以圓錐曲面設計之太陽能集光器

The Solar Concentrator Using Conic Planes

呂問星(Wun-Sing Lyu)

指導教授 ： 楊朝欽

崑山科技大學/工程學院/光電工程研究所/碩士(2011年)

摘要

本文提出一個以圓錐曲面設計，具太陽能集光器功能的改良內全反射透鏡(TIR透鏡)架構，此架構的主要功能是將太陽所發射之垂直平行光收集匯聚於集光點，並改良減低傳統TIR透鏡架構的高度。本文架構由外而內共有四層全反射面，第一、二、三層為拋物面，第四層為橢圓全反射面，第一、二、三層的拋物全反射面，可使離光軸較遠的平行光，經由此三層面產生全反射並匯聚於焦點，第一、二層的焦點為集光點，第三層的焦點為第四層橢圓全反射面的第二焦點，第四層的橢圓全反射面，可使來自第二焦點的光經由此面產生反射並匯聚於第一焦點(集光點)，架構前端為一平面穿透面，與穿透面垂直的光線，經由此穿透面不會產生偏折，架構中心前端為凸透鏡，凸透鏡分為球面折射面與平面折射面，可使平行光先經由球面，再經由平面的進行二次折射，進而匯聚於集光點，架構中心後端為一球型穿透面，穿透面球心位於集光點，使光源經過穿透面時不會產生其他偏折，並準直匯聚於球心(集光點)。

關鍵字

圓錐曲面 ； 內全反射透鏡 ； 太陽能集光器

並列摘要

This paper presents an improved version of internal reflection lens (TIR lens) by using conical surface design that can be used as a solar light concentrator. Its main feature is to concentrating the parallel light from the sun on one light-gathering point with shorter height as compared to the traditional TIR lens. There are four reflection planes totally: The first, second and third reflection planes are parabolic planes and the fourth plane is an elliptic plane. The parallel light away from the optical axis can be concentrated on the light-gathering point by the first, second and third reflection planes. The focal points of the first and second reflection planes have the same location as the light-gathering point, and the focal point of the third reflection plane is the second focal point of the fourth reflection plane(ellipse plane). The light from the second reflection plane is concentrated on the light-gathering point (which has the same location as the first focal point of the fourth reflection plane ) by the reflection from the fourth reflection plane. Around the front end, the proposed architecture has a transparent plane and the incident light with directions perpendicular to the plane can’t be penetrated. There is one convex len in the middle of the frond end. The convex len has two planes: one is the spherical refraction surface and the other is the plane refraction surface. The parallel light can be concentrated on the light-gathering point by the refractions at these two planes. There is one transparent plane with spherical shape in the back end of the proposed architecture and the central point of this spherical plane has the same location as the light-gathering point. This is because the light toward the central point of the sphere can’t be penetrated and is converged at the central point of the sphere.

並列關鍵字

conic surface ； internal reflection lens ； solar concentrator

參考文獻

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