I am in non-sequential mode trying to design coupling optics to fiber couple a Lambertian source into a 980um/0.57NA fiber.  After completing my design which consists of two even aspheric lenses, I want to perform a tolerance analysis.  In sequential mode there are many operands available to tolerance lens surfaces. How do I go about tolerancing the lens surface of each aspheric surface in non sequential mode?  What options do I have for lens tolerancing in non sequential mode?

Hi all,First things first, I am still using Zemax 2012, so this may be a limitation. I have a relatively simple setup: input fibre, half ball lens, PCX lens to collimate a beam, the beam passes through a test glass, and is collected onto an output fibre using a PCX lens and half ball lens combination. I optimise the energy throughput from fibre to fibre (using IMAE). The lens and test glass diameters are fixed. The optical beam is allowed to overfill the first PCX lens, but any rays passing through the first lens MUST NOT overfill the test glass or the second PCX lens. For short throw distances (distance from the first PCX lens to the test glass, and from the test glass to the second PCX lens) the Hammer Optimiser works just fine. I have the IMAE merit function to optimise the energy throughput, and I have MXSD merit functions on the test glass and second PCX lens to ensure that the beam is completely within them (no overfill).For short throw distances (like 500mm) the optimisation wor

Hi everyone!I've built a user extension called Wavefront Reconstructor for Zemax that reconstructs the wavefront map directly from an NSC ray trace. If you've ever needed wavefront error metrics in Non-Sequential mode and found yourself stuck, this might be useful.The extension reads the .ZRD file produced by the NSC ray trace, extracts the ray positions and direction cosines at the detector, and reconstructs the wavefront surface using Frankot–Chellappa integration. It outputs PV and RMS in both microns and waves.One thing to keep in mind: the wavefront error is referenced to a perfect flat wavefront at the detector plane (afocal reference), not to the exit pupil as in Sequential mode.Tested on OpticStudio 2017 and 2025.—Installation: copy all 8 files into your Extensions folder:C:\Users\<username>\Documents\Zemax\ZOS-API\ExtensionsFiles included:Wavefront Reconstructor.exeWavefront Reconstructor.exe.configMathNet.Numerics.dllScottPlot.dllScottPlot.WinForms.dllSystem.Drawing.Com

The manual states that ISFN returns a paraxial-only f/# and WFNO returns a real-ray f/#.  Nothing is said about ISFN accounting for vignetting.  WFNO allegedly accounts for vignetting following a SETVIG or SVIG operand.  However, I’m not seeing this happen with WFNO in a vignetted system, as the focal ratios are identical to 6 digits for both unvignetted and vignetted analysis.  I’m also not seeing either SFNO or TFNO accounting for vignetting, either.  The manual does not state whether they are based on paraxial or real-ray analysis.  Is this another example of users having to write a macro to make Zemax do what the manual says it is supposed to already be doing?  

Does Zemax have the internal to export the envelope of beam footprints on surfaces to a mechanical engineering file?

HiI am trying to analyze scatter contribution in my imaging system for off axis mirrors using different surface roughness. For example I have calculated the A, B & g values for 10nm surface roughness and used those values to create an ABg file in the ABg scatter catalog,the TIS calculator showed 0.0058030 (The value is less than 1%).While trying to assign this created ABg file to the mirror the following error on Total integrated scatter pops up.Can anyone help me in understanding this error pops up  when my calculated TIS is less than 1% ? 

I am using us_array.dll to represent the lenslet array in sequential mode. Is there any way to rotate the lenslet array by an angle?

And also, how do I know which one to use when comparing against real life lenses and optical systems?

Hi everyone!If you have ever tried to find a good reference for modeling a beam splitter in Zemax, you have probably noticed that most examples either go the Non-Sequential mode, which means losing access to aberration metrics, OPD, MTF and all the sequential analysis tools we rely on, or they use Sequential mode but with a multi-configuration setup, which works but can get unnecessarily complicated depending on what you are trying to simulate.After going through that myself, I put together this guide in case it helps anyone who runs into the same situation, since getting this right can be trickier than it looks. The goal is to show a simpler path: a non-polarizing beam splitter modeled entirely in Sequential mode, in a single configuration. No mode switching, no extra configurations. Just a clean sequential system that still gives you full access to all the analysis tools.To keep things concrete, the system I will use as an example is based on this layout, which is pretty close to wha

Hi guys!I am working on a tolerancing analysis of an optical system that includes a beam splitter, and I have come across a coupling issue that I would like to understand better.In the nominal configuration, all elements are centered and the system is fully aligned.When I introduce a Y decenter of +20 mm on the beam splitter on the lens data editor, this physically displaces the element along the vertical arm of the system. As a result, the optical path length in that arm should change accordingly. A +20 mm decenter on Y should reduce the effective thickness by 20 mm, from 239.617 mm to 219.617 mm. However, Zemax keeps the thickness at 239.617 mm regardless of the decenter, which is not physically correct.My question is: is there a way to link the Y decenter of the beam splitter to the thickness of the preceding surface, so that when the beam splitter is decentered by a given amount the thickness is automatically compensated by the same value? Ideally I would like to keep using TPAR to

Hi All,I am currently designing a low‑cost imaging lens for a sports application. In my lens model I use the REAY operand to control image height, the RAID operand to control chief‑ray angle (CRA), DIMX to control f‑theta distortion, LACL for lateral‑color correction, RSCH for spot size and MTFT/MTFS for resolution across the field. During optimization I can obtain either good MTF or good lateral color with CRA and distortion depending on the operand weightings, but I cannot find a stable balance even when I adjust the weights gradually. In both cases, my geometric spot‑size results were poor. Please suggest optimization techniques to achieve a better trade‑off, or alternative approaches to indirectly control these parameters.Note: candidate glass materials must have hardness greater than 450. Thank you in advance for your support.

Dear all, In the manual, it is written : “Samp: The grid size. A value of 10 would yield a 10 x 10 grid of rays”. I need to use CENX(Y) with the highest accuracy. What is the maximum acceptable value of samp ? Is there another way to increase the accuracy of CENX(Y) ? Many thanks. Best regards, Thierry. 

Dear all,I’m working on a project of ultra-precise micro-arcsecond relative astrometry space observatory (Theia). Especially, I need to map the image plane (0.5°x0.5°) with a very high accuracy. For instance, I have to study the variations of positions of the PSF (with CENX/CENY) due to some perturbations (distortion, tilts of the mirrors...).By default, the number of fields is limited to 2025 for my premium version, but I would need 100x100 fields.It’s rather easy to generate such a new grid, but the parameter “i” (field number) of CENX/Y refers to the (default) field table.Is there a way to use CENX/Y with this new grid ?Many thanks,Thierry.