Thumb-sized MOEMS mini-spectrometer targets visible light spectrometry
The 9-gram device features 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 75×750 µm slit is formed into the CMOS chip using MEMS technology. The distance between the sensor and slit is only 1mm, whilst the grating to image sensor distance a mere 8.5mm. Through the use of these novel techniques, the C10988MA-01 can offer a spectral resolution of 14nm in the wavelength range of 340 to 750nm, making it suitable for a range of visible light applications requiring a miniaturised spectrometer head. To aid initial evaluation Hamamatsu offer a dedicated driver board, the C11351, with USB 2.0 connectivity and 16 bit A/D resolution.
Visit Hamamatsu Photonics at www.hamamatsu.com
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