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宽视野面板下光学镜头设计用于智能手机的指纹识别

Cheng-Mu Tsai¹, Sung-Jr Wu¹, Yi-Chin Fang²

¹Graduate Institute of Precision Engineering, National Chung Hsing University, Taichung City 402, Taiwan.

|March 28, 2024

概括

本研究介绍了一种光学镜头设计,用于全屏智能手机的显示屏下指纹识别. 创新的镜头确保了高图像质量,并符合行业标准,用于先进的生物识别身份验证.

科学领域:

光学是什么?光学是什么?光学是什么?
生物识别身份验证
智能手机技术智能手机技术

背景情况:

显示屏下的指纹识别在全屏智能手机中是一个不断增长的趋势.
光学指纹传感器对于这项技术至关重要.
现有的解决方案面临着空间和性能方面的挑战.

研究的目的:

提出一种新的光学镜头设计,用于显示屏下进行指纹识别.
为了优化镜头参数,以在紧的智能手机形状因素中获得高质量的成像.

主要方法:

一个三塑形形球状透镜系统的设计.
分析光学性能,包括有效焦距 (EFL),视野 (FOV) 和总轨道长度 (TTL).
评估图像质量指标:调制转移函数 (MTF),扭曲和相对照明 (RI).
评价耐受度的灵敏度和蒙特卡洛分析,以确定制造可行性.

主要成果:

该设计的镜头具有0.61mm的EFL,126°的FOV和2.54mm的TTL.
实现的MTF超过80%在中心,70%在0.7FOV.
扭曲率小于8%,相对照明率 (RI) 在1.0毫米的图像高度大于25%.
设计符合行业标准的耐受性,灵敏度和可靠性.

结论:

拟议的光学镜头设计适用于智能手机的显示屏下指纹识别.
该镜头实现了出色的图像质量,并满足了关键的性能规格.
这种设计有助于在移动设备中推进安全和无的生物识别身份验证.

关键词:

这是一个LED背光灯.在屏幕下面的指纹识别功能.光学设计的设计.耐受性分析是一种耐受分析.

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