Nice. It would be interesting to see with one half of the target reflector being slightly more curved. That would give an asymmetrical reflection pattern.
This one was super cool. Can you give it some permeability, like a low % for the front and back wall of the lenses going both ways, so I can see where the stuff that makes it all the way through lands?
There are strange reflections off the "walls" which shouldn't exist. I imagine this is having to setup some type of boundary conditions in the solver? Can you not setup free boundary conditions then?
There is no simple way to get "free" boundary conditions. What I'm using here is a form of absorbing, or perfectly matched layer, boundary conditions. They are not quite perfect, and the reflections are made more visible by the used lighting.
In my biophotonics course they taught us that an effective way with which they managed to reduce the effect of the boundary conditions is by creating a diffuse boundary region with increasing absorption(a gradient of absorbance over 10-20 "pixels") , and also by computing for a slightly larger area and then recording values only for a smaller region inside ( takes longer but the effect has time to spread out and not be as evident) (maybe there is some publication by my professor regarding this method.. his name is Alwin Kienle ) hope it helps :)
I just started learning about differential geometry; so glad smarter people than me have figured this stuff out, super fun to play with! (Sorry for jargon salad: In differential geometry the wavefront (2nd part of video) is roughly speaking the immersion of the orthotomic of the surface and the point light source along its evolute first derivative (then successively apply each next optical element on the resulting parametric envelope. If you know of a simpler way, please comment)
This is also known as the Huygens-Fresnel principle. Each point in a wavefront acts as the source for the wavefront at a later time, and it is the interference of these elementary waves that builds the evolving front.
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Love myself some classic parabolic reflectors in high resolution! Immediately brightens my day
Nice. It would be interesting to see with one half of the target reflector being slightly more curved. That would give an asymmetrical reflection pattern.
Whish to see with emitter/receiver part being simulated too
One of your best
This one was super cool. Can you give it some permeability, like a low % for the front and back wall of the lenses going both ways, so I can see where the stuff that makes it all the way through lands?
Yooooo it's the HD remake
2:21 That is so beautiful....................
I love the patterns
There are strange reflections off the "walls" which shouldn't exist. I imagine this is having to setup some type of boundary conditions in the solver? Can you not setup free boundary conditions then?
Maybe it’s the impedance mismatch between the pixels at the edge of your screen and free space?
There is no simple way to get "free" boundary conditions. What I'm using here is a form of absorbing, or perfectly matched layer, boundary conditions. They are not quite perfect, and the reflections are made more visible by the used lighting.
In my biophotonics course they taught us that an effective way with which they managed to reduce the effect of the boundary conditions is by creating a diffuse boundary region with increasing absorption(a gradient of absorbance over 10-20 "pixels") , and also by computing for a slightly larger area and then recording values only for a smaller region inside ( takes longer but the effect has time to spread out and not be as evident) (maybe there is some publication by my professor regarding this method.. his name is Alwin Kienle ) hope it helps :)
I just started learning about differential geometry; so glad smarter people than me have figured this stuff out, super fun to play with!
(Sorry for jargon salad: In differential geometry the wavefront (2nd part of video) is roughly speaking the immersion of the orthotomic of the surface and the point light source along its evolute first derivative (then successively apply each next optical element on the resulting parametric envelope. If you know of a simpler way, please comment)
This is also known as the Huygens-Fresnel principle. Each point in a wavefront acts as the source for the wavefront at a later time, and it is the interference of these elementary waves that builds the evolving front.
Niel : HIGH RESOLUTION
My Phone : 220p take it or leave it