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Using HASO to compliment a beam profiler - VIS NIR optical metrology Application Notes

Using HASO to compliment a beam profiler - VIS NIR optical metrology Application Notes
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Using HASO to compliment a beam profiler - VIS NIR optical metrology Application Notes - 1

Using HASO to compliment a beam profiler Imagine Optic, 18 rue Charles de Gaulle, 91400 Orsay, France contact@imagine-optic.com HASO wavefront sensors – the ideal companion for your beam profiler Customers that work with lasers know how important it is to have a properly aligned optical system to optimize the efficiency of their beam. In this technology note, we will explain why HASO Shack-Hartmann wavefront sensors are an ideal complement to your beam profiler. Beam profilers are excellent, inexpensive tools for measuring the intensity of your laser at a very high spatial resolution. While they are extremely useful, the fact that they only measure intensity means that the data you rely on to perfect your beam is limited to the consequences of its imperfections rather than the causes behind them. In contrast to beam profilers, HASO wavefront sensors use a wealth of patented technologies to measure your beam’s phase and intensity, simultaneously and independently. This functionality, unique to HASO, provides you with information on the beam’s geometric parameters and propagation as well as on the perturbations it’s undergone. Using HASO to compliment a beam profiler N.Varkentina www.imagine-optic.com 6 October 2020 – Property of Imagin

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Using HASO to compliment a beam profiler - VIS NIR optical metrology Application Notes - 2

The data you acquire allows you to understand the While, as we said, beam profilers are excellent tools, beam’s evolution over time and space, and to the inherent limitations of their technology also limit determine where the problem is in your assembly in their effectiveness. In situations where speed and order to correct it quickly. precision are absolute necessities, a beam profiler alone may not be sufficient to get the job done. One of the HASO family’s many advantages is that it can be used in conjunction with your beam profiler, or in its place, allowing you to decide for yourself...

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Using HASO to compliment a beam profiler - VIS NIR optical metrology Application Notes - 3

see the introduction and related documents on measure and correct highly aberrated, convergent or divergent beams quickly and precisely. products provides several key advantages over other Shack-Hartmann technologies. Part of the secret behind HASO’s performance is the quality of Imagine Optic’s microlenses and the fact Simultaneous and independent measurement of that the microlens assembly is comprised of an phase and intensity – HASO wavefront sensors use exceptionally high quality optical medium with the patented technology to provide the unique ability to microlens’ convex surface...

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Using HASO to compliment a beam profiler - VIS NIR optical metrology Application Notes - 4

Analyzing and adjusting phase and intensity Our HASO products provide you with advanced software tools that take full advantage of the sophisticated hardware technology in our wavefront As we discussed earlier, HASO wavefront sensors, used in conjunction with HASOv3 wavefront analysis software, allow you to measure your beam’s phase and intensity simultaneously and independently. The PSF (Point Spread Function) and Strehl ratio data you acquire is not affected by severe variations in your beam’s intensity that can provoke other technologies into providing false measurements. In short,...

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Using HASO to compliment a beam profiler - VIS NIR optical metrology Application Notes - 5

field on different planes and reconstructing the envelope of propagation. Figure 6. Zonal pupil reconstruction. Figure 5. Example of M² calculation A product of the phase measurement, the M² enables you to verify the position and quality of the beam’s waist, to check the alignment and quality of focusing optics, to analyze the divergence of the beam as a whole or in any given direction, and to judge your beam’s overall performance. HASOv3 equally offers a zoom function that allows you to magnify the displayed graphics to examine them in detail. aberrations in your beam and compare it to...

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Using HASO to compliment a beam profiler - VIS NIR optical metrology Application Notes - 6

When you choose to work with a circumscribed pupil, For every application, there’s a HASO to respond to HASOv3 provides the unique, real-time (Figure 1 your needs. For example, HASO3 32 is an economic upper image) ability to detect the radius around your choice for characterizing and aligning beams with few imperfections, 128 GE is perfect for fine tuning, measurement points with no signal, provides you and HASO4 first (with a Single wavelength calibration with its true form. When you choose to work with an (±50 nm)) or a unique HASO4 Broadband (with Full inscribed pupil, HASOv3 allows you...

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