CN109343243A - 光调制装置、单通道光谱检测系统 - Google Patents
光调制装置、单通道光谱检测系统 Download PDFInfo
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- CN109343243A CN109343243A CN201811365960.2A CN201811365960A CN109343243A CN 109343243 A CN109343243 A CN 109343243A CN 201811365960 A CN201811365960 A CN 201811365960A CN 109343243 A CN109343243 A CN 109343243A
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- light
- guide plate
- light guide
- optic modulating
- modulating device
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- Mathematical Physics (AREA)
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- General Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Theoretical Computer Science (AREA)
- Engineering & Computer Science (AREA)
- Geometry (AREA)
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Abstract
本发明提供一种光调制装置、单通道光谱检测系统,属于液晶光学技术领域。本发明的光调制装置包括:导光板;色散组件,用于将光源所发射出的光线分散为多种不同波长的光线,并将所述不同波长的光线以不同角度衍射至所述导光板中;动态滤波组件,用于根据待检测的微流体的种类,选择不同波长中特定波长的光线经由所述导光板出射,并将剩余波长的光线从导光板中滤除。
Description
技术领域
本发明属于液晶光学技术领域,具体涉及一种光调制装置、单通道光谱检测系统。
背景技术
现有技术中,光谱检测装置具有多个位置固定的出光口,每个出光口对应设置有一个微流体通道,用以向该通道出射一种波长的光线。也就是说,在使用该光谱检测装置检测某种微流体时,需控制该微流体在多个通道上发生移动,以使该微流体到达与其相对应的通道中,该操作步骤繁琐,且目前微流体在多通道上流经路线的精准控制上仍存在问题,从而导致最终的检测结果不准确。
发明内容
本发明旨在至少解决现有技术中存在的技术问题之一,提供一种特定波长的光线动态可调的光调制装置、单通道光谱检测系统。
解决本发明技术问题所采用的技术方案是一种光调制装置,包括:
导光板;
色散组件,用于将光源所发射出的光线分散为多种不同波长的光线,并将所述不同波长的光线以不同角度衍射至所述导光板中;
动态滤波组件,用于根据待检测的微流体的种类,选择不同波长中特定波长的光线经由所述导光板出射,并将剩余波长的光线从导光板中滤除。
优选的是,所述动态滤波组件包括:多个间隔设置的光栅组件和液晶单元,所述液晶单元与所述光栅组件交替设置;其中,
每个所述液晶单元包括相对设置的第一电极和第二电极,以及夹设在所述第一电极和所述第二电极之间的液晶分子,所述第一电极和所述第二电极用于根据其上被施加的电压,控制所述液晶分子的偏转角度,以使所述导光板仅出射所述特定波长的光线。
优选的是,各个所述第一电极为一体成型结构;各个所述第二电极为一体成型结构。
