CN105572846A - Novel micro optical lens - Google Patents

Abstract

The invention discloses a novel micro optical lens which comprises a lens cone (1), a first space ring (2), a first lens (3), a second space ring (4), a second lens (5), a third space ring (6) and an optical filter (7), wherein the first space ring (2), the first lens (3), the second space ring (4), the second lens (5), the third space ring (6) and the optical filter (7) are sequentially arranged in the lens cone (1), and the total length (TTL) of the optical lens is 1.56mm. The novel micro optical lens is simple in structure; parameters of each lens of the optical lens group are skillfully designed, and mounting positions of all lenses are reasonably combined and configured, so that the micro optical lens is small in total length and small in image formation and aberration, and has favorable application prospects due to relatively high resolution ratio and good optical performance.

Description

A kind of new micro optical lens

Technical field

The invention belongs to optical technical field, particularly relate to a kind of new micro optical lens.

Background technology

Minisize optical lens is the product of modern high technology, and its volume is little, powerful, good concealment.Along with improving constantly of people's personal consumption level, minisize optical lens has been widely used the industries such as aviation, business, medium, enterprises and institutions.The appearance of minisize optical lens, brings huge change to the life of people.

Along with the progress of society, increasing product is all towards miniaturization, ultrathin development, this just has higher requirement to the physical dimension of minisize optical lens, ensure while reducing the physical dimension of minisize optical lens, the resolution of minisize optical lens can not decline, need further raising on the contrary, to meet the various demands of user.

Summary of the invention

The object of this invention is to provide a kind of new micro optical lens, while reducing optical lens contour length, greatly improve the resolution of optical lens, and structure is simple, be convenient to produce.

The present invention adopts following technical scheme:

A kind of new micro optical lens, comprises lens barrel, the first spacer ring, the first lens, the second spacer ring, the second lens, the 3rd spacer ring and optical filter; Described first spacer ring, the first lens, the second spacer ring, the second lens, the 3rd spacer ring and optical filter are successively set in lens barrel, and the overall length TTL of optical lens is 1.56 millimeters.

As a further improvement on the present invention, the thing side surface S1 of described first lens and surface, image side S2 is non-spherical surface; The thing side surface S3 of described second lens and surface, image side S4 is non-spherical surface.

As a further improvement on the present invention, the thing side surface S1 of described first lens and the aspheric surface parameter of surface, image side S2 are shown with following formula table:

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

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 namely inverse of the thing side surface S1 of the first lens and the radius-of-curvature of surface, image side S2, 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 is as shown in table 1:

The aspheric surface parameter of table 1. first lens

。

As a further improvement on the present invention, the thing side surface S3 of described second lens and the aspheric surface parameter of surface, image side S4 are shown with following formula table:

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

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 namely inverse of the thing side surface S3 of the second lens and the radius-of-curvature of surface, image side S4, 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 is as shown in table 2:

The aspheric surface parameter of table 2. second lens

。

As a further improvement on the present invention, the optics bias of described first lens is 60 degree, and refractive index is 1.543402, and abbe number is 56.022618, lens thickness D1=0.363 ± 0.002 millimeter.

As a further improvement on the present invention, the optics bias of described second lens is 60 degree, and refractive index is 1.491756, and abbe number is 57.440791, lens thickness D2=0.352 ± 0.005 millimeter.

Beneficial effect of the present invention:

New micro optical lens structure of the present invention is simple, adopt 2 aspherical lens, design the parameters of each lens in minisize optical lens dexterously, the reasonably installation site of each lens of combination configuration, make the total length of optical lens little, and imaging and aberration little, thus there is higher resolution, good in optical property, has good application prospect.

Accompanying drawing explanation

Fig. 1 is the assembly structure schematic diagram of new micro optical lens 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 cross section structure schematic diagram of the first spacer ring of the present invention;

Fig. 7 is the planar structure schematic diagram of the first spacer ring of the present invention;

Fig. 8 is the cross section structure schematic diagram of the second spacer ring of the present invention;

Fig. 9 is the planar structure schematic diagram of the second spacer ring of the present invention;

Figure 10 is the cross section structure schematic diagram of the 3rd spacer ring of the present invention;

Figure 11 is the planar structure schematic diagram of the 3rd spacer ring of the present invention;

Figure 12 is the sectional structure schematic diagram of lens barrel of the present invention;

Figure 13 is the planar structure schematic diagram of lens barrel of the present invention.

In figure: 1-lens barrel, 2-first spacer ring, 3-first lens, 4-second spacer ring, 5-second lens, 6-the 3rd spacer ring, 7-optical filter, A-optical axis, the thing side surface of S1-first lens, the surface, image side of S2-first lens, the thing side surface of S3-second lens, the surface, image side of S4-second lens.

