Surface particles growing in large aperture optical element （LAOE） have significant impact on LAOE＇s stable operation. It is a challenge for the online system to inspect the particles with long working distance, en...Surface particles growing in large aperture optical element （LAOE） have significant impact on LAOE＇s stable operation. It is a challenge for the online system to inspect the particles with long working distance, enough precision and high efficiency because of the system constraints. In this paper, an effective and portable inspection instrument is designed based on dark-field imaging principle. A Nikon lens and an industrial high definition （HD） camera are selected to construct the vision system to inspect particles of microns size spreading over hundreds of millimeters. Using two motors and other mechanical structure, the system can realize auto-focus and image rectification functions. The line light sources are installed on both sides of the LAOE in a sealed box while the vision system is portable and working outside the box. An adaptive binarization method is proposed to process the captured dark-field image. The distribution of particles on the LAOE＇s surface is investigated. Because of the high resolution of the captured image, the SSE2 instructions optimization method is used to reduce the time cost of the algorithm. Experiments show that the instrument can inspect LAOE effectively and accurately.展开更多
Both the accurate distance measurement and positioning information at the nanoscale are important for the analysis of micro/nano interactions.Plasmon ruler has been an indispensable optical tool to detect the chemical...Both the accurate distance measurement and positioning information at the nanoscale are important for the analysis of micro/nano interactions.Plasmon ruler has been an indispensable optical tool to detect the chemical and biological dynamic processes via distance-dependent plasmon coupling in the nearly aggregated state.But it cannot disclose the detailed and accurate information of positions and dynamic movements of its two plasmonic components owing to the inherent diffraction limit.Herein,a plasmonic locator is presented which consists of a heterotypic pair of red/blue plasmonic components with significant wavelength difference(∼150 nm).Attributed to the detuned energy(∼0.64 eV)of the two components,the plasmonic locator has the ability of sub-diffraction-limited resolution(center to center,30 nm)and accurate positioning under conventional dark-field microscopy,making the relative dynamic information of nearby red/blue components be recorded accurately at video rate.As an important complement to the current aggregate science and technology of plasmonics,this newly developed plasmonic locator presents a facile means to realize super-resolution imaging,accurate positioning,and continuous tracing in chemical and biological interactions at the single-molecule level.展开更多
基金supported by National Natural Science Foundation of China(Nos.61473293,61227804 and 61303177)
文摘Surface particles growing in large aperture optical element （LAOE） have significant impact on LAOE＇s stable operation. It is a challenge for the online system to inspect the particles with long working distance, enough precision and high efficiency because of the system constraints. In this paper, an effective and portable inspection instrument is designed based on dark-field imaging principle. A Nikon lens and an industrial high definition （HD） camera are selected to construct the vision system to inspect particles of microns size spreading over hundreds of millimeters. Using two motors and other mechanical structure, the system can realize auto-focus and image rectification functions. The line light sources are installed on both sides of the LAOE in a sealed box while the vision system is portable and working outside the box. An adaptive binarization method is proposed to process the captured dark-field image. The distribution of particles on the LAOE＇s surface is investigated. Because of the high resolution of the captured image, the SSE2 instructions optimization method is used to reduce the time cost of the algorithm. Experiments show that the instrument can inspect LAOE effectively and accurately.
基金National Natural Science Foundation of China,Grant/Award Numbers:21605125,21874109,22134005Natural Science Foundation of Chongqing,Grant/Award Number:cstc2020jcyj-msxmX0992。
文摘Both the accurate distance measurement and positioning information at the nanoscale are important for the analysis of micro/nano interactions.Plasmon ruler has been an indispensable optical tool to detect the chemical and biological dynamic processes via distance-dependent plasmon coupling in the nearly aggregated state.But it cannot disclose the detailed and accurate information of positions and dynamic movements of its two plasmonic components owing to the inherent diffraction limit.Herein,a plasmonic locator is presented which consists of a heterotypic pair of red/blue plasmonic components with significant wavelength difference(∼150 nm).Attributed to the detuned energy(∼0.64 eV)of the two components,the plasmonic locator has the ability of sub-diffraction-limited resolution(center to center,30 nm)and accurate positioning under conventional dark-field microscopy,making the relative dynamic information of nearby red/blue components be recorded accurately at video rate.As an important complement to the current aggregate science and technology of plasmonics,this newly developed plasmonic locator presents a facile means to realize super-resolution imaging,accurate positioning,and continuous tracing in chemical and biological interactions at the single-molecule level.