优选的是,所述光栅组件的折射率等于所述液晶分子长轴的折射率。
优选的是,还包括:光吸收层,其设置在所述动态滤波组件远离所述导光板的一侧,用于吸收被滤除的所述剩余波长的光线。
优选的是,所述导光板具有相对设置的第一侧面、第二侧面;
所述动态滤波组件设置在所述第一侧面上,所述色散组件设置在所述第二侧面的一端。
优选的是,所述色散组件与所述动态滤波组件设置在所述导光板的同一侧面上。
解决本发明技术问题所采用的技术方案是一种单通道光谱检测系统,包括上述的任意一种光调制装置,以及检测装置;
所述检测装置位于光调制装置的出射特定波长的光线的一侧,用于检测经过微流体的、所述特定波长的光线。
优选的是,所述检测装置包括:分别设置在导光板两相对侧的光线衍射组件、检测组件;
所述光线衍射组件用于将导光板内传播的特定波长的光线准直出射至所述微流体上;
所述检测组件用于检测经过所述微流体的特定波长的光线。
优选的是,所述检测装置还包括:保护层,其覆盖所述光线衍射组件,用于保护所述光线衍射组件。
附图说明
图1为本发明的实施例的单通道光谱检测系统的结构示意图之一;
图2为本发明的实施例的单通道光谱检测系统的结构示意图之二;
图3为本发明的实施例的色散组件将白光光源所发射出的光线分散为多种不同波长的光线的示意图;
图4为本发明的实施例的动态滤波组件的示意图;
图5为本发明的实施例的单通道光谱检测系统的结构示意图之三;
图6为本发明的实施例的光线衍射组件对特定波长的光线进行衍射的示意图;
其中附图标记为:1、光源;2、色散组件;3、导光板;41、第一电极;42、液晶分子;43、光栅组件;44、第二电极;45、第一配向层;46、第二配向层;5、保护基板;6、光吸收层;7、衍射组件;8、保护层;9、微流体;10、第一疏水层;11、检测组件;12、承载基板;13、第二疏水层。
具体实施方式
为使本领域技术人员更好地理解本发明的技术方案,下面结合附图和具体实施方式对本发明作进一步详细描述。
除非另外定义,本发明使用的技术术语或者科学术语应当为本发明所属领域内具有一般技能的人士所理解的通常意义。本发明中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性,而只是用来区分不同的组成部分。“包括”或者“包含”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同,而不排除其他元件或者物件。“上”、“下”、“左”、“右”等仅用于表示相对位置关系,当被描述对象的绝对位置改变后,则该相对位置关系也可能相应地改变。
实施例1:
本实施例提供一种光调制装置,包括:导光板3,色散组件2,动态滤波组件;其中,色散组件2用于将光源1所发射出的光线分散为多种不同波长的光线,并将不同波长的光线以不同角度衍射至导光板3中;动态滤波组件用于根据待检测的微流体9的种类,选择不同波长中特定波长的光线经由导光板3出射,并将剩余波长的光线从导光板3中滤除。
由于本实施例所提供的光调制装置包括动态滤波组件,其能够根据待检测微流体9的种类,仅选择不同波长中特定波长的光线经由导光板3出射至该微流体9上,并将非特定波长的光线从导光板3中滤除,从而实现本实施例的光调制装置所出射的特定波长的光线动态可调。
其中,在以下实施例中,以光源1为白光光源,色散组件2对该白光光源进行分散作用,以得到的不同波长的光线分别为红光、绿光、蓝光为例进行说明。当然,本实施例中的光源1还可以为宽光谱单色光,在此不做限定。
假设特定波长的光线为红光,剩余波长的光线为绿光、蓝光。
具体的,以下对本实施例的光调制装置的结构进行具体说明。
其中,作为本实施例的第一种优选方式,如图1所示,沿导光板3的高度方向,本实施例的导光板3具有相对设置的第一侧面、第二侧面;其中,动态滤波组件设置在第一侧面上,色散组件2设置在第二侧面的一端(如图1所示,色散组件2设置在第二侧面的左端)。
