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OpticStudio 18.1 includes the following improvements and fixes:
• Optimizing - The optimization algorithm has been improved to handle scenarios in which the
optimizer is terminated in the middle of a cycle.
• Tolerancing - An issue has been corrected in which incorrect compensator statistics were shown
in the Tolerance output for systems with multiple compensators.
Sequential surfaces and analyses
• Optically Fabricated Hologram surface - Variables are now defined differently when optimizing
the Optically Fabricated Hologram (OFH) surface. OpticStudio no longer automatically includes all
variables in the construction files as a part of the optimization of the OFH surface. Instead, you
need to use the HLGV operand in the playback file to define which variables from the
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construction files should be made variable during the optimization of the OFH. This enables you
to completely control how the variables are used, such as using pickups to link variables in the
construction files. To make it easier to configure the HLGV operands, a new Add Hologram
Variables tool has been added to the Multiple Configuration Editor toolbar.
• Wavefront Map analysis – An issue that was introduced in OpticStudio 17.5 has been corrected:
The RMS wavefront error calculated in the Wavefront Map analysis incorrectly used the same
algorithm as the RMS vs. Field analysis.
• Elliptical Grating surface - The algorithm used to trace rays to the Elliptical Grating surface has
been improved to better handle grazing incidence rays.
Non-sequential analyses
• System Explorer - An issue has been corrected in which the Maximum Nested/Touching Objects
value used in calculations was twice the value displayed in the Non-Sequential section of the
System Explorer. Any file saved in a previous version now displays the correct value in the System

• Detector Viewer analysis- A minor error with calculation of the solid angle used by the Detector
Rectangle has been corrected. This error only occurred when viewing angular (intensity) data in
the Detector Viewer analysis, and when the detected intensity distribution had a large angular
• Paraxial Lens object - OpticStudio now supports defining the Paraxial Lens object as a mirror in
non-sequential mode.
• Zemax Programming Language (ZPL) - The LOADLENS keyword in ZPL no longer closes
previously open analyses after it opens a new ZMX file that does not have an associated session
• ZOS-API - A typo in the boilerplate code for the MATLAB interactive extension has been fixed.

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