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The Trijicon biblical verses controversy refers to the stamping of Bible verse references (e.g. "Rev 21:23") onto optical sights for rifles manufactured by Trijicon. Users and purchasers of the equipment—which included the United States Army , United States Marine Corps , and other military units around the world—were unaware of the ...
A Laguerre-Gaussian beam is an optical vortex with a line singularity along the beam axis. An optical singularity is a zero of an optical field. The phase in the field circulates around these points of zero intensity (giving rise to the name vortex). Vortices are points in 2D fields and lines in 3D fields (as they have codimension two).
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Back vertex distance BVP: Back vertex power CD: Centration distance C/D: Cup–disc ratio CF: Count fingers vision – state distance c/o or c.o. Complains of CT: Cover test c/u: Check up CW: Close work Δ: Prism dioptre D: Dioptres DC: Dioptres cylinder DNA: Did not attend DOB: Date of birth DS: Dioptres sphere DV: Distance vision DVD ...
The sign convention for the optical radius of curvature is as follows: If the vertex lies to the left of the center of curvature, the radius of curvature is positive. If the vertex lies to the right of the center of curvature, the radius of curvature is negative. Thus when viewing a biconvex lens from the side, the left surface radius of ...
Intel said on Wednesday its deal for $7.86 billion in U.S. government subsidies restricts the company's ability to sell stakes in its chipmaking unit if it becomes an independent entity. The U.S ...
Vertex distance is the distance between the back surface of a corrective lens, i.e. glasses (spectacles) or contact lenses, and the front of the cornea. Increasing or decreasing the vertex distance changes the optical properties of the system, by moving the focal point forward or backward, effectively changing the power of the lens relative to ...
Jo Denman and Tessa Parry-Wingfield formed a close friendship after they were both diagnosed with a rare form of cancer which resulted in them each having an eye removed