| 摘要 |
FIELD: physics. ^ SUBSTANCE: article is made in form of glass composed of concentric or plane-parallel sectors relative an optical axis. Each sector in the cross section has aspect angle of 90 degrees. On the side of the glass closer to the light source, each near side of the angle to the optical axis lies parallel the direction of light flux from the light source, and each far side of the angle from the optical axis lies perpendicular to the direction of the light flux from the light source. On the side of the glass far from the light source, each near side of the angle to the optical axis lies perpendicular to the direction of light flux from the light source, and each far side of the angle from the optical axis lies parallel to the direction of the light flux from the light source. ^ EFFECT: high light transmission of the article. ^ 5 cl, 9 dwg |
