Spatial and spectral resolution

Fig. 5.5.14 Schematic diagram showing how the double-phase encoded DEPT sequence achieves both spatial and spectral resolution within the reactor, (a) A spin-echo ]H 2D image taken through the column overlayed with a grid showing the spatial location within the column of the two orthogonal phase encoded planes (z and x) used in the modified DEPT sequence. The resulting data set is a zx image with a projection along y. In-plane spatial resol-ution is 156 [Am (z) x 141 [xm (x) for a 3-mm slice thickness. The center of each volume from which the data have been acquired is identified by the intersection of the white lines. The arrow indicates the direction of flow.

A schematic representation of how the double-phase encoded DEPT pulse sequence achieves spatial and spectral resolution within the fixed bed of ion-exchange resin is shown in Fig. 45. Typical data acquired in this experiment are shown in Fig. 46. The data were recorded from a vertical section through the center of the bed. The direction of superficial flow was from the bottom to the top of the bed. The spectra shown were recorded at regular intervals along the length of the bed, with a spatial separation of approximately 2.5 mm. With reference to Fig. 46, the... 

Important ongoing developments in HRTEM that are expected to be valuable in catalysis research include the correction of spherical aberrations in electron microscope lenses and monochromatization of the electron beam for improvement of the spatial and spectral resolution. Recently, scanning-TEM (STEM) of atomically dispersed lanthanum atoms on alumina (63) has provided e.x situ aberration-corrected images, but it is noteworthy that there is no technical limitation in applying the correction devices to instruments used for making measurements of samples in reactive environments. 

The speed of data acquisition in point mapping protocols generally precludes the examination of large sample regions at high spatial and spectral resolution. In addition to the usual trading rules of FTIR spectroscopy, there are tradeoffs in data... 

The spatial and spectral resolution of the SFD can be electronically varied by summing adjacent diodes in groups of 2,4,6,8, 10 etc. The diodes are read out (recharged) at very high rates, e.g., 2 MHz, but only the group-summed total... 

Filiberti, D. P., Marsh, S. E. Schowengerdt, R. A. (1994) Synthesis of imagery with high spatial and spectral resolution from multiple image sources. Optical Engineering 33, 2520-2528. 

SPATIAL AND SPECTRAL RESOLUTION OF A GERMANIUM STRIP DETECTOR... 

Germanium strip detectors are capable of providing excellent spatial and spectral resolution. Such devices are fabricated from planar germanium by cutting [5], etching [6], and photomask [7] techniques. In a two-dimensional detector, strips on opposite faces are orthogonal (Figure 1). 

Spatial and spectral resolution of a Germanium strip detectors R.A. Kroeger, W.N. Johnson, R.L. Kinzer, J.D. Kurfess, S. Inderhees, B. 

An interesting application of Raman spectroscopy in medicine is the in vivo detection of breast cancer [382]. This technique is very promising because the spatial and spectral resolution allows the localization of spots with a different molecular composition and is able to distinguish between benign and malign cancer cells. 

The performance of an imaging system for IFM depends on several parameters including the temporal, spatial, and spectral resolution, the imaging detector sensitivity (signal-to-noise ratio), and the image analysis hard and software used to quantify and document the results. 

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