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  • Optical Touch Pointer for Fluorescence Guided
    -. Øcladding ¼ 640 mm, numerical aperture ¼ 0.37) and nine. bleaching effect during fiber optical measurements of. receiving fibers (Øcore ¼ 200 mm, Øcladding ¼ 240 mm, numer-. fluorescence spectra [13]. Another problem in many. ical aperture ¼ 0.22). The receiving fibers are matched to fit. applications
  • How Does A Spectrometer Work?
    . In monochromators the entrance and exit slits are in a fixed position and can be changed in width. Rotating the grating scans the spectrum. The development of micro-electronics during the 90’s in the field of multi-element optical detectors, such as Charged Coupled Devices (CCD) arrays
  • Introduction to Volume Holographic Gratings (VHG)
    to their high wavelength and angle sensitivity, and large information capacity and bandwidth, VHG's have been investigated intensively and developed for applications such as data storage, optical correlators, optical information encryption, fiber optic communication and spectroscopy. whitepaper-VHG.sxw
  • Spectroscopic Diagnostics of an Atmospheric Microwave Plasma
    A 1.5 kW, 2.45 GHz microwave sustained plasma in a flowing sample of stack exhaust. gas has been shown in recent DOE/EPA testing to be an accurate monitor of trace. hazardous metals (in the part per billion range) such as lead, chromium, and beryllium. Optical-UV spectroscopic studies are being
  • Introduction to reflective aberration corrected holographic diffraction gratings
    and included angle. The grating is the sole optical element in a concave grating design. The. light collection is determined by the f-number of the grating. F-number is the ratio of the grating focal length. divided by the grating diameter (clear aperture). Aberration correction (discussed later
  • Effect of environment on wood density
    successive rotations in the Usutu Forest, Swaziland. Commonwealth Forestry Review 75 (3): 234-239 Hughes, J.F. and Sardinha, R.M. de A. 1975. The application of optical densitometry in the study of wood structures and properties. J. Microsoc, 104(1), 91-103. International Organisation for Standards ISO

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