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  • Natural Lenses in Space Stretch Hubble's View of the Universe
    The NASA Hubble Space Telescope serendipitous survey of the sky has uncovered exotic patterns, rings, arcs and crosses that are all optical mirages produced by a gravitational lens, nature's equivalent of having giant magnifying glass in space. A gravitational lens is created when the gravity
  • Hubble Discovers New Class of Gravitational Lens for Probing the Structure of the Cosmos
    NASA's Hubble Space Telescope has discovered a new distant class of quadruple, or cross-shaped, gravitational lenses which might eventually provide astronomers with a powerful new "magnifying glass " for probing a variety of characteristics of the universe: the distribution of dark matter
  • NASA's Hubble Space Telescope Uses a Distant Gravitational Lens to Explore the Cosmos
    billion light-years away. The gravity of the galaxy cluster acts as a natural "magnifying glass, " bending and focusing the light of the distant galaxy into several images each of which is enlarged and made brighter than would otherwise be the case. This rare combination of Hubble's powerful telescope
  • Gravitational Lens Helps Hubble and Keck Discover Galaxy Building Block
    billion years as the age of the universe). The discovery was made possible by examining small areas of the sky viewed through massive intervening clusters of galaxies. These act as a powerful gravitational lens, magnifying distant objects and allowing scientists to probe how galaxies assemble at very
  • MICRO: Spotlight
    with contact-angle measurement to evaluate wafer surface conditions. Included is a high-resolution camera and magnifying lens with high-intensity LED lighting for precise image capture. (S.F., North Hall, Booth 5160) designs and manufactures x-ray-based tools for the semiconductor manufacturing industry
  • Hubble Reopens Its Eye on the Universe
    Scanning the heavens for the first time since the successful December 1999 servicing mission, NASA's Hubble Space Telescope has imaged a giant, cosmic magnifying glass, a massive cluster of galaxies called Abell 2218. This "hefty " cluster resides in the constellation Draco, some 2 billion

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  • The Slit Lamp
    A telescopic lens is based on a telescope and an object-side magnifying lens .
  • Transmission Electron Microscopy
    In equation 1.1, l is the wavelength of the radiation, m the refractive index of the viewing medium, and b the semi-angle of collection of the magnifying lens .
  • Lateral magnification matrix from the dioptric power matrix formalism in the paraxial case
    This situ- ation corresponds with a magnifying lens providing a (vir- tual) direct image (M > 0) with a size that doubles the object (|M| = 2).
  • Science of Microscopy
    Recent commercial spectrometers have more complex optics (better focusing capability and aberration correction of the magnification lenses ), new scintillator materials with improved transfer function, and improved transfer of the generated light between the scintillator and detector.
  • Handbook Of Biological Confocal Microscopy
    The actual test is to use the galvanometers at the very small scan angles appropriate to high-NA, low- magnification lenses .
  • CR4 - Thread: Outdoor Magnifying Lens for U.S. Government Project
    Outdoor Magnifying Lens for U.S. Government Project .
  • The Undistort Lens
    For example, magnification lenses can be placed on .
  • The Glaucoma Book
    In clinical practice, the optic disc and RNFL are routinely assessed through either direct ophthalmoscopy or fundus bio- microscopy using high magnification lens (e.g., Volk 78D).
  • Strong biases in infrared-selected gravitational lenses
    The upper panels show the SLEDs for high- magnification lenses with � > 10, while the lower panels show the SLEDs for more moderate magnifications of 2 < � < 5; only a random sparse sample of 2 (10) percent of the lens configurations are �
  • High Speed Photomicrography
    � of field, exposure efficiency, working distance, and required exposure time are all reduced as optical magnification is increased, which severely taxes the skill and ingenuity of workers interested in recording any fast moving phenomena through the micro- scope or with magnifying lenses .