Abstract
Recently, computer simulations of photometric performance of luminaires have improved, resulting in more suitable lighting. However, due to some approximations in the modeling of optical systems, the simulations have a restricted application, their applications are limited to quadric or rational surfaces.We have solved these problems by developing a new computer simulation system for three dimensional optical systems. This paper presents the method of simulation and validates it.To simulate an optical system which has an asymmetric shape, we have developed a ray-tracing method for parametric surfaces. Every geometric shape of an optical system can be transformed into parametric surfaces and can be analyzed by this system. It is efficient to express an optical system as parametric surfaces, in the aspect of computation time and accuracy and data imput time for simulation. This method can analyze optical systems which are intended to be nonquadric or which must be non-quadric for manufacturing reasons. To verify the validity of this method, we made some experiments. Luminous distribution by simulation agrees with the result of measurement.
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More From: Journal of the Illuminating Engineering Institute of Japan
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