Re: wavefront error at air/glass surface


Michael Koch wrote:


In the meantime I've answered the question myself. The formula must be valid
for all angles of incidence.
One could construct a prism with perfectly flat surfaces where the wavefront
enters the glass under 45 degrees angle of incidence, and exits the glass
under 0 degrees angle of incidence. If the formula was not valid for all
angles, the wavefront error would be different before and after passing the
prism. The wavefront error would be either decreased or increased. That's
impossible. A prism which decreases the wavefront error would be nice to
have :-)

Michael

What you state is correct only for a plane wavefront.

Please visit my web site at www.richardfisher.com

.

Relevant Pages