CN104932085A - Miniature lens group - Google Patents

Abstract

A miniature lens group is characterized by comprising a lens cone (1), a first lens (2), a first space ring (3), a second lens (4), a second space ring (5), and a color filter (6). The first lens (2), the first space ring (3), the second lens (4), the second space ring (5) and the color filter (6) are sequentially arranged in the lens cone (1). The total length (TTL) of the lens is 2.43 mm. The miniature lens group adopts two aspheric lenses. The miniature lens group provided by the invention has the advantages of miniaturization and high optical performance, and can be easily installed in various digital devices having high requirement on the camera dimensions.

Description

Micromirror head group

Technical field

The present invention relates to optical technical field, especially a kind of micromirror head group.

Background technology

Along with the requirement of the portability of optical lens is more and more higher, digital image field is constantly brought forth new ideas, changes, is developed, and at mobile phone, in succession, notebook computer all at lightening, miniaturization, therefore it is also proposed miniaturization to camera, high-resolution requirement.

Summary of the invention

The object of the present invention is to provide a kind of micromirror head group, meet miniaturization and high performance requirement.

Technical scheme of the present invention is:

A kind of micromirror head group, comprise lens barrel 1, first lens 2, first spacer ring 3, second lens 4, second spacer ring 5 and color filter 6, described first lens 2, first spacer ring 3, second lens 4, second spacer ring 5 and color filter 6 are successively set in lens barrel 1, and the overall length TTL of camera lens is 2.43 millimeters.

The thing side surface S1 of the first lens of described first lens 2 is non-spherical surface, surface, the image side S2 of the first lens of the first lens 2 is non-spherical surface, the thing side surface S3 of the second lens of the second lens 4 is non-spherical surface, and surface, the image side S4 of the second lens of the second lens 4 is non-spherical surface.

The aspheric surface parameter of the thing side surface S1 of described first lens and surface, the image side S2 of the first lens is shown with following formula table:

$Z=\frac{{\mathrm{Cy}}^2}{1+\sqrt{1-(1+k)C^2{y}^2}}+A_2{y}^2+A_4{y}^4+A_6{y}^6+A_8{y}^8+A_{10}{y}^{10}+A_{12}{y}^{12}+A_{14}{y}^{14}+A_{16}{y}^{16}$

; Wherein Z is in the side-play amount of position using surface vertices as reference optical axis highly for Y along optical axis A direction, C is the inverse of the radius of osculating sphere, namely close to the radius-of-curvature at optical axis A place, the i.e. inverse of the radius-of-curvature of the thing side surface S1 of the first lens, surface, the image side S2 of the first lens, k represents quadric surface coefficient, and y is aspheric surface height, namely from lens center toward the height of rims of the lens, also be the horizontal range apart from aspheric surface axis of symmetry, A ₂, A ₄, A ₆, A ₈, A ₁₀, A ₁₂, A ₁₄, A ₁₆for asphericity coefficient; The aspheric surface parameter of the first lens 2 is as shown in table 1:

The aspheric surface parameter of table 1. first lens

Aspheric surface parameter	S1 face	S2 face
			Radius-of-curvature (millimeter)	0.6006514	1.22681
Effective diameter (millimeter)	R1＝0.94	R2＝0.82
			k	0.4834969	0
A 2	0	0
			A 4	-0.18144736	0.010669234
A 6	-14.718938	-0.34705758
			A 8	105.78868	0.43278607
A 10	-373.70021	-0.2652522
			A 12	0	0
A 14	0	0
			A 16	0	0

。

The aspheric surface parameter of the thing side surface S3 of described second lens and surface, the image side S4 of the second lens is shown with following formula table:

$Z=\frac{{\mathrm{Cy}}^2}{1+\sqrt{1-(1+k)C^2{y}^2}}+A_2{y}^2+A_4{y}^4+A_6{y}^6+A_8{y}^8+A_{10}{y}^{10}+A_{12}{y}^{12}+A_{14}{y}^{14}+A_{16}{y}^{16}$

