US 12,443,034 B2
Optical film and optical imaging system
Lin Wang, Shenzhen (CN); Hongxiu Zhang, Shenzhen (CN); Xiaofeng Tang, Shenzhen (CN); Fei Hu, Shenzhen (CN); Xin Yu, Shenzhen (CN); and Yi Li, Shenzhen (CN)
Assigned to APPOTRONICS CORPORATION LIMITED, Guangdong (CN)
Appl. No. 17/641,043
Filed by APPOTRONICS CORPORATION LIMITED, Guangdong (CN)
PCT Filed Aug. 31, 2020, PCT No. PCT/CN2020/112632
§ 371(c)(1), (2) Date Mar. 7, 2022,
PCT Pub. No. WO2021/047411, PCT Pub. Date Mar. 18, 2021.
Claims priority of application No. 201910859557.3 (CN), filed on Sep. 11, 2019.
Prior Publication US 2022/0326516 A1, Oct. 13, 2022
Int. Cl. G02B 27/01 (2006.01); B60K 35/231 (2024.01); B60K 35/50 (2024.01); B60K 35/60 (2024.01); G02B 17/08 (2006.01)
CPC G02B 27/0101 (2013.01) [B60K 35/231 (2024.01); B60K 35/50 (2024.01); B60K 35/60 (2024.01); G02B 17/08 (2013.01); B60K 2360/23 (2024.01); G02B 2027/012 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An optical film, comprising at least a first lens layer, a first deflection layer, a reflection layer, a second deflection layer, and a second lens layer that are sequentially stacked, wherein the second lens layer is attached to a windshield;
the first lens layer is configured to amplify an image light beam and transmit the amplified image light beam to the first deflection layer;
the first deflection layer is configured to deflect the amplified image light beam and transmit the deflected image light beam to the reflection layer;
the reflection layer is configured to reflect and transmit the deflected image light beam, the deflected image light beam reflected by the reflection layer forms a first reflected light beam, and the first lens layer and the first deflection layer are configured to amplify and/or deflect the first reflected light beam, so as to guide the first reflected light beam to a field-of-view direction; and
the deflected image light beam transmitted by the reflection layer passes through the second deflection layer and the second lens layer, and is reflected by the windshield to form a second reflected light beam; the second lens layer and the second deflection layer are configured to amplify and/or deflect the second reflected light beam, so as to guide the second reflected light beam to a first direction different from the field-of-view direction.