Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.
Modeling lens in COMSOL 5.0
Posted 14.11.2014, 11:12 GMT-5 Ray Optics 1 Reply
Please login with a confirmed email address before reporting spam
Dear Everyone,
I am using the Ray Optics Module, the new feature of COMSOL 5.0 in my simulations. I am modeling an aspheric lens. The setup is very simple: I have a lens from Thorlabs and I know all geometric data of the lens and the index of refraction of the material. I created the lens profile according to the aspheric lens equation coefficients provided by Thorlabs. Still, I have problems with the results. The lens should have a diffraction limited focal point size but I get a very blurred focal point instead. Light rays arriving farther from the optical axis meet closer behind the lens than rays arriving closer to the axis and this causes a 'radius-dependent' focal length.
My question is that how is this possible? I think I set all parameters correctly and the lens should work properly but it does not. What is the problem? Did I overlook something in COMSOL simulation settings? Or maybe the calculations are not precise enough?
Thank you,
Daniel
I am using the Ray Optics Module, the new feature of COMSOL 5.0 in my simulations. I am modeling an aspheric lens. The setup is very simple: I have a lens from Thorlabs and I know all geometric data of the lens and the index of refraction of the material. I created the lens profile according to the aspheric lens equation coefficients provided by Thorlabs. Still, I have problems with the results. The lens should have a diffraction limited focal point size but I get a very blurred focal point instead. Light rays arriving farther from the optical axis meet closer behind the lens than rays arriving closer to the axis and this causes a 'radius-dependent' focal length.
My question is that how is this possible? I think I set all parameters correctly and the lens should work properly but it does not. What is the problem? Did I overlook something in COMSOL simulation settings? Or maybe the calculations are not precise enough?
Thank you,
Daniel
1 Reply Last Post 14.11.2014, 17:39 GMT-5
Please login with a confirmed email address before reporting spam
Posted:
1 decade ago
Hi Daniel,
Could you please attach a copy of the model that's giving you unexpected results?
Best Regards,
Chris Boucher
Could you please attach a copy of the model that's giving you unexpected results?
Best Regards,
Chris Boucher