A low cost compact CCD grating spectrometer

The authors describe a grating spectrometer consisting of a slit, a transmission holographic grating, a lens, and a CCD (charge coupled device) camera. A frame grabber equipped in a computer digitizes the NTSC signal from the CCD camera. The system is relatively small (12.7 cm*17.8 cm*30.5 cm) and light-weight (5.4 kg). The system will measure the lumen output of modern fluorescent or compact fluorescent lamps more accurately than conventional filter-based photometers.<
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