CN201514511U - 潜望式镜头结构 - Google Patents
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Abstract
一种潜望式镜头结构,其在反射棱镜的外围设置有多个压电组件,通过压电组件在不同电压大小产生不同的变形程度,得以数字化的控制反射棱镜的偏转角度,而能够补偿因手震而造成的光路不稳,使光信号稳定的落在影像感测组件上,进而达到防手震的目的。
Description
技术领域
本实用新型涉及一种镜头结构,特别是一种具有防手震功能的潜望式镜头结构。
背景技术
具有影像拍摄功能的手机、PDA以及数字相机等的影像撷取装置已日渐普及化,且带给人们相当多的便捷;目前,一种潜望式镜头的镜片组藏于影像撷取装置的机身中,且其作动方式为利用全反射棱镜将入射光线以垂直于光轴方向折射90度角后,再进入光学镜片组,并且通过光学镜片组以上下移动的方式调整焦距,此种潜望式镜头的设计无须将镜头突出于影像撷取装置的机身外,从而可大幅减少影像撷取装置的体积和厚度,致使整体外观更为轻薄短小,以提升影像撷取装置的便携性。
潜望式镜头的影像撷取装置对振动极为敏感,在拍摄时,由于手抖动使得光信号通过镜头后在影像感测组件上的成像的移动,导致成像模糊。常见的防震方式是在镜头中专门设置防震的补偿镜组,依据震动的方向与程度使补偿镜组相应地调整位置与角度,从而使光路保持稳定。然而这种防震方式需设置专门的补偿镜组,因此增加了影像撷取装置的体积与重量,不利于产品微型化的设计趋势。
实用新型内容
本实用新型提出一种潜望式镜头结构的实施例,其通过压电组件受到不同的电压时,产生不同的变形程度,从而控制全反射棱镜的偏转角度以补偿因手震而造成的光路不稳,于是可精确地使光信号稳定的落在影像感测组件上,达到防手震的目的。
本实用新型所提出的潜望式镜头结构的实施例包括:光学镜片组,其至少包含一个透镜并沿光轴设置;影像感测组件,其设置于光学镜片组下方;反射组件,可活动地设置于光学镜片组上方,用以将光信号传导至光学镜片组的光轴上,且在影像感测组件上成像;以及防手震装置,包含至少三组分配设置于反射组件周边的压电组件;以及电性连接压电组件的控制机构,其侦测手的震动程度以施加对应电压于压电组件,用以控制反射组件的偏转角度。
附图说明
图1所示为根据本实用新型一实施例的潜望式镜头结构的示意图。
图2所示为根据本实用新型一实施例的四组压电组件设置于全反射棱镜的示意图。
图3所示为根据本实用新型一实施例的潜望式镜头结构的应用示意图。
主要组件符号说明
10 潜望式镜头结构
12 光学镜片组
121、121’ 透镜
13 光轴
14 影像感测组件
16 全反射棱镜
161 反射镜
18、 压电组件
18A、
18B、
18C、18D
20 光信号
22 窗口透镜
θ 倾斜角度
具体实施方式
图1所示为根据本实用新型一实施例的潜望式镜头结构的示意图。潜望式镜头结构可应用于独立的数字相机或其它电子设备中的照相模块,如手机中的照相模块。本实施例的潜望式镜头结构10包含光学镜片组12、影像感测组件14、反射组件及防手震装置。在此实施例中,反射组件为全反射棱镜16;防手震装置包含多个压电组件18(包含18A、18B)及控制机构(图中未示)。
在一实施例中,光学镜片组12包含二组透镜121、121’且延光轴13设置,影像感测组件14设置于光学镜片组12的下方,且与光学镜片组12设置于同一光轴13上,影像感测组件14可为CMOS影像传感器或CCD影像传感器;全反射棱镜16可活动地设置于光学镜片组12的上方,且全反射棱镜16的反射镜161与光学镜片组12的光轴13呈45度斜角,用以接收光并将光传导至光学镜片组12的光轴方向。
接续上述说明,多个压电组件18配置于全反射棱镜16的周边,在本实施例中,多个压电组件18设置于全反射棱镜16的反射镜161的外侧面,其中反射镜161的内侧面为反射面,反射镜161四边形,如图2所示。本实施例使用四组压电组件18分别配置于反射镜161的周边的四个角落,压电组件18与控制机构电性连接,控制机构侦测相机的水平左右与垂直上下的手震动的程度,施加相应电压到至少部分组压电组件18,而使压电组件18因逆压电效应(Converse piezoelectriceffect)所造成的形状变化的效应,推动全反射棱镜16而得以控制其偏转角度。
