Danny, knowing the dimensions for the lens (they are written on the tester side of the lens frame), how do you calculate how far apart the tester and the lens should be and how far apart the lens to the mirror should be?I am working on a twelve inch F7 mirror if that helps.This is a great tutorial/explanation of how to work with the lens and understand what is seen.
Chathuranga Hettiarachchi I’m testing a parabolic mirror for correction, how well it’s figured. I’m shining a led thru a ronchi grating that shoots thru a Plano convex lens - off the mirror and back thru the lens then grating. The Plano convex lens will make a parabolic wavefront look spherical, meaning the lines will look straight when the figure of the mirror is good.
Danny, knowing the dimensions for the lens (they are written on the tester side of the lens frame), how do you calculate how far apart the tester and the lens should be and how far apart the lens to the mirror should be?I am working on a twelve inch F7 mirror if that helps.This is a great tutorial/explanation of how to work with the lens and understand what is seen.
download ceravola's program or dm me with an email I'll send over a zip file.
Don't understand. :'( Can you elaborate a bit about what you are doing, what are the parts etc, beforehand? Keep it up!!. Thank You
Chathuranga Hettiarachchi I’m testing a parabolic mirror for correction, how well it’s figured. I’m shining a led thru a ronchi grating that shoots thru a Plano convex lens - off the mirror and back thru the lens then grating.
The Plano convex lens will make a parabolic wavefront look spherical, meaning the lines will look straight when the figure of the mirror is good.
@@Pinbout I see. Thanks for the explanation sir.