POLYMER MOULDED TRANSLUCENT ARTICLE Russian patent published in 2011 - IPC B29C71/00 F21V3/02 F21S8/00 

FIELD: physics.

SUBSTANCE: article is made from sheet plastic in form of protective glass for a light source composed of multiple concentric or plane-parallel sectors relative an optical axis. Each sector in the cross-section has an aspect angle of 90 degrees and one of the sides is parallel to the light flux, while the second is perpendicular. The angle at the upper side is a projection of the angle from the lower side relative the light source such that light passes through the lower and upper edges of the glass at all points perpendicular to the surface in order to reduce reflection loss.

EFFECT: high light transmission of the article.

5 cl, 9 dwg