Multi-Axis Controlled Ultraprecision Machining and Measurement

2009 ◽  
Vol 3 (3) ◽  
pp. 227-232 ◽  
Author(s):  
Hirofumi Suzuki ◽  
Keyword(s):  
Ultrasonic Vibration ◽  
Measuring System ◽  
Precision Machining ◽  
Ultraprecision Machining ◽  
Optical Components ◽  
Contact Type ◽  
Digital Devices ◽  
Ultra Precision ◽  
Micro Lens Array ◽  
Micro Lens

Demands of micro aspheric optical components such as lenses and mirrors are increasing for installing to the digital devices. As the devices become to be more compact and complicated, the molds shapes of lens and mirrors would become more difficult to be machined and measured. In this study, multi-axis controlled ultra precision machining/grinding and on-machine measurement technologies are developed for manufacturing of the complicated and micro molds. In this paper, the next four technologies are focused: (1) micro fresnel grinding, (2) Micro lens array grinding, (3) Ultrasonic vibration assisted polishing, and (4) Contact type of multi axis controlled on-machine measuring system.

Random micro-lens array illumination device manufactured by ultra-precision machining

2014 ◽  
Author(s):  
Yukinobu Nishio ◽  
Kayoko Fujimura ◽  
Sho Ogihara ◽  
Masato Okano ◽  
Seiichiro Kitagawa
Keyword(s):  
Precision Machining ◽  
Lens Array ◽  
Ultra Precision ◽  
Micro Lens Array ◽  
Array Illumination ◽  
Micro Lens

scholarly journals Ultraprecision Machining. Ultra-precision Machining by Plasma CVM.

Hyomen Kagaku ◽  
2001 ◽  
Vol 22 (3) ◽  
pp. 160-166
Author(s):  
Kazuya YAMAMURA ◽  
Yasuhisa SANO ◽  
Yuzo MORI
Keyword(s):  
Precision Machining ◽  
Ultraprecision Machining ◽  
Ultra Precision

A Novel Format of Depth Map Image

2016 ◽  
Vol 679 ◽  
pp. 97-101
Author(s):  
Chang Yuen Chan ◽  
Li Hua Li ◽  
Wing Bun Lee ◽  
Ya Hui Liu
Keyword(s):  
Computer Graphics ◽  
Depth Map ◽  
Distance Information ◽  
Depth Maps ◽  
Shadow Mapping ◽  
Image Channel ◽  
Ultra Precision ◽  
Micro Lens Array ◽  
Data Length ◽  
Micro Lens

When the micro lens array machined by an ultra-precision machine was used in 3D computer graphics, a novel format of depth map image was invented with adaptively variable data length for multi requirements of different 3D computer graphics applications. A depth map is an image or image channel that contains information relating to the distance of the surfaces of objects a scene from a viewpoint. Depth maps can be applied for many functions: defocusing, rendering of 3D scenes, shadow mapping and other distance information-related applications.

C10 Precision machining and measurement of micro lens array mold

2010 ◽  
Vol 2010.8 (0) ◽  
pp. 167-168
Author(s):  
Hirofumi Suzuki ◽  
Mutsumi Okada ◽  
Yoshinori Shirafuji ◽  
Kohji Watanabe ◽  
Nobuo Matsuoka ◽  
...  
Keyword(s):  
Precision Machining ◽  
Lens Array ◽  
Micro Lens Array ◽  
Micro Lens

Ultra Precision Diamond Shaping of an Elliptical Micro-Lens Array

2009 ◽  
Vol 407-408 ◽  
pp. 380-383
Author(s):  
Choung Lii Chao ◽  
Chun Chieh Chen ◽  
Wen Chen Chou
Keyword(s):  
Filling Factor ◽  
Flat Panel Display ◽  
Flat Panel ◽  
Lens Array ◽  
Display Devices ◽  
High Filling Factor ◽  
Ultra Precision ◽  
Micro Lens Array ◽  
Micro Lens ◽  
Better Than

Micro lens array is widely used in photonics and telecommunication products, including back-light module of flat panel display devices and white-light LED illumination. The ultra precision diamond shaping method together with tool servo technique was studied and developed in this research to generate elliptical micro lens array. Each elliptical micro lens has radii in X and Y direction of 1.0 mm and 1.5 mm respectively. A high filling-factor (100 %) elliptical micro lens array with form accuracy better than 0.15μm and surface roughness around 5nm Ra was successfully fabricated.

Fabrication of Aspheric Micro Lens Array by Slow Tool Servo

2009 ◽  
Vol 76-78 ◽  
pp. 479-484 ◽  
Author(s):  
Chun Chieh Chen ◽  
Choung Lii Chao ◽  
Wei Yao Hsu ◽  
Fong Chi Chen ◽  
Chung Woei Chao
Keyword(s):  
Tool Path ◽  
Diamond Turning ◽  
Lens Array ◽  
Fast Development ◽  
Ultra Precision ◽  
Slow Tool Servo ◽  
Micro Lens Array ◽  
Array Fabrication ◽  
Micro Lens ◽  
Better Than

Owing to the fast development in photonic, telecommunication, and opto-electronic industries, the demand for various micro-lens arrays is rapidly growing. The slow tool servo technique was applied on an ultra-precision diamond turning machine in the present research in conjunction with the tool path generating algorithm for aspheric micro-lens array fabrication. An aspheric lens array of 100% filling factor was successfully produced and the form accuracy and surface roughness were better than 0.15μm and 3nm for all the obtained lenses.

Experimental investigations on ultra-precision machining of polycarbonate and related issues

2020 ◽  
pp. 251659842093849
Author(s):  
Vinod Mishra ◽  
Rohit Sharma ◽  
Kuldeep Mahajan ◽  
Jayant Kumar ◽  
Neha Khatri ◽  
...  
Keyword(s):  
Surface Quality ◽  
Cutting Temperature ◽  
Precision Machining ◽  
Experimental Investigations ◽  
Machining Parameters ◽  
Optical Components ◽  
Good Surface ◽  
Ultra Precision ◽  
Deterministic Processes ◽  
Glass Optics

Optical plastic lenses are progressively substituting glass optics due to their lightweight and low costs. Polycarbonate (PC) is considered as one of the leading optical materials due to its good mechanical and optical properties. Ultra-precision machining is the most suited process to develop PC optical components. Nevertheless, ultra-precision machining is considered as one of the deterministic processes to ensure the surface quality required for optical components. However, it is important to understand the behavior of the material during each stage of manufacturing. PC offers many challenges during its processing to achieve the nanometric finish and sub-micron form accuracies. In this article, the various issues of PC machining are discussed through experimental investigations. The effect of machining variables, that is, machining parameters, cutting temperature, and vacuum clamping on surface quality is studied. The results show the importance of the selection of optimum conditions for machining PC with good surface quality. The PC optical component is developed with surface finish ( Ra) 18.1 nm and profile accuracies ( Pv) of 0.116 µm. The study is helpful to understand the various issues involved in PC machining and hence to minimize their effects on surface quality.

scholarly journals Ultra Precision Cutting of Roll Die with Micro Lens Array for Plastic Film

2011 ◽  
Vol 77 (777) ◽  
pp. 2146-2152
Author(s):  
Takehisa YOSHIKAWA ◽  
Masayuki KYOI ◽  
Hideaki TANAKA ◽  
Hideaki ONOZUKA ◽  
Yukio MAEDA ◽  
...  
Keyword(s):  
Plastic Film ◽  
Lens Array ◽  
Ultra Precision ◽  
Micro Lens Array ◽  
Micro Lens
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