Ultra-compact grating type spectrometer with high NIR sensitivity

27 May 2022

About the size of a small coin, this tiny grating-based spectrometer is ideal for pocket (consumer) spectrometers and handheld instruments. It has a spectral response range of 640-1050 nm and resolution of 17-20 nm (depending on the wavelength). Its input slit is 15 x 300 µm, and incoming light is dispersed by a nano-imprinted reflective grating, and imaged onto a custom CMOS active pixel sensor (APS). 

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