Non-null compensator design method in digital Moiré interferometry for freeform surface measurement

2016 ◽  
Author(s):  
Qun Hao ◽  
Shaopu Wang ◽  
Yao Hu
Keyword(s):  
Design Method ◽  
Moiré Interferometry ◽  
Freeform Surface ◽  
Surface Measurement ◽  
Moire Interferometry ◽  
Compensator Design ◽  
Digital Moiré

scholarly journals Residual Microstrain in Root Dentin after Canal Instrumentation Measured with Digital Moiré Interferometry

2016 ◽  
Vol 42 (9) ◽  
pp. 1397-1402 ◽  
Author(s):  
Helena Lim ◽  
Fang-Chi Li ◽  
Shimon Friedman ◽  
Anil Kishen
Keyword(s):  
Moiré Interferometry ◽  
Moire Interferometry ◽  
Root Dentin ◽  
Digital Moiré

Application of Digital Moire Interferometry for Mapping Conical Flows

1992 ◽  
Vol 114 (2) ◽  
pp. 246-249
Author(s):  
R. Srikanth ◽  
E. Rathakrishnan
Keyword(s):  
Image Processing ◽  
Image Reconstruction ◽  
Digital Image Processing ◽  
Digital Image ◽  
Low Cost ◽  
Moiré Interferometry ◽  
Moire Interferometry ◽  
Abel Transform ◽  
Conical Flows ◽  
Digital Moiré

Digital Moire Interferometry (DMI)—a low cost and sufficiently sensitive geometric interference technique with very low stability requirement analyzed through digital image processing, has been applied to compressible conical flows. An inverse Abel transform algorithm for image reconstruction from moire deflectograms has been developed.

scholarly journals Asymmetric Double Freeform Surface Lens for Integrated LED Automobile Headlamp

Micromachines ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 663
Author(s):  
Hui Zhang ◽  
Dengfei Liu ◽  
Yinwan Wei ◽  
Hong Wang
Keyword(s):  
Optical System ◽  
Design Method ◽  
Chromatic Dispersion ◽  
Electronic Devices ◽  
Color Temperature ◽  
Freeform Surface ◽  
United Nations Economic Commission ◽  
System A ◽  
Economic Commission ◽  
Key Points

We propose a design method of asymmetric double freeform surface lens for an integrated LED automobile headlamp and develop an integrated LED automobile optical system. A single asymmetric double freeform surface lens is designed to redistribute rays emitting from the light source for realizing both low and high beams. Moreover, a freeform surface reflector is used to improve the energy efficiency of high beams. The prism placed in the optical path can suppress chromatic dispersion on the edge of the target plane. Simulation and experimental results show that the illumination values and color temperature of the key points can fully meet the requirements of United Nations Economic Commission for Europe vehicle regulations (ECE) R112, 48, and 128. The volume of the whole optical system comprised of freeform surface elements is smaller than that of the low beam system of a traditional headlamp, resulting in saved space, in which other electronic devices can be installed for the safety of the driver, which indicates that the proposed method is practical in the field of automobile lighting.

Two-step carrier-wave stitching method for aspheric and freeform surface measurement with a standard spherical interferometer

2018 ◽  
Vol 57 (17) ◽  
pp. 4743 ◽  
Author(s):  
Qun Hao ◽  
Shaopu Wang ◽  
Yao Hu ◽  
Yifeng Tan ◽  
Tengfei Li ◽  
...  
Keyword(s):  
Freeform Surface ◽  
Surface Measurement ◽  
Carrier Wave
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