强力激光成防御小行星有利武器

Arcoptix公司推出的基于偏振光学的具有光子级别高灵敏度的微型光谱仪，其灵敏度比常用的光栅式光谱仪高出100倍。探测器灵敏度可达15光子/count, 噪声可低至0.02count.此种设计特别适用于低光照光谱的研究。包括混浊液的光谱测试，漫反射光谱测试，荧光光谱测试。The ARCspectro HT-2D is an ultra compact stationary Fourier transform spectrometer. Based on polarization optics it provides an extremely high sensitivity and is ideal for measurements of low light and diffusing sources （diffuse reflection and turbid media）. Its unique design permits to collect light over a large angles and it has an high entrance surface of several millimeters. The operation principle prevents from problems like drift or dark noise which allows high contrasts at single shot measurements. Thanks to its 2D camera it averages over 1000 measurements in one shot! It can be used in extremely simple optical setups, no need for focusing optics. The user can directly illuminate the entrance opening with the light to be spectrally analyzed or can bring the light to the system with fiber bundles. 

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