Відео

Thank you for the feedback! I plan to publish the next tutorials in about a week, which will cover the principle setup in Cycles and LuxCoreRender. I hope those will cover your second question. Regarding the size of lenses, they have to be to scale with the scene you are setting up. If the lenses including detector/camera setup are scaled by some factor, you effectively scaled the focal length, but not the field of view and f-number. The result would be that the depth of focus is wrong. Note that currently OptiCore assumes units of millimeters, while Blender natively uses meters, so you might need to scale by a factor of 1000 - depending on how you modeled your scene.

@@howtoprint6002 Can't wait!!!

Can't report on findings yet. More tests are planned for Video number 3. A first one I tried already was surprisingly stable, compared to what I remember from my tests with LuxCore a long while ago. However, I'm curious how this may vary for different lens designs. Ultimately, I don't thinkone can do much more, unless you rewrite Blender and any Renderengine to work entierly in 64bit float. Ray portals sound like a good solution for many applications.

@ thats what I was thiniking with the bit depth, my workaround was to 'RayPortal' the rays back to a static cam at the origin. But Camera Motion blur becomes dead. Hoping to get you in contact with someones alternative method thats releasing soon. Its very well built. I'll hit u up on instagram

Ah I see, valid point about motion blur. Would be interesting to get in contact about alternative methods. I also have some Idea how something like this can be done efficiently, but again that requires implementation in the render engine. Instagram won't be a good channel for me, though. You can find contact information on the github page.

The zmx-import handles cemented lenses just fine. Some lens groups in the examples I show are cemented. You can find example files at Thorlabs or Edmund optics.

@@howtoprint6002 I was testing with Thorlabs lenses actually - the lens gets imported as single body despite showing correctly in zemax, hence my question.

​@@howtoprint6002 Using Thorlabs AC254-030-A to replicate my problem in new project, getting the same result. Single lens body gets imported, no materials assigned. Yet opening it in zemax shows the expected structure. Is this intentional approximation or bug?

@@Konecny_M I just downloaded and tested that Thorlabs file. It works exactly as expected for me, including sequential raytrace. OptiCore creates a single body for cemented lenses, the middle surface is inside, you should see it in wireframe view. I do not currently have any access to Zemax to cross check how it is displayed there. It is consistent with WinLens, also for the raytrace when matching the stop size. If you still feel something is wrong, it would be helpful to have some pictures, you could open an isue on Github for example. About the materials, it only loads the refractive index for the internal "Add ray fan" feature. Materials for Cycles etc. are not created automatically.

By the way, it's nice to get feedback on this project from a user with a background in optics! Keep it coming ;)

I actually tried beamsplitter with variable ratios but did not manage to get good results yet.

I did have Pentaprisms in mind before. According to my local repo I last worked on it 3 years ago 😅 It was not on my priority list, but if there is some interest, I will bump that.

@howtoprint6002 I was trying to make a ww2 optical rangefinder, it requires pentaprisms so they'd be helpful! But I'm probably a minority, I 3d model random things for fun.

There is another option for you: You can find prisms at those off-the-shelf manufacturers I mentioned in the video. Similar to the zmx-files for optics, they offer CAD-files for most parts. Typical formats like STEP can't be opened directly by Blender, but there are freeware options like FreeCAD to convert them to STL.

​@@ravenpotter5131 I did try pentaprism, worked on first try. If you want the PLY file just drop me a message.

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.

Good question! Maybe it is good to say the combination works well for me and my purposes. Without the brim, in the past, I still had some warping of the first layer in the corners due to the material shrinkage. With the brim, this was effectively resolved. At the same time it is not that much effort to remove, I had more trouble getting rafts off easily in the past if settings are not correct. Therefore, I have been doing it like this for some time now. I should add, I have also not really tried other combinations since.

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.

@@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?

@@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.

@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.

@@JoshuaMKerrI've just sent you an email.

Thaks for your long and detailed comments! Regarding this question, the menu unfortunately can't be accessed again after the model is created. This is standard Blender behavior in that regard, as a consequence of it being vertex and not parametric based modelling. because you can then edit any vertex in any way, this would break the geometry away from some mathematical model, and storing the parameters makes little sense. There are already requests to implement the ability to change the lenses afterwards, but it would need some custom implementation, and I did not have the time so far to dive into this. But it is not forgotten.

Yes, it should work. What does the error message say?

@@letskirschjoghurt7359 ua-cam.com/video/3vJ9WZXZW2k/v-deo.html I made a short video showing what's happening. Error happens when I try to enable it in preferences. I screen-recording this on my Mac, but I'm getting the same error on PC.

@@gopalshah Good idea posting a video, that makes it very clear! Indeed, this 1.0 release version I made some time ago is known to cause this issue. You can better download the addon as the "latest" package. See this issue on GitHub for details: github.com/CodeFHD/OptiCore/issues/17

@@howtoprint6002 Ah, thanks! That was easy :) thanks for making this add-on. I look forward to playing around with it + LuxCore.

No, for these few objects I just typed some angle keyframes by hand

Rainbow effects are not a feature of this addon, but of a Render engine such as Cycles or LuxCoreRender. The keyword here is spectral rendering, or dispersion. LuxCore does support it with its glass material. For cycles, AFAIK it is not yet available but comming. OptiCore only has the purpose to efficiently generate the geometry of optical elements. Not material or light properties.

Technically yes, though more on account of not being used much rather than being worn out ;)

Hi, I'm currently trying I'm curious to know if you succeeded 😊

@@djo6666 hi there. I watched this tutor to model scope to order, but my client refused such complexity, so i gave it up

@@phonkstalker498 oh okay🤘 that's for my portfolio so i need to achieve it 😀

The laser is a part of the LuxCoreRender Engine. There, it is an option to the 'Area' light source

@@letskirschjoghurt7359 how can we download that engine

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?

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.

@@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 🤔

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

Cylindrical lenses are already available under the "Square Lens" object

@@howtoprint6002 Oh i see! i ended up just making my own with some circles extruded upward, sorry i am just seeing this response now! Great news ! i got an anamorphic lensing system working in blender, you should check it out! I used your program to generate two spherical lenses for a variable diopter set. I hope that is alright with you. ua-cam.com/video/F2cfuNXPfFo/v-deo.html

Hi, hope this will still help after a month... In LuxCore, Laser is hidden as an option to the "Area" type light source

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

@Krew Crosby Flixportal :)

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

@Krew Crosby Happy to help xD