Engineering design of solar concentrator for transporting sunlight through optical fiber

This article presents the development of an optical system for the concentration of natural radiation. The optical system for the developed system of natural illumination based on fiber - Cassegrain system with a two-mirror lens - is considered. A system with a square section of mirrors is justified and calculated. Next, the reflection from the surface of the protective glass made of acrylic is evaluated and the required size of the end face of the polymer fiber used to transmit light to the room is justified. In conclusion, the radiation intensity at the output end of the polymer fiber is calculated. The system parameters were determined: a large mirror diameter of 198 mm, a small mirror diameter of 34.9 mm, a large mirror focal length of 49.5 mm, a small mirror focal length of 7.189 mm, the distance between the surfaces of the mirrors is 40 mm. The evaluation of the reflection from the surface of the protective glass made of acrylic showed that for the protective window of flat geometry the reflection coefficient is 7.74% and the convex geometry is 8.83%. The calculation of the radiation intensity at the output end of the polymer fiber showed that the total output power of the system will be determined by the number of fibers in the system. (paper)