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首页> 外文会议>Conference on Optical Design and Engineering; Sep 30-Oct 3, 2003; St.Etienne, France >Simulation of the ALADIN Transmit-Receive Optics
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Simulation of the ALADIN Transmit-Receive Optics

机译：ALADIN收发光学系统的仿真

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This paper describes the preliminary design of the so-called Transmit/Receive Optics (TRO) for the ADALIN lidar instrument on the future ADM Aeolus weather satellite. The TRO is the central optical unit of the instrument, that feeds the optical signals from the laser source to the emitting/receiving telescope, and vice versa, the received back scattered signals from the telescope to the spectrometers for Doppler shift evaluation. Additionally, the TRO supports a calibration branch, that bypasses the telescope (from the laser to the spectrometers) and aims at levelling out the received signals in terms of wavelength and signal height changes due to wavelength and intensity variations of the laser. Since the spectral range of the ALADIN instrument is narrow (centred at 354.8 nm), the TRO makes use of refractive optics (lenses) to a high extend. A 1 nm narrow band interference filter has been implemented on the reception branch on the TRO to suppress disturbing background signals. Special features of the TRO are two so-called aberration generators on the emitting and calibration branch, with which an artificial astigmatism can be realised for eye safety reasons. An optomechanical concept has been realised with four afocal optical groups, which are connected by parallel beams. Different design options for the aberration generator are being discussed with clear preference of a pure lens solution. The performance of the optical subsystem is monitored by extensive simulations, which are shortly summarised. As a specific simulation example, the analysis and trade-offs of the aberration generator are given.
机译：本文介绍了针对未来ADM Aeolus气象卫星上的ADALIN激光雷达仪器的所谓发射/接收光学（TRO）的初步设计。 TRO是仪器的中央光学单元，它将来自激光源的光信号馈送到发射/接收望远镜，反之亦然，从望远镜接收到的回散射信号到光谱仪以进行多普勒频移评估。此外，TRO还支持一个校准分支，该分支绕过望远镜（从激光器到光谱仪），并旨在根据波长和由于激光器的波长和强度变化而引起的信号高度变化来均衡接收到的信号。由于ALADIN仪器的光谱范围很窄（中心位于354.8 nm），因此TRO在很大程度上利用了折射光学器件（透镜）。在TRO的接收分支上实现了一个1 nm的窄带干扰滤波器，以抑制干扰的背景信号。 TRO的特殊功能是在发射和校准分支上的两个所谓的像差发生器，出于眼睛安全的原因，可以使用它们来实现人工像散。通过四个通过平行光束连接的无焦点光学组实现了光机械概念。讨论了像差产生器的不同设计选项，并且明显偏爱纯镜头解决方案。光学子系统的性能通过广泛的仿真进行监控，这些仿真将在短期内进行总结。作为一个具体的仿真示例，给出了像差发生器的分析和权衡。

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