; Wherein Z is in the side-play amount of position using surface vertices as reference optical axis highly for Y along optical axis A direction, C is the inverse of the radius of osculating sphere, namely close to the radius-of-curvature at optical axis A place, the i.e. inverse of the radius-of-curvature of the thing side surface S3 of the second lens, surface, the image side S4 of the second lens, k represents quadric surface coefficient, and y is aspheric surface height, namely from lens center toward the height of rims of the lens, also be the horizontal range apart from aspheric surface axis of symmetry, A ₂, A ₄, A ₆, A ₈, A ₁₀, A ₁₂, A ₁₄, A ₁₆for asphericity coefficient; The aspheric surface parameter of the second lens 4 is as shown in table 2:

The aspheric surface parameter of table 2. second lens

Aspheric surface parameter	S3 face	S4 face
			Radius-of-curvature (millimeter)	-1.397064	-2.408003
Effective diameter (millimeter)	R3＝0.95	R4＝2.02
			k	0	4.224293
A 2	0	0
			A 4	-0.18144736	0.010669234
A 6	-14.718938	-0.34705758
			A 8	105.78868	0.43278607
A 10	-373.70021	-0.2652522
			A 12	0	0
A 14	0	0
			A 16	0	0

。

The optics bias of described first lens 2 is 60 degree, focal distance f=1.96, and refractive index is 1.49176 ± 0.0005, and abbe number is 57.44 ± 0.8%, lens thickness D1=0.95 ± 0.02 millimeter.

The optics bias of described second lens 4 is 60 degree, focal distance f=-9.80, and refractive index is 1.49176 ± 0.0005, and abbe number is 57.44 ± 0.8%, lens thickness D2=0.42 ± 0.02 millimeter.

The invention has the beneficial effects as follows:

Micromirror head group of the present invention adopts 2 aspherical lens, and micro-lens provided by the invention has miniaturization, the advantage of high optical property, is convenient to be arranged in the various digital equipment high to camera dimensional requirement.

Accompanying drawing explanation

Fig. 1 is the assembly structure schematic diagram of micromirror head group of the present invention.

Fig. 2 is the cross section structure schematic diagram of the first lens of the present invention.

Fig. 3 is the planar structure schematic diagram of the first lens of the present invention.

Fig. 4 is the cross section structure schematic diagram of the second lens of the present invention.

Fig. 5 is the planar structure schematic diagram of the second lens of the present invention.

Fig. 6 is the structural representation of the first spacer ring of the present invention.

Fig. 7 is the structural representation of the second spacer ring of the present invention.

Fig. 8 is the sectional structure schematic diagram of lens barrel of the present invention.

Fig. 9 is the left TV structure schematic diagram of lens barrel of the present invention.

Figure 10 is the right TV structure schematic diagram of lens barrel of the present invention.

In figure: the thing side surface that the surface, image side that 1 be lens barrel, 2 be the first lens, 3 be the first spacer ring, 4 is the second lens, 5 is the second spacer ring, 6 is color filter, S1 is the first lens thing side surface, S2 is the first lens, S3 are the second lens, S4 are the surface, image side of the second lens, A is optical axis.

Embodiment

Below in conjunction with accompanying drawing, the invention will be further described:

As Fig. 1 to 10, a kind of micromirror head group, comprise lens barrel 1, first lens 2, first spacer ring 3, second lens 4, second spacer ring 5 and color filter 6, described first lens 2, first spacer ring 3, second lens 4, second spacer ring 5 and color filter 6 are successively set in lens barrel 1, and the overall length TTL of camera lens is 2.43 millimeters.

The thing side surface S1 of the first lens of the first lens 2 is non-spherical surface, surface, the image side S2 of the first lens of the first lens 2 is non-spherical surface, the thing side surface S3 of the second lens of the second lens 4 is non-spherical surface, and surface, the image side S4 of the second lens of the second lens 4 is non-spherical surface.

The aspheric surface parameter of the thing side surface S1 of the first lens and surface, the image side S2 of the first lens is shown with following formula table:

$Z=\frac{{\mathrm{Cy}}^2}{1+\sqrt{1-(1+k)C^2{y}^2}}+A_2{y}^2+A_4{y}^4+A_6{y}^6+A_8{y}^8+A_{10}{y}^{10}+A_{12}{y}^{12}+A_{14}{y}^{14}+A_{16}{y}^{16}$

