全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
物理学报  2007 

Optical-readout micro-cantilever array IR imaging system and performance analysis
光学读出微梁阵列红外成像及性能分析

Keywords: uncooled infrared imaging,optical readout,bi-material micro-cantilever array,thermal conductance
非制冷红外成像
,光学读出,双材料微梁阵列,热导

Full-Text   Cite this paper   Add to My Lib

Abstract:

The uncooled IR imaging technology has wide applications. Using the optical readout uncooled IR imaging system built in our laboratory, thermal images of human body are obtained successfully by placing a bi-material micro-cantilever array (FPA) without silicon substrate in air. By comparing the IR imaging results obtained by placing FPA under different vacuum pressures, the pressure dependence of the thermal conductance and system noise is modeled, and the influence to the system performance is analyzed. The model of thermal conductance of gas is analyzed and verified experimentally on condition that the mean-free path of the gas molecules is larger than the gas gap between the bi-material cantilever and the wall of vacuum chamber. Experimental analysis indicates that for FPA working in air, the random vibration noise of the cantilever impacted by the gas molecules' thermal motion is the main source of the system noise. When the pressure decreases to lower than 10-2 Pa, the influence of gas conductance can be neglected, the total thermal conductance decreases to the limit of radiative conductance, and the random vibration noise of the cantilever is reduced to a minimum. The experimental results and theoretical analysis agree well.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133