Trends of the Chinese optical manufacturing technology in the early 21st century

Xin, Qiming; Jiang, Yuejuan; Wang, Ping

doi:10.1117/12.402812

Cited by 4 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Currently, the research on equivalence for power system mainly includes model assembly of multi-level network and online/offline model rebuilding. Model assembly of multi-level network builds the equivalent model by analyzing connection network between superior and subordinate dispatching center [3]. Due to the limited access to the latest network model and real-time data of external grid, model assembly method cannot take the dynamic data of outside grid into consideration and cannot reach the accuracy requirement of online security analysis, nor can it meet the requirements of stability analysis (involving differential equations).…”

Section: The Model Of Data Integration and Stitching Processmentioning

confidence: 99%

“…However, the operation and management of power system in China is hierarchical and regional, the dispatching centers are divided into several departments in terms of different professional functions. Therefore, it is not easy to collect external network data timely, which leads to information islands problem and decreases the reliability of power system analysis results [3].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Method of Data Integration Check Based on Online Operation Data of Large-Scale Power System

Ren

Dai

2013

AMM

View full text Add to dashboard Cite

An important part of power grid voltage stability online intelligent warning system was to research into the current Energy Management System real-time power grid operation parameters and power networks offline data splicing integration, form a set of online dynamic simulation trend data, and implement preventive voltage stability calculation. A splicing model of power grid online data integration and practice was established, and a grid online data splicing method was proposed, which had been verified by actual data. The method of practical data online and offline networks data integration can significantly improve the accuracy of the simulation data.

show abstract

Section: The Model Of Data Integration and Stitching Processmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Method of Data Integration Check Based on Online Operation Data of Large-Scale Power System

Ren

Dai

2013

AMM

View full text Add to dashboard Cite

show abstract

“…(1) where, z is material removal, K is proportion coefficient determined by the factors except V and P, V is relative speed of polishing tool to workpiece in a certain time t, P is acting force in workpiece in a certain time t [7]. The well-distributed material removal is the linchpin of getting a surface of high accuracy.…”

Section: Materials Removal Theorymentioning

confidence: 99%

Optimization of Structural Parameter of Shape-Adaptive Tool for Compliant Polishing of Aspheric Parts

Zheng

Zhan

2009

AMM

View full text Add to dashboard Cite

The tool position based on the general interpolation arithmetic will make sharp changes which bring a harmful influence to the mixed control of pose and position as well as the normal force in grinding process. In this paper, a new type of shape-adaptive tool is proposed for the common NC lathe. The effective of shape-adaptive and the stability of polishing force is studied utilizing the dynamic analysis software ADAMS, at the same time, the structural is optimized. The simulation outcome indicates that the tool could both adapt to the surface of workpiece and remove the influence brought by interpolation arithmetic.

show abstract

“…The method has the disadvantages of high cost, complicated processing steps, long time consuming and poor consistency. As for aspherical ones, this method has great difficulty in machining, especially in yield and efficiency [4]. SPDT has been widely used in manufacturing of small and medium-sized infrared lens due to its nanometric sharpness and wear resistance since 1980s [5].…”

Section: Introductionmentioning

confidence: 99%

Single point diamond turning of aspherical surface with high precision assisted by ion beam figuring

Wang¹,

Xu²,

Meng³

2023

Advanced Fiber Laser Conference (AFL2022)

View full text Add to dashboard Cite

High precision infrared lens is of great demand nowadays, especially in the area of remote sensing. The traditional optical machining method couldn't satisfy the processing requirements neither in efficiency nor in quality. Therefore, a novel processing method was used in this paper in order to realize the concave aspherical surface in germanium (Ge) infrared lens with high accuracy. Single point diamond turning technique was first applied for the rapid promotion of surface figure accuracy of the rough machined lens. According to the measurement data obtained by non-contact profile scanning, the shape error in low and middle frequency was figured with compensation processing technology. The value of root mean square (RMS) was constrained within 1/20λ at this stage. As for the residual shape error of high frequency, ion beam deterministic figuring, instead of manual operation, was employed for its high predictability and accuracy. The final RMS of this concave aspherical surface in diameter of 69 mm was improved to 1/30λ based on the above method. Meanwhile, the deviation of vertex radius of curvature was precisely controlled within 0.5 μm, which was far beyond the design requirements by an order of magnitude. The results in this paper have demonstrated that single point diamond turning of infrared lens assisted with ion beam figuring was of unique superiority both in accuracy and efficiency, which has great potential in manufacturing of astronautic optical components.

show abstract

Trends of the Chinese optical manufacturing technology in the early 21st century

Cited by 4 publications

References 0 publications

A Method of Data Integration Check Based on Online Operation Data of Large-Scale Power System

A Method of Data Integration Check Based on Online Operation Data of Large-Scale Power System

Optimization of Structural Parameter of Shape-Adaptive Tool for Compliant Polishing of Aspheric Parts

Single point diamond turning of aspherical surface with high precision assisted by ion beam figuring

Contact Info

Product

Resources

About