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Simple, fast, and affordable optical measurement of reflective surfaces at nanometric precision

Wyse Light invented coaxial deflectometry to make reliable high precision optical measurement easier and more accessible


A push-button instrument with no need of fine alignments. To lift the fundamental shape ambiguity associated with deflectometry, we have invented and patented coaxial deflectometry, an innovative implementation that yields nanometric precision that even a child can use.


Deflectometry is capable of measuring complex shapes and freeforms with no need of costly nulls or CGHs. Middle and high spatial frequencies are measured with an accuracy better than 5 nm, and the low frequencies with a typical 20 nm accuracy.


Integrated calibration bench for camera/lens sight rays characterization. Self-calibrating: camera and screen positions are numerically fine-tuned for each measurement. Low sensitivity to parasitic vibrations: no damped optical table required!

Nanometric precision with our easily deployable table top setup

WYSE light Ray Master is composed of a measurement head and a display screen, that can be used on a regular table top desk, deflectometry being basically insensitive to vibrations.

We have made several measurements of different objects, and were able to compare our results to the ones obtained by a Taylor&Hobson Luphoscan and by an interferometer. On the left, you can see the measurements of a 2 inches diameter spherical mirror with a 200 mm focus performed with interferometry and with our product.

Comparison with interferometry. Average difference is 19 nm.

Deflectometry vs our patented coaxial deflectometry

Deflectometry is a technique that has long been known in the field of optical metrology of reflective objects. It is based on the analysis of the image of periodic patterns reflected by the object under examination, that carries in some way information about the object shape.

A well know limitation of deflectometry for shape measurement is a fundamental ambiguity: there is an infinite number of solutions for the shape, depending on the unknown camera-to-object distance. WYSE light patented technology, coaxial deflectometry, overcomes this limitation.

Let’s work together

Are you curious to check the fit and performance of our product with your requirements? Call us!

We can demo on your parts. We can also rent our products or take measurements for you.