Centre National De La Recherche Scientifique

Commissariat a L'energie Atomique

Universitéde Strasbourg

Institut National Des Scienes Appliquees

Institut National Des Sciences Appliquees

Patrice Twardowski

Patrick Meyrueis

Jean-Paul Grandjean

Joël Fontaine

Jianming Yang

Bernard Kress

Jean-Pascal Alfille

Jean-Marc Dufaud

An optical guide for a near-eye display device includes a first guide element having a light input zone and a second guide element having an output zone. The first guide element is superimposed on the second guide element. The optical guide also includes an optical coupling system between the first guide element and the second guide element, and the first and second guide elements have, on the first part of their length, a mutual spacing so as to delimit a thin layer of air between said guide elements extending between a first longitudinal end of the guide elements and the optical coupling system. The optical coupling system, located at a second longitudinal end of the first and second guide elements, includes a single-piece portion of the guide elements, associated with an optical reflection member to propagate the beams of light from the input zone toward the output zone.

Optical guide and optical system

Device and method for extended distance cutting by laser, in pulse mode

An optical device for focusing a light beam. The device includes a Fourier diffractive element that can separate an incident beam into n beams along n directions which are symmetric about an optical axis. The device also includes a diffractive element including n Fresnel lenses capable of refocusing the n beams onto the optical axis. The device may be used with lasers and laser cutting devices.

Diffractive optical system with synthetic opening and laser cutting device incorporating this system

Growing community of inventors

Strasbourg, France

Patrice Twardowski