Optics

Show what you're working on, get feedback and help
Chris
Posts: 4924
Joined: Sun Mar 08, 2009 3:00 am
OS: Win10
SketchUp: 2016

Optics

Post by Chris » Thu Oct 01, 2009 8:01 pm

I was playing around the other night with optics too. The prisms both use the diamond library material and the mirrors are architectural glass, perfect mirror.

The render sucks, overall, because I didn't put any actual effort into it, but I though the effects were cool.

DOWNLOAD SCENE FOR TWILIGHT RENDER V2 HERE:
Attachments
optics.png
optics.png (309.96 KiB) Viewed 5158 times

Ecuadorian
Posts: 1779
Joined: Fri Mar 20, 2009 3:43 pm
OS: Windows 7 Pro 64-bit
SketchUp: 7.1
Location: Guayaquil, Ecuador
Contact:

Re: Optics

Post by Ecuadorian » Thu Oct 01, 2009 8:36 pm

I gave up trying to achieve that effect. Care to share the render settings and how you made the light beam?

rbissett
Posts: 17
Joined: Fri Sep 25, 2009 12:04 am

Re: Optics

Post by rbissett » Thu Oct 01, 2009 8:59 pm

Very cool Chris! That was my next idea...use a laser beam. How'd you do that?
Bob Bissett

shura
Posts: 130
Joined: Fri Sep 04, 2009 6:49 pm
OS: Windows 7
SketchUp: Pro 7.1
Location: D - Berlin

Re: Optics

Post by shura » Thu Oct 01, 2009 9:13 pm

Over here no results as well...

hum, I have a projector light with a width of 5, light strength of 600 (!), bulb size of 1 and colour white (of course) --- the beam enters the prism, gets fractionized but does not leave the prism at all. Do I have to do something to the backface of the SU material?
Am I right assuming that cast shadows and soft shadows doesn't matter in progressive, does it?

Chris
Posts: 4924
Joined: Sun Mar 08, 2009 3:00 am
OS: Win10
SketchUp: 2016

Re: Optics

Post by Chris » Thu Oct 01, 2009 9:56 pm

Here is the scene.

To answer your questions, 'Cast Shadows' is ignored but soft shadows does matter. I have it turned off for the light in this scene.
The trick to creating the light beam is actually to shine it through a narrow slit in the wall (lower left in the image). This creates the "linear" light projection. I used a very intense spotlight, strength = 1000. Also note that the light is tilted downward slightly. This ensures that it leaves a trail of light along the ground.

What I really like about this scene is that you get not just the refraction in the prism, but a primary and secondary reflection.
Attachments
prism.skp
(39.66 KiB) Downloaded 231 times

Gaieus
Posts: 426
Joined: Thu Aug 27, 2009 9:08 am
OS: Win XP + SP3
SketchUp: 6 7 8
Location: Pécs, Hungary
Contact:

Re: Optics

Post by Gaieus » Thu Oct 01, 2009 11:27 pm

OK guys, next thing is to build a spectrometer.
:roll:
Gai...

rbissett
Posts: 17
Joined: Fri Sep 25, 2009 12:04 am

Re: Optics

Post by rbissett » Fri Oct 02, 2009 12:03 am

Gaieus wrote:OK guys, next thing is to build a spectrometer.
:roll:
Psychic! I'm working on one now. I made a real one in high school with a diffraction grating. Trying to model a DG crashed SU. Shoulda used a Component. Now trying a prism type. No idea how to model the lenses vs. focal lenth, etc.
Bob Bissett

Fletch
Posts: 10441
Joined: Fri Mar 20, 2009 2:41 pm
OS: PC 64bit
SketchUp: 7-2018
Contact:

Re: Optics

Post by Fletch » Fri Oct 02, 2009 12:45 am

I want a Twilight Telescope or Microscope... hope you can build us one :?
This site may help?

Getting a perfect lens built in SketchUp should be a fascinating challenge. :ugeek:

This guy managed something pretty good.

notareal
Posts: 540
Joined: Sat Mar 21, 2009 1:23 pm
Contact:

Re: Optics

Post by notareal » Fri Oct 02, 2009 7:42 am

With a telescope or a microscope, I think modelling accurate enough lenses or parabolic mirrors is the main problem. Second problem might be caustics, if they are needed to see trough dielectric material and you have to use unbiased rendering. So as long as you are projecting the image from the telescope or the microscope, you should be able to do this.

shura
Posts: 130
Joined: Fri Sep 04, 2009 6:49 pm
OS: Windows 7
SketchUp: Pro 7.1
Location: D - Berlin

Re: Optics

Post by shura » Fri Oct 02, 2009 7:45 am

Thanks for the skippy Chris! I'll give it a spin tonight... cheers alex

Post Reply

Who is online

Users browsing this forum: tuna57 and 6 guests