具体的,动态滤波组件包括:多个间隔设置在导光板3的第一侧面上的光栅组件43和液晶单元,液晶单元与光栅组件43交替设置。其中,每个液晶单元包括相对设置的第一电极41和第二电极44,以及夹设在第一电极41和第二电极44之间的液晶分子42,第一电极41和第二电极44用于根据其上被施加的电压,控制液晶分子42的偏转角度,以使导光板3仅出射红光。其中,光栅组件43的折射率等于液晶分子长轴的折射率。
其中,本实施例优选的,各个第一电极41为一体成型结构;各个第二电极44为一体成型结构。该种结构设置能够简化本实施例的光调制装置的制备工艺。
应当理解的是,前述的每个液晶单元还设置有:第一配向层45和第二配向层46。具体的,如图1所示,第一配向层45设置在第一电极41与液晶分子42之间,第二配向层46设置在第二电极44与液晶分子42之间,二者相互配合,用以调整位于二者之间的液晶分子42的排列方式。进一步地,为使本实施例的液晶单元结构更加简单,各个第一配向层45为一体成型结构,各个第二配向层46为一体成型结构。
其中,本实施例优选的,光调制装置还设置有光吸收层6,其设置在动态滤波组件远离导光板3的一侧,用于吸收被滤除的非特定波长的光线。其中,光吸收层6可以为黑矩阵;当然,光吸收层6也可以为其他的吸光膜层,在此不做限定。
进一步优选的,如图1所示,在本实施例的导光板3的第三侧面上也设置有光吸收层6。其中,此处的第三侧面是指:位于导光板3的第一侧面与第二侧面之间,且靠近色散组件2的侧面。
需要说明的是,为避免因光吸收层6与动态滤波组件直接接触所导致的,影响该动态滤波组件的滤波功效的情况的发生,优选的,光吸收层6与动态滤波组件之间设置有保护基板5。其中,该保护基板5可以为玻璃基板。
其中,作为本实施例的第二种优选方式,如图2所示,色散组件2与动态滤波组件设置在导光板3的同一侧面上。
在此需要说明的是,事实上,本优选方式的光调制装置与前述的第一种优选方式的光调制装置的结构相同,特别的是,本优选方式的色散组件2与动态滤波组件是设置在导光板3的同一侧面,例如图2所示的,二者均位于导光板3的下侧面。这样一来,当色散组件2将白光光源所发射出的光线分散为红光、绿光、蓝光之后,这三个颜色的光线均需在导光板3中完成一次全反射之后,才会被动态滤波组件进行滤波处理,在此不再赘述。
为便于清楚地理解本实施例的意图,以下对本实施例的光调制装置的工作原理进行具体说明。
第一步、将光源1所发射出的光线分散为多种不同波长的光线,并将不同波长的光线以不同角度衍射至导光板3中。
具体的,本实施例的色散组件2可以由多个间隔设置的光栅结构所组成,这样一来,当白光光源准直照射在该色散组件2上时,其能够将白光光源所发射出的光线分散为具有不同波长的红光、绿光、蓝光。而且,如图3所示,根据光栅结构的波长敏感特性,即n1sinθ1-n2sinθ2=mλ/P(其中,n1为入射光所在介质的折射率;n2为衍射光线所在介质的折射率,此处即为导光板3的折射率;θ1为准直光线相对于色散组件2的入射角;θ2为衍射光线在导光板3内的衍射角;m为衍射级次,其通常为+1级或-1级;λ为光线的波长;P为光栅结构的周期)可以看出:在色散组件2将具有不同波长的红光、绿光、蓝光衍射至导光板3中时,由于红光、绿光、蓝光具有不同波长λ,故三者在导光板3内将具有不同的衍射角θ2,也即本实施例的色散组件2还能够将不同波长的红光、绿光、蓝光以不同角度衍射至导光板3中。
其中,本实施例的色散组件2中的光栅结构的材料包括氮化硅、二氧化硅、负性光刻胶、树脂、金属中的任意一种;该光栅结构的形状包括台阶光栅、倾斜光栅、全息光栅中的任意一种。
第二步、根据待检测的微流体9的种类,选择不同波长中特定波长的光线经由导光板3出射,并将剩余波长的光线从导光板3中滤除。
其中,本实施例以红光为与待检测微流体9相对应的特定波长的光线为例,相应的,绿光、蓝光即为本实施例的剩余波长的光线。
