Exact TWE Determination Without Interferometer

For many measuring instruments, test setups, and imaging systems, the precise characterization of the wavefront profile determines the performance of the entire optical chain. One parameter is therefore of particular importance: the Transmitted Wavefront Error (TWE). 

This value describes the distortion of a light wave as it passes through optical components such as filters, windows, or other transmissive elements. In this white paper, our partner Alluxa presents a method that enables reliable prediction of TWE even without direct interferometric measurement. 

The approach allows for robust, scalable, and process-oriented quality assessment and offers significant advantages, particularly for large-area optics. 

In this white paper, you will learn about: 

• The basics about Transmitted Wavefront Error (TWE)
• Determining TWE based on wavelength uniformity
• Different validation methods
• Application and next steps