Photodiodes

Discussion in 'The Projects Forum' started by shakilabanu, Aug 5, 2014.

  1. shakilabanu

    Thread Starter Member

    Jul 8, 2014
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    I am working on a project that requires me to reverse engineer a BioPhotometer and build a new one with modifications. The part where I am stuck is a photodiode that measures wavelengths between 230nm to 600nm.

    I know fundamentals of photodiodes, but I was not sure is a single photodiode can measure this range of wavelengths. ?

    Or are there special photodiodes (array) that have multiple photodiodes built into them which measure different wavelengths and hence combine to make a broad spectrum photodiode equivalent. ?

    Hope I have made this clear.
     
  2. MrChips

    Moderator

    Oct 2, 2009
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    Photodiodes will respond to a range of wavelengths.
     
  3. shakilabanu

    Thread Starter Member

    Jul 8, 2014
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    Can you mention some photodiode that might be able to sense the range of wavelengths that I have mentioned.

    Link or part number? I have seen a few and none of them had the range that I am looking for. That is what lead me to beleive that may be there is a possibility of many photo diodes packaged as a single one? Possible?
     
  4. MrChips

    Moderator

    Oct 2, 2009
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    Google UV photodiodes.
     
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  5. bertus

    Administrator

    Apr 5, 2008
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  6. Dodgydave

    Distinguished Member

    Jun 22, 2012
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    Try a BPW21r for starters...
     
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  7. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
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    Try Hamamatsu or Advanced Photonix
    They have some off the wall stuff.

    I've been meaning to get back to a project I started back in 2010 doing a PAR sensor for 400-700nm and was looking at their stuff back then
     
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  8. shakilabanu

    Thread Starter Member

    Jul 8, 2014
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    That was my starting point too, but my requirement requires something more wideband.
     
  9. shakilabanu

    Thread Starter Member

    Jul 8, 2014
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