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Published online by Cambridge University Press: 23 September 2019
The quality of a lens system for a given application depends on several factors. Among them are the choice of lens form that best suits the application, the image quality provided by the lens, and how well the image quality can be maintained under actual lens fabrication and assembly errors, environmental conditions, and actual lens use. A starting point for a lens design is the lens specifications, which includes first-order requirements, packaging constraints, optical power-efficiency, and image quality requirements. Ultimately, lens cost is often a major design driver.
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