Confocal and Light Sheet Imaging
Optical imaging instrumentation can magnify tiny objects, zoom in on distant stars and reveal details that are invisible to the naked eye. But it notoriously suffers from an annoying problem: the…
声光调制在全光谱型激光共聚焦显微镜系统的应用
荧光最显著的特征是照射光(激发光)和检测光(发射光)颜色之间的偏移,称为斯托克斯位移。因此,在荧光成像中,不仅要将激发光和发射光的相应波长过滤出来,还需要将激发光从发射光中分离。过去,通常用平面光学元件,包括灰色或彩色滤光片和反射镜进行滤光和分光。虽然有多种平面光学元件可供使用,但固定的规格和低切换效率使其在使用上具有局限性,并且采用不同角度或梯度的涂层作为激发光和发射光的调谐方法也被证实并不可行…
Nobel Prize 2013 in Physiology or Medicine for Discoveries of the Machinery Regulating Vesicle Traffic
On October 7th 2013, The Nobel Assembly at Karolinska Institutet has decided to award The Nobel Prize in Physiology or Medicine 2012 jointly to James E. Rothman, Randy W. Schekman and Thomas C. Südhof…
Handbook of Optical Filters for Fluorescence Microscopy
Fluorescence microscopy and other light-based applications require optical filters that have demanding spectral and physical characteristics. Often, these characteristics are application-specific and…
光谱检测-如何设定特定探针发射光的光谱检测范围
为了拆分多色成像的发射光谱,首先由分束器或色散元件将不同颜色的光引入到不同的方向[1],带通滤片则能够最大限度地减少串色,并抑制所有残留的激发光,最终到达传感器。在过去,常使用的滤片是普通的玻璃带通滤片。如今,一项革命性的设计诞生了,那就是在多波段组件(SP探测器)中使用光度计滑块。该设计可以极为有效地探测发射光,同时提供完全可调谐性,与此同时带来的好处是使光谱扫描成为了可能。使用白激光作为光源时…
FRAP实验步骤式指南
漂白后荧光恢复(FRAP)已被认定为观察大分子平移扩散过程方面使用最为广泛的一种方法。由此产生的信息可用于确定动力学性质,如扩散系数、流动分数和荧光标记分子的传输速率。FRAP实验利用了短激光脉冲的荧光团辐照。先进的激光扫描显微镜如TCS…
Nobel Prize 2012 in Physiology or Medicine for Stem Cell Research
The Nobel Prize recognizes two scientists who discovered that mature, specialised cells can be reprogrammed to become immature cells capable of developing into all tissues of the body. Their findings…
Fluorescence Correlation Spectroscopy (FCS)
Fluorescence correlation spectroscopy (FCS) measures fluctuations of fluorescence intensity in a sub-femtolitre volume to detect such parameters as the diffusion time, number of molecules or dark…
白激光
在生物医学应用中,共聚焦显微镜的完美光源它应该有足够的强度,可调谐的波长,以便同时激发一系列样品。此外,它应该成为荧光寿命实验的脉冲光源。这样的光源已经出现:白激光。它采用高能脉冲红外光纤激光器经过光子晶体光纤以产生连续光谱。通过声光调制滤片从该连续光谱中选择窄带激光。