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| 高轨道准直式红外地球模拟器光学系统设计 |
| Design of the optical system for high orbit collimating infrared earth simulator |
| 投稿时间：2013-09-15 |
| DOI：10.3969/j.issn.1005-5630.2014.01.006 |
| 中文关键词: 地球模拟器 锗透镜 红外光学系统 可变光阑 |
| 英文关键词:earth simulator germanium lens infrared optical system variable aperture |
| 基金项目: |
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| 摘要点击次数: 3424 |
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| 中文摘要: |
| 为了提高红外地球敏感器的地面测试与标定精度，以地球模拟器能够精确达到技术指标为目的，对地球模拟器光学系统进行研究。在光学系统中将地球光阑放于锗准直透镜的焦平面附近，使得通过地球光阑的光入射到锗准直透镜后，以平行光出射到红外地球敏感器上。同时根据卫星在同步轨道、更高轨道和较低轨道所使用的红外地球敏感器地面标定试验的需求，采用更换地球光阑的方案，提供了三种不同的地球张角。计算结果表明，地球模拟器边缘处成像清晰，且三种不同轨道的地球张角误差均小于±0.05°。该方案设计的地球模拟器可准确在地面上模拟卫星在太空中所看到的地球，满足了地球模拟器的整体性能要求。 |
| 英文摘要: |
| In order to improve the testing and precision calibration of the infrared earth sensor on the ground and raise its precision, the optical system of earth simulator was discussed. The scheme was to put earth aperture on the focal plane of the germanium lens and get the parallel light to arrived to the earth sensor. In addition, based on the requirements of ground earth sensor, a scheme of changing the earth diaphragm was designed, aiming at the satellite synchronous orbit height, higher orbit and lower orbit. Results of the experiments showed that we could get clear image of the margin of the earth simulator. Meanwhile, the errors of the three types of the earth angles were all under ±0.05°. Therefore, the earth simulator, which meets overall performance requirements, can precisely simulate what the earth on the ground looks like from the satellite in the space. |
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