Does Leitz Lanthanide down convert as Panavision patent says -it was up convert ?

Discussion in 'Camera Building, Repairs & Modification' started by Mustafa Umut Sarac, Feb 13, 2017.

  1. Mustafa Umut Sarac

    Mustafa Umut Sarac Subscriber

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    question is above. I learned such a technology at panavision patent.

    ps. I WAS wrong , it says lanthanides down convert at patent paper , at the bottom , I added a paper for glass which up and down convert also.

    thank you,

    umut
     
    Last edited: Feb 13, 2017
  2. Halford

    Halford Subscriber

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    That would seem ... extremely unlikely.

    What makes a wavelength of light the wavelength / "colour" it is, is the amount of energy in each quantum of light energy. Infrared light is below the threshold of energy required to excite pigments in our eyes, and hence is invisible to us. Of course, other compounds can absorb it, hence the ability to make IR-sensitive films etc.

    Optical glass refracts light by changing the speed of light through the medium, which causes the refractive effect at boundaries between material of different optical density. Chromatic aberration is caused (and corrected) because different wavelengths are slowed down by different amounts in various optical media.

    Now what you are asking the glass to do, is to increase the amount of energy in each photon -- without changing its other properties (direction, basically). I cannot imagine how this might be done physically without violating the observed laws of quantum mechanics
     
  3. OP
    Mustafa Umut Sarac

    Mustafa Umut Sarac Subscriber

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    There are many google pages about above technology , they say invented at 1990 and uses nanoparticles in glass. There is also wiki page about upconversion. There is such a technology , not my fantasy. My main reason toı ask does leitz used that tech earlier.
     
  4. Halford

    Halford Subscriber

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    Oh up-conversion fluorescence is definitely a thing -- where a material absorbs, say, 2 infrared photons to emit one green one. But this would not be useful for making a lens, as the new photon would be emitted in a random direction. If you built these materials into a lens you'd just get a hazy, unsharp image.
     
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    Mustafa Umut Sarac

    Mustafa Umut Sarac Subscriber

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    I was wrong , patent talks about down conversion

    below is old post , be careful

    I read such a thing but I saw a discussion at panavion patent , they describe the tech as I asked first. And I read it upconversion gives out one green one red photon. My night time summitar shots have these colors and a vermillion hue and 3d faces. But I dont know.
     
    Last edited: Feb 13, 2017
  6. Halford

    Halford Subscriber

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    That would be very interesting. I have my doubts but just because I doubt it doesn't mean it's impossible :smile: It would be very interesting and exciting if that's the case.
     
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    Mustafa Umut Sarac

    Mustafa Umut Sarac Subscriber

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    I agree , last night I decided to buy a panavision lens cheap , its 45000 dollars or more !!! Than I learned that fellini satrycon movie shot by panavision lenses and they have high grade colors like star wars or summicron , I was thinking that lanthanide glass may be intensify the colors , reading google , I found panavision mobile camera patent describes lanthanides as converting light to light.
     
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    Mustafa Umut Sarac

    Mustafa Umut Sarac Subscriber

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    https://vtechworks.lib.vt.edu/bitstream/handle/10919/48181/1556-276X-9-231.xml?sequence=1


    his paper introduces a new synthesis procedure to form erbium-doped ceria nanoparticles (EDC NPs) that can act as an optical medium for both up-conversion and down-conversion in the same time. This synthesis process results qualitatively in a high concentration of Ce
    <sup>3+</sup>
    ions required to obtain high fluorescence efficiency in the down-conversion process. Simultaneously, the synthesized nanoparticles contain the molecular energy levels of erbium that are required for up-conversion. Therefore, the synthesized EDC NPs can emit visible light when excited with either UV or IR photons. This opens new opportunities for applications where emission of light
    <
     
  9. Nodda Duma

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    The doping and preparation process necessary for lanthanides to do what you're reading about is incompatible with preparation for making LaK family of optical design glass.
     
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    Mustafa Umut Sarac

    Mustafa Umut Sarac Subscriber

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    Thank you Jason , panavision patent talks about lanthanides and down conversion , do you know anything about it for LaK ?
     
  11. Nodda Duma

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    Yes...there is none. The physical structures (carefully grown Lanthanide nanostructure vs. Lanthanum-doped silicate polycrystalline mixed in a big vat) are entirely different.

    Steel is used both for making automobiles and pocket knives, but you can't exactly put a Volvo in your pocket.