Lens & assembly testing

Easy setup for single-shot MTF and WFE measurements

The unique capability of Phasics's patented Quadri-Wave Lateral Shearing Interferometry (QWLSI) wavefront sensing technology allows the measurement of high numerical aperture beams without the need of any relay optics. This unique advantage simplifies the measurement setup. In a single shot, both wavefront error (WFE) and modulation transfer function (MTF) are measured. The qualification of objective lenses, subassemblies, and final assemblies is complete and easy to implement. Indeed, the SID4 wavefront sensor is simply placed in the diverging beam a few millimeters after the focus. Once measured, the wavefront measurement can be compared to the theoretical Zemax simulations thanks to the Phasics software module DesignPro. Some test protocols still require double-pass testing configuration, which is also compatible with SID4 wavefront sensors.

 

Measurement outputs

After being  measured with QWSLI (SID4 wavefront sensor) the wavefront can be compared to the design

Wavefront comparison to design

On and Off axis MTF is measured with QWSLI (SID4 wavefront sensor)

MTF at any frequency, on & off axis

Zernike polynomials and  optical abberations can be measured with QWSLI (SID4 wavefront sensor)

Optical aberrations

Advantages

Unique single-pass setup

  • High NA: up to 0.8
  • No relay optics, no null lens
  • Simplified alignment process

Unique optical test setup 

  • Wavefront measurement
  • Comparison to Zemax design
  • MTF and PSF

Reliable measurement

  • At the system working wavelength 
  • High-resolution measurements
  • Robust PSF and MTF calculations

Downloads

Related products

Related markets

AR/VR

Optical manufacturing

Aerospace

Related publications

None

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