The High Throughput Virtual Slit enables higher spectral resolution than is achievable with conventional spectrometers by manipulating the beam profile in pupil space. By reshaping the instrument pupil with reflective optics, HTVS-equipped instruments create a tall, narrow image profile at the exit focal plane, typically delivering 5X or better the spectral resolution achievable with a conventional design.
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Edward A. Gooding, Thomas Gunn, Andrew T. Cenko, Arsen R. Hajian, "High resolution hyperspectral imaging with a high throughput virtual slit," Proc. SPIE 9860, Hyperspectral Imaging Sensors: Innovative Applications and Sensor Standards 2016, 98600C (10 May 2016);