Transferability of glass lens molding

Author(s):  
Masahide Katsuki
Keyword(s):  
2012 ◽  
Vol 497 ◽  
pp. 245-249
Author(s):  
Dao Cheng Zhang ◽  
Ke Jun Zhu ◽  
Yong Jian Zhu ◽  
Shao Hui Yin ◽  
Jian Wu Yu

Glass lens molding is a high-volume fabrication method for producing optical components. In this paper, combined with the orthogonal test method and finite element method (FEM) simulation, the coupled thermo-mechanical analysis was carried out to analyze the key process factors. In order to reduce the testing time, an orthogonal test with three sets of level factors and three parameters is conducted to obtain the optimal molding process parameters. The result shows that the most significant parameter is molding velocity, the other effect parameters are molding temperature and friction coefficient. According to the previous analysis of orthogonal experiment, it is shown that the best optimal finishing process parameters were A2B1C1.


2010 ◽  
Vol 447-448 ◽  
pp. 661-665 ◽  
Author(s):  
Junpei Sakurai ◽  
Mitsuhiro Abe ◽  
Masayuki Ando ◽  
Seiichi Hata

This paper presents a search for Ni-Nb-Zr amorphous alloys for application as glass lens molding die materials. To efficiently screen candidate materials, we employed the combinatorial method partially to evaluate thermal stability. First, compositionally spread Ni-Nb-Zr libraries were fabricated by combinatorial arc plasma deposition (CAPD). In order to evaluate the high thermal stability, Ni-Nb-Zr amorphous samples in the libraries were annealed at 723K, the molding temperature for glass lens, for various times in vacuum. Phases in the annealed samples were identified by X-ray diffraction. From XRD identification, candidate amorphous samples with high thermal stabilities were screened. Sputtered samples with the same compositions as the candidate amorphous samples were then fabricated. Other desired properties for glass lens molding die materials, such as mechanical strength, machinability and anti-sticking properties, were evaluated. These investigations revealed Ni36Nb39Zr25 to be a suitable material for a new glass lens molding die. This material exhibited a high fracture stress f of 1.3 GPa, good heat resistance, good machinability, and excellent anti-sticking properties to molten glass.


Author(s):  
Kung Jeng Ma ◽  
H.H. Chien ◽  
W.H. Chuan ◽  
Choung Lii Chao ◽  
K.C. Hwang

2010 ◽  
Vol 97-101 ◽  
pp. 2965-2969
Author(s):  
Yong Jian Zhu ◽  
Shao Hui Yin ◽  
Wei Qing Pan ◽  
Yu Feng Fan ◽  
Kun Tang

The lens molding technology has become a promising fabrication method for glass lens, especially for aspheric glass lens in batch. Because during the real compression molding, the error compensation for mold shape turns very difficult, the mold needs to be repaired repeatedly to meet the requirements of lens molding. To solve this problem, a cooperative design scheme is proposed. However, the scheme is not limited to solving the mold repairing; it also aims to providing the integrated and optimal design for aspheric glass-lens mold. In fact, the cooperative scheme is a collaborative software platform, which integrates with data processing, optical design, finite element analysis, error compensation and mechanical design for lens molding. On this platform, users only need to submit the (camera) lens parameters or measured data of aspheric lens, and then the platform can provide the final mold drawings, which will be input in the CNC software of ultra-precision machine and guide the mold fabrication. Meanwhile, the cooperative platform is Network-based PDM system, so designers could remotely communicate with it and help to finish the mold design jointly. In this case, the cooperative design could tremendously improve the efficiency and accuracy of lens molding.


2009 ◽  
Vol 2009.17 (0) ◽  
pp. _435-1_-_435-2_
Author(s):  
Junpei SAKURAI ◽  
Seiichi HATA ◽  
Ryusuke YAMAUCHI ◽  
Yuko AONO ◽  
Akira SHIMOKOHBE

2013 ◽  
Vol 652-654 ◽  
pp. 1961-1965 ◽  
Author(s):  
Jian Zhou ◽  
Mu Jun Li ◽  
Lian Guan Shen

Glass molding press is an efficient and promising process for glass lens manufacturing. Molding temperature and velocity are crucial factors for pressing, and the annealing rate directly influences the residual stress and volume change of the final lens. The research contributes to studying the key factors that influence the quality of the molded lens. In the paper, by incorporating stress relaxation and structural relaxation of the viscoelastic material, numerical simulation is undertaken to determine the proper process parameters. Furthermore, the whole process of a spherical lens molding is simulated to predict the final residual stress and volume change, also the influence of different annealing rates is estimated.


2014 ◽  
Vol 116 ◽  
pp. 6-10 ◽  
Author(s):  
Shengxian Jiang ◽  
Mitsuhiro Abe ◽  
Masayuki Ando ◽  
Yuko Aono ◽  
Junpei Sakurai ◽  
...  

2017 ◽  
Vol 12 (1) ◽  
pp. 66-76 ◽  
Author(s):  
Shaohui Yin ◽  
Hongpeng Jia ◽  
Guanhua Zhang ◽  
Fengjun Chen ◽  
Kejun Zhu

2006 ◽  
Vol 2006.43 (0) ◽  
pp. 51-52
Author(s):  
Masakazu TATSUMI ◽  
Junnosuke NAKAMURA ◽  
Masahiro ARAI ◽  
Ko-ichi SUGIMOTO ◽  
Hiroaki ITO

Sign in / Sign up

Export Citation Format

Share Document