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本文给出了一种用于轴对称的两级光学聚光器的非成像二次反射镜(non-imaging secondary, NIS), 的工作原理. 在一般的情况下, NIS是由并不限于常用的二次曲线或复合抛物线的高次曲线围绕一次反射镜的中心轴旋转而形成. 本文讨论了确定这样一种曲线的待定系数的求解方法. 在举例的计算中, 除了运用常用的二次曲线, 还特别运用了光学中至今从未用过的三次方曲线, 用以说明NIS可以由一般的高次曲线给出. 作为一个特例, 我们也讨论了新的光学元件在太阳能聚光方面的应用, 在这些应用中, 本文着重讨论了NIS在太阳光的盘面效应的影响下的聚光效果.Non-imaging reflector may present the advantage to eliminate the dark image in beam down 2-stage optical concentrator. The working principle of the non-imaging secondary (NIS) for an axial symmetric concentrator is revealed. The geometrical shape of NIS can generally be high order surface not restricted to the quadratic one in imaging optics or the CPC in non-imaging optics. The article has described the method to determine the parameters of the curve. To break the tradition in optics, we have demonstrated in the article that beside the quadratic curve, cubic curve can be equally used to form NIS. In the respect of solar energy application, we have made the discussion on the behavior of NIS for solar disc effect and how a new parameter can be used to optimize the design.
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Keywords:
- non-imaging optics /
- secondary reflector /
- concentrated photovoltaic /
- high-order polynomial
[1] Winston R, Minano J C 2004 Non-imaging Optics (Academic Press)
[2] Pinazo J M, Canada J, Arago F 1992 Solar Energy 49 175
[3] Khonkar H E I, Sayigh A A M 1994 Renewable Energy 5 376
[4] Chaves J 2008 Introduction to Non-imaging Optics (CRC Press)
[5] Cooke D, Gleckman P, Krebs H 1990 Nature (London) 346 802
[6] Gleckman P, Gallaguer J O, Winston R 1989 Nature (London) 339 (6221) 198
[7] Chen Y T, Chong K K, Bligh T P 2001 Journal of Solar Energy 71 155
[8] Chen Y T, Lim B H, Lim C S 2006 Journal of Solar Energy Engineering 128 245
[9] Chen Y T, He Z X, 2011 Acta Phys. Sin. 60 078104 (in Chinese) [陈应天, 何祚庥 2011 60 078104]
[10] Chen Y T, Lim B H, Lim C S 2005 Journal of Solar Energy 80 268
[11] Igel E A, Hughes R L 1979 Solar Energy 22 283
[12] Ries H, Schubnell M 1990 Solar Energy Materials 21 213
[13] Chen Y T China Patent 200510200037.X [20060531]
[14] Chen Y T China Patent 201210050545.4 [2012-07-17]
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[1] Winston R, Minano J C 2004 Non-imaging Optics (Academic Press)
[2] Pinazo J M, Canada J, Arago F 1992 Solar Energy 49 175
[3] Khonkar H E I, Sayigh A A M 1994 Renewable Energy 5 376
[4] Chaves J 2008 Introduction to Non-imaging Optics (CRC Press)
[5] Cooke D, Gleckman P, Krebs H 1990 Nature (London) 346 802
[6] Gleckman P, Gallaguer J O, Winston R 1989 Nature (London) 339 (6221) 198
[7] Chen Y T, Chong K K, Bligh T P 2001 Journal of Solar Energy 71 155
[8] Chen Y T, Lim B H, Lim C S 2006 Journal of Solar Energy Engineering 128 245
[9] Chen Y T, He Z X, 2011 Acta Phys. Sin. 60 078104 (in Chinese) [陈应天, 何祚庥 2011 60 078104]
[10] Chen Y T, Lim B H, Lim C S 2005 Journal of Solar Energy 80 268
[11] Igel E A, Hughes R L 1979 Solar Energy 22 283
[12] Ries H, Schubnell M 1990 Solar Energy Materials 21 213
[13] Chen Y T China Patent 200510200037.X [20060531]
[14] Chen Y T China Patent 201210050545.4 [2012-07-17]
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