Recent content by tedfine
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SPD curves for standard light sources
Yes, that's a reasonable approach, but requires the student to capture a star's spectrum, which is surprisingly difficult, involving finding the star in the sky, pointing the camera at it, keeping the camera on the star as the sky moves but keeping the star on the same pixels for 3 to 30 seconds...- tedfine
- Post #9
- Forum: General Light Discussion
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SPD curves for standard light sources
This is a project using a DSLR with an objective grating: https://www.fieldtestedsystems.com/starspectra/. It's a slit-less spectrometer originally designed for astronomy. However, it can be used on any compact light source, which means street lights at a distance (with dark surroundings)...- tedfine
- Post #7
- Forum: General Light Discussion
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SPD curves for standard light sources
Maukka: THANKS so much. GREAT data. Double thanks for the data points, which saves me from having to digitize it myself. Where did you get the from? Do you know of on-line sources of this kind of information for other light sources? ssanasisredna: Thanks for the suggestions. Seems like...- tedfine
- Post #4
- Forum: General Light Discussion
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SPD curves for standard light sources
I'm looking for suggestions for commonly available (like from Home Depot) and inexpensive lamps that can be used as a standard calibration source for an inexpensive, low resolution, slit-less spectrometer. Ideally the lamp would be small (like an LED) and easy to wire up to a 9 volt battery...- tedfine
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- Replies: 8
- Forum: General Light Discussion
