11–20 of 34 posts
Anyone know of active DIY higher-er resolution spectrometer projects using image sensors? Is it possible to create a sharp image of 940-1240nm 3000 pixels across with less then $3000 in parts? I want to learn how to make a broader(uv to ir) but crappy-er version of this: https://solarsystem.nasa.gov/resources/390/the-solar-spectru...
Anyone know of active DIY higher-er resolution spectrometer projects using image sensors? Is it possible to create a sharp image of 940-1240nm 3000 pixels across with less then $3000 in parts? I want to learn how to make a broader(uv to ir) but crappy-er version of this: https://solarsystem.nasa.gov/resources/390/the-solar-spectru...
Off the shelf you're looking at around $8k for a spectrometer from Ocean Optics. Just point the fibre at sun on a white PTFE plate outside (teflon has pretty uniform reflectivity) and it should work. You generally need an InGaAs sensor to go beyond 1000 nm with any appreciable sensitivity. Silicon is still sensitive to around 1200, but performance drops significantly. The solar image from NASA is only in the visible anyway, but as I mentioned in another post the simplest way to do this is to use a high lines per mm grating (e.g. 1200) and rotate it so you capture multiple spectra in shorter ranges.
[0] http://www.astrosurf.com/buil/spectrographs.html
[1] https://www.oceaninsight.com/products/spectrometers/general-...
Anyone know of active DIY higher-er resolution spectrometer projects using image sensors? Is it possible to create a sharp image of 940-1240nm 3000 pixels across with less then $3000 in parts? I want to learn how to make a broader(uv to ir) but crappy-er version of this: https://solarsystem.nasa.gov/resources/390/the-solar-spectru...
Anyone know of active DIY higher-er resolution spectrometer projects using image sensors? Is it possible to create a sharp image of 940-1240nm 3000 pixels across with less then $3000 in parts? I want to learn how to make a broader(uv to ir) but crappy-er version of this: https://solarsystem.nasa.gov/resources/390/the-solar-spectru...
We’d stick a standard CCD (like in any DSLR) behind them, and voila! You have a spectrometer! This would also give you a good optical path, for focusing light.
You’d still need to calibrate the driver, but that’s just paperwork.
Anyone know of active DIY higher-er resolution spectrometer projects using image sensors? Is it possible to create a sharp image of 940-1240nm 3000 pixels across with less then $3000 in parts? I want to learn how to make a broader(uv to ir) but crappy-er version of this: https://solarsystem.nasa.gov/resources/390/the-solar-spectru...
A lower resolution but easier-to-construct variant: http://scheeline.scs.illinois.edu/~asweb/CPS/