Czerny-Turner monochromator

KW, 27.12MHz automatic Im Czerny-Turner monochromator impedance matching... 

Q. Name two ways of increasing the resolution of a Czerny-Turner monochromator. 

Figure 21 -25 A Cd line at 228.802 nm causes spectral interference with the As line at 228.812 nm in most spectrometers. With sufficiently high resolution, the two peaks are separated and there is no interference. The instrument used for this spectrum has a 1-m Czerny-Turner monochromator (Figure 20-5) with a resolution of 0.005 nm from 160 to 320 nm and 0.010 nm from 320 to 800 nm. [Courtesy Jobin Yvon Horiba Group. Longjumeau Cedex. France.]...

Luminescence Spectroscopy. Photoluminescence measurements were performed with the aid of a Fluorolog3 spectro-fluorometer Fl3—22 (Horibajobin Yvon) equipped with double Czerny—Turner monochromators, a 450 W xenon lamp and a R928P photomultiplier with a photon counting system. Cooling down to 10 K was achieved by a closed cycle He cryostat (Janis Research). All emission spectra were corrected for the photomultiplier sensitivity and all excitation spectra for the intensity of the excitation source. To avoid any contamination of water on the sample s surfaces, we carried out the measurements in silica ampules with extreme purity which show no luminescence of the ampules itself. Reflection spectra were recorded on a Cary 5000 UV—vis—NIR spectrophotometer (Varian), which were corrected for both the lamp intensity and the photomultiplier sensitivity. 

Czerny-Turner monochromators Two mirrors are used to reflect and focus the polychromatic and diffracted beams. Wavelengths are selected by using a computer to rotate the grating in various ways. This design is shown in Figure 6. As the grating rotates, a different wavelength is focused onto the exit slit. 

Figure 6 Czerny-Turner monochromator. ICP = inductively coupled plasma and PMT = photomultiplier tube. Reproduced from www.thespectroscopynet.com...

Spark discharge in argon using polychromator [408] Grimm-type glow discharge with 1 m Czerny-Turner monochromator [410] ... 

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