Optical systems and display devices
The optical system for AR devices enhances light utilization efficiency by controlling the angles of reflective surfaces in the light guide element, ensuring clear and high-quality virtual image display with minimal light loss.
JP2026087398APending Publication Date: 2026-05-27CANON KK
Patent Information
- Application Number
- JP2024200088
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-11-15
- Publication Date
- 2026-05-27
AI Technical Summary
Technical Problem
Existing optical systems for augmented reality (AR) devices suffer from low light utilization efficiency, which affects the quality and clarity of virtual images displayed.
Method used
An optical system comprising a projection unit that forms a first pupil and a light guide element with a reflective unit having multiple pairs of reflective surfaces, where the angles between incident and reflected light rays are carefully controlled to enhance light utilization efficiency, forming a second pupil at the eye point.
Benefits of technology
The system achieves high light utilization efficiency, providing clear and high-quality virtual images with minimal light loss, enabling a wide field of view in AR devices.
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Smart Images
Figure 2026087398000001_ABST
Abstract
To provide an optical system with high light utilization efficiency. [Solution] The optical system includes a projection unit (120) that projects light from a display element (190) to form a first pupil (130), and a light guide element (110) that guides light from the projection unit to the eye point. The light guide element has a reflecting unit (150) that forms a second pupil (171) at the eye point. The reflecting unit comprises a plurality of pairs of reflecting surfaces (210), each consisting of a first and a second reflecting surface. In a first cross-section including the normals of the first and second reflecting surfaces, when the angle between the light incident on the first reflecting surface and the second reflecting surface is α(°), and the angle between the light reflected by the second reflecting surface and the first reflecting surface is β(°), with respect to the principal ray of the central field of view, 0 ≤ |α| ≤ 20 0 ≤ |β| ≤ 20 The conditions are met.
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Citation Information
Patent Citations
Optical system, display, and method for manufacturing optical system
JP2024065027A
Optical system for transmitting a source image
WO2019120839A1