在本实施例中,将四组压电组件18分别标示为18A、18B、18C及18D,定义压电组件18A、18C及压电组件18B、18D两两为水平左右方向排列,压电组件18A、18B及压电组件18C、18D两两为垂直上下方向排列;在无手震的正常状态下,如图1所示,压电组件18A、18B、18C、18D保持原状,其中附图仅绘制出压电组件18A、18B,则光信号20由窗口透镜22进入并且经全反射棱镜16弯折90度后进入光学镜片组12,并通过光学镜片组12调整焦距后在影像感测组件14上成像。
当相机因手震而垂直上下振动时,影像感测组件14的影像产生垂直抖动,则控制机构启动压电组件18A、18C为一组,压电组件18B、18D为另一组,如图3所示,使压电组件18A、18C的形状伸长,而压电组件18B、18D保持原状或稍微伸长,图中可知压电组件18A、18C比压电组件18B、18D具有更大的伸长量;为说明方便,本实施假设只有垂直上下振动,故仅绘制出压电组件18A及压电组件18B,至于压电组件18C及压电组件18D则分别与压电组件18A及压电组件18B对应作动。在本实施例中,此种压电组件18A、18B、18C、18D的变形组合使得全反射棱镜16倾斜角度θ,该倾斜角度θ恰能补偿手震导致的光路偏移,使光精确稳定地沿光学镜片组12的光轴13方向前进,因此能够稳定的成像在影像感测组件14上;同理,当相机因手震而水平左右振动时,控制机构启动压电组件18A、18B为一组,压电组件18C、18D为另一组,控制全反射棱镜16旋转角度,使光能够稳定的成像在影像感测组件14上。利用控制机构侦测垂直上下与水平左右的震动,产生相对应的电压到不同的压件组件18A、18B、18C、18D上,即可补偿任何偏转角度(包含倾斜角度或旋转角度)的偏移,达到完全防震的功效。
其中,压电组件的材料为压电陶瓷且个数并无限制,在其它实施例中,压电组件的个数仅需为三个以上即可;控制机构依据压电组件的材料与个数调整电压的权重,以适当地电压制压在电组件上,完全地控制反射组件的倾斜角度与旋转角度。
另外,根据光线的全反射特性,当全反射棱镜偏转一角度时,光路将产生两倍的角度偏移,即在影像感测组件上,影像会产生较大的位移量,因此本实用新型的防手震装置可在较小的全反射棱镜的偏转角度调整下获得较高倍的影像位置控制。
综上所述,本实用新型通过压电组件受电压的大小而控制其变形程度的特性,控制反射组件的偏转角度,以补偿因手震而造成的光路不稳,使光信号稳定的落在影像感测组件上,进而达到防手震的目的。
以上所述的实施例仅为说明本实用新型的技术思想及特点,其目的在使本领域技术人员能够了解本实用新型的内容并据以实施,当不能此的限定本实用新型,即凡是依本实用新型所公开的精神所作的等效变化或修饰,仍应涵盖在本实用新型的权利要求内。
Claims (6)
1.一种潜望式镜头结构,其特征在于,包括:
一光学镜片组,至少包含一个透镜并沿一光轴设置;
一影像感测组件,设置于所述光学镜片组下方;
一反射组件,可活动地设置于所述光学镜片组上方,用以将一光信号传导至所述光学镜片组的所述光轴上,并且在所述影像感测组件上成像;以及
一防手震装置,包含:
至少三个组压电组件,分配设置于所述反射组件周边;以及
一控制机构,其电性连接所述些压电组件,侦测手震动的程度以施加对应电压到所述些压电组件,用以控制所述反射组件的一偏转角度。
2.如权利要求1所述的潜望式镜头结构,其特征在于,所述反射组件为一全反射棱镜。
3.如权利要求1所述的潜望式镜头结构,其特征在于,所述反射组件包含一反射镜,该反射镜呈四边形。
4.如权利要求3所述的潜望式镜头结构,其特征在于,所述些压电组件分别设置于所述反射镜的一外侧面的四个角落。
5.如权利要求3所述的潜望式镜头结构,其特征在于,所述反射镜与所述光学镜片组的所述光轴呈45度斜角。
6.如权利要求1所述的潜望式镜头结构,其特征在于,所述些压电组件的材料为压电陶瓷。
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