具体的,通过向第一电极41与第二电极44施加电压,以控制液晶分子42发生偏转,从而使得该液晶分子42的长轴垂直于红光(也即图4中所示的、波长为λI的光线)的传播方向,此时,根据液晶分子42对照射在其上的光线的折射率公式(其中,ne为液晶分子42对照射在其上的光线的折射率;n//为液晶分子42的长轴折射率;n⊥为液晶分子42的短轴折射率;θ为不同波长的光线的传播方向与液晶分子42的长轴之间的夹角,具体可如图4所示)可以得到:ne=n//,也即液晶分子42对照射在其上的红光的折射率等于该液晶分子长轴的折射率。而由于液晶分子长轴的折射率等于光栅组件43的折射率,故液晶分子42对照射在其上的红光的折射率也等于光栅组件43的折射率,此时,光栅组件43将无法对红光进行衍射,从而使得红光能够在导光板3中一直做全反射运动,直至其从导光板3中射出为止。
相应的,由于不同波长的红光、绿光、蓝光是以不同角度衍射至导光板3中,且在导光板3中,红光的传播方向垂直于液晶分子42的长轴,故绿光、蓝光(也即图4中所示的、波长为λII的光线)的传播方向均与液晶分子42的长轴不垂直。此时,根据上述的液晶分子42对照射在其上的光线的折射率公式可以得到:液晶分子42对照射在其上的绿光的折射率不等于液晶分子长轴的折射率,也即液晶分子42对照射在其上的绿光的折射率与光栅结构的折射率存在一定的差值,此时,光栅组件43会起到衍射作用,也即该光栅结构会将绿光从导光板3中滤除,以被光吸收层6所吸收掉。同理,光栅结构也会将红光从导光板3中滤除,以使导光板3仅向外出射红色光线。
直至完成使用本实施例的光调制装置仅出射红光的步骤。
综上,本实施例所提供的光调制装置包括动态滤波组件,其根据待检测微流体9的种类,向第一电极41与第二电极44施加不同的电压,以控制液晶分子42具有不同的偏转角度,其中,每一种偏转角度的液晶分子42与一种特定波长的光线相对应,从而使得在该种偏转角度的液晶分子42的作用下,仅有与其相对应的特定波长的光线会从导光板3中滤除至微流体9上,以实现从导光板3中所出射的特定波长的光线动态可调。
实施例2:
如图5、6所示,本实施例提供一种单通道光谱检测系统,其包括实施例1所提供的光调制装置,以及检测装置;其中,该检测装置位于光调制装置的出射特定波长的光线的一侧,用于检测经过微流体9的、特定波长的光线。
由于本实施例的单通道光谱检测装置包括实施例1的光调制装置,该光调制装置能够根据待检测微流体9的种类,向外出射与该微流体9相对应的特定波长的光线,因此,当需要使用本实施例的单通道光谱检测系统对某种微流体9进行检测时,只需将微流体9放置在一个微流体9通道上,并控制光调制装置向该微流体9出射与其相对应的特定波长的光线即可,从而省去了现有技术中,对某种微流体9进行检测时,需要驱动微流体9在多个微流体9通道上移动,以到达出射有与其相对应的特定波长的光线的通道中的步骤。由此可以看出,采用本实施例的单通道光谱检测装置对微流体9进行检测的步骤简单,检测结果精准。同时,由此还可以看出:本实施例中的单通道光谱检测装置仅设置一个微流体9通道即可对不同种类的微流体9进行检测,该结构简单,可落地化程度高。
其中,本实施例优选的,检测装置包括:分别设置在导光板3两相对侧的光线衍射组件7、检测组件11;其中,光线衍射组件7用于将导光板3内传播的特定波长的光线准直出射至微流体9上;检测组件11用于检测经过微流体9的特定波长的光线。
也就是说,在使用本实施例所提供的单通道光谱检测系统对微流体9进行检测时,需要先使用光线衍射组件7将导光板3内传播的特定波长的光线准直出射至微流体9上,然后再控制检测组件11对经过微流体9的特定波长的光线进行检测,以得到待检测微流体9的性能。其中,此处的性能可以为微流体9的浓度、吸光度等等,在此不做限定。
