9 IMAGING APPLICATIONS OF NONIMAGING CONCENTRATORS
9.1 INTRODUCTION
The design of imaging optical systems is a classic field of research that has achieved a high level of development. There are on the market optical design programs that permit the numerical optimization of the design parameters, allowing us to obtain results that were unattainable with the analytical tools used before the development of computers.
In many imaging applications it would be interesting to use an optical system with an image-side numerical aperture (NA) as high as possible but satisfying a specified imaging quality. This is the case of most radiation sensors, since their sensitivity is proportional to the luminous power density (irradiance) and thus to NA2. High ...
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