Quartz prisms

Near-ultraviolet Deuterium discharge xenon arc Quartz Prism grating interferometer Photomultiplier photodiode photographic plate... 

Plot X against n and hence obtain the resolving power of a fused quartz prism, wifh a base length of 3.40 cm, at 200 nm, 250 nm, 300 nm and 350 nm. What is the resolution, in nanometres, at these wavelengths How would the resolving power and resolution be affected, quantitatively, by using two such prisms in tandem ... 

Visible and ultraviolet absorption spectra are measured in an absorption spectrometer. The source gives out intense visible light or ultraviolet radiation. The wavelengths can be selected with a glass prism for visible light and with a quartz prism or a diffraction grating for ultraviolet radiation (which is absorbed by glass). A typical absorption spectrum, that of... 

Monochromators. Replica gratings and narrow band-pass filters are used commonly, more so than quartz prisms. Computer control of the monochromator is available in some instruments, so that optimum intensity at the desired wavelength or maximum absorption by the examined substance can be obtained. 

Nonresonance Raman spectra of the alternating LB films were measured by a total reflection method shown in Figure 23. The films were deposited on quartz prisms. The s-polarized beam of 647.1 nm from a Kr laser was incident upon the interface between the quartz and film at an angle of 45° from the quarz side, and totally reflected. Raman line scattered from the film in the direction of 45° from the surface was measured through a Spex Triplemate by a Photometries PM512 CCD detector with 512x512 pixels operated at -125 °C. The spectral resolution was about 5 cm 1. 

Figure 24.4. (a) Emergence of two lines from a single Quartz Prism (V) Comu Type Prism-with two half-prisms-emergence of a single line. (RHP = Right Hand Polarization and LHP = Left Hand Polarization). 

It is interesting to observe that a typical large Littrow Spectrograph having a single Quartz prism covers a wavelength range from 2000 to 80000 A. 

Littrow quartz spectrograph spect A spectrograph in which dispersion is accomplished by a Littrow quartz prism with a rear reflecting surface that reverses the light a lens in front of the prism acts as both collimator and focusing lens. li,tro Ikworts spek-tr9,graf ... 

The output from a ruby giant-pulse laser (2 Joule, 30 nsec half-width, = 6943A) passes a KH2PO4 crystal where, due to the nonlinear characteristics of this material, the second harmonic at X = 3471 A is generated with an efficiency of 3 %.The two wavelengths are separated by means of a water filled quartz prism. The ultraviolet light pulse serves as pump pulse. 

A diagram of the author s original spectrofluorimeter is shown in Figure 3. The light source, S, was either a 1 kw. compact source mercury vapor lamp, or for the measurement of fluorescence excitation spectra, a 375 w. xenon arc. The required frequency of exciting light was isolated by means of a Hilger 1)247 quartz prism monochromator, Mj, and... 

Fig 5. Spectral sensitivity curves for quartz prism monochromator, (a) With EMI 6256 photomultiplier tube (6) with EMI 9558 Q photomultiplier tube. 

Spectral calibration curves for a t)247 quartz prism monochromator with either an EMI 6256 or 9558 photomultiplier are shown in Figure 5. Most of the spectra to be presented later have not been corrected but... 

Fig. 7. Diagram of spectrophosphorimeter.28 L, light source Mi, Ms, Hilger D 247 quartz prism monochromators Di, D2, chopper discs driven by synchronous motors B, silica plat beam splitter F, 0.5-mm. silica optical cell containing fluorescent screen solution Pi, monitoring photomultiplier P2, fluorescence-phosphorescence photomultiplier Q, fused quartz dewar containing sample cell.

Fig. 1. Schematic of experimental setup. %J2 - 800 nm wave-plate SP 2-mm sapphire plate PI, 2 45° quartz prisms P3 69° quartz prism, the distance from P3 to the NOPA crystal is 80 cm CM1, 2 ultrabroadband chirped mirrors GR 300 lines/mm ruled diffraction grating (Jobin Yvon) SM spherical mirror, R=-400 mm BS1, 2 chromium-coated d=0.5 mm quartz beam splitters. SHG crystal 0.4-mm 0=29° BBO (EKSMA) NOPA crystal 1-mm 0=31.5° BBO (Casix) SHG FROG crystal 0=29° BBO wedge plate d=5- -20 pm (EKSMA). Spherical mirrors around NOPA crystal are R=-200 mm Thick arrows on the left indicate the data flow from the pulse diagnostic setup (SHG FROG) and the feedback to the flexible mirror.

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