; Wherein Z is in the side-play amount of position using surface vertices as reference optical axis highly for Y along optical axis A direction, C is the inverse of the radius of osculating sphere, namely close to the radius-of-curvature at optical axis A place, the i.e. inverse of the radius-of-curvature of the thing side surface S1 of the first lens, surface, the image side S2 of the first lens, k represents quadric surface coefficient, and y is aspheric surface height, namely from lens center toward the height of rims of the lens, also be the horizontal range apart from aspheric surface axis of symmetry, A ₂, A ₄, A ₆, A ₈, A ₁₀, A ₁₂, A ₁₄, A ₁₆for asphericity coefficient; The aspheric surface parameter of the first lens 2 is as shown in table 1:

The aspheric surface parameter of table 1. first lens

Aspheric surface parameter	S1 face	S2 face
			Radius-of-curvature (millimeter)	0.6006514	1.22681

[0042]

Effective diameter (millimeter)	R1＝0.94	R2＝0.82
			k	0.4834969	0
A 2	0	0
			A 4	-0.18144736	0.010669234
A 6	-14.718938	-0.34705758
			A 8	105.78868	0.43278607
A 10	-373.70021	-0.2652522
			A 12	0	0
A 14	0	0
			A 16	0	0

。

The aspheric surface parameter of the thing side surface S3 of the second lens and surface, the image side S4 of the second lens is shown with following formula table:

$Z=\frac{{\mathrm{Cy}}^2}{1+\sqrt{1-(1+k)C^2{y}^2}}+A_2{y}^2+A_4{y}^4+A_6{y}^6+A_8{y}^8+A_{10}{y}^{10}+A_{12}{y}^{12}+A_{14}{y}^{14}+A_{16}{y}^{16}$

; Wherein Z is in the side-play amount of position using surface vertices as reference optical axis highly for Y along optical axis A direction, C is the inverse of the radius of osculating sphere, namely close to the radius-of-curvature at optical axis A place, the i.e. inverse of the radius-of-curvature of the thing side surface S3 of the second lens, surface, the image side S4 of the second lens, k represents quadric surface coefficient, and y is aspheric surface height, namely from lens center toward the height of rims of the lens, also be the horizontal range apart from aspheric surface axis of symmetry, A ₂, A ₄, A ₆, A ₈, A ₁₀, A ₁₂, A ₁₄, A ₁₆for asphericity coefficient; The aspheric surface parameter of the second lens 4 is as shown in table 2:

The aspheric surface parameter of table 2. second lens

Aspheric surface parameter	S3 face	S4 face
			Radius-of-curvature (millimeter)	-1.397064	-2.408003
Effective diameter (millimeter)	R3＝0.95	R4＝2.02
			k	0	4.224293
A 2	0	0
			A 4	-0.18144736	0.010669234
A 6	-14.718938	-0.34705758
			A 8	105.78868	0.43278607
A 10	-373.70021	-0.2652522
			A 12	0	0
A 14	0	0
			A 16	0	0

。

The optics bias of the first lens 2 is 60 degree, focal distance f=1.96, and refractive index is 1.49176 ± 0.0005, and abbe number is 57.44 ± 0.8%, lens thickness D1=0.95 ± 0.02 millimeter.

The optics bias of the second lens 4 is 60 degree, focal distance f=-9.80, and refractive index is 1.49176 ± 0.0005, and abbe number is 57.44 ± 0.8%, lens thickness D2=0.42 ± 0.02 millimeter.

Embodiment recited above is only be described the preferred embodiment of the present invention; not the spirit and scope of the present invention are limited; do not departing under design concept prerequisite of the present invention; the various modification that in this area, common engineering technical personnel make technical scheme of the present invention and improvement; all should fall into protection scope of the present invention, the technology contents of request protection of the present invention is all recorded in detail in the claims.

Claims (6)

1. a micromirror head group, it is characterized in that comprising lens barrel (1), the first lens (2), the first spacer ring (3), the second lens (4), the second spacer ring (5) and color filter (6), described first lens (2), the first spacer ring (3), the second lens (4), the second spacer ring (5) and color filter (6) are successively set in lens barrel (1), and the overall length (TTL) of camera lens is 2.43 millimeters.

2. micromirror head group according to claim 1, the thing side surface (S1) that it is characterized in that the first lens of described first lens (2) is non-spherical surface, the surface, image side (S2) of the first lens of the first lens (2) is non-spherical surface, the thing side surface (S3) of the second lens of the second lens (4) is non-spherical surface, and the surface, image side (S4) of the second lens of the second lens (4) is non-spherical surface.

