The utility model relates to a transient absorption spectrometer imaging system, which belongs to the field of optical detection technology, and specifically relates to a high time space-time resolution transient absorption spectrometer system based on inverted microscope. Including: beam splitter, located in the output light path of a femtosecond laser, used to distribute the beam of the femtosecond laser back to the probe optical path and the pump light path; the dual color filter is used to converge the probe optical path and the pump light path into a coaxial harness; the inverted microscope, under the carrier platform, is used to receive the shared axis. The wire harness converges on the sample; the CCD probe is used to receive the probe light from the coaxial beam that converges to the sample. Therefore, the utility model has the following advantages: 1. has the ability of high spatial resolution (the minimum resolution of 500nm wavelength laser reaches 260nm); and 2. the two-dimensional transient absorption imaging can be realized by scanning the microscope platform.
【技术实现步骤摘要】
基于倒置显微镜的高时空分辨瞬态吸收光谱仪成像系统
本技术涉及一种瞬态吸收光谱仪成像系统,属于光学检测
,具体涉及一种基于倒置显微镜的高时空分辨瞬态吸收光谱仪成像系统。
技术介绍
倒置显微镜又称反式显微镜。倒置显微镜组成和普通正置显微镜在光学成像原理上类似,均是通过物镜放大成像。不同在于结构设计上,前者物镜在载物台及样本之下,后者物镜在载物台之上。瞬态吸收是超快光谱学中研究激光与物质作用最重要的表征手段。瞬态吸收表征了探测光的吸收变化(ΔA吸收变化或者ΔT/T归一化透过变化)随泵浦光激发后的时间延迟的函数。其基本装置原理如图1所示,其满足如下关系:T代表探测光光透过样品的透过率(transmission),DT代表探测光透过率变化(DifferentialTransmission),T泵浦激发前代表泵浦光到达样品前,样品透过率。同理,T泵浦激发后代表泵浦光到达样品前,样品透过率。时间分辨率指时间分辨光谱学中,时序上区分光化学过程的最小响应时间。对于瞬态吸收而言,时间分辨率一般在短脉冲激光光源脉宽的1.0~1.7倍。空间分辨率指能够区分空间上样品形貌的最小响应距 ...
【技术保护点】
一种基于倒置显微镜的高时空分辨瞬态吸收光谱仪成像系统,其特征在于,包括:分束镜,位于飞秒激光器输出光路上,用于将飞秒激光器的光束分光后送至探测光路和泵浦光路;双色滤镜,用于将所述探测光路和泵浦光路汇聚成为共轴线束;倒置显微镜,位于载物台下方,用于将接收到的所述共轴线束汇聚于样品上;CCD探头,用于从汇聚于样品上的共轴线束中接收探测光。
【技术特征摘要】
1.一种基于倒置显微镜的高时空分辨瞬态吸收光谱仪成像系统,其特征在于,包括:分束镜,位于飞秒激光器输出光路上,用于将飞秒激光器的光束分光后送至探测光路和泵浦光路;双色滤镜,用于将所述探测光路和泵浦光路汇聚成为共轴线束;倒置显微镜,位于载物台下方,用于将接收到的所述共轴线束汇聚于样品上;CCD探头,用于从汇聚于样品上的共轴线束中接收探测光。2.根据权利要求1所述的一种基于倒置显微镜的高时空分辨瞬态吸收光谱仪成像系统,其特征在于,所述探测光路上沿光路前进方向依次设置参量放大器以及延迟平台;所述延迟平台内设置多个反射镜;所述探测光路的光经双色滤镜后方入...
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