Ccd Spectrograph
Ccd Spectrograph - Related Videos
06:06
A Simple Dewar/Cryostat for Thermally Equilibrating Samples at Known Temperatures for Accurate Cryogenic Luminescence Measurements
0 Views •
2016
A simple liquid nitrogen Dewar/cryostat apparatus comprised of a small fused silica optical Dewar, a thermocouple, and a charge-coupled device (CCD) spectrograph are described. The experiments for which this Dewar/cryostat is designed require fast sample loading, freezing, and alignment, accurate and stable sample temperatures, and small size/portability.
15:04
Rejection of Fluorescence Background in Resonance and Spontaneous Raman Microspectroscopy
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Cited by 5 •
2011
We discuss the construction and operation of a complex nonlinear optical system that uses ultrafast all-optical switching to isolate Raman from fluorescence signals. Using this system we are able to successfully separate Raman and fluorescence signals utilizing pulse energies and average powers that remain biologically safe.
12:42
Microfluidic Mixers for Studying Protein Folding
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Cited by 9 •
2012
In this work we explain the fabrication and use of a microfluidic mixer capable of mixing two solutions in ~8 μs. We also demonstrate the use of these mixers with spectroscopic detection using UV fluorescence and fluorescence resonance energy transfer (FRET).
08:53
Dependence of Laser-induced Breakdown Spectroscopy Results on Pulse Energies and Timing Parameters Using Soil Simulants
0 Views •
Cited by 3 •
2013
LIBS detection capabilities on soil simulants were tested using a range of pulse energies and timing parameters. Calibration curves were used to determine detection limits and sensitivities for different parameters. Generally, the results showed that there was not a significant reduction in detection capabilities using lower pulse energies and non-gated detection.
13:48
Non-contact, Label-free Monitoring of Cells and Extracellular Matrix using Raman Spectroscopy
0 Views •
Cited by 20 •
2012
Raman spectroscopy is a suitable technique for the non-contact, label-free analysis of living cells, tissue-engineered constructs and native tissues. Source-specific spectral fingerprints can be generated and analyzed using multivariate analysis.
FAQs
The slit provides a defined path for incoming radiation before it reaches the dispersive element. A diffraction grating then directs different wavelengths toward different locations on the CCD array rather than allowing them to overlap at one position. This spatial separation creates the measured spectrum and supports analysis of individual wavelength regions.
The CCD converts photon energy into electronic signals across an array of pixels. Because signal intensity varies from pixel to pixel, the recorded pattern preserves differences in light intensity across the separated wavelengths. This digital response allows a Ccd Spectrograph to support quantitative analysis rather than relying only on visual observation of a spectrum.
Spectral resolution determines how effectively the recorded pattern distinguishes nearby wavelength components. In this instrument, wavelength separation occurs before light reaches the CCD, so the detector can assign intensity values to separate pixel locations. Higher practical resolution enables more precise examination of spectral features, while the digital record supports repeatable comparison between measurements.
Emission measurements examine light produced by a source, whereas absorption measurements examine changes in light after it passes through an absorbing material or medium. The same wavelength-separation and CCD-recording principles can capture both types of signal. This flexibility makes the instrument useful for analyzing materials and chemical or environmental samples through different light responses.
A measurement begins by directing incoming radiation through the slit toward the dispersive element. The separated wavelengths then strike different CCD pixels, where photon energy becomes electronic signal. The resulting intensity pattern is recorded digitally as a spectrum and can be examined quantitatively. This workflow combines optical separation, detection, and rapid data acquisition in one measurement sequence.
Engineering applications include materials characterization, emission and absorption measurements, semiconductor inspection, and environmental or chemical sensing. In these settings, the recorded spectrum provides wavelength-specific intensity information that can support evaluation of materials, emitted or absorbed light, semiconductor-related systems, or sensed chemical and environmental conditions. Digital recording also promotes precise and repeatable measurement.