红外弱光与光纤束限制下的信号捕捉

红外弱光与光纤束限制下的信号捕捉

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一、客户痛点

在850nm/890nm红外波段火焰观测中,通过900×900光纤束实现多角度成像与三维重建时存在一些局限性。如火焰在850/890nm波段的红外辐射强度仅为可见光的1/5-1/10,叠加光纤束传输损耗(单根光纤衰减0.3-0.7 dB/m),导致相机端信号强度<100 photons/pixel/ms。火焰湍流运动速度>10 m/s,要求曝光时间≤500 μs以消除拖影。因此,为了更好的观测红外弱光成像效果,使用更高红外灵敏度以及更低噪声的sCMOS相机能够完美解决改问题。相较于传统CMOS相机在红外波段量子效率(QE)仅10-20%,无法区分火焰核心区与边缘低温区的辐射差异。深视智能sCMOS相机在850nm左右有>50%量子效率曲线,以及18微米超大像元,即使在微秒级曝光下也能看清火焰边缘形态以及辐射灰度差异。


二、优势

1、850nm@50%以上量子效率,满足低辐照度的红外火焰探测

2、12bit成像,能够观测火焰形态分布以及精准识别边缘,提供识别精度;

3、超大像元。18μm像元,相较于6.5μm像元灵敏度提升约8倍。




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