METHOD OF MAKING FRESNEL LENSES FOR CONCENTRATOR PHOTOVOLTAIC MODULE Russian patent published in 2012 - IPC G02B3/08 B29D11/00 

FIELD: physics.

SUBSTANCE: method involves making a negative matrix 1 and removing positive copies of a linear Fresnel lens 12 therefrom. The negative matrix 1 with a negative profile 4 is made by diamond turning of a belt fastened around the side surface of a drum. The negative matrix 1 is then separated from the drum and attached to a flat substrate by the surface which is opposite the surface with the turned negative profile, in front of which a flat glass plate is then placed, having on the surface facing the negative matrix a transparent adhesive coating and on the opposite surface - an antireflection coating. Positive copies of the linear Fresnel lens 12 are made by filling the gap between the negative matrix 1 and the flat glass plate 5 with a liquid silicone elastomer (7) and then squeezing out excess amount of the liquid silicone elastomer. After curing the silicone elastomer, the linear Fresnel lens 12 is separated from the flat glass plate 5 by bending the matrix 1 and simultaneously directing a jet of compressed air on the joint between the bent negative matrix 1 and the glass plate 5 with the ready linear Fresnel lens 12.

EFFECT: improved optical quality of Fresnel lenses and reduced weight thereof.

8 cl, 4 dwg