Embodiment

Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.

As shown in figures 1-13, a kind of new micro optical lens, comprises lens barrel 1, first spacer ring 2, first lens 3, second spacer ring 4, second lens 5, the 3rd spacer ring 6 and optical filter 7; Described first spacer ring 2, first lens 3, second spacer ring 4, second lens 5, the 3rd spacer ring 6 and optical filter 7 are successively set in lens barrel 1, and the overall length TTL of optical lens is 1.56 millimeters.

The thing side surface S1 of described first lens 3 and surface, image side S2 is non-spherical surface; The thing side surface S3 of described second lens 5 and surface, image side S4 is non-spherical surface.

The aspheric surface parameter of the thing side surface S1 of described first lens 3 and surface, image side S2 is shown with following formula table:

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

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 namely inverse of the thing side surface S1 of the first lens 3 and the radius-of-curvature of surface, image side S2, 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 3 is as shown in table 1:

The aspheric surface parameter of table 1. first lens

。

The aspheric surface parameter of the thing side surface S3 of described second lens 5 and surface, image side S4 is shown with following formula table:

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

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 namely inverse of the thing side surface S3 of the second lens 5 and the radius-of-curvature of surface, image side S4, 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 5 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	1.225039364	-0.283551356
Effective diameter millimeter	R3＝0.8163003	R4＝-3.526698
			K	0.1918902	-233.414
A 2	-0.51480401	0.18072194
			A 4	-0.76374542	-0.51081721
A 6	-1.4395457	-0.30124826
			A 8	-13.131331	-0.74464039
A 10	57.716654	0.17431254
			A 12	0	0
A 14	0	0
			A 16	0	0

。

The optics bias of described first lens 3 is 60 degree, and refractive index is 1.543402, and abbe number is 56.022618, lens thickness D1=0.363 ± 0.002 millimeter.

The optics bias of described second lens 5 is 60 degree, and refractive index is 1.491756, and abbe number is 57.440791, lens thickness D2=0.352 ± 0.005 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 new micro optical lens, is characterized in that: comprise lens barrel (1), the first spacer ring (2), the first lens (3), the second spacer ring (4), the second lens (5), the 3rd spacer ring (6) and optical filter (7); Described first spacer ring (2), the first lens (3), the second spacer ring (4), the second lens (5), the 3rd spacer ring (6) and optical filter (7) are successively set in lens barrel (1), and the overall length (TTL) of optical lens is 1.56 millimeters.

2. new micro optical lens according to claim 1, is characterized in that: thing side surface (S1) and surface, image side (S2) of described first lens (3) are non-spherical surface; Thing side surface (S3) and surface, image side (S4) of described second lens (5) are non-spherical surface.

3. new micro optical lens according to claim 2, is characterized in that: the thing side surface (S1) of described first lens (3) and the aspheric surface parameter on surface, image side (S2) are shown with following formula table:

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

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 namely inverse of the thing side surface (S1) of the first lens (3) and the radius-of-curvature on surface, image side (S2), 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 (3) 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) 8.602128339 1.658194949 Effective diameter (millimeter) R1＝0.1162503 R2＝0.6030654 K -1.222861 0.5461091 A ₂ -3.2909795 -0.06402806 A ₄ 18.252018 1.2742545 A ₆ -105.61424 -1.8200619 A ₈ 526.27534 134.68373 A ₁₀ -1138.3527 331.43337 A ₁₂ 0 0 A ₁₄ 0 0 A ₁₆ 0 0

。

4. new micro optical lens according to claim 2, is characterized in that: the thing side surface (S3) of described second lens (5) and the aspheric surface parameter on surface, image side (S4) are shown with following formula table:

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

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 namely inverse of the thing side surface (S3) of the second lens (5) and the radius-of-curvature on surface, image side (S4), 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 (5) 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) 1.225039364 -0.283551356 Effective diameter (millimeter) R3＝0.8163003 R4＝-3.526698 K 0.1918902 -233.414 A ₂ -0.51480401 0.18072194 A ₄ -0.76374542 -0.51081721 A ₆ -1.4395457 -0.30124826 A ₈ -13.131331 -0.74464039 A ₁₀ 57.716654 0.17431254 A ₁₂ 0 0 A ₁₄ 0 0 A ₁₆ 0 0

。

5. new micro optical lens according to claim 1, is characterized in that: the optics bias of described first lens (3) is 60 degree, and refractive index is 1.543402, and abbe number is 56.022618, lens thickness D1=0.363 ± 0.002 millimeter.

6. new micro optical lens according to claim 1, is characterized in that: the optics bias of described second lens (5) is 60 degree, and refractive index is 1.491756, and abbe number is 57.440791, lens thickness D2=0.352 ± 0.005 millimeter.