1. Broadband astigmatism-corrected 
Czerny–Turner spectrometer

    Broadband astigmatism-corrected 
Czerny–Turner spectrometer
    e report an optical design for a low-cost optics, broadband, astigmatism-corrected practical spectrometer. An off-the-shelf cylindrical lens is used to remove astigmatism over the full bandwidth. Results show that better than 0.1 nm spectral resolution and more than 50% throughput were achieved over a bandwidth of 400 nm centered at 800 nm.
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