CN100443943C - Square individual optical image capture glass lens and manufacture method - Google Patents

Abstract

This invention relates to one long rectangle optical image taking lens and its process method, which comprises single lens slice composed of one rectangle outside part and one central lens part, wherein, the outside part is set inside clamper one; the central lens part comprises one convex and concave non-sphere surface; the process is to use film slice element and cutting for several rectangle film units; then putting the units into lens shaping mode processed by high temperature grinding.

Description

The manufacture method of square individual optical image capture glass lens

Technical field

The present invention relates to a kind of manufacture method of square individual optical image capture glass lens, especially at mobile phone camera, and use the camera of CCD (charge-coupled device (CCD)) or CMOS sensing components such as (complementary metal oxides), constitute and comprise one protruding one recessed two aspheric high-performance, optical lens cheaply by the monomer-type glass mirror and provide a kind of.

Background technology

Progress along with science and technology, electronic product constantly develops towards compact and multi-functional direction, and in the electronic product, the demand that adds image-taking device is all arranged as digital camera (Digital Still Camera), computer cameras (PC camera), network cameras (Network camera), mobile phone or personal digital assistance devices such as (PDA); And for easy to carry and meet the demand of hommization, image-taking device not only needs to have good image quality, also needs smaller volume and lower cost of manufacture simultaneously, and the beginning can effectively promote the application of this image-taking device.

And because the material selectivity of traditional sphere abrading glass eyeglass is more, and aberration is comparatively favourable for revising, widely industry is used, but when sphere abrading glass eyeglass was applied in less and visual angle (Wide-angle) the bigger situation of numerical aperture (F Number), the correction of aberrations such as spherical aberration and astigmatism is difficulty still; And in order to improve the shortcoming of above-mentioned traditional sphere abrading glass eyeglass, present image-taking device is existing to be used the aspheric surface glass lens or uses the aspheric surface modeling glass lens, to obtain preferable image quality, as: U.S.'s patent of invention the 6th, 031, No. 670 " WIDE-ANGLE LENS ", or TOHKEMY 2001-183578 number (P2001-183578A) " capture camera lens (LENS) ", or TaiWan, China patent announcement number 573740 " optical shooting lens " etc., the structure of right above-mentioned optical shooting lens, its lens length is still excessive, form by two eyeglasses as TOHKEMY P2001-183578A " capture camera lens ", promptly general common name " 1g-1p " camera lens (forming) or " 2-g " by a glass glass and a plastics plastic eyeglass, " 2-p " camera lens (forming) by two glass glass eyeglasses or two plastics plastic eyeglasses, and wherein second on first of first eyeglass to second eyeglass apart from d more than or equal to 0.9f (d 〉=0.9f, f is the focal length of lens set integral body), make sampling image lens can't have smaller size smaller or lower cost; Again, a known aspheric lens is all established the convexo-convex aspherical mirror of tool, and its processing procedure comprises the following step at least: utilize the first material of a block moulded glass, tailor into several block units again, again each block unit is carried out surface grinding and polishing processing with the semi-manufacture that form a tool biconvex sphere or the semi-manufacture of spheroid, again these semi-manufacture are placed lens forming die, directly high-temperature high-pressure is molded as again; Wherein, processing steps is quite consuming time takes a lot of work for surface grinding and polishing, and cost of manufacture improves relatively, and can't become more meticulous, and therefore not only can't satisfy electronic product makes every effort to compact demand, has also relatively limited the application of sampling image lens.

