherein the third lens group having the negative refractive index sequentially includes the concave surface seventh lens and the plano-eighth lens from the object side toward the image side. 6. The method of claim 5,
And the fourth lens group having the negative refractive index sequentially includes the concave surface ninth lens and the planar tenth lens from the object side toward the image side. 6. The method of claim 5,
Wherein the refractive indexes of said convex surface first lens, said convex surface fourth lens, and said concave surface sixth lens are between 1.512 and 1.52. 6. The method of claim 5,
Wherein the Abbe's number of the convex surface first lens, the convex surface fourth lens, and the concave surface sixth lens is between 48.7 and 56.5. 6. The method of claim 5,
Wherein the difference between the Abbe number of the convex surface first lens and the Abbe number of the concave surface third lens is between 17 and 25. The method according to claim 6,
Wherein the refractive indexes of the planar second lens, the planar fifth lens, the planar eighth lens and the planar tenth lens are between 1.5 and 1.6. The method according to claim 6,
Wherein the Abbe numbers of the planar second lens, the planar fifth lens, the planar eighth lens, and the planar tenth lens are between 40 and 60. The method according to claim 1,
Wherein the ratio of the focal length of the second lens group having the positive refractive index to the focal length of the first lens group having the positive refractive index is between 0.01 and 0.28. 6. The method of claim 5,
And the fourth lens group having negative refractive index sequentially includes a planar eleventh lens, a concave surface twelfth lens, and a planar thirteenth lens from the object side toward the image side. 14. The method of claim 13,
Wherein the refractive indexes of the planar second lens, the planar fifth lens, the planar eighth lens, the planar eleventh lens, and the planar thirteenth lens are between 1.5 and 1.6. 14. The method of claim 13,
Wherein the Abbe number of the planar second lens, the planar fifth lens, the planar eighth lens, the planar eleventh lens, and the planar thirteenth lens is between 40 and 60.
KR1020150168415A 2015-11-30 2015-11-30 Array lens system KR20170062795A (en)

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