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  1. yup

    Wavelength shifting in the visible spectrum

    Could a frequency-doubling crystal be used?
  2. yup

    Wavelength shifting in the visible spectrum

    I guess I've a lot to learn about optics... wish I'd started earlier, since it's a very appealing field. Thanks again for your replies!
  3. yup

    Wavelength shifting in the visible spectrum

    Thanks for your response. Lower spectral power and intensity would be ok, as long as the power in one desired band can be increased at the expense of other bands. I'm trying to increase the efficiency of a color video projection system which uses a white (metal halide) light source. This...
  4. yup

    Wavelength shifting in the visible spectrum

    What sorts of optical devices can be used to efficiently alter the wavelength of visible / near-visible light? I've looked a little bit at dye-sub lasers and electroluminescence, but neither seems particularly efficient. I'm looking for a device or technique that can spread a ray of, say...
  5. yup

    saddle for a vessel

    Length between tangents / 5 is the best for layout purposes. If the zick analysis confirms the stresses in the shell are too high move them out towards the ends to a min dimension of diameter / 4 and redo the analysis. The position of the nozzles in the bottom of the shell also has a bearing on...

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