{"id":389266,"date":"2024-10-11T12:57:11","date_gmt":"2024-10-11T12:57:11","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/length-units-in-zemax-beam-file\/"},"modified":"2024-10-11T12:57:11","modified_gmt":"2024-10-11T12:57:11","slug":"length-units-in-zemax-beam-file","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/length-units-in-zemax-beam-file\/","title":{"rendered":"Length units in Zemax Beam File"},"content":{"rendered":"<p>&lt;p&gt;As per documentation, a length unit is defined in a ZBF file. Yet the the waist of the pilot beam shall be given in lens units. Is that indeed correct? This is surprising since the lens unit might be unknown when the ZBF is generated. Also the pilot beam z position and Rayleight length seem to be not in lens units according to documentation.&lt;\/p&gt;&lt;p&gt;Also the wavelength shall be given in lens units, which is not in agreement with my own experience: when working with millimeter lens unit and a wavelength set in ZEMAX of 15 micrometer, I had to specify the wavelength in the ZBF file as 15e-6, otherwise I got a warning that the wavelengths do not match.&lt;\/p&gt;&lt;p&gt;Could the exact units for the ZBF entries that have a length please be clarified.&lt;\/p&gt;&lt;p&gt;Thanks, Oliver.&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-389266","topic","type-topic","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"As per documentation, a length unit is defined in a ZBF file. Yet the the waist of the pilot beam shall be given in lens units. Is that indeed correct? 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