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I What is the max magnification of 0.5mm film lens.

  1. Jul 17, 2017 #1
    What is the max magnification of 0.5mm film lens.

    Film is just on the top of flat object(Paper, Display, Picture, etc).
    If Fresnel lens is made on top of the film, Can I magnify the object?

    Thank you.
  2. jcsd
  3. Jul 17, 2017 #2


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    The way a 'film' lens depends on the radius of curvature of the lens from which it was developed so you cannot have a definitive answer to your question. See this link. which shows how a spherical lens can be substituted with a stepped (thin) lens.
    There is a reference to fresnel page magnifiers in this link. and the magnification formula is there.
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