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Optics Equation

  1. Apr 6, 2009 #1
    I keep seeing this equation pop up and I have no idea what it is or where it comes from.

    [tex]n_{1}f_{1}= -n_{2}f_{2}[/tex]

    It looks like a take on snell's law, but what assumptions have to be made to get to this equation from snell's?
    Last edited: Apr 6, 2009
  2. jcsd
  3. Apr 6, 2009 #2
    The formula is related to an optical aberration called field curvature. See attachment.

    Attached Files:

    Last edited: Apr 6, 2009
  4. Apr 6, 2009 #3
    Thank you.
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