其中,本实施例的检测组件11可以为光学传感器,该光学传感器能够将其所接收到的、经过微流体9的特定波长的光线的光信号转换为相应的电信号,此时,可以通过对电信号进行分析,以对微流体9的性能进行检测。其中,该光学传感器可以为CCD、CMOS、PIN中的任意一种,当然,本实施的检测组件11还可以为其他的传感器,在此不做限定。
进一步优选的,如图6所示,检测组件11背离导光板3的一侧设置有承载基板12,该承载基板12用于支撑检测组件11。
其中,本实施例优选的,检测装置还包括:保护层8,其覆盖光线衍射组件7,用于保护光线衍射组件7。由于该保护层8是覆盖在光线衍射组件7表面的,故为避免保护组件对光线衍射组件7的衍射作用,该保护层8应以较低折射率的材料进行制备。
应当理解的是,为了保证微流体9在微流体9通道上的无损流动,优选的,本实施例的检测装置还包括相对设置的第一疏水层10、第二疏水层13;其中,第一疏水层10与第二疏水层13之间的区域即为本实施例的、用于承载微流体9的单通道。
综上,由于本实施例的单通道光谱检测系统包括实施例1所提供的光调制装置,该光调制装置能够根据待检测微流体9的种类,动态调整其所出射的特定波长的光线,这样一来,本实施例的单通道光谱检测系统仅设置一个微流体9通道即可对不同种类的微流体9进行检测,从而使得本实施例所提供的单通道光谱检测系统结构简单,可落地化程度高。
可以理解的是,以上实施方式仅仅是为了说明本发明的原理而采用的示例性实施方式,然而本发明并不局限于此。对于本领域内的普通技术人员而言,在不脱离本发明的精神和实质的情况下,可以做出各种变型和改进,这些变型和改进也视为本发明的保护范围。
Claims (10)
1.一种光调制装置,其特征在于,包括:
导光板;
色散组件,用于将光源所发射出的光线分散为多种不同波长的光线,并将所述不同波长的光线以不同角度衍射至所述导光板中;
动态滤波组件,用于根据待检测的微流体的种类,选择不同波长中特定波长的光线经由所述导光板出射,并将剩余波长的光线从导光板中滤除。
2.根据权利要求1所述的光调制装置,其特征在于,所述动态滤波组件包括:多个间隔设置的光栅组件和液晶单元,所述液晶单元与所述光栅组件交替设置;其中,
每个所述液晶单元包括相对设置的第一电极和第二电极,以及夹设在所述第一电极和所述第二电极之间的液晶分子,所述第一电极和所述第二电极用于根据其上被施加的电压,控制所述液晶分子的偏转角度,以使所述导光板仅出射所述特定波长的光线。
3.根据权利要求2所述的光调制装置,其特征在于,各个所述第一电极为一体成型结构;各个所述第二电极为一体成型结构。
4.根据权利要求2所述的光调制装置,其特征在于,所述光栅组件的折射率等于所述液晶分子长轴的折射率。
5.根据权利要求1所述的光调制装置,其特征在于,还包括:光吸收层,其设置在所述动态滤波组件远离所述导光板的一侧,用于吸收被滤除的所述剩余波长的光线。
6.根据权利要求1所述的光调制装置,其特征在于,所述导光板具有相对设置的第一侧面、第二侧面;
所述动态滤波组件设置在所述第一侧面上,所述色散组件设置在所述第二侧面的一端。
7.根据权利要求1所述的光调制装置,其特征在于,所述色散组件与所述动态滤波组件设置在所述导光板的同一侧面上。
8.一种单通道光谱检测系统,其特征在于,包括:权利要求1-7中的任一所述的光调制装置,以及检测装置;
所述检测装置位于光调制装置的出射特定波长的光线的一侧,用于检测经过微流体的、所述特定波长的光线。
9.根据权利要求8所述的单通道光谱检测系统,其特征在于,所述检测装置包括:分别设置在导光板两相对侧的光线衍射组件、检测组件;
所述光线衍射组件用于将导光板内传播的特定波长的光线准直出射至所述微流体上;
所述检测组件用于检测经过所述微流体的特定波长的光线。
10.根据权利要求9所述的单通道光谱检测系统,其特征在于,所述检测装置还包括:保护层,其覆盖所述光线衍射组件,用于保护所述光线衍射组件。
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