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Convex lens is converging thick in middle has positive focal length forms real image while concave lens is diverging and forms virtual image. ... close they will appear as one because the optical instrument makes a point source look like a small disc or spot of light with circular diffraction fringes. ... may be corrected by using different ...
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Selecting the Proper Lens. Lenses are subject to numerous types of aberrations; chromatic aberration and spherical aberration are two common examples. By properly choosing the lens design or using multi-element systems the effects of aberrations can be decreased and the performance of …
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White glass spherical double convex having two out side curved parallel surfaces to each other and used for magnification and converging the light and having a positive focal length and two inwards parallel surfaces and diverging the light. Manufactured the lenses from extra white glass…
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Ray Optics and Optical Instruments Refraction at Spherical Surface and By Lenses. Every one of us has used the spherical lenses in some way or the other. The lens we use in spectacles the mirror of our vehicle is nothing but the spherical surface. But do you know what causes refraction in the spherical surface? ... Refraction at Spherical ...
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Lenses are classified by the curvature of the two optical surfaces. A lens is biconvex (or double convex or just convex) if both surfaces are convex.If both surfaces have the same radius of curvature the lens is equiconvex.A lens with two concave surfaces is biconcave (or just concave).If one of the surfaces is flat the lens is plano-convex or plano-concave depending on the curvature of the ...
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Plano-Convex Lenses are the best choice for focusing parallel rays of light to a single point or a single line in the case of cylindrical lenses. This lens can be used to focus collect and collimate light. It is the most economical choice for demanding applications. The asymmetry of these lenses minimizes spherical aberration in situations where the object and image are located at unequal ...
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