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  • Cylindrical Lenses
    As the name suggests, a cylindrical lens is an optical lens with a cylindrical or semi-cylindrical shape. Like a spherical lens, a cylindrical lens has one curved and one flat side. Unlike a spherical lens, however, cylindrical lenses aren't fully symmetrical - the orientation of a cylindrical lens
  • Choosing the Correct Eyepiece
    plano-convex lenses with both plano surfaces facing the eye. These offer lateral color correction and diminished coma for a flat field. Not typically used with a reticle because the image plane is between the two lenses. Often used in economical systems.
  • Diffraction, Fourier Optics and Imaging - Preface
    as a flat lens. Chapter 16 is a continuation of Chapter 15, and covers new methods of coding. DOEs and their further refinements. The method of projections onto convex sets. (POCS) discussed in Chapter 14 is used in several ways for this purpose. The. methods discussed are virtual holography, which makes

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