Illumination apparatus with polarizing elements for beam shaping
文献类型：专利
| 作者 | AMUNDSEN, THOMAS; GOOD, TIMOTHY, A.; GIORDANO, PATRICK, A. |
| 发表日期 | 2001-07-05 |
| 专利号 | WO2001048520A1 |
| 著作权人 | METROLOGIC INSTRUMENTS, INC. |
| 国家 | 世界知识产权组织 |
| 文献子类 | 发明申请 |
| 其他题名 | Illumination apparatus with polarizing elements for beam shaping |
| 英文摘要 | Illumination apparatus includes a light source (10) which directs a polarized source beam (16) in a downstream direction along an optical axis and desirably focuses the beam. A polarization-altering element (20) downstream from the source alters the polarization in a portion or portions of the source beam, so that the altered beam (24) includes portions (23, 25) having different polarization directions. The altered beam passes downstream through a polarization-selective filter (28). The output beam (30) from the polarization-selective filter can include either portion depending on the orientation of the filter. The arrangement can be used to provide a spot of a given size and shape at the focal location (18) in a scanner such as a bar code scanner. The size and depth of field of the spot can be varied dynamically during operation. |
| 公开日期 | 2001-07-05 |
| 申请日期 | 2000-12-28 |
| 状态 | 未确认 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/52333]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | METROLOGIC INSTRUMENTS, INC. |
| 推荐引用方式 GB/T 7714 | AMUNDSEN, THOMAS,GOOD, TIMOTHY, A.,GIORDANO, PATRICK, A.. Illumination apparatus with polarizing elements for beam shaping. WO2001048520A1. 2001-07-05. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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