Laser system for generation of colored three-dimensional images

US10205935B2 · kind B2 · utility

Inventors

• Nikolay Ledentsov · Berlin, DE
• Vitaly Shchukin · Berlin, DE

Key dates

• Filing date: Aug 1, 2017
• Grant date: Feb 12, 2019
• Expiry date: Oct 4, 2037

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04N2013/0081
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

A laser system for generation of three-dimensional (3D) colored images based on laser sources generating light at a plurality of wavelengths including basic color range (red, green and blue) that illuminate a two-dimensional display, at a given color range wherein a plurality of 2D images formed at different depths by image light impinges on a first optical element, with wavelength-sensitive focal length. All images of the given colored range are perceived by the human's eyes as a single 3D image of this color range. 3D images in red, green and blue that are formed at different positions, are fused by a second optical element, with adjustable focal length. As the light is switched between red, green and blue color ranges, the adjustable focal length is adjusted to compensate a change of the focal length of the first element, so the human's eyes see a fully colored 3D image.