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

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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A Deterministic Method to Predict Geometrical Interference between Grinding Wheel and Workpiece for Ultra-Precision Aspherical Grinding

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.135.325 ◽

2010 ◽

Vol 135 ◽

pp. 325-330

Author(s):

Shao Hui Yin ◽

Ze Biao Wang ◽

Yu Wang ◽

Feng Jun Chen ◽

Jian Wu Yu

Keyword(s):

Maximum Diameter ◽

Grinding Wheel ◽

Grinding Process ◽

Aspheric Surface ◽

Precision Grinding ◽

Deterministic Method ◽

Aspherical Lens ◽

Ultra Precision ◽

Relationship Of ◽

The Relationship

This paper reported a deterministic method to predict geometrical interferences between grinding wheel and workpiece on ultra-precision grinding for micro aspherical lens mould. An inclined axis grinding mode controlled by B axis is considered and investigated. For avoiding the interference between the grinding wheel and the workpiece, the relationship of the radius of the grinding wheel should be analyzed in the grinding process. In this paper, a geometrical mathematical model for avoiding interferences between grinding wheel and workpiece is built up, and three interference conditions are analyzed. The maximum diameter of the cylindrical grinding wheel is computed and obtained for grinding axisymmetric aspheric surface.

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An on-machine error compensation method for an ultra-precision turning machine

Proceedings of the Institution of Mechanical Engineers Part B Journal of Engineering Manufacture ◽

10.1177/0954405417731471 ◽

2017 ◽

Vol 233 (5) ◽

pp. 1608-1613

Author(s):

Xicong Zou ◽

Xuesen Zhao ◽

Guo Li ◽

Zengqiang Li ◽

Zhenjiang Hu ◽

...

Keyword(s):

Error Compensation ◽

Rapid Development ◽

Compensation Method ◽

Machining Accuracy ◽

Manufacturing Cost ◽

Program Code ◽

Machine Error ◽

Measurement Results ◽

Ultra Precision ◽

Compensation Technique

On-machine error compensation (OMEC) is efficient at improving machining accuracy without increasing extra manufacturing cost, and involves the on-machine measurement (OMM) of machining accuracy and modification of program code based on the measurement results. As an excellent OMM technique, chromatic confocal sensing allows for the rapid development of accurate and reliable error compensation technique. The present study integrated a non-contact chromatic confocal probe into an ultra-precision machine for OMM and OMEC of machined components. First, the configuration and effectiveness of the OMM system were briefly described, and the relevant OMEC method was presented. With the OMM result, error compensation software was then developed to automatically generate a modified program code for error compensation. Finally, a series of cutting experiments were performed to verify the validity of the proposed OMEC method. The experimental results demonstrate that the proposed error compensation method is reliable and considerably improves the form error of machined components.

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A study of the ultra precision grinding process on a magnetic disk substrate—development of new bonding materials for fixed abrasives of grinding stone

Wear ◽

10.1016/0043-1648(95)06792-2 ◽

1996 ◽

Vol 195 (1-2) ◽

pp. 74-80 ◽

Cited By ~ 12

Author(s):

Y. Tomita ◽

H. Eda

Keyword(s):

Grinding Process ◽

Precision Grinding ◽

Magnetic Disk ◽

Ultra Precision ◽

Grinding Stone ◽

Disk Substrate

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An Experimental Investigation of Optimal Grinding Condition for Aspheric Surface Lens Using Full Factorial Design

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.329.27 ◽

2007 ◽

Vol 329 ◽

pp. 27-32 ◽

Cited By ~ 1

Author(s):

Seung Yub Baek ◽

Jung Hyung Lee ◽

Eun Sang Lee ◽

H.D. Lee

Keyword(s):

Surface Roughness ◽

Ground Surface ◽

Diamond Wheel ◽

Aspheric Surface ◽

Precision Grinding ◽

Spherical Lens ◽

Ultra Precision ◽

Ground Surface Roughness ◽

Grinding System ◽

Micro Lens

To enhance the precision and productivity of ultra precision aspheric surface micro lens, the development of ultra-precision grinding system and process for the aspheric surface micro lens are described. In this paper, an ultra-precision grinding system for manufacturing the aspheric surface micro lens was developed by considering the factors affecting the grinding surface roughness and profile accuracy. This paper deals with the mirror grinding of an aspheric surface micro lens by resin bonded diamond wheel and with the spherical lens of BK7. The optimization of grinding conditions with respect to ground surface roughness and profiles accuracy is investigated by design of experiments.

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