Test & measurement


AN EYE ON S


HSWorks is a powerful and comprehensive wavefront analysis software package that allows complete Zernike polynomial analysis, PSF/MTF calculation, laser beam parameter calculation and refractive data. Developed by Optocraft, a member of the Micro-Epsilon group of companies since 2018, the software is fast and easy to setup using predefined configurations and users benefit from a variety of features such as data logging, advanced reporting and Pass/Fail analysis. In the ophthalmic market, Optocraft instruments measure refractive data of contact lenses and intraocular lenses (IOLs) and calculate the corresponding power map with a lateral resolution of up to 200 x 200 sampling points. The following application provides information on the use of the different power map features in SHSWorks, as well as some use case examples on contact lenses.


CONCEPT OF POWER MAPS


In general, a power map provides information on the local power distribution of the optical element under test. Originally, the concept of power maps was used for the description of topological data of the human eye and the closely related optical properties or aberrations to be corrected by a lens. These methods can be easily adapted to represent the optical power distribution of any specimen with unknown topological profile. However, rather than a topological surface, the same calculations can be applied to a measured wavefront or phase distribution.


DEFINITION OF POWER MAP TYPES


The power map is a 2D array of the local refractive power of the lens. SHSWorks offers


MEASUREMENT USING WAVEFRONT ANALYSIS SOFTWARE TO MEASURE THE OPTICAL POWER DISTRIBUTION OF CONTACT LENSES


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March 2024 Instrumentation Monthly


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