The embodiment of the utility model discloses an on-board monitoring optical system for anti-fatigue driving, which comprises the first lens, the second lens, the third lens and the fourth lens in turn along the optical axis from the object plane to the image plane; the surface side of the first lens is convex, the image plane side is concave, and its light focus is negative; the surface side of the second lens is convex, and the image plane side is concave, and its light focus is positive; The object side of the third lens is convex, and the image side is convex, and its optical focus is positive; the object side of the fourth lens is concave, and the image side is convex, and its optical focus is positive. On the other hand, the embodiment of the utility model also provides a camera module. The optical system and camera module of the embodiment of the utility model are mainly composed of four lenses, which are small in number, simple in structure, small in size, light in weight and low in cost. Different lenses are combined with each other and the focal degree is reasonably distributed, so they have good optical performance and are convenient to cooperate with the miniaturized on-board monitoring system for anti-fatigue driving.
【技术实现步骤摘要】
防疲劳驾驶用车载监控光学系统及其应用的摄像模组
:本技术涉及一种光学系统及其应用的摄像模组,尤其是一种防疲劳驾驶用车载监控光学系统及其应用的摄像模组。
技术介绍
:现有防疲劳驾驶用车载监控光学系统或摄像模组,普遍存在结构复杂,体积偏大,像素不高,总长偏长,成本偏高的问题,不利于预警系统的小型化。
技术实现思路
:为克服现有防疲劳驾驶用车载监控光学系统或摄像模组,普遍存在结构复杂,体积偏大的问题,本技术实施例提供了一种防疲劳驾驶用车载监控光学系统。一种防疲劳驾驶用车载监控光学系统,沿光轴从物面到像面依次包括:第一透镜、第二透镜、第三透镜、以及第四透镜;第一透镜的物面侧为凸面,像面侧为凹面,其光焦度为负;第二透镜的物面侧为凸面,像面侧为凹面,其光焦度为正;第三透镜的物面侧为凸面,像面侧为凸面,其光焦度为正;第四透镜的物面侧为凹面,像面侧为凸面,其光焦度为正。另一方面,本技术实施例还提供了一种摄像模组。一种摄像模组,至少包括光学镜头,光学镜头内安装有上述所述的防疲劳驾驶用车载监控光学系统。本技术实施例之光学系统和摄像模组,主要由4枚透镜构成,透镜枚数少,结构简单,体积小,重 ...
【技术保护点】
1.一种防疲劳驾驶用车载监控光学系统,沿光轴从物面到像面依次包括:第一透镜、第二透镜、第三透镜、以及第四透镜;其特征在于,第一透镜的物面侧为凸面,像面侧为凹面,其光焦度为负;第二透镜的物面侧为凸面,像面侧为凹面,其光焦度为正;第三透镜的物面侧为凸面,像面侧为凸面,其光焦度为正;第四透镜的物面侧为凹面,像面侧为凸面,其光焦度为正。
【技术特征摘要】
1.一种防疲劳驾驶用车载监控光学系统,沿光轴从物面到像面依次包括:第一透镜、第二透镜、第三透镜、以及第四透镜;其特征在于,第一透镜的物面侧为凸面,像面侧为凹面,其光焦度为负;第二透镜的物面侧为凸面,像面侧为凹面,其光焦度为正;第三透镜的物面侧为凸面,像面侧为凸面,其光焦度为正;第四透镜的物面侧为凹面,像面侧为凸面,其光焦度为正。2.如权利要求1所述的防疲劳驾驶用车载监控光学系统,其特征在于,镜头的焦距EFL与镜头总长TTL比值满足以下条件:2<TTL/EFL。3.如权利要求1或2所述的防疲劳驾驶用车载监控光学系统,其特征在于,光学系统的各透镜满足如下条件:(1)0.93<∣f1/f∣<2;(2)2<∣f2/f3∣;(3)4.5<∣f4/f∣;其中,f为整个光学系统的焦距,f1为第一透镜的焦距,f2为第二透镜的焦距,f3为第三透镜的焦距,f4为第四透镜的焦距。4.如权利要求1或2所述的防疲劳驾驶用车载监控光学系统,其特征在于,第一透镜的材料折射率Nd1、材料阿贝常数Vd1满足:1.48<Nd1<1.65,30<Vd1<72;第一透镜的焦距f1满足:0.93<∣f1/f∣<2,f为整个光学系统的焦距。5.如权利要求1或2所述的防疲劳驾驶用车载监控光学系统,其特征在于,第二透镜的材料折射率...
【专利技术属性】
技术研发人员:汪鸿飞,刘振庭,刘佳俊,刘洪海,宁博,陈波,杜亮,徐程,符致农,
申请(专利权)人:广东弘景光电科技股份有限公司,
类型:新型
国别省市:广东,44
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