New Thumb-Sized MOEMS Mini-Spectrometer for Visible Light Spectrometry Jul 17, 2009

Developed for use in portable and hand-held devices, where a standard mini-spectrometer would be too large and consume too much power. Not only small, but the C10988MA is also light, weighing only 9 grams.The new device uses an aberration-corrected concave grating with a very short focal length, and a blazed grating profile for high diffraction efficiency. The grating is replicated onto the top of a convex glass lens using nano-print technology. Directly opposite the grating is placed a dedicated CMOS silicon image sensor with an on-chip slit. This 75 µm x 750 µm slit is formed into the CMOS chip using MEMS technology. The distance between the sensor and slit is only 1 mm, whilst the grating to image sensor distance a mere 8.5 mm.

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