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.

The fabrication of high filling factor double side micro lens array with high alignment accuracy

2011 ◽  
Author(s):  
Yuan-Chieh Cheng ◽  
Chun-Chieh Chen ◽  
Wei-Yao Hsu ◽  
Pei Jen Wang ◽  
Din Ping Tsai
Keyword(s):  
Filling Factor ◽  
Alignment Accuracy ◽  
Lens Array ◽  
High Filling Factor ◽  
Micro Lens Array ◽  
Micro Lens

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.

P-83: Large Depth Integral Imaging Using Piano-Convex Micro-Lens Array and Flat-Panel Array

2014 ◽  
Vol 45 (1) ◽  
pp. 1295-1297
Author(s):  
Pan Wang ◽  
Ya-Zhou Wang ◽  
Da-Hai Li ◽  
Huan Deng ◽  
Qiong-Hua Wang
Keyword(s):  
Flat Panel ◽  
Integral Imaging ◽  
Lens Array ◽  
Large Depth ◽  
Micro Lens Array ◽  
Micro Lens

Fabrication of a Micro Lens Array with a High Filling Factor Using a Direct Molding Method

2013 ◽  
Vol 773-774 ◽  
pp. 712-721
Author(s):  
Chien Yao Huang ◽  
Chun Chieh Chen ◽  
Hsiao Yu Chou ◽  
Wei Long Peng ◽  
Yu Wei Lin
Keyword(s):  
Filling Factor ◽  
Injection Pressure ◽  
Electroless Nickel ◽  
Effective Area ◽  
Diamond Turning ◽  
Polymer Materials ◽  
Molding Method ◽  
High Filling Factor ◽  
Ultra Precision ◽  
Micro Lens

In recent years, micro lens arrays have played a crucial role in optical illumination systems. The function of micro lens arrays (MLAs) is to create a uniform light intensity or shape the light profile. Polymers that are commonly used as MLAs have several advantages, such as cost effectiveness, light weight, and easy formation. In general, the ultra-precision diamond-turning technique and plastic injection molding technique have been combined to fabricate MLAs with polymer materials. However, residual stress and non-balance injection pressure are produced on MLAs during injecting processing. Therefore, this paper presents the fabrication of MLAs using a direct molding method (DMM). The STAVAX with electroless nickel coating and PMMA were used as the mold and polymer preform, respectively. First, a mold of MLA with 100% filling factor was fabricated using the ultra-precision diamond-turning technique. A high filling factor can decrease the non-effective area of the MLA in an optical system. Subsequently, an MLA was formed on the PMMA surface using DMM processing. This paper shows the DMM process parameters, including molding temperature, molding force, and cooling rate. Moreover, the profile of the MLA was measured using a laser confocal microscope. Finally, a high filling factor MLA with a diameter of 11.5 mm, and lenses with a height of 8.5 μm and a radius of 470 μm were formed on PMMA.

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

Depth-enhanced integral imaging display based on plano-convex micro-lens array and flat-panel array

Optik ◽  
2015 ◽  
Vol 126 (24) ◽  
pp. 5744-5747 ◽  
Author(s):  
Pan Wang ◽  
Qiong-Hua Wang ◽  
Ya-Zhou Wang ◽  
Da-Hai Li
Keyword(s):  
Flat Panel ◽  
Integral Imaging ◽  
Lens Array ◽  
Micro Lens Array ◽  
Micro Lens

scholarly journals Tuneable Liquid Crystal Micro-Lens Array for Image Contrast Enhancement in a Pixelated Thin Film Photo-Transistor Flat Panel Imager

Micromachines ◽  
2017 ◽  
Vol 8 (7) ◽  
pp. 205 ◽  
Author(s):  
Kun Li ◽  
Daping Chu ◽  
Jiaqi Chu ◽  
Shuhei Kitajima ◽  
Tokiyoshi Matsuda ◽  
...  
Keyword(s):  
Thin Film ◽  
Liquid Crystal ◽  
Contrast Enhancement ◽  
Image Contrast ◽  
Flat Panel ◽  
Lens Array ◽  
Image Contrast Enhancement ◽  
Micro Lens Array ◽  
Micro Lens

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

scholarly journals Phase Retrieval with a Diffractive Micro Lens Array

2014 ◽  
Vol 8 (4) ◽  
pp. 251-259
Author(s):  
Xiyuan Liu ◽  
Karl-Heinz Brenner
Keyword(s):  
Phase Retrieval ◽  
Lens Array ◽  
Micro Lens Array ◽  
Micro Lens

Morphology Evolution and Luminescence Properties of YF3: Sm Nano-/Microcrystals

2012 ◽  
Vol 463-464 ◽  
pp. 112-118
Author(s):  
Feng Tao ◽  
Geng Zhu ◽  
Zhi Jun Wang ◽  
Feng Pan ◽  
Yu Feng Sun ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Growth Mechanism ◽  
Room Temperature ◽  
Red Light ◽  
Environmentally Friendly ◽  
Morphology Evolution ◽  
Flat Panel Display ◽  
Flat Panel ◽  
Display Devices ◽  
Potential Applications

Abstract. Recently, there has been increasting interest in the doping of nano-/microcrystal hosts with Sm3+. However, very few examples of Sm3+doped YF3-based nanophosphors have been reported. In this paper, a variety of uniform YF3:Sm nano-/microcrystals have been successfully prepared by a facile, effective, and environmentally friendly hydrothermal method. The morphology evolution process has been investigated by quenching the reaction at different time. Based on the results, a possible growth mechanism is presented in detail. The as-obtained YF3:Sm nano-/microcrystals show strong yellow and red light emissions under room temperature, which is quite different from those reported previously and might find potential applications in fields such as light phosphor powers and advanced flat panel display devices.

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