The focal length of each lens can be calculated using a simplified thick lens equation:f = R/(n-1),where n is the index of refraction and R is the radius of curvature of the lens surface. N-BK7 has an Abbe Number of 64.17, which is an indicator of the dispersion....
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Dispersion EquationIn this work we propose a method for the characterization of the dispersion equation for uniaxial crystals for both ordinary and extraordinary refractive indices respectively. This method is based on measurements of the focal length of a plano-convex uniaxial lens, when the crystal ...
Also, it is possible to make biconvex lenses with different curvature radii on both sides. Similarly, defocusing lenses can be biconcave or plano-concave. Figure 4: Different types of optical lenses. According to lensmaker's equation (see above), a certain dioptric power can be achieved with...
The focal length of each lens can be calculated using a simplified thick lens equation:f = R/(n-1),where n is the index of refraction and R is the radius of curvature of the lens surface. These lenses are fabricated from N-BK7, which has an Abbe Number of 64.17; this value is an...
An optical module (10) comprises a positive meniscus lens (16) having a focal length F1 and comprising a first convex optical surface (12) and a second concave optical surface (20), and a plano-convex lens (22) having a focal length F1 and comprising a third flat optical surface (24)...
The curvatures of the four optical surfaces () are defined by the equation: Zi=CURViYi2/(1+(1+Ki)CURVi2Yi2))+(Ai)Yi2+(Bi)Yi4+(Ci)Yi6+(Di)Yi8, and the two lenses are defined by 0.35 Qiu, XiaoxiongLusinchi, Jean-pierre
and Q. A. Naqvi, "Focusing of electromagnetic plane wave into uniaxial crystal by a three dimensional plano convex lens," Progress In Electromagnetics Research, Vol. 83, 25-42, 2008.A. Ghaffar and Q. A. Naqvi, "Focusing of electromagnetic plane wave into uniaxial crystal by a three ...
plano-convexWe provide analytic formulas for fews aspheric terms either plano-convex or convex-plano aspheric lenses. These formulas are obtained considering an expansion in Taylor's series from exact caustic equation produced by aspheric lenses. A comparison between our method and numerical methods of...
The simulated and measured focal lengths of the PSCSIL exhibited a great discrepancy with their respective values predicted using the conventional focal length equation. This discrepancy was further studied using the ray-tracing method and is described in the discussion section. In conclusion, the ...