Summary of the invention

The object of the present invention is to provide a kind of method for making of square individual optical image capture glass lens, it comprises the following step:

The one flake glass unit material with uniform thickness is provided;

Utilize the first material of above-mentioned flake glass, be cut into several square sheet units, and make each square sheet unit have the uniform thickness of glass unit material;

One lens forming die is provided, and the central part of the upper and lower mould of this mould is provided with a recessed non-ball die face and protruding non-ball die face two corresponding aspheric surface die faces respectively, and the ring periphery in recessed non-ball die face or protruding non-ball die face is provided with a die cavity again;

This square sheet unit is positioned over center in the mould of mould, to carry out the operation of high temperature pressing mold, make the recessed non-ball die face of centre mat mould of square sheet unit and protruding non-ball die face and suppress a convex aspheric surface and a recessed aspheric surface, use the convex aspheric surface and the recessed aspheric surface of the central minute surface portion that constitutes camera lens, and extruded simultaneously and prolonged to extending out in die cavity in the outer shroud edge that makes square sheet unit, uses the rectangular periphery portion that constitutes camera lens;

The camera lens that takes out mould model in the shaping mould tool is finished product.

Can simplify processing procedure like this and reduce cost of manufacture.

Description of drawings

Fig. 1 is the optical texture schematic perspective view of one embodiment of the invention.

Fig. 2 (A), Fig. 2 (B) are side-looking and the front elevational schematic of Fig. 1.

Fig. 3 is the present invention's one user mode optical texture schematic side view.

Fig. 4 is the light path synoptic diagram of Fig. 3.

Fig. 5 (A), Fig. 5 (B) are the reference dimension figure of the preferred embodiment of Fig. 2 (A), Fig. 2 (B).

Fig. 6 is the reference dimension figure of the preferred embodiment of Fig. 3.

Fig. 7 is a processing procedure block schematic diagram of the present invention.

Fig. 8 is the rough schematic of processing procedure shown in Figure 7.

Drawing reference numeral explanation: camera lens 1; Rectangular periphery portion 10; Minute surface portion 20 of central authorities; Convex aspheric surface 21; Recessed aspheric surface 22; Lens barrel 3; Folder is established portion 31; Aperture 32; Sensing component 4; Protective glass 41; Sensing face 42; Glass unit material 5; Square sheet unit 6; Centre 61; Outer shroud position 62; The length of side 63; Four jiao 64; Mould 7; Recessed non-ball die face 71; Protruding non-ball die face 72; Die cavity 73; Anchor ring 74.

Embodiment

For making the present invention clear and definite more full and accurate, lift a preferred embodiment now and cooperate following accompanying drawing, structure of the present invention and technical characterictic thereof are described in detail as the back:

Please refer to Fig. 1, Fig. 2 (A), Fig. 2 (B), shown in Figure 3, it is respectively optical texture one synoptic diagram, side-looking and front elevational schematic, and the optical texture synoptic diagram of a user mode of one embodiment of the invention, square individual optical image capture camera lens 1 of the present invention is a monomer-type glass mirror, comprise a rectangular periphery portion 10 and a central minute surface portion 20, wherein, this rectangular periphery portion 10 cooperates the folder of a lens barrel (lensholder) 3 to establish portion's 31 sizes, and camera lens 1 can be embedded in lens barrel 3; This minute surface portion of central authorities 20 comprises a convex aspheric surface 21 and recessed aspheric surface 22 2 aspherics minute surfaces, and wherein this convex aspheric surface 21 is towards the imaging side, and this recessed aspheric surface 22 is towards object side.During use as shown in Figure 4; light is entered by the aperture 32 of lens barrel 3 front end faces; earlier enter camera lens 1 through recessed aspheric surface 22; leave camera lens 1 by convex aspheric surface 21 again; again through a protective glass 41, and image on the sensing face 42 of CMOS (complementary metal oxide semiconductor (CMOS)) sensing component 4 or CCD (charge-coupled device (CCD)).

Because the modern science and technology product is for compact requirement, demand directions such as optical shooting lens also is required towards high-quality, low cost of manufacture, length is short, volume is little, in light weight develop, optical shooting lens 1 of the present invention is then special because of processing procedure, make the structure of camera lens 1 of moulding also special relatively, so can meet above-mentioned demand; Please refer to Fig. 5 (A), Fig. 5 (B), shown in Figure 6, it is respectively the dimension reference figure of a preferred embodiment of the present invention and user mode thereof, wherein, focal length of the present invention can be reached 1.87mm or following, and total length, promptly the distance from the aperture 32 of lens barrel 3 front end faces to sensing face 42 can reach 2.87mm or following, and sensing face 42 Diagonal Dimension of the CMOS sensing component 4 that adopts can be 1/7 " (inch) or below.The convex aspheric surface 21 of the central minute surface portion 20 of relevant again a preferred embodiment of the present invention and the minute surface parameter of recessed aspheric surface 22, the bar row are as follows now:

