Non-isothermal molding technology research of ultra-precision glass lens

This paper deals with one-point parallel grinding and magnetorheological finishing (MRF) polishing of micro glass lens mould. Firstly,the analysis and experiment of one-point parallel grinding are conducted on micro-aspheric mould with 10mm in diameter , after grinding ,the results show that the form accuracy of the micro aspheric mould are 2.538 μm in PVand 0.645 μm in RMS, also the subsurface damages and residual grinding marks are left ;And then , the magnetorheological finishing experiment is counducted, the form accuracy achieves 0.892 μm in PV and 0.287 μm in RMS ,after finishing, the surface quality was improved.

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One-Point Nano-Grinding for Micro-Aspherical Glass Lens Mould

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.97-101.4217 ◽

2010 ◽

Vol 97-101 ◽

pp. 4217-4220 ◽

Cited By ~ 3

Author(s):

Shao Hui Yin ◽

Yu Wang ◽

Yu Feng Fan ◽

Yong Jian Zhu ◽

Feng Jun Chen ◽

...

Keyword(s):

Experimental Study ◽

Error Compensation ◽

Grinding Process ◽

Form Error ◽

Precision Grinding ◽

Aspherical Lens ◽

Ultra Precision ◽

Compensation Technique ◽

Glass Lens ◽

Micro Lens

This paper reported an experimental study on ultra-precision grinding for micro aspherical lens mould. One-point grinding mode and inclined axis grinding mode are employed and investigated in grinding process. Grinding test of a micro-lens mould using form error compensation technique is conducted. The experimental results show that ground micro aspheric mould surfaces with form (PV) around 0.122 µm and a roughness (Ra) less than 2 nm is achieved successfully.

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Ultra-Precision Fabrication of Small-Size Aspherical Glass Lens Mold

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.487.29 ◽

2011 ◽

Vol 487 ◽

pp. 29-33

Author(s):

Feng Jun Chen ◽

Shao Hui Yin ◽

Jian Wu Yu ◽

Ke Jun Zhu ◽

Yu Wang

Keyword(s):

Error Compensation ◽

New Technologies ◽

Rapid Development ◽

Optical Lens ◽

Element Simulation ◽

Ultra Precision ◽

Glass Lens ◽

Formation Efficiency ◽

Glass Lenses ◽

Micro Lens

With the rapid development of opto-electronics communications, optics, aerospace and other industries, ultra-precision aspheric glass lenses are widely used in middle/high-grade optical opponent because of its high resolution and imaging quality. To achieve ultra-precision molding pressing of micro-lens, ultra-precision mold must be fabricated firstly. In this paper, some key new technologies were proposed for fabricating ultra-precision mold of small-size aspheric optical lens. A method of finite element simulation was employed to predict mould pressing process of the glass lens for correcting molds and improving the formation efficiency. An ultra-precision inclined-axis grinding and error compensation technology was also used to improve form accuracy of micro lens mold.

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Optical Properties of Aspheric Glass Lens Using DLC Coating Mold

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.345-346.1577 ◽

2007 ◽

Vol 345-346 ◽

pp. 1577-1580 ◽

Cited By ~ 8

Author(s):

Hyun Uk Kim ◽

Sang Hwa Jeong ◽

Hye Jeong Kim ◽

Jeong Ho Kim

Keyword(s):

Precision Grinding ◽

Camera Phone ◽

Form Accuracy ◽

Ion Plating ◽

Dlc Coating ◽

Aspheric Glass Lens ◽

Before And After ◽

Ultra Precision ◽

Glass Lens ◽

Coating Mold

In this research, the optimal grinding condition has been obtained by design of experiment(DOE) for the development of aspheric lens for the 3 Mega Pixel, 2.5x optical zoom camera-phone module. Also, the WC mold was processed by the method of ultra precision grinding under this optimal grinding condition. The influence of DLC coating on form accuracy (PV) and surface roughness(Ra) of the mold was evaluated through measurements after DCL coating using ion plating on the ground mold. Also, aspheric glass lens was molded by before and after the use of the mold of DLC coating, respectively. The optical characteristics of each sample, which were molded by the different mold, were compared with each other.

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