WaveMaster^® Software

Real Time Wavefront Measurement

The advanced software works with all WaveSensor^® and WaveMaster^® instruments. The overall task of the software is the communication with the Shack-Hartmann Sensor and the analysis of the measured wavefront. In addition, the software controls the WaveMaster^® instruments. Therefore, software modules depending on the specific WaveMaster^® instruments are available, as for example for the production instruments.

The software package features a high ease of use, a menu-driven operator guidance and advanced data management, which allows for easy and intuitive wavefront measurement and analysis.

All aspects of data acquisition starting with data calculation, calibration and display of the data are under software control and fully automated. Furthermore, extended tools for live analysis are available.

In addition theoretical data can be loaded from ZEMAX and Code V and compared in real time during measurements.

Display of the Measurement Results

To evaluate the optical systems’ wavefront, various ways of displaying the measurement results can be selected. Depending on the measurement task the following results are shown:

• Absolute or relative measurement
• Subtraction of background illumination
• Live display of 2D- or 3D-wavefront in μm, waves
• Live display of 2D fringes and phase
• Live display of Peak-to-Valley and RMS
• Live display of intensity
• Live display of slopes
• Live camera image
• Sample adjustment tools (tilt and position)
• Live correction of tilt and defocus
• Units of the measurement results: μm or waves

Data Saving

Of course, all sample related information and measurement results can be exported and saved in different formats:

• Slope data
• Wavefront data
• Zernike coefficient data
• Measurement certificates including measurement conditions, graphical as well as numerical display of measurement results
• COM-Port communication for external control

Wavefront Analysis

Live Zernike Analysis
Analysis of the Optical Properties

The typical optical properties and errors of a lens or lens system as e.g. defocus, coma or astigmatism are displayed in terms of Zernike polynomials.

Up to 121 Zernike coefficients are fitted to the wavefront by the WaveMaster^® software. The user chooses how much and which coefficients are used for the fit. A small misalignment which induces a tilt or a defocus can be suppressed without influencing the measurement result of the other Zernike coefficients. The measured wavefront is directly compared to either a reference measurement or a theoretical wavefront defined by a set of Zernike coefficients. All functions are available in real time.

• Live display of measured, fitted and residual wavefront (2D and 3D)
• Live display of cross sections
• Live numerical and graphical display of Zernike coefficients
• Free choice of coefficients included into or excluded from the analysis
• Input of theoretical wavefront data for comparison with measured wavefront
• Display of difference wavefront and difference coefficient

Zernike analysis window

Live MTF Display
Imaging Quality Evaluation

Additional analysis tools are provided with the calculation of the MTF and the PSF, which both indicate the imaging quality of an optical system.

A complete two-dimensional MTF is calculated and cross sections can be chosen at selectable degrees of rotation. The calculated PSF is used to calculate the Strehl ratio automatically.

Effective Focal Length

The effective focal length can only be measured with the WaveMaster^® Instruments since an automated focus stage is needed.

Software Extensions for WaveMaster^® Instruments

The WaveMaster^® instruments work fully automated thus all processes are controlled by the software. For example, the automated positioning of the sample or finding of the exit pupil is performed by the software. Therefore, an additional software package adapted to the instruments setup and measurement tasks comes with each WaveMaster^® instrument.

The details of the different software extensions
are described in the chapter of each WaveMaster^® instrument.

The additional features of these software tools are:

• Fully automated alignment of the sample under test
• Fully automated positioning of the Shack-Hartmann Sensor
• Autofocus function
• FFL measurement
• Software module for high volume production testing, including positioning system of a tray and pass/fail analysis
• Software for IOL measurement, all specific parameters for IOL measurement are implemented (dioptric power, power mapping etc.)