DIY High resolution spectrometer

In summary, a DIY high-resolution spectrometer is a cost-effective device that allows users to analyze the spectrum of light. It typically involves using a diffraction grating, a light source, and a detector, such as a camera or photodiode, to capture and measure light wavelengths. By assembling these components, hobbyists and scientists can create a functional spectrometer for various applications, including studying the properties of light, analyzing materials, and conducting experiments in educational settings. The project emphasizes hands-on learning and accessibility in scientific experimentation.
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Help in modify a BW tek BTC100-2s spectrometer to improve its resolution while decreasing the spectral range.
Hello All,

I recently purchased a BW Tek BTC100-2s spectrometer from eBay. It has fairly good specifications, but I have been wondering if there is an inexpensive way to improve its resolution. The spectrometer uses a Czerny-Turner configuration. My plan was to place a slit at the focal length where the detector (F) would be, then expand that narrow section of the spectrum to fill the detector. However, I have been struggling with how to efficiently expand and focus the light after the slit onto the detector. Here are some of the specs for the spectrometer:

  • Spectral range: 400-640nm
  • Slit size: 50µm
  • Grating: 1800 lines/mm, blazed at 500nm
  • Detector: Sony ILX511 2048 Pixel CCD
  • Pixel spacing: 14µm
  • Pixel size: 200µm
Any advice or suggestions would be greatly appreciated.

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  • #2
Maybe use a different grating? One with a wider dispersion.

Or replace mirror "E" with one of different curvature (or even flat?). This would spread out the spectrum that falls on the detector.
 
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