Why convex lens is not used for concentrating sunlight on receiver instead of mirrors ?

15 July 2023 1 2K Report

At present a large number of mirrors are placed around the receiver and concentrate all of them on the receiver.why can't we use convex lens to concentrate sunlight

Korosh Aghayar Gharehbagh

Dear Shanmuga;

1. From a practical point of view, manufacturing a convex lens with surface smoothness precision about from order of light wavelength, (400-700nm), is more EXPENSIVE and Time-Consuming.

2. Convex lenses compared to mirrors are very heavy and need high-priced and huge stabilization bases.

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