| 题名: | Liquid crystal adaptive optics system for un-polarized light |
| 作者: | DongmEi Cai; Jun Yao; Wenhan Jiang
|
| 出版日期: | 2009
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| 会议名称: | Proceedings of SPIE
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| 会议日期: | 2009
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| 通讯作者: | DongmEi Cai
|
| 中文摘要: | A homogeneous aligned nematic liquid crystal (LC) cell can be used to phase modulate light. It has a series of
attractive characteristics of compactness, high density integration, low cost and possibility of batch production
in adaptive optics. However a problem has long existed for such devices is that they may be used only to control
the phase of light polarized along the LC extraordinary axis since only the extraordinary light index can be
varied by the application of the electric field. For a liquid crystal adaptive optics system using for astronomical
imaging, low level un-polarized light is collected by the telescope. So the high optical efficiency is important
and key factor for an adaptive optics system using for compensate atmosphere turbulence. If a polarizer placed
before LC, 50% of incident un-polarized light is wasted. In this paper, a simple method is detailed described
for phase modulating un-polarized light. Un-polarized light can be thought of as the superposition of any two
orthogonal polarization states that are mutually incoherent. Iceland-spar OE crystal split incident un-polarized
light into two polarized light, two same LCs modulated these two polarized light separately. After that, both
these two polarized light beam are combined using another Iceland-spar OE crystal. These double LC adaptive
optics system can phase modulate all incident un-polarized light, no light intensity is wasted. |
| 英文摘要: | A homogeneous aligned nematic liquid crystal (LC) cell can be used to phase modulate light. It has a series of
attractive characteristics of compactness, high density integration, low cost and possibility of batch production
in adaptive optics. However a problem has long existed for such devices is that they may be used only to control
the phase of light polarized along the LC extraordinary axis since only the extraordinary light index can be
varied by the application of the electric field. For a liquid crystal adaptive optics system using for astronomical
imaging, low level un-polarized light is collected by the telescope. So the high optical efficiency is important
and key factor for an adaptive optics system using for compensate atmosphere turbulence. If a polarizer placed
before LC, 50% of incident un-polarized light is wasted. In this paper, a simple method is detailed described
for phase modulating un-polarized light. Un-polarized light can be thought of as the superposition of any two
orthogonal polarization states that are mutually incoherent. Iceland-spar OE crystal split incident un-polarized
light into two polarized light, two same LCs modulated these two polarized light separately. After that, both
these two polarized light beam are combined using another Iceland-spar OE crystal. These double LC adaptive
optics system can phase modulate all incident un-polarized light, no light intensity is wasted. |
| 收录类别: | Ei
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| 语种: | 英语
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| 卷号: | 7209
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| 文章类型: | 会议论文
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| 内容类型: | 会议论文
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| URI标识: | http://ir.ioe.ac.cn/handle/181551/7866
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| Appears in Collections: | 微细加工光学技术国家重点实验室（开放室）_会议论文
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| 2009-114.pdf（132KB） | 会议论文 | -- | 限制开放 | | View
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| Recommended Citation: | |
DongmEi Cai,Jun Yao,Wenhan Jiang. Liquid crystal adaptive optics system for un-polarized light[C]. 见:Proceedings of SPIE. 2009.
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