Optical film and optical imaging system
By attaching an optical film to the windshield and using a phase cancellation layer and a reflective layer to eliminate ghosting in the HUD system, a virtual image can be directly formed on the windshield, solving the problems of poor imaging effect and space occupation in the HUD system and improving the driver's visual experience.
CN114488527BActive Publication Date: 2026-07-03APPOTRONICS CORP LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- APPOTRONICS CORP LTD
- Filing Date
- 2020-10-23
- Publication Date
- 2026-07-03
AI Technical Summary
Technical Problem
In existing HUD systems, the windshield imaging effect is poor, requiring multiple freeform surface mirrors that occupy space and produce ghosting, affecting the driver's visual experience.
Method used
An optical thin film, including a phase cancellation layer, a reflective layer, and a microstructure layer, is bonded to the windshield to form a virtual image and eliminate ghosting.
Benefits of technology
Optical thin films can form virtual images directly on the windshield, eliminating ghosting, saving space and eliminating the need for additional optical imaging devices, thus improving the driver's visual experience.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN114488527B_ABST
Abstract
The application discloses an optical film and an optical imaging system. The optical film is attached to a windshield and comprises, in sequence from top to bottom, a phase cancellation layer, a reflection layer and a microstructure layer. The reflection layer is configured to reflect an image beam to form a first reflected beam. The phase cancellation layer is configured to amplify and / or deflect a second reflected beam to guide the second reflected beam to a second exit direction. The normal vector of the microstructure layer is directed towards a first exit direction. The microstructure layer is configured to guide the first reflected beam to the first exit direction. The phase cancellation layer is configured to cancel the phase difference caused by the microstructure layer. The second reflected beam is formed by the reflection of the image beam by the windshield. The first exit direction and the second exit direction are different. In this way, the optical film can form a virtual image directly when attached to the surface of the windshield, and ghost images can be eliminated.
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