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Sifting and manufacturing method for macromolecule lens

A polymer and lens technology, which is applied in the field of polymer lens sieve method, can solve problems such as unstable work efficiency, unpredictable actual times of mold repairs, and impact of mold repair times on cost and delivery time, etc.

Inactive Publication Date: 2009-01-14
LINK UPON ADVANCED MATERIAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned existing method of manufacturing lenses with polymer materials, the actual number of mold repairs is unpredictable, and the number of mold repairs affects the cost and delivery time, which creates an unstable problem for work efficiency

Method used

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Examples

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Effect test

Embodiment 1

[0029] This example illustrates the process of screening a biconvex spherical lens with the method of the present invention.

[0030] Design a symmetrical biconvex spherical lens with a focal length of 1.00±0.01 cm. Select the polymer material whose refractive index n is 1.5, then according to the mirror maker's formula of biconvex spherical lens, the radius of the required spherical surface (R 1 = R 2) is 1 cm. Because the required focal length error is within 0.01 cm, it is possible to use a spherical equation with a radius of about 1 cm and change every 0.01 cm to make the cavity of the pre-mold. Therefore, using the previous mold with 20 mold cavities, the radii of the spherical equations are 0.90, 0.91, 0.92, ..., 1.07, 1.08, 1.09 cm to screen the required polymer lens. After processing by injection molding, a lens with a focal length of 1.00±0.005 cm can be screened out. Then according to the spherical equation of the mold cavity screened out, a production mold with ...

Embodiment 2

[0032] This example illustrates the process of sieving an aspheric lens with the method of the present invention.

[0033] Design an aspherical lens with a focal length of 10.0±0.2 cm and low aberration (the maximum focal length difference is less than 0.2 cm). A polymer material with a refractive index n of 1.5 is selected. A radius of 30 centimeters spherical equation (adjustable focal length) and a paraboloid equation y=12(x 2 +y 2 ) Overlapping lens bodies can meet the needs. For a lens with a diameter of 1 cm, with the paraboloid equation y=12(x 2 +y 2 ) is mainly used for aberration focus correction, and y=12(x 2 +y 2 )+c(x 2 +y 2 ) 2 The surface equation is used to make the mold cavity of the previous mold. Because the required aberration focal length error is within 0.2 centimeters, it is desirable to change c every 0.2 centimeters. Using the previous mold with 25 mold cavities, c is -0.4, -0.2, 0, 0.2 and 0.4. And match the spherical equation with radius o...

Embodiment 3

[0035] This embodiment illustrates the process of screening spherical lenses with low chromatic aberration by the method of the present invention.

[0036] Design a group of spherical lens groups with an equivalent focal length of 10.0±0.2 centimeters and a difference of equivalent focal lengths between blue light and red light within 0.2 centimeters. Select polycarbonate (PC) with a refractive index n of 1.58 and an Abbe number A of 58, and an acrylic resin (PMMA) with a refractive index n of 1.49 and an Abbe number A of 30 as materials for compensating for chromatic aberration. Let the focal lengths of the lenses formed by PC and PMMA be f 1 and f 2 , then the equivalent focal length f of the spherical lens group E It can be determined by the following formula:

[0037] 1 / f E =1 / f 1 +1 / f 2 =1 / 10

[0038] while f 1 A 1 +f 2 A 2 =0=58A 1 +30A 2

[0039] Solving the simultaneous equations gives f 1 = 280 / 58 = 4.83, f 2 =-28 / 3=-9.33. Therefore, the required lens...

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PUM

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Abstract

The invention provides a screening method for macromolecule lenses, which comprises the steps of preparing preliminary dies; screening and obtaining die cavities having required functions by using the preliminary dies; manufacturing a production die; screening and obtaining die cavities having proper focal lengths for manufacturing a spherical lens by using the preliminary dies; screening and obtaining die cavities with required focal lengths and aberrations for manufacturing an aspheric lens by using the preliminary dies; screening and obtaining die cavity groups with required equivalent focal lengths and chromatic aberrations for manufacturing a lens battery by using the preliminary dies. The preliminary dies have 3 to 1000 die cavities, however, the preliminary dies preferably have 4 to 400 die cavities; the die cavities of the preliminary dies shall be marked with numbers or letters; the flow passages of the preliminary dies and the production die are balanced; the volumes of the die cavities of the preliminary dies are balanced. In the screening method, die cavities with required functions are screened and obtained by using the preliminary dies; the production die is used for manufacturing the macromolecule lens. The die screened and manufactured according to the functions can reach high precision easily; the frequency to repair the dies is reduced.

Description

technical field [0001] The invention relates to a method for sieving a polymer lens. Background technique [0002] Manufacturing lenses with polymer materials has the advantage of good processability. Generally, the manufacturing method of polymer lens is to directly open the production mold according to the required function (such as focal length). After processing the production mold, test whether the function of the mold cavity meets the requirements, and then modify the mold until the function meets the requirements. [0003] In the above-mentioned existing method of manufacturing lenses with polymer materials, the actual number of mold repairs is unpredictable, and the number of mold repairs affects the cost and delivery time, which creates an unstable problem for work efficiency. Contents of the invention [0004] The main technical problem to be solved by the present invention is to overcome the above-mentioned defects in the prior art, and provide a polymer lens ...

Claims

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Application Information

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IPC IPC(8): B29C33/00B29C33/38B29L11/00
Inventor 蔡宏斌蔡瑞禧林建兴
Owner LINK UPON ADVANCED MATERIAL CORP
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