playing with lenses
playing with lenses
After reading about some experiments with indigo and lenses, I decided to try something
they have absolutely no scientifical value, as the lenses are just made of resized spheres and are not accurate
the material of the lenses is glass (ior 1.5)
I put the camera inside a box with a hole
the hole is big enough so that you can't see the box
this is a render without any lens
let's call the lens' side near the camera "A" and the other one "B"
the first experiment is with a lens with concave A and convex B
as you can see there's almost no deformation
concave A and B:
convex A and B:
ok, I was expecting this
flat lens (a short glass cylinder )
now that's strange! I was expecting an image similar to the one without lens, but this is the most deformed one! And why is there just a small circle visible with all black around?
maybe it's just for some modeling flaws?
last experiment: all the lenses together, random order
mmm
ok, this thread is pretty useless...
Next time I'll try to do some renders with "real" lenses
they have absolutely no scientifical value, as the lenses are just made of resized spheres and are not accurate
the material of the lenses is glass (ior 1.5)
I put the camera inside a box with a hole
the hole is big enough so that you can't see the box
this is a render without any lens
let's call the lens' side near the camera "A" and the other one "B"
the first experiment is with a lens with concave A and convex B
as you can see there's almost no deformation
concave A and B:
convex A and B:
ok, I was expecting this
flat lens (a short glass cylinder )
now that's strange! I was expecting an image similar to the one without lens, but this is the most deformed one! And why is there just a small circle visible with all black around?
maybe it's just for some modeling flaws?
last experiment: all the lenses together, random order
mmm
ok, this thread is pretty useless...
Next time I'll try to do some renders with "real" lenses
Heh if you wanted to get real fancy you would replicate the lens of a nikon or canon with + 10 elements Also you would match the index of refraction to each species of glass used in the lens.
Anyone know if it's possible to replicate a multicoating on the psuedo lens?
Anyone know if it's possible to replicate a multicoating on the psuedo lens?
"To be, or not to be" That is a question?
I'm trying to recreate my fotocamera objective now... it's a bit hard, as I only have a drawing of the lenses
here's my first attempt:
very artistic
second one:
there's heavy deformation here
it seems like I achieved to recreate dof... the image is too small to tell however. I'll do a bigger render
edit: lensflare final version... it was a very slow render, like 8k mutations/sec
everyone loves (hates ) lensflare!
here's my first attempt:
very artistic
second one:
there's heavy deformation here
it seems like I achieved to recreate dof... the image is too small to tell however. I'll do a bigger render
edit: lensflare final version... it was a very slow render, like 8k mutations/sec
everyone loves (hates ) lensflare!
Just out of curiosity, wouldn't you need an orthographic projection? In real life the film is a flat area, but the camera in indigo is a perspective point. I seem to remember a few years ago someone made a lensed camera in povray using the orthographic projection to get real lensflares and such.
That last pic with the flare in it is the best. Keep going man.
dogfin -
That last pic with the flare in it is the best. Keep going man.
dogfin -
Tomorrow I will try and model a telescope, newtonian and then a simple refractor. I can also try some cat systems to see if it gives any nice effect. The trick will be putting that parabolic surface onto the mirror surface and then spinning it smooth. I have all the numbers, I'll just model it after my 12.5" mirror but don't know if it will give a magnified image or not.
"To be, or not to be" That is a question?
Great stuff Lego, very interesting experiments.
Any chance of some schematic wireframe renderings of your lens assemblies?
Love the lens flare render!
That's the first render I've ever seen with a properly simulated lens flare
If any of you guys have any information on how cameras are set up in terms of lens configurations, lens flare etc.. I'd like to see it.
About simulating non-reflective coatings on lenses, this could probably be done just by scaling down the reflectivity from that given by the Fresnel equations by some amount, perhaps just by a constant factor.
Any chance of some schematic wireframe renderings of your lens assemblies?
Love the lens flare render!
That's the first render I've ever seen with a properly simulated lens flare
If any of you guys have any information on how cameras are set up in terms of lens configurations, lens flare etc.. I'd like to see it.
About simulating non-reflective coatings on lenses, this could probably be done just by scaling down the reflectivity from that given by the Fresnel equations by some amount, perhaps just by a constant factor.
The camera in indigo has a non-zero sized aperture and a non-zero sized sensor, it's not modeled as a point.Just out of curiosity, wouldn't you need an orthographic projection? In real life the film is a flat area, but the camera in indigo is a perspective point
sure
this is the dof and lens flare setup
it's the objective of my camera... no measurements, I just copied the scheme from the istructions booklet
this is the telescope
the shape of the two lenses
all together to get the scale
on the top there's suzanne, on the bottom the camera and the small lens ("oculare". I don't know how to say it in english)
The telescope experiment went much better, as I tried to calculate the correct measures for the lenses and distances
this is the dof and lens flare setup
it's the objective of my camera... no measurements, I just copied the scheme from the istructions booklet
this is the telescope
the shape of the two lenses
all together to get the scale
on the top there's suzanne, on the bottom the camera and the small lens ("oculare". I don't know how to say it in english)
The telescope experiment went much better, as I tried to calculate the correct measures for the lenses and distances
In english we usually call them eyepieces.
The trick with the refractor is it's usually an doublet, two lens stuck together like a camera lens. The eyepiece however can be a simple 4 surfaced one or up to 15 surfaces just for that.
I'll try and gather some schematics of the lenses and telescope specs.
The trick with the refractor is it's usually an doublet, two lens stuck together like a camera lens. The eyepiece however can be a simple 4 surfaced one or up to 15 surfaces just for that.
I'll try and gather some schematics of the lenses and telescope specs.
"To be, or not to be" That is a question?
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