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Parallelism (Wedge)

• Measuring parallelism

Wedge or parallelism can be measured using the MiniFIZ interferometer. One technique requires no auxiliary optics because interference is obtained between wavefronts reflected from the two surfaces of a transparent element. The element must only be placed nominally perpendicular to the mainframe output beam. The optical and mechanical wedge can be calculated from the resulting interference pattern. There are a variety of other techniques, some with a fraction of an arc second resolution, which can be used to measure wedge using a phase measuring MiniFIZ.

Suggested Accessories: Phase Shifting Interferometer; Mount, 2-axis (tip-tilt); Self-centering element holder. 

Products related to this application:

MiniFIZ

Related applications

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Transmitted wavefront of flat optics

Prism Testing Metrology

Disk Flatness

Interferometer setup

Spherical optics