Recessed aspheric surface 22
		R＝-1.131684	K＝2.199666 A4＝2.4218476 A6＝-51.453692 A8＝327.77628 A10＝-990.56954 A12＝0 A14＝0
Convex aspheric surface 21
		R＝-0.5835097	K＝-14.1246 A4＝-5.1269103 A6＝32.985477 A8＝-193.86029 A10＝574.86653 A12＝-763.00562 A14＝0

The aspheric surface formula

$X=1+\frac{{\mathrm{CY}}^2}{1-\sqrt{(K+1)C^2{Y}^2}}+A_2{Y}^2+A_4{\mathrm{<figure-callout\; id="4"\; label="Y"\; filenames="C20061000308700111.png,C20061000308700141.png"\; state="\{\{state\}\}">Y</figure-callout>}}^4+A_6{\mathrm{<figure-callout\; id="6"\; label="Y"\; filenames="C20061000308700151.png"\; state="\{\{state\}\}">Y</figure-callout>}}^6+A_8{Y}^8$

$+A_{10}{Y}^{10}+A_{12}{Y}^{12}+A_{14}{Y}^{14}+A_{16}{Y}^{16}$

Wherein, C=1/R; And that each parameter defines is as follows:

C: being the curvature of directions X, promptly is the inverse of radius of curvature R;

K: be Conic constant;

A ₂-A _n: be respectively X 2,4,6,8,10,12 ... the asphericity coefficient of n power.

Refer again to Fig. 7, shown in Figure 8, it is respectively the processing procedure calcspar and the synoptic diagram of square individual optical image capture camera lens 1 of the present invention, and processing procedure of the present invention comprises the following step:

Step (1): the flake glass unit material 5 that a tool uniform thickness is provided;

Step (2): utilize the first material 5 of above-mentioned flake glass, be cut into several square sheet units 6, and each square sheet unit 6 has the uniform thickness of glass unit material 5;

Step (3) a: lens forming die 7 is provided, the central part of the upper and lower mould of this mould is established tool one recessed non-ball die face 71 and protruding non-ball die face 72 2 corresponding aspheric surface die faces respectively, establishes tool one die cavity 73 at the ring periphery of recessed non-ball die face 71 or protruding non-ball die face 72 again;

Step (4): the interior center of mould that this square sheet unit 6 is positioned over mould 7, to carry out the operation of high temperature pressing mold, make the recessed non-ball die face 71 of centre 61 mat moulds 7 of square sheet unit 6 and protruding non-ball die face 72 and suppress a convex aspheric surface and a recessed aspheric surface, use the convex aspheric surface 21 and the recessed aspheric surface 22 that constitute the central minute surface of camera lens 1 portion 20, and extruded simultaneously and prolonged to extending out in die cavity in the outer shroud edge 62 that makes square sheet unit 6, uses the rectangular periphery portion 10 that constitutes camera lens 1;

Step (5): in shaping mould tool 7, take out the camera lens 1 of mould model, promptly finish the processing procedure of camera lens 1.

Wherein, in step (1), this glass unit material 5 is area sheets of glass bodies than big and uniform thickness, use to replace the first material of the block glass of commonly using, and with a preferred embodiment of the present invention, its thickness can be 0.40mm;

In step (2), this square sheet unit 6 is small size glass flakes that have glass unit's material 5 original uniform thickness and have the suitable length of side, and the mould that can directly be positioned over mould 7 is interior to carry out the operation of high temperature pressing mold, so can replace the known block unit that tailors by the first material of block glass, and can avoid known block unit need surface grinding and the polishing job sequence, therefore compare with conventional process, the present invention saves grinding of taking a lot of work consuming time and polishing job sequence at least, effectively reduces cost of manufacture; And with a preferred embodiment of the present invention, this square sheet unit 6 has the uniform thickness identical with glass unit material 5, and its length of side 63 can be 1.70mm, the length of side 11 than the rectangular periphery portion 10 of the camera lens after molded and shaped 1 is smaller, extruded in mould 7 back and to extending out the distance of prolonging of square sheet unit 6 when the gap of the two is the operation of high temperature pressing mold.

