相关实验视频
Updated: Apr 30, 2026
10:35
Bringing the Visible Universe into Focus with Robo-AO
Published on: February 12, 2013
20.0K
概括
一个新的视觉成像系统准确地测量了大孔天线子反射器. 这种非热,耐辐射的设计在极端条件下提供稳定的性能,满足射电望远镜测量需求.
科学领域:
- 光学工程是指光学工程.
- 无线电天文学仪器仪表仪器仪表
- 计量学 计量学是一门学科.
背景情况:
- 精确的次反射器测量对于大光圈射电望远镜的性能至关重要.
- 现有的测量方法可能无法满足基于太空或极端环境应用的严格要求.
研究的目的:
- 开发和验证用于大孔天线子反射器的视觉成像测量系统.
- 设计一个长焦距系统,以优化的光学性能进行精确的测量.
主要方法:
- 使用视觉成像测量方法与优化的长焦距镜头系统.
- 设计了一个使用化的非热系统,能够在真空和极端温度 (-20至+40°C) 中工作.
- 分析了不同聚焦技术对系统性能的影响.
主要成果:
- 通过75毫米的焦距镜头在1.5-10米的范围内实现了清晰的成像.
- 该系统在广泛的温度范围内表现出稳定的成像,并且对太空辐射具有抗性.
- 证明了高稳定性,小尺寸,轻量化和最小的扭曲 (≤0.5%).
结论:
- 设计的视觉成像测量系统符合大型光圈射电望远镜中次反射仪表学的严格要求.
- 它的坚固设计,包括热稳定性和耐辐射性,使其适合于充满挑战的环境.
- 该系统的紧和稳定特性提高了其在天线对齐和校准中的适用性.
相关概念视频
01:25IR Spectrometers
3.1K
There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
3.1K
01:22Atomic Absorption Spectroscopy: Instrumentation
2.1K
An atomic absorption spectrophotometer (AAS) comprises several components: a radiation source, an atomizer, a monochromator, and a detector. The radiation source can be a hollow-cathode lamp (HCL) or an electrodeless-discharge lamp (EDL), both of which provide a narrow emission line of the required wavelength. However, some instruments use continuum sources and high-resolution monochromators to achieve a narrow range of radiation.
The atomizer used in AAS can be either a flame atomizer or an...
The atomizer used in AAS can be either a flame atomizer or an...
2.1K