High precision refractometer for salinity measurements based on aspheric surface

2021 ◽  
Author(s):  
Wei Wei ◽  
Xia Cen ◽  
Xiaoxue Bai ◽  
Chi Wu
Keyword(s):  
High Precision ◽  
Aspheric Surface

Research on Eliminating Cumulative Errors for Stitching Algorithm of Large Aperture Aspheric Optical Elements

2014 ◽  
Vol 924 ◽  
pp. 377-381
Author(s):  
Yan Ting Zhang ◽  
Xu Yang ◽  
Xin Li ◽  
Yin Biao Guo
Keyword(s):  
High Precision ◽  
Measuring Method ◽  
Transformation Method ◽  
Aspheric Surface ◽  
Optical Elements ◽  
Fast Speed ◽  
Large Aperture ◽  
Precision Measuring ◽  
Surface Optical ◽  
Datum Transformation

The sptitching measuring method applied in large-aperture aspheric surface optical elements can expand the range of precision measuring instrument. And the key point is developing the technique for high precision measuring data processing. To deal with the problem of cumulative errors which existed in the process of multi-section stitching, datum-transformation method was proposed, according to the characteristic of stitching measurement. The stitching measuring experiments were carried out based on Talysurf PGI 1240 profilometer of Taylor Hobson Company to verify the purpose for eliminating cumulative errors. The results show that datum-transformation method is feasible with the characteristic such as fast speed, high precision, and good operability.

Study on High-Precision Computer-Controlled Aspheric Surface Processing Techniques

2011 ◽  
Vol 314-316 ◽  
pp. 1750-1753
Author(s):  
Chuan Zhang ◽  
Ping Wang ◽  
Yao Long Chen
Keyword(s):  
High Precision ◽  
Processing Technology ◽  
Surface Grinding ◽  
Aspheric Surface ◽  
Optical Surface ◽  
Surface Processing ◽  
Traditional Technique ◽  
Accuracy Of Measurement ◽  
Computer Controlled ◽  
Processing Techniques

In this paper, two processing techniques—full parameters technique and part parameters technique—for aspheric surface grinding are expatiated. Both of them are based on the priciple of computer-controlled optical surface (CCOS) and developed from trajectory forming method. We also have carried out appropriative software to digitalize processing technology. Proved by practical process, both of them are reliable and reproducible. Full parameters technique is easy to operate, but the accuracy of surface is to large extent dependent on the accuracy of measurement; Part parameters technique can avoid these measurements, however, it has certain requirements for operator. However, its requirements are still much less than those of traditional technique.

A Monitoring and Wireless Transmission System on the Machining Tool

2011 ◽  
Vol 189-193 ◽  
pp. 4182-4185
Author(s):  
Jing Lin ◽  
Yin Biao Guo ◽  
Wei Yang ◽  
Rui Zhu ◽  
Ni Tang
Keyword(s):  
Data Acquisition ◽  
High Precision ◽  
Data Acquisition System ◽  
Transmission System ◽  
Wireless Transmission ◽  
Acquisition System ◽  
Software Framework ◽  
Aspheric Surface

This paper presents a wireless transmission and data acquisition system for monitoring optical aspheric grinding environment. The hardware and software framework of the system is discussed. The result of experiments verifies the system is feasible in high precision aspheric surface manufacturing.

Research on Machining System Design and Machining Method of Micro Optical Aspheric Surface

2007 ◽  
Author(s):  
Hao Huang ◽  
Yinbiao Guo
Keyword(s):  
System Design ◽  
High Precision ◽  
Optical System ◽  
Error Compensation ◽  
High Performance ◽  
Technical Condition ◽  
Aspheric Surface ◽  
Precision Manufacturing ◽  
Surface Machining ◽  
Machining System

At present high precision aspheric surface has been widely used in high performance optical system, but at current technical condition, the machining of high precision aspheric surface is still difficult. According to the requirement of high precision micro aspheric surface machining, three machining method of spherical wheel machining in micro axisymmetric aspheric has been put forward. And a high precision manufacturing and measurement system based on the machining method mentioned above has been designed and realized. It adopts the technology of tool uniform wear and error compensation, can be chose different machining method, and reach to the requirement of high precision micro aspheric surface machining.

Fabrication of High Precision Computer Generated Hologram for Aspheric Surface Testing by Laser-Direct Writing

2014 ◽  
Vol 51 (11) ◽  
pp. 110902
Author(s):  
赵龙波 Zhao Longbo ◽  
张志宇 Zhang Zhiyu ◽  
朱德燕 Zhu Deyan ◽  
延超 Wang Yanchao ◽  
郑立功 Zheng Ligong ◽  
...  
Keyword(s):  
High Precision ◽  
Aspheric Surface ◽  
Direct Writing ◽  
Laser Direct Writing ◽  
Computer Generated Hologram ◽  
Surface Testing

Research on High-Precision Measurement Platform for Optical Aspheric Surface and Corresponding Error Compensation

2010 ◽  
Vol 97-101 ◽  
pp. 4277-4281
Author(s):  
Xiao Long Ke ◽  
Yin Biao Guo ◽  
Kun Pan ◽  
Yong Lu Zhu ◽  
Wei Luo
Keyword(s):  
High Precision ◽  
Precision Measurement ◽  
Error Compensation ◽  
Aspheric Surface ◽  
High Precision Measurement ◽  
Linear Motors ◽  
Probe Radius ◽  
Control Scheme ◽  
Probe Radius Compensation ◽  
Radius Compensation

With a hardware and software control scheme which including high-precision linear motors, contacting and non-contacting measurement sensor and a new developed of measuring software, this paper designs and establishes a high-precision measurement platform. This paper not only implements the hardware build, measuring software development, but also discusses corresponding error compensation, for example, probe radius compensation, rough error canceling and so on. The experimental results indicate that the measurement platform is suitable for high-precision measurement for optical aspheric surface.

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