In step (3), the central part of the upper and lower mould of this mould 7 is established tool one recessed non-ball die face 71 and protruding non-ball die face 72 2 corresponding aspheric surface die faces respectively, with corresponding convex aspheric surface 21 and the recessed aspheric surface 22 that suppresses the central minute surface portion 20 of camera lens 1 respectively; Establish tool one die cavity 73 at the ring periphery of recessed non-ball die face 71 or protruding non-ball die face 72 again, rectangular periphery portion 10 with corresponding camera lens 1, and with a preferred embodiment of the present invention, this die cavity 73 can be designed to the circular die cavity of diameter 2.5mm, its total depth can be 0.319mm, with the thickness of the rectangular periphery portion 10 of corresponding camera lens 1.

In step (4), in the operation of high temperature pressing mold, the centre 61 of square sheet unit 6 promptly suppresses the convex aspheric surface 21 and the recessed aspheric surface 22 of camera lens 1, to constitute one protruding one recessed central minute surface portion 20, and square sheet unit 6 is extruded the back and its outer shroud position 62 is prolonged to extending out in mould 7 simultaneously, forming the rectangular periphery portion 10 of camera lens 1, and four jiao 64 of square sheet unit 6 can be extruded and extend and touch anchor ring 74 to circular die cavity 73, and form the arc chord angle 12 of camera lens 1 respectively.

In step (5), the camera lens 1 of mould model is taken out in shaping mould tool 7, make its cooling after, promptly finish the processing procedure of camera lens 1.

Only, above-mentioned graphic and explanation of taking off only is embodiments of the invention, and is non-for limiting embodiments of the invention; Generally be familiar with the personage of this skill, it complies with feature category of the present invention, and other equivalence of being done changes or modifies, and all should be encompassed in the claim of following this case.

Claims (5)

1. the manufacture method of a square individual optical image capture glass lens is characterized in that, it comprises the following step:

The one flake glass unit material with uniform thickness is provided;

Utilize the first material of above-mentioned flake glass, be cut into several square sheet units, and make each square sheet unit have the uniform thickness of glass unit material;

One lens forming die is provided, and the central part of the upper and lower mould of this mould is provided with a recessed non-ball die face and protruding non-ball die face two corresponding aspheric surface die faces respectively, and the ring periphery in recessed non-ball die face or protruding non-ball die face is provided with a die cavity again;

This square sheet unit is positioned over center in the mould of mould, to carry out the operation of high temperature pressing mold, make the recessed non-ball die face of centre mat mould of square sheet unit and protruding non-ball die face and suppress a convex aspheric surface and a recessed aspheric surface, use the convex aspheric surface and the recessed aspheric surface of the central minute surface portion that constitutes camera lens, and extruded simultaneously and prolonged to extending out in die cavity in the outer shroud edge that makes square sheet unit, uses the rectangular periphery portion that constitutes camera lens;

The camera lens that takes out mould model in the shaping mould tool is finished product.

2. as the manufacture method of claim 1 a described square individual optical image capture glass lens, it is characterized in that the thickness of this glass unit material is 0.40mm.

3. the manufacture method of square individual optical image capture glass lens as claimed in claim 1 or 2 is characterized in that, the length of side of this square sheet unit is 1.70mm.

4. the manufacture method of square individual optical image capture glass lens as claimed in claim 1 is characterized in that, this die cavity is the circular die cavity of a diameter 2.5mm.

5. as the manufacture method of claim 1 or 4 described square individual optical image capture glass lens, it is characterized in that the degree of depth of this die cavity is 0.319mm.

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