Optical lens

一种光学透镜、二醇的技术，应用在光学、光学元件、仪器等方向，能够解决低阿贝数、污染模具、着色增加等问题，达到低阿贝数、生产率高的效果

Inactive Publication Date: 2011-06-08
MITSUBISHI GAS CHEM CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to improve the moldability, it is considered that the melt viscosity during molding is lowered, that is, there is a method of increasing the molding temperature, but there are disadvantages such as increased coloring during molding or contamination of the mold with pyrolysis products.
In addition, there is a method of lowering the melt viscosity by lowering the degree of polymerization, but in this case, there is also a problem that the low molecular weight component in the resin is relatively increased, and low molecular weight substances or decomposition products of low molecular weight substances contaminate the mold.
An optical lens formed of a thermoplastic resin having both excellent optical properties (high refractive index, low Abbe number) and practically sufficient moldability has not yet been disclosed

Method used

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Experimental program
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Effect test

Embodiment 1～5、 comparative example 1、2

[0074] 〔Manufacture and evaluation of polyester resins〕

[0075] In the 0.15 cubic meter polyester manufacturing device equipped with a packed column rectification tower, a splitter, a full shrinker, a cooling tank, a stirrer, a heating device, and a nitrogen introduction pipe, add the raw material monomers listed in Table 1 and 2, In the presence of 0.03 mol % of manganese acetate tetrahydrate with respect to the dicarboxylic acid component, the temperature was raised to 215° C. under a nitrogen atmosphere, and transesterification was performed. After the reaction conversion rate of the dicarboxylic acid component is above 90%, add 0.02 mol% of antimony (III) oxide and 0.06 mol% of triethyl phosphate to the dicarboxylic acid component. Polycondensation is carried out below kPa. The reaction is terminated when an appropriate melt viscosity is reached to produce a polyester resin.

[0076] The evaluation results are shown in Tables 1 and 2.

[0077] In addition, the meanings...

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PUM

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Abstract

Disclosed is an optical lens composed of a polyester resin, which has a high refractive index, a low Abbe number and good formability. The optical lens is obtained by injection-molding a polyester resin wherein 40-99% by mole of the diol units is derived from ethylene glycol, 1-60% by mole of the diol units is derived from a diol having 3-16 carbon atoms, and not less than 50% by mole of the dicarboxylic acid units is derived from a naphthalene dicarboxylic acid.

Description

technical field [0001] The present invention relates to an optical lens composed of a polyester resin having a specific structure. Background technique [0002] Optical glass or optical transparent resin is suitable as a material for optical elements used in the optical system of various cameras such as camera cameras, film-integrated camera cameras, and video camera cameras. Optical glass has various materials that are excellent in heat resistance, transparency, dimensional stability, and chemical resistance, and has various refractive indices and Abbe numbers. However, there are problems in that the material cost is high and the molding process Poor performance, and low productivity. In particular, processing an aspheric lens used for aberration correction requires extremely high technology and high cost, which hinders practical use. [0003] On the other hand, optical lenses made of optical transparent resins, especially thermoplastic transparent resins, have the advant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/04C08G63/189C08G63/672
CPCG02B1/041C08G63/672Y10S359/90C08G63/189C08L67/02
Inventor 广兼岳志加藤宣之
Owner MITSUBISHI GAS CHEM CO INC
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