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narrow-band high-transmittance birefringent filter and its application in wide color gamut display

Chinese Physics B 2021年第5期30卷 401-405页

作者： Chi Zhang Rui Niu Wenjuan Li Xiaoshuai Li Hongmei Ma Yubao Sun School of Electronic and Information Engineering Hebei University of TechnologyTianjin 300401China Department of Applied Physics Hebei University of TechnologyTianjin 300401China

We propose a narrow-band birefringent filter and its application in wide color *** birefringent filter consists of five phase retarders and two polarizers,and it has both narrow band and high *** the experiment,we fabricate the birefringent filter using quartz phase retarders and polarizers,and apply it in serval different *** color gamuts of displays are enhanced more than 30%NTSC(National Television System Committee),and the widest color gamuts that have been obtained are 126%NTSC in liquid crystal displays and 138%NTSC in organic light-emitting ***,the deep blue light in spectrum of display can be reduced using the birefringent *** birefringent filter can be an efficient element to achieve wide color gamut display.

关键词： narrow band filter wide color gamut display

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Vision sensing of P-GMAW weld pool using narrow band filters with different center wavelengths

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China Welding 2013年第1期22卷 41-46页

作者：梁志敏汪殿龙王军 School of Material Science and Technology Hebei University of Science and Technology Shijiazhuang 050018

The selection of narrow band filter＇s center wavelength has an important influence on the quality of the weld pool image captured in passive vision mettmd for controlling arc welding process. In this paper, 29 narrow band filters with different center wavelengths ranging from ultraviolet to near infrared wavelength were used to capture images of weld pool during both the peak current period and the base current period of P-GMA W （ pulsed gas metal arc welding）. The experimental results showed that the filters with near infrared center wavelength could weaken the arc most during the peak current period, while during the base current period the entire weld pool could be seen with the filters with wavelength above 600 nm. The camera spectral response and the radio of arc to weld pool emission were considered to analyze the phenomenon of experimental results.

关键词： narrow band filter weld pool vision sensing pulsed gas metal arc welding

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Multiframe imaging of femtosecond order ultrafast process

Multiframe imaging of femtosecond order ultrafast process

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中国光学学会2011年学术大会

作者： Lu Xiaowei,Li Jingzhen*,Xu Shixiang Shenzhen Key Laboratory of Micro Nano Photonic Information Technology Shenzhen University,518060,China

＜正＞With the requirements of scientific researches at the uttermost condition and for the finecosmic and the microcosmic ultra-high speed processes,the extremely-high speed imaging is now being taken into *** ultraf... 详细信息

关键词： ultrafast process continues recording digital holography wavelength framing narrow band filter

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