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Cathodoluminescence (CL)是透过电子轰击非金属材料产生的光放射，并通过高分辨的采集分光镜，得到阴极荧光影像及谱图，以深入研究光电子学和其他半导体材料学的精细成像仪器。CL是一种灵敏的成像和分析技术，为SEM （或TEM）提供许多重要科技材料的讯息, 例如,半导体、陶瓷和钻石的杂质，差排，缺陷和晶界的信息，CL 揭示了地质样品上成带 (Zonation) ，微裂痕和过成长现象。
ChromaCL使用高效的光采集和分散技术，提供高质量实时彩色阴极发射成像。
ChromaCL
Live Colour Cathodoluminescence Imaging in the Scanning Electron Microscope
ChromaCL™ is an unique product offering live colour cathodoluminescence (CL) imaging in the SEM. ChromaCL™ operates using the principles of efficient light collection from the specimen, dispersion onto an array detector, and live colour mixing of the channels which are measured simultaneously.
For specimens which luminesce at various wavelengths, ChromaCL™ provides a powerful imaging technique. The single scan colour image acquisition opens new doors to CL studies on geological specimens, beam sensitive materials and even biological applications, traditionally reliant on optical techniques.
ChromaCL™ uses DigiScan™, Gatan's powerful 2nd generation Digital Beam Control system for control of the scan and signal inputs.
ChromaCL™ is suitable for most SEMs and Microprobes with suitable port access, external scan control, and sufficient beam current to stimulate colourful CL in the specimen.
Quartz image using ChromaCL (above) - with the same sample viewed as an SE image below
Download
To download a PDF of the ChromaCL literature click here
ChromaCL™ is designed and manufactured with both user friendliness and flexibility in mind. Once the mirror is inserted to a set position, and the specimen is at the correct working distance, a single mouse click of the DigiScan™ search, preview, or record button is all that is needed to acquire a colour CL with an SE image.
For advanced users alternative dispersion, channel grouping and software mixing can be configured and applied to enhance the versatility of the technique and provide false colour imaging ideal for specific specimens.
Software
ChromaCL™ software allows the user to specify alternative signal inputs to colour mixing channels. In this way the software is flexible and the colour features are not limited to CL pulse maps. Colour channels can be ascribed to other suitable analogue or pulse inputs.
技术参数：
Specifications
ChromaCL
Diamond turned parabolic mirror plus light guide.
Magnification imaging from approx. x100 to resolution of technique.
Interface flange to microscope.
70mm retraction of mirror and light guide from set insertion position, with precision control of X,Y,Z, position.
Spectral transmission 300-800nm.
Adjustable, lockable tilt of dispersion grating.
Multi-alkali, multi-array PMT detector, dynode chain and HT supply, amplification and pulse discrimination electronics.
DigiScanII™, Digital Beam control platform. Configured to EM model with cabling. Includes 4 x TTL pulse detection inputs and high bit analogue input.
DigitalMicrograph™ software containing DigiScan™ and ChromaCL™ plug-ins.
Current specification PC with Firewire input., TFT screen and CDW
ChromaCL SP. Spectroscopy Option.
Integral fixed dipersion mini spectometer.
3648 element array
USB2 interface.
DigitalMicrograph plug-in allows control of acquisition, binning, integration and dark referencing.
Spectral response 300-850nm.
7.5nm spectral resolution.
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