OptiCore + LuxCore Lens System Tutorial

This is a first tutorial to show how to set up a working lens system model in Blender, based on a triplet lens design.
Rendered using Blender and LuxCoreRender
www.blender.org/
luxcorerender.org/
The lens model is taken from the free Qioptiq Lens Library
www.qioptiq-shop.com/en/Optics...
.blend-file used to create this video:
drive.google.com/file/d/1B-Ji...
#Blender #LuxCoreRender #OptiCore #WinLens #Optics #Raytracing

[@phonkstalker498]

Thank you very much. I'm going to make a realistic scope lenses, so your video helped much

[@helloansuman]

Nice. Waiting for more videos

[@vagatronics]

ty

[@-alex-4431]

Sehr hilfreich 👍

[@JoshuaMKerr]

Also are there any other places where you can find lens files like the ones in the library? Sorry to bombard, but your video is literally the only useful one I can find on this subject.

[@howtoprint6002]

There are places you can find lens design files, e.g. www.lens-designs.com/ is one I know of. However these are not Blender files but e.g. Zemax files, so you will have to implement them yourself. Please also observe that the rendering engines for Blender are limited in regards to cemented lenses or correct chromatic aberrations of the glass materials, so you may find that complex lenses don't work well.

[@haleynghweeping5895]

Thanks for the helpful tutorial. May I ask if I want to use this as to render an object (e.g. monkey head) instead of a HDRI, how do I go about doing it?

[@boutignylaurent9124]

Really cool tutorial ! I've been looking for something like this for a while now, thank you ! Would be willing to share your blender project as example ? I followed your instructions but got slighlty different result (not sure why)

[@howtoprint6002]

Hi, I added a link to the blend-file in the video description.

[@x_jaydn]

Super informative! I'm subbing in hopes that you'll follow up with more content in the future! 😎
Are you employed as a lens engineer or something? 🤔 You're incredibly knowledgeable

[@howtoprint6002]

Thanks for the sub :) I've finally have some more time again so I started to prepare for new content ;)
I'm not a lens engineer, but working in the field of optics.

[@x_jaydn]

@@howtoprint6002 Looking forward to it!~ It would be cool to know the journey of how you got there as well. I'm currently at a point in life where I'm wondering if I should go back to school for a second undergraduate degree, but, instead of in Biomedical Science, this time in Engineering 🤔

[@gopalshah]

Hi, now that I'm up and running I am trying the tutorial -- what is the reason to add interior and world volumes vs just using the IOR of the glass material? Is IOR of the glass material only for the surface of the material? But interior volume takes into account the glass 'inside' the lens? What about world volume then? Air? Thanks!

[@AstradTheCynic]

This was amazing! Are you still going to publish other parts?

[@krewcrosby3289]

I realize it is quite randomly asking but do anyone know of a good place to watch new tv shows online ?

[@aydinhudson2280]

@Krew Crosby Flixportal :)

[@krewcrosby3289]

@Aydin Hudson Thanks, I signed up and it seems to work =) I appreciate it!!

[@aydinhudson2280]

@Krew Crosby Happy to help xD

[@Adeloye1000]

Hi, kind of an emergency but how did you add the Optque lenses to the mesh library for use here? Really stuck on that step

[@letskirschjoghurt7359]

Hi.
You are talking about how to install an addon in Blender? See e.g. this tutorial:
twominutetuts.com/tutorial/installing-add-ons/
The zip file with the addon you have to download from the opticore page on GitHub.
If this doesn't help, can you specify more specifically?

[@JoshuaMKerr]

While I know it is not advised. Is it still possible to do this with a perspective camera? What are the possible issues with doing it that way?

[@howtoprint6002]

The main reason for using the Ortho camera is to get the linear view of the sensor, as presented here. Unless I miss something, from the raytracing/performance point of view, the persepctive camera is not different and will work jsut as well.

[@JoshuaMKerr]

@@howtoprint6002 This is going to sound very odd but what if rather than pointing a perspective camera at the 'sensor plane' you shoot straight through the lenses. I'm working on a project that is intending to use virtual lenses to get more interesting renderings. Would doing it this way essentially double up the focal length of the lens?

[@howtoprint6002]

@@JoshuaMKerr You can do it and you will see something (as I am sure you have tried already when playing around), but it is not going to be the same thing. The reason is the mapping of rays that are being traced to the pixels of the final output image. The standard perspective cameras (without depth of field option) are point sources, i.e. all rays originate from one point and are mapped to the pixels according to direction. With the depth of field option, rays are distributed over different origin locations (e.g. a circular aperture), but still mapped to pixels by direction. For a sensor, it would be that output pixels are mapped by origin location, summing rays from different directions. i.e. the other way round from perspective + depth of field. The orthographic camera does map by location, but without the summing over direction aspect.

[@JoshuaMKerr]

@howtoprint6002 Interesting, thanks for all of the info. Do you think it would be possible to have a chat with you at some point, perhaps over zoom or email. It would be good to pick your brain.

[@howtoprint6002]

@@JoshuaMKerrI've just sent you an email.

[@tobiashagstrom4168]

I pretty much can't follow along with this on Blender 3.0. LuxCore is apparently not for this version, or something. The material nodes I get presented with are different from what you get. Etc.