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  • Why Use an Achromatic Lens?
    An achromatic lens consists of two optical components cemented together, usually a positive low-index (crown) element and a negative high-index (flint) element. The additional design freedom provided by using doublets allows for further optimization of performance not possible with singlets
  • System Design Relating to Lens Assemblies (.pdf)
    printed on either transparent glass or chromium-. plano-convex BK-7 uncoated lens (lens 2) and a (typically). coated microscope slides. The chromium surface has the. 150–200 mm fl, anti-reflection coated, achromatic doublet. advantage of being reflective (reflectivity $60%), which. (lens 3). These two
  • Focusing Objective Theory
    properties. to correct for chromatic aberrations. Achromatic Focusing. Aberration Correction. Objectives are aberration corrected at two wavelengths. A Bestform lens singlet is corrected for minimal spheri-. simultaneously. A doublet consisting of two lenses of differ-. cal aberration. However, other
  • Focusing Objective Theory (.pdf)
    properties. to correct for chromatic aberrations. Achromatic Focusing. Aberration Correction. Objectives are aberration corrected at two wavelengths. A Bestform lens singlet is corrected for minimal spheri-. simultaneously. A doublet consisting of two lenses of differ-. cal aberration. However, other
  • Fiber Optic Collimators
    into a single lens, either spherical or aspherical, their focal distances are different, often called chromatic aberration. Achromatic doublets are frequently used to reduce the effect. SINGLEMODE OR MULTIMODE: Singlemode fibers produce almost mathematically perfect Gaussian beams. A collimated Gaussian beam
  • Adaptive wavefront correction in two-photon microscopy using coherence-gated wavefront sensing
    ), and ND2 (1.7D, 371144; Linos, Göttingen, Germany), near-infrared achromatic doublets L1 (focal length 5 cm, NT45–803; Edmund Optics), L2 (focal length 8 cm, 322393; Linos), L3 (focal length 7.5 cm, AC254–075-B; Thorlabs, Newton, NJ), L4 (focal length 15 cm, AC254–150-B; Thorlabs), L5 (focal length

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