This article explains what the optimum values for the intermediate fields should be relative to the maximum field.

This article is also available in Japanese.

This article explains how to assign appropriate weight for the on-axis field when specifying fields for non-rotationally symmetric systems.  

This article is also available in Japanese.

On certain surface parameters, ZEMAX does not allow the placement of a thermal pickup solve. This article explains why.

This article explains how the TCE column in the Lens Data Editor is used to model optical mounts between lenses.

This article explains how to compute the effective width of an arbitrary POP beam.

This article is also available in Japanese.

This article demonstrates the use of the Geometrical Image Analysis feature to compute multi mode fiber coupling efficiency. The sample files can be downloaded from the last page of this article.

This article explains:

• The limitations of traditional glass choice methods like Conrady d-D and the use of model glasses
• How to use the Glass Substitution method for direct glass optimization
• How to further restrict glass choice to include factors like glass availability, cost, climate resistance etc.

This article is also available in Japanese.

This article demonstrates how to design a simple refractive beam shaper that converts a Gaussian intensity profile into a top-hat profile. Sample files are provided, which can be downloaded from the last page of this article.

This article demonstrates how the mechanical reference for the  lens mount can be arbitrarily changed.

This article demonstrates how to open several lens files using the ZPL macro. This is often useful for analyzing lens files generated by ZEMAX during the Monte Carlo tolerance analysis.