1.6 Precision Grinding, Lapping, Polishing, and Post-Processing of Optical Glass

2017 ◽  
pp. 154-170
Author(s):  
Yaguo Li ◽  
Qinghua Zhang ◽  
Jian Wang ◽  
Qiao Xu ◽  
Hui Ye
Keyword(s):  
Optical Glass ◽  
Post Processing ◽  
Precision Grinding

scholarly journals Effect of Stress Wave between Adjacent Asperities Interaction on Subsurface Damage of Optical Glass in Precision Grinding

Materials ◽  
2019 ◽  
Vol 12 (8) ◽  
pp. 1239
Author(s):  
Chen ◽  
Ren ◽  
Lin
Keyword(s):  
Finite Element ◽  
Optical Glass ◽  
Diamond Particle ◽  
Subsurface Damage ◽  
Propagation Mechanism ◽  
Analysis Model ◽  
Precision Grinding ◽  
Element Analysis ◽  
Analysis Process ◽  
Element Simulation

The interaction between adjacent asperities is a typical characteristic of the grinding process and plays an important role in the material removal mechanism. Therefore, in order to systematically investigate the formation mechanism of the subsurface damage, a precision grinding contact model between the diamond particle and optical glass with adjacent asperities is proposed in our research. The initiation and propagation mechanism of median/lateral cracks under residual stress, the propagation rules of the stress waves on the subsurface, and the interaction between the subsurface damage under stress superposition effect are fully investigated by a theoretical analysis and finite element simulation. The simulation results of the precision grinding model are verified by experiments, which show that the proposed numerical analysis model is reasonable and the finite element analysis process is feasible.

scholarly journals Influence of servo characteristics on crack generation in ultra-precision grinding of optical glass lenses

Procedia CIRP ◽  
2018 ◽  
Vol 77 ◽  
pp. 130-133
Author(s):  
Takumi Suetomi ◽  
Yasuhiro Kakinuma ◽  
Masahiko Fukuta ◽  
Katsutoshi Tanaka
Keyword(s):  
Optical Glass ◽  
Precision Grinding ◽  
Crack Generation ◽  
Ultra Precision ◽  
Glass Lenses

Ultra-precision grinding of optical glass lenses with La-doped CeO2 slurry

CIRP Annals ◽  
2019 ◽  
Vol 68 (1) ◽  
pp. 345-348 ◽  
Author(s):  
Yasuhiro Kakinuma ◽  
Yoshiki Konuma ◽  
Masahiko Fukuta ◽  
Katsutoshi Tanaka
Keyword(s):  
Optical Glass ◽  
Precision Grinding ◽  
Ultra Precision ◽  
Doped Ceo2 ◽  
Glass Lenses ◽  
La Doped

Basic Study on High Efficiency Ultra-Precision Grinding of the Optical Glass Lens

2014 ◽  
Vol 1017 ◽  
pp. 21-26 ◽  
Author(s):  
Rei Sekiguchi ◽  
Shun Yoshikawa ◽  
Yasuhiro Kakinuma ◽  
Katsutoshi Tanaka ◽  
Masahiko Fukuta
Keyword(s):  
Surface Quality ◽  
High Efficiency ◽  
Optical Glass ◽  
High Surface ◽  
Precision Grinding ◽  
Form Accuracy ◽  
Large Aperture ◽  
Highly Efficient ◽  
Ultra Precision ◽  
Glass Lenses

The demand for large aperture lenses with high surface quality and form accuracy used for single-lens reflex cameras has been increasing. Generally, large aperture glass lenses are produced by ultra-precision grinding. Considering the increasing global competition, the grinding process has to be improved. However, highly efficient grinding causes worse surface quality, which leads to much polishing and ultimately results in lower form accuracy. Thus in this study, aiming at the realization of highly efficient and precise grinding of glass lenses, cross grinding of optical glass BK7 is carried out. As a first step of the study, the influence of grinding conditions on the surface quality is investigated experimentally.

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