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from article Lens (optics)
Typical magnifiers. (a) Sphere with equatorial diaphragm. (b, c) Planoconvex lens combinations. (d) Steinheil triple aplanat. (e) Chevalier type.
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from article Lens (optics)
Detail of Fresnel lens designed for concentrating sunlight onto photovoltaic cells. The rings are prisms as seen in a cross section in Fig. 7. (Picture by Hans Philipp Annen, Concentrator Optics GmbH)
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from article Lens (optics)
Fresnel lens (material is dark), as opposed to plano-convex lens. f is the focal length, r is the radius of the lens.
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from article Lens (optics)
Prisms forming two flat Fresnel lenses, shown for the right-hand side of each lens. For each diagram, the optical axis of the lens is to the left of the diagram, and the focus is further down on the page. (a) Prism oriented toward the focus of the…
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from article Lens (optics)
Example of a lithographic projection lens with 31 refractive elements. (U.S. Patent 7301707)
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from article Lens (optics)
Three-element cell phone camera lens. (U.S. Patent 7477461)
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from article Lens (optics)
Free-form optics. (a) Free-form lens for laser beam shaping (Anteryon). (b) Free-form prism for projection heads-up display (D. Cheng et al., Design of an optical see-through head-mounted display with a low f-number and large field of view using a…
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from article Lens (optics)
Four-reflection lens. (E. J. Tremblay et al., Ultrathin four-reflection imager, Appl. Opt., 48:343–354, 2009)
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from article Mixing
Typical impeller-type liquid mixer. (After V. W. Uhl and J. B. Gray, Mixing: Theory and Practice, vol. 2, Academic Press, 1967)
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from article Mixing
Effect of impeller size and speed on flow and turbulence (shear) at constant power.
