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lenses and wavelengths that accompany them...

Discussion in 'General Electronics Discussion' started by ajetrumpet, May 14, 2013.

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  1. ajetrumpet

    ajetrumpet

    1
    0
    May 14, 2013
    hello all,

    this is my first question here. I do not do this kind of work but I am a software developer. What I'm interested in, per the title, are the wavelengths associated with camera lenses. I know there are different types of lenses and the wavelengths associated with each in terms of how they operate are probably all different. Here's my issue:

    => What I'm trying to do is use a camera that uses any wavelength to capture its light but then be able to manipulate the light that it captures in such a way as if it were like the camera took a picture of a greenscreen (or any screen of one color only).

    So the question would be: How would I do such a thing? Or better yet, where would I start? I'm thinking that there is a connection between the wavelength that's associated with the camera lens and how that translates to "color", as it's captured from the environment that the lens is pointed at.

    Can someone help me with this? thanks!
     
  2. davenn

    davenn Moderator

    13,837
    1,952
    Sep 5, 2009
    Hi
    welcome to electronics point :)

    this is an optical physics rather than an electronics question
    I think you have a few basic misunderstanding about optics

    .

    no there isnt really ;)

    A normal lens lets all light from infra red through the visible spectrum to ultraviolet through it ( when just talking about light ... in reality it will let virtually the whole
    electromagnetic spectrum through it from low frequency radio signals way up to X rays and beyond)

    The lens is just a lump of glass, its only special property is that it has been shaped to focus light.

    You need to use a green filter to allow say only green light through or say a red filter
    for only red light

    Dave
     
    Last edited: May 14, 2013
  3. davenn

    davenn Moderator

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    Sep 5, 2009
    PS.... you do know you can manipulate a camera image in software say like photoshop ?

    you can take a pic in normal colour and then filter it to your heart's content in software

    Dave
     
  4. sirch

    sirch

    109
    1
    Dec 6, 2012
    If you are a software developer then pulling a specific colour out of a JPG or RAW file from the camera should not be too much of a challenge.

    Just as an after-thought, when you say "lens" do you mean CCD (i.e. the sensor in a digital camera) as opposed to the chunk of glass that focuses the image?
     
  5. davenn

    davenn Moderator

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    1,952
    Sep 5, 2009
    I guess we will find out if/when he responds ;)

    Dave
     
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