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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  3. Photomultiplier tube - Wikipedia

    en.wikipedia.org/wiki/Photomultiplier_Tube

    The caesium-antimony photocathode had a dramatically improved quantum efficiency of 12% at 400 nm, and was used in the first commercially successful photomultipliers manufactured by RCA (i.e., the 931-type) both as a photocathode and as a secondary-emitting material for the dynodes. Different photocathodes provided differing spectral responses.

  4. Geological structure measurement by LiDAR - Wikipedia

    en.wikipedia.org/wiki/Geological_structure...

    LiDAR system emits pulsed and continuous-wave lasers to acquire 3-D information. The laser scanner is the main component of LiDAR. Lasers with a wavelength of 550-600 nm are used on a ground-based system (handheld laser scanning and terrestrial laser scanning), whereas airborne systems use lasers with 1000-1600 nm wavelength. [19]

  5. Tennelec - Wikipedia

    en.wikipedia.org/wiki/Tennelec

    Tennelec also manufactured innovative scanning radios in the 1970s. The first programmable radio scanner was the Memoryscan from Tennelec Commercial Products Division, introduced in 1974, and later known as the Memoryscan 1 (model MS-1). [1] [2] This was followed by a slightly improved model, the Memoryscan 2 (model MS-2). Prior to the MS-1 and ...

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  7. Nanoprobe (device) - Wikipedia

    en.wikipedia.org/wiki/Nanoprobe_(device)

    A nanoprobe is an optical device developed by tapering an optical fiber to a tip measuring 100 nm = 1000 angstroms wide. Nanoprobes can be used in bioimaging to provide improved contrast and spatial resolution of cells and tissues. [1] Types of nanoprobes used for bioimaging include fluorescence, chemiluminescence, and photoacoustic imaging. [1]

  8. Fiber-optical thermometer - Wikipedia

    en.wikipedia.org/wiki/Fiber-optical_thermometer

    The principle of operation is based on the temperature dependence of the bandgap of GaAs. The GaAs crystal fixed on the tip of the fibre will be transparent at a wavelength above 850 nm. The position of the band edge is temperature-dependent and is shifted about 0.4 nm/K. The light is directed via the optical fibre to the crystal, where it is ...

  9. Spectronic 20 - Wikipedia

    en.wikipedia.org/wiki/Spectronic_20

    The Spectronic 20 is a brand of single-beam spectrophotometer, designed to operate in the visible spectrum [1] across a wavelength range of 340 nm to 950 nm, with a spectral bandpass of 20 nm. [ 2 ] [ 3 ] It is designed for quantitative absorption measurement at single wavelengths. [ 1 ]

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