A Novel Format of Depth Map Image

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.

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Multi-Axis Controlled Ultraprecision Machining and Measurement

International Journal of Automation Technology ◽

10.20965/ijat.2009.p0227 ◽

2009 ◽

Vol 3 (3) ◽

pp. 227-232 ◽

Cited By ~ 6

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.

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

10.1117/12.2037486 ◽

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

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

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C ◽

10.1299/kikaic.77.2146 ◽

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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A Residual Network and FPGA Based Real-Time Depth Map Enhancement System

Entropy ◽

10.3390/e23050546 ◽

2021 ◽

Vol 23 (5) ◽

pp. 546

Author(s):

Zhenni Li ◽

Haoyi Sun ◽

Yuliang Gao ◽

Jiao Wang

Keyword(s):

Real Time ◽

Super Resolution ◽

Depth Map ◽

Acquisition System ◽

Depth Image ◽

Fpga Design ◽

Depth Sensing ◽

Residual Network ◽

Real Time Processing ◽

Depth Maps

Depth maps obtained through sensors are often unsatisfactory because of their low-resolution and noise interference. In this paper, we propose a real-time depth map enhancement system based on a residual network which uses dual channels to process depth maps and intensity maps respectively and cancels the preprocessing process, and the algorithm proposed can achieve real-time processing speed at more than 30 fps. Furthermore, the FPGA design and implementation for depth sensing is also introduced. In this FPGA design, intensity image and depth image are captured by the dual-camera synchronous acquisition system as the input of neural network. Experiments on various depth map restoration shows our algorithms has better performance than existing LRMC, DE-CNN and DDTF algorithms on standard datasets and has a better depth map super-resolution, and our FPGA completed the test of the system to ensure that the data throughput of the USB 3.0 interface of the acquisition system is stable at 226 Mbps, and support dual-camera to work at full speed, that is, 54 fps@ (1280 × 960 + 328 × 248 × 3).

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