Table 1.

Comparison of the miniature spectrometers QE65 Pro and customized Ventana VIS-NIR.

Specifications	QE65 Pro	Customized Ventana
Light throughput	$F/4$	$F/2$
Bandwidth	353 nm (700 to 1053 nm)	677 nm (430 to 1100 nm)
Spectral resolution	3.5 nm	4 nm
CCD peak quantum efficiency	95%	75%
CCD pixel size	$24.6\mu {\mathrm{m}}^2$	$14\mu {\mathrm{m}}^2$
CCD pixels	$1024\times 58$	$1024\times 64$
CCD active area	$24.576\times 1.392$${\mathrm{mm}}^2$	$14.336\times 0.896$${\mathrm{mm}}^2$
CCD temperature	$-15°\mathrm{C}$ (40°C below ambient)	15°C (10°C below ambient)
Dark noise (single spectrum)	3 counts RMS	6 counts RMS
SNR	1000:1	500:1