DYI spectrometer

Here is my attempt to make a cheap DIY spectrometer. Using a usb camera and a jewelry spectroscope. The white line on the right should not be there. I think there is a slit between the grating plate and the housing of the spectroscope. It is a cheap scope.
I bought it here.
usb_spectroscope_small CG bulb spectra CFL_bulb LCD screen spectra monitor Outside light spectra outside_light

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Spectrometer

I always had an idea to make a digital spectro meter for leave analysis by attching a linear cmos sensor to a jewelry spectormeter.
But now a copany made everything in one chip.
http://www.hamamatsu.com/us/en/C12666MA.html
Spectormeter

Could not find the price for this chip yet.
Will keep an eye on it.