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

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.

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C10 Precision machining and measurement of micro lens array mold

The Proceedings of The Manufacturing & Machine Tool Conference ◽

10.1299/jsmemmt.2010.8.167 ◽

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

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Ultra Precision Diamond Shaping of an Elliptical Micro-Lens Array

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.407-408.380 ◽

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.

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Fabrication of Aspheric Micro Lens Array by Slow Tool Servo

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.76-78.479 ◽

2009 ◽

Vol 76-78 ◽

pp. 479-484 ◽

Cited By ~ 3

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.

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