Stephan Bourgeois wrote:
> The optical section was a replica of cardboard spectroscopes available > for schools. > * card 0.5 mm slit > * holographic diffraction grating 1000 lines/mm > * acrylic collimating lens +9.4 dioptr. 106mm diam. > * baffles made of foamboard coated with black card > lens and diffraction grating are available from www.astrodienst.de
Not any more. That site seems to only contain Horoscope's now!
> Sensor > * Philips Toucam Pro II webcam with standard lens. This webcam uses a > Sony HAD 640x480 colour CCD > * linux drivers and control (setpwc, dov4l) > Camera settings: 5fps open shutter, no noise reduction, no compression, > sharpness 0, gamma 2.2, gain 12000 (0..65535)
Most instruments use a linear CCD or CMOS sensor, something like this: <http://www.eureca.de/pdf/optoelectronic/toshiba/TCD1304AP.pdf>
> If anybody is interested, please let me know. I dropped the project > because I felt very much on my own. In any case I hope you enjoyed > reading about this! > Stephan.
Interesting project.
Looking around, I guess that a lot of the bits for even a reasonably advanced instrument are out there (e.g. Edmund Optics have an extensive array of diffraction gratings), but knowing how to put it all together is something else.
Graeme Gill.