Optical system for a virtual retinal scan display, and method for projecting image content onto a retina

US12339453B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Andrea Marchini · Aspenhausiedlung, DE
• Andreas Petersen · Erbach, DE
• Christian Nitschke · Aspenhausiedlung, DE
• Eva Lea Elisabeth Empting · Küssnacht, CH
• Gael Pilard · Aspenhausiedlung, DE
• Hendrik Specht · Rübgarten, DE
• Joerg Carls · Altdorf, DE
• Johannes Hofmann · Rötteln, DE
• Maximilian Busch · Reutlingen, DE
• Sebastian Reiss · Reutlingen, DE
• Simon Pick · Rötteln, DE
• Tadiyos Alemayehu · Pfullingen, DE
• Thomas Kuenstle · Reutlingen, DE

Key dates

• Filing date: Feb 16, 2022
• Grant date: Jun 24, 2025
• Expiry date: Dec 2, 2043

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B2027/0187
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An optical system for a virtual retinal scan display. The optical system includes an image source which supplies image data, an image processing device for the image data, a projector unit having a light source modulatable in time for generating a light beam, and an actuable refraction device for the light beam for the scanning projection of the image content, a deflection unit onto which the image content is able to be projected and which is designed to guide the projected image content onto an eye of a user, and an adaptive optical element for modifying a beam divergence, which is situated in the optical path between the light source and the deflection unit. The adaptive optical element is able to be actuated so that the beam divergence of the light beam is variable as a function of the angle of incidence of the light beam on the deflection unit.