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Mirror Gain

  1. Aug 12, 2004 #1
    Hi,

    I've asked someone to make me a parabolic mirror for a robot and they want to know the 'mirror gain' i would like. Does anybody know what 'mirror gain' is?

    thanks
     
  2. jcsd
  3. Aug 12, 2004 #2

    brewnog

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    If the mirror is pointing straight back at the light source, the light will be "concentrated" if you will, onto a smaller projected area, but with a greater intensity, directly back in the direction it came. Think of the bright flash you get instantaneously from a lighthouse or fire engine warning light. The gain is just the ratio of the two intensities. (Although, depending on how you want to express the gain, it may be a log of this ratio).
     
    Last edited: Aug 12, 2004
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