3. micromirror head group according to claim 2, is characterized in that the aspheric surface parameter on the thing side surface (S1) of described first lens and the surface, image side (S2) of the first lens is shown with following formula table: $Z=\frac{{\mathrm{Cy}}^2}{1+\sqrt{1-(1+k)C^2{y}^2}}+A_2{y}^2+A_4{y}^4+A_6{y}^6+A_8{y}^8+A_{10}{y}^{10}+A_{12}{y}^{12}+A_{14}{y}^{14}+A_{16}{y}^{16}$ ; Wherein Z is in the side-play amount of position using surface vertices as reference optical axis highly for y along optical axis (A) direction, C is the inverse of the radius of osculating sphere, namely close to the radius-of-curvature at optical axis (A) place, the i.e. inverse of the radius-of-curvature on the thing side surface (S1) of the first lens, the surface, image side (S2) of the first lens, k represents quadric surface coefficient, y is aspheric surface height, namely from lens center toward the height of rims of the lens, also be the horizontal range apart from aspheric surface axis of symmetry, A ₂, A ₄, A ₆, A ₈, A ₁₀, A ₁₂, A ₁₄, A ₁₆for asphericity coefficient; The aspheric surface parameter of the first lens (2) is as shown in table 1:

The aspheric surface parameter of table 1. first lens

Aspheric surface parameter S1 face S2 face

Radius-of-curvature (millimeter) 0.6006514 1.22681 Effective diameter (millimeter) R1＝0.94 R2＝0.82 k 0.4834969 0 A ₂ 0 0 A ₄ -0.18144736 0.010669234 A ₆ -14.718938 -0.34705758 A ₈ 105.78868 0.43278607 A ₁₀ -373.70021 -0.2652522 A ₁₂ 0 0 A ₁₄ 0 0 A ₁₆ 0 0

4. micromirror head group according to claim 2, is characterized in that the aspheric surface parameter on the thing side surface (S3) of described second lens and the surface, image side (S4) of the second lens is shown with following formula table: $Z=\frac{{\mathrm{Cy}}^2}{1+\sqrt{1-(1+k)C^2{y}^2}}+A_2{y}^2+A_4{y}^4+A_6{y}^6+A_8{y}^8+A_{10}{y}^{10}+A_{12}{y}^{12}+A_{14}{y}^{14}+A_{16}{y}^{16}$ ; Wherein Z is in the side-play amount of position using surface vertices as reference optical axis highly for Y along optical axis (A) direction, C is the inverse of the radius of osculating sphere, namely close to the radius-of-curvature at optical axis (A) place, the i.e. inverse of the radius-of-curvature on the thing side surface (S3) of the second lens, the surface, image side (S4) of the second lens, k represents quadric surface coefficient, y is aspheric surface height, namely from lens center toward the height of rims of the lens, also be the horizontal range apart from aspheric surface axis of symmetry, A ₂, A ₄, A ₆, A ₈, A ₁₀, A ₁₂, A ₁₄, A ₁₆for asphericity coefficient; The aspheric surface parameter of the second lens (4) is as shown in table 2:

The aspheric surface parameter of table 2. second lens

Aspheric surface parameter S3 face S4 face Radius-of-curvature (millimeter) -1.397064 -2.408003 Effective diameter (millimeter) R3＝0.95 R4＝2.02 k 0 4.224293 A ₂ 0 0 A ₄ -0.18144736 0.010669234 A ₆ -14.718938 -0.34705758 A ₈ 105.78868 0.43278607 A ₁₀ -373.70021 -0.2652522 A ₁₂ 0 0 A ₁₄ 0 0 A ₁₆ 0 0

5. micromirror head group according to claim 1, the optics bias that it is characterized in that described first lens (2) is 60 degree, focal distance f=1.96, and refractive index is 1.49176 ± 0.0005, abbe number is 57.44 ± 0.8%, lens thickness D1=0.95 ± 0.02 millimeter.

6. micromirror head group according to claim 1, the optics bias that it is characterized in that described second lens (4) is 60 degree, focal distance f=-9.80, and refractive index is 1.49176 ± 0.0005, abbe number is 57.44 ± 0.8%, lens thickness D2=0.42 ± 0.02 millimeter.