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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

Simplicity

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 everybody can use.

Performance

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.

Robustness

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 accuracy with our easily deployable off-the-shelf table top setup

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

Comparative results with the best high-end instruments

We have made many measurements of very different samples, and were able to compare our results to the ones obtained by instruments like Taylor&Hobson Luphoscan, DUI Nanomefos, and Zygo interferometers. As an example, 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.

Classic deflectometry vs coaxial deflectometry (patented)

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.

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