Zemax vs CODE V: Choosing a Lens Design Platform
Zemax OpticStudio and CODE V are the two dominant tools for professional custom optical design. Both can design and tolerance essentially any imaging system a product team is likely to need, and a skilled designer produces excellent results in either. The differences are real but often smaller than newcomers expect, and they matter most at the edges of a program rather than the center.
What both do well
Both platforms handle sequential ray tracing, aberration analysis, global and local optimization, and Monte Carlo tolerancing. Both model aspheres and freeforms, compute modulation transfer function, and support scripting for automation. For a typical refractive imaging lens, a camera objective, or a projection system, either tool will get you to a manufacturable design.
Because of this overlap, the choice is rarely about whether a design is possible. It is about workflow, specific analyses, and what the surrounding team already uses.
Where CODE V is often preferred
CODE V has a long reputation for optimization and tolerancing on demanding imaging systems, and for fast, well-regarded global optimization. Teams designing complex multi-configuration or wide-field imaging systems, or those in aerospace and defense lineages, frequently standardize on it. Its tolerancing and analysis outputs are trusted in environments where the design must be defended rigorously.
Where Zemax OpticStudio is often preferred
OpticStudio is widely praised for an approachable interface, strong non-sequential ray tracing for stray light and illumination, and a large user community with abundant learning material. Programs that combine imaging with illumination, stray-light analysis, or mechanical integration often favor it, and its non-sequential mode is a common reason teams reach for it on sensing and illumination work such as LiDAR and HUD optics.
The factors that actually decide it
For most teams, the practical decision comes down to a few things rather than a feature checklist:
- what the designers you will work with already know, since expertise in the tool matters more than the tool;
- whether the program needs strong non-sequential stray-light and illumination analysis in the same environment;
- what your partners and suppliers use, since exchanging designs is easier within one ecosystem;
- licensing cost and availability for the duration of the program.
A design produced in one tool can be rebuilt in the other, but round-tripping is rarely seamless, so alignment across the team and its partners is worth more than any single feature.
A pragmatic recommendation
If you are hiring or contracting the design work, let the designer use the tool they are strongest in; the result depends far more on the engineer than the software. If you are building an in-house capability from scratch, weigh the surrounding needs: heavy illumination and stray-light work leans toward OpticStudio, while rigorous imaging and tolerancing lineages often lean toward CODE V. PAO designs and tolerances in both, selecting the tool that fits the system and your ecosystem. If you are unsure, optical design consulting can help you decide before you commit to a platform.