"Fundamental optical formulae". Choose all parameters unit. thick lens. Your email address will not be published. Leave a Reply Cancel reply. The lens maker’s equation is another formula used for lenses that give us a relationship between the focal length, refractive index, and radii of curvature of the two spheres used in lenses. Even when Gullstrand's equation is used to find the equivalent power of the thick lens, that power is with respect to a principal plane.The thickness of the lens alters the image position and the center of the thick lens cannot in general be used as the lens position. Raddii and x are algebric or infinite. The thin lens equation cannot be used directly to find images formed by thick lenses. Lens design is quite complex, involving compromises on many parameters and design for manufacturing considerations. Power P. The power P of a lens is defined to be the inverse of its focal length. I recommend … I'd be glad to provide some links. In our last lecture ( lecture V ) we introduced the matrix methods for optical systems. Thick Lens Imaging. Caution Fill in all input cells. A thick lens cannot be characterized by a single focal length measured from a single plane. n can be either a value or the reference of a glass from the catalog. In equation form, this is $P=\frac{1}{f}\\$, where f is the focal length of the lens, which must be given in meters (and not cm or mm). Apparently there are videos too. B. Could someone link a derivation of the thick lens equation so I could figure it out myself? The two back focal lengths, BFL 1 and BFL 2, are measured from the vertices. Apparently there are videos too. The lens equation tells us everything we need to know about the image of an object that is a known distance from the plane of a thin lens of known focal length. Background. then, equivalency between the thick lens and thin lens pair can be shown by substituting the above thin lens expressions into the thick lens equation. The path length increase Δ discussed above is illustrated in the lens diagrams below, also. Enter "infinite" for a plane surface or an object at infinity. HyperPhysics's "Thick Lens Imaging", and a dozen subpages. I am not sure if you needed to ask the question in SE. This is done to make ray optics calculations simpler, but the first step would be to identify what constitutes thin and thick lenses. $\begingroup$ You can google for "thick lens equation derivation" and it is the first hit. If a value is directly entered, the wavelength will not be considered. $\endgroup$ – Alonso Perez Lona Jun 4 '19 at 20:14 The power of a lens P has the unit diopters (D), provided that the focal length is given in meters. A single focal length F may be retained if it is measured from two planes, H 1, H 2, at distances P 1, P 2 from the vertices of the lens, V 1, V 2. Thick lens equation and matrix for thick lens C. System matrix for thin lens D. Unit and Nodal planes E. Matrix for a system of 2 thin lenses. e is positive.