Design of a free-form surface microlens array optical system with high efficiency and uniformity

2020 ◽  
Vol 59 (23) ◽  
pp. 6939
Author(s):  
Zhenmin Zhu ◽  
Peiqi Yao ◽  
Weihua Zheng
Keyword(s):  
Optical System ◽  
High Efficiency ◽  
Microlens Array ◽  
Free Form ◽  
Free Form Surface

A Golay3 sparse aperture optical system of primary mirror with free-form surface

2021 ◽  
Vol 28 (1) ◽  
pp. 113-118
Author(s):  
Bin Chen ◽  
Quanying Wu ◽  
Junliu Fan
Keyword(s):  
Optical System ◽  
Free Form ◽  
Primary Mirror ◽  
Sparse Aperture ◽  
Free Form Surface

An Optical-Triangulation-Based Method for Measurement of Blade Sections

2015 ◽  
Vol 713-715 ◽  
pp. 395-401
Author(s):  
Yong Zhu ◽  
Jing Liang Liu ◽  
Cheng Wei Li ◽  
Zheng Ya Kang
Keyword(s):  
High Efficiency ◽  
Optical Measurement ◽  
Measurement Methods ◽  
Free Form ◽  
Probe Radius ◽  
Optical Triangulation ◽  
Measurement Results ◽  
Probe Radius Compensation ◽  
Free Form Surface ◽  
Radius Compensation

Blades are an important part of aviation engine, its manufacturing compliance seriously affect the performance of the engine. Blades tend to be free-form surface modeling, which makes it extremely difficult to measurement. Since no probe radius compensation, high efficiency, non-contact optical measurement methods get more and more attention, but the inspection uncertainty of optical measurement is usually between 30um to 50um .To reduces the optical non-contact measurement uncertainty, this paper presents an Optical-triangulation-based method for measurement of blade sections. There is a data optimization process in the method, and this feature makes the proposed method can obtain better measurement results. At last, some experiments demonstrate the effectiveness of this method.

The Free-Form Surface Five-Axis Machining Global Interference Detection and Adjustment of Cutter Shaft

2011 ◽  
Vol 393-395 ◽  
pp. 1550-1553
Author(s):  
Peng Cheng Wu ◽  
Fang Chen Xia ◽  
Hai Ning Tu
Keyword(s):  
Surface Structure ◽  
High Precision ◽  
High Efficiency ◽  
Free Form ◽  
Interference Detection ◽  
Tool Interference ◽  
Free Form Surface ◽  
Five Axis ◽  
Global Surface ◽  
Interference Problems

Proposed a construction method of visual cone, to solve the surface 5-axis NC machining tool interference problems with the surface. At any point on the surface structure the visual cone area, according to visual cone determine whether the global tool interference with surface, and correct the tool spindle of interference cutter, solved the global surface and tool interference problems successfully. The application shows, this method is of high efficiency, high precision.

Design of Off-Axis Three-Mirror Optical System Based on Free-Form Surface

2020 ◽  
Vol 57 (9) ◽  
pp. 092202
Author(s):  
李俊阳 Li Junyang ◽  
李文强 Li Wenqiang ◽  
龙尤 Long You ◽  
周亮 Zhou Liang ◽  
高阳 Gao Yang
Keyword(s):  
Optical System ◽  
Free Form ◽  
Free Form Surface

Design of Free-Form Surface Optic in Wide Field of View Off-Axis Optical System

2011 ◽  
Vol 50-51 ◽  
pp. 806-811 ◽  
Author(s):  
You Long ◽  
Ming Wu Kang ◽  
Xiao Xia Li
Keyword(s):  
Optical System ◽  
Simple Structure ◽  
Optical Design ◽  
Field Of View ◽  
Free Form ◽  
Wide Field ◽  
Design Specification ◽  
Large Size ◽  
Wide Field Of View ◽  
Free Form Surface

Design of off-axis system is a hot and difficult topic in optical design area. The wide field of view(WFOV) off-axis system this paper involved always have the drawbacks of complicated large size and great weight. This paper introduces an application of free-form surface(FFS) in WFOV off-axis optical system design, analyzes FFS optics’ material and fabrication methods. The system uses one FFS lens and one doublet, image quality meets the design specification, and characterizes by simple structure and lightweight.

An Efficient Sensing Localization Algorithm for Free-Form Surface Digitization

2007 ◽  
Author(s):  
Yunbao Huang ◽  
Xiaoping Qian
Keyword(s):  
High Efficiency ◽  
Search Time ◽  
Divide And Conquer ◽  
Free Form ◽  
Point Problem ◽  
Localization Algorithm ◽  
Efficient Manner ◽  
B Spline ◽  
On Line ◽  
Free Form Surface

This paper presents a divide-and-conquer method that finds a near-optimal distribution of sensing locations in a very efficient manner for the free-form surface digitization process. We formulate the sensing localization issue as a next-best-point problem. We transform the uncertainty of a reconstructed B-spline surface into a higher-dimensional uncertainty surface. This further allows the use of convex hull and subdivision properties of B-spline surfaces in the NBP based sensing localization algorithm. It thus dramatically reduces the search time for determining the next best sensing location. Experimental examples demonstrate that the algorithm compares favorably to existing algorithms and, due to its high efficiency, supports both off-line and on-line sensing planning.

Free-form surface-oriented five-axis single-point color printing technology

2018 ◽  
Vol 233 (9) ◽  
pp. 1159-1171 ◽  
Author(s):  
Hongyao Shen ◽  
Senxin Liu ◽  
Senyang Wu ◽  
Linchu Zhang ◽  
Jianfeng Sha
Keyword(s):  
High Efficiency ◽  
Single Point ◽  
Normal Direction ◽  
Free Form ◽  
Three Dimensional Model ◽  
Printing Technology ◽  
Color Printing ◽  
Free Form Surface ◽  
Five Axis ◽  
Self Adaptive

Two-dimensional inkjet technology has made great progress in colorful plane printing. However, color printing technology for three-dimensional model is currently only at the exploratory stage; there are few reports on this issue. In this article, a free-form surface-oriented five-axis single-point printing technology with exclusive color nozzle is proposed. The single-point color nozzle consists of four print heads: prints cyan, magenta, yellow, and black pigment. For high-efficiency color printing, each print head prints on the same single point when the color nozzle moves along the surface. The method of color printing along the surface normal direction is proposed as normal direction printing mode. The algorithm of print point generation is introduced, and the path planning method of self-adaptive slicing and self-adaptive printing filling is proposed. In addition, a five-axis single-point printing platform is designed. Experiments are done to demonstrate the feasibility of the printing system.

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