Re: Fiber Core Imaging

On 30 May 2007 22:43:16 -0700, Farsang <youzpalang@xxxxxxxxxxxx>
wrote:



Hi:

Can a fiber core be imaged down by a factor of 10, the idea is to
make a large core ( 100 um) appear as close as to a point source.

I thought I could make reverse beam expander (1/10 reduction) using
two aspheres and image the fiber core (located at focal point of the
first lens). I couldn't find comerical lenses that could do this,
because of the fiber NA (~0.2) the first lens dia. is large
(depending on the selected focal length) and the second lens dia.
because of its shorter focal length is small not being able to collect
light coming out of the first lens.

Is there a way to do this?


Second law of thermodynamics: the energy density of an image can't be
higher than for the source.

So you can make the image smaller, but not with higher energy density.
It costs energy.

This is how it was put by the classics.

best regards

John
.