Borescope

According to Wikipedia.org, optical lens design is the science of calculating of the different lens construction parameters that must meet or at least get as close as possible to the required values.

The construction parameters of optical lens include surface types (spherical, aspheric, holographic, diffractive, etc.), and different parameters for each surface type like radius of curvature, thickness to the next surface, glass type, and tilt and/or decenter.

An important factor in the optical design are the costs associated with the manufacturing and the delivery schedules that must be met. The price of optical lens depends on the size, glass type, index homogeneity quality. The initial design is done using the data from the various glass manufacturer catalogs, more specifically, the average glass index of refraction and dispersion properties are taken. At the end, the index of refraction values can vary by as much as 0.0003 or more from catalog values, and dispersion can either remain about the same or vary slightly.

With the advance of digital technology, computer programs are applied for the design of optical lens. The algorithms of these programs have curve fitting procedures that can fit the melt data to a selected dispersion curve, from which the index of refraction at any wavelength within the fitted wavelength range can be calculated. The thing to remember here is that the precision is increased and the performance of the produced lens will be more close to the requirements if average glass catalog values for index of refraction are assumed.

Optical lens design is a combination of science and art. The scientific part is in the calculation of ray paths and wavefront structure, while the art is in the design requires skills and intuition, which is acquired over the years of experience spanning hundreds to thousands of different lens design projects.

The zoom provided by optical lens is of much better quality compared to the one achieved from electronically magnifying the image. But downside is that as always, quality comes at a certain price - the higher the quality, the higher the price. Because of their precise nature the lens elements can get expensive.

If you are interested in buying optical lenses then visit http://www.baikang.cn. This is the official website of Shenzhen Baikang Optical Co., LTD - a company that specializes in the production of optical lens. Their main products are glass lenses and various plastic lenses with spherical or aspherical designs.

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