Standard and high-resolution Fizeau interferometers

Hardware

Fizeau interferometers are often used to exactly measure the surface characteristics of optics such as lenses or mirrors. The development team of Äpre Instruments

The development team at Äpre Instruments can rely on decades of experience in the interferometer industry and has put all the knowledge gained into the development of its own modern Fizeau interferometers and light sources.
In the devices of theS series the optical bench is completely separated from the electronics board. State-of-the-art digital cameras are used both for aligning the optical axis and for measuring the surface. The image resolution can be configured up to 9 megapixels. Communication with the PC takes place via USB3.

Software Reveal

Not only the hardware but also the software comes completely from Äpre Instruments. In digital interferometry, the software for controlling and evaluating the data is at least as important and decisive as the hardware. The software developers at Äpre Instruments have therefore worked for years to write software that is as user-friendly as possible for use in optics manufacturing and at the same time extremely powerful.
View software

Spectral Controlled Interferometry

All standard and high-resolution Fizeau interferometers from Äpre Instruments are equipped with a frequency-stabilized SLM 633 nm HeNe laser. The measurement technique can be carried out using either traditional phase shift, vibration-tolerant phase shift or the vibration-insensitive carrier fringe method. In addition, each interferometer can be connected to Äpre Instruments’ own specially developed light source, which can be used to measure different surfaces separately using the so-called SCI technology (Spectrally Controlled Interferometry).
View SCI light source

For more in-depth reading on the subject, we recommend this article.