Chinese Academy of Sciences

Headwaters Technology Innovation, LLC

Changchun Institute of Biological Products, Ministry of Public Health

Changchun Institute of Optics, Fine Mechanics and Physics, Academy of Sciences

Wei Wang

Wenhao Li

Zhaowu Liu

Shan Jiang

Hongzhu Yu

Rigalantu Ji

Xuefeng Yao

Bing Zhou

Lin Liu

Changkun Liu

Jing Liu

Yujia Sun

Wenyuan Zhou

Pengfu Wang

Xu Liang

Guangpu Li

Baosheng Xie

Zongming Song

Shuyan Li

Yanxiu Jiang

Ben Liang

Siyu Jin

Yubo Li

Jingye Liu

Ling Zhang

Xinyu Wang

Bayan Heshig

Jing Li

Xizhen Guangpu Zhang

Hongnan Zhang

Yuhong Li

Hui Lin

Heshig Bayan

Lingjiu Liu

Shuo Li

Ce Wang

Xingyu Zhu

Yong Xue

Zhenyu Li

Zongju Wan

Wei Zheng

Ying Yu

A method and a device for compensating a surface error of a holographic grating substrate based on scanning and exposure technology relates to a technical field of grating development. The method and the device adopt surface error compensation technology based on phase modulation of interference fringes of a scanning beam interference lithography system. The method and the device solve a poor grating diffraction wavefront quality caused by a surface processing error in a field of holographic grating research and improves full-aperture diffraction wavefront quality of a grating. Through coordination between feedback of the displacement measurement apparatus for the position of the two-dimensional worktop and the modulation of the scanning beam interference lithography system, full-aperture compensation of the surface error of the holographic grating substrate is achieved, which not only reduces processing accuracy requirements for the holographic grating substrate, but also improves the full-aperture diffraction wavefront quality of the grating.

Method and device for compensating surface error of holographic grating substrate

The present invention relates to the field of optics, in particular to a hybrid displacement measuring device, comprising a worktable to be measured, a grating ruler, a laser light source, a first beam splitting mirror, a first measuring assembly, and a second measuring assembly which comprises a first interferometer. A hybrid measuring approach that integrates grating and laser is proposed based on the advantages of the two measuring means. The grating ruler is used to perform long-distance measurement distal to the mirror, and the first interferometer is used to perform short-distance measurement proximal to the mirror, thereby solving the problem that it is difficult to guarantee both the range and the precision of displacement measurement of the worktable to be measured.

Hybrid displacement measuring device

Disclosed are a grating displacement measurement device and a grating displacement measurement method using a double-layer floating reading head, a medium, and an apparatus. A first measurement grating group is arranged on two first side edges of a substrate working surface, and a second measurement grating group is symmetrically arranged on both sides of a first reference line and close to a light-through member. A reading component is provided between a first measurement grating and a second measurement grating arranged on the same side, and each reading component is used to collect a first position information of the first measurement grating and a second position information of the second measurement grating. In the technical solutions, by using multi-channel position information output by two reading components in combination with a displacement solution algorithm.

Grating displacement measurement device and method using double-layer floating reading head, medium, and apparatus

A heterodyne two-dimensional grating measuring device and measuring method thereof includes a light source, a reading head, a photoelectric receiving module, and a processor. The light source is configured to generate two beams of linearly polarized light having characteristics of overlapping, polarization orthogonal, and fixed frequency difference. The reading head is configured to receive the two beams of the linearly polarized light, the two beams of the linearly polarized light are respectively incident on a surface of a moving two-dimensional measuring grating to generate ±1-order diffracted lights of two dimensions, and the ±1-order diffracted lights are respectively incident to the photoelectric receiving module through the reading head. The photoelectric receiving module is configured to generate beat frequency signals, the processor is configured to perform differential calculation on the beat frequency signals to realize a displacement measurement of measuring grating for four-fold optical subdivision.

Heterodyne two-dimensional grating measuring device and measuring method thereof

A heterodyne one-dimensional grating measuring device and measuring method thereof, including a light source, a reading head, a photoelectric receiving module, and a signal processing system. The light source is configured to generate two linearly polarized lights having characteristics of overlapping, polarization orthogonal, and fixed frequency difference. The reading head is configured to receive two beams of polarized lights and be respectively incident on a surface of a moving measuring grating to generate a +1-order diffracted light and a −1-order diffracted light. The photoelectric receiving module is configured to receive the +1-order diffracted light and the −1-order diffracted light to form two paths of beat frequency signals. The signal processing system is configured to perform differential calculation on the two paths of the beat frequency signals to realize a displacement measurement of single diffraction of the measuring grating for four-fold optical subdivision.

Heterodyne one-dimensional grating measuring device and measuring method thereof

A self-cleaning humidity sensor based on Mg/Na-doped TiOnanofiber mats is provided. Examples show the response and recovery characteristic curves for ten circles with the RH changing from 11% to 95%. The nanofibers are manufactured by mixing together a metal salt comprising titanium, a magnesium compound, a sodium compound, and a high molecular weight material to form a mixture, electrospinning the mixture to form composite nanofibers, and calcining the composite nanofibers to yield a TiOnanofiber material doped with magnesium and sodium.

Nanofibers and methods of making same and using same in humidity sensors

The present invention relates to hepatitis A vaccine, especially to a lyophilized attenuated hepatitis A vaccine which can be stored at ambient temperature for extended periods of time, and to a method for producing the same. The present invention further relates to a stabilizer for lyophilized live vaccine and its use in improving thermostability of lyophilized live vaccine during lyophilization processing and storage period after lyophilization.

Freeze-dried hepatitis A attenuated live vaccine and its stabilizer

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Changchun, China

Wei Wang