颜色传感器在光谱校准中的应用
The Use of Color Sensors for Spectrographic Calibration
摘要：
光谱仪的波长校准是许多学科中必不可少的但具有挑战性的任务。校准传统上是通过对包含已知出现在某些波长的特征的光源的光谱进行成像并将其映射到传感器上的位置来完成的。这通常需要与每次科学观测结合起来，以说明仪器随时间的机械和光学变化，对于某些项目来说，这可能需要数年。这里提出的方法研究使用颜色本身而不是光谱特征来校准光谱仪。这种校准的主要优点是任何宽光谱光源（例如天空或白炽灯泡）都是合适的。该方法允许使用仪器的完整光学路径进行校准，而不是结合可能引入误差的单独校准设备。本文重点介绍了径向速度天文学领域的颜色校准潜力，其中仪器必须长时间精细校准以检测微小的多普勒波长偏移。这种方法并不局限于径向速度，但是，并可能会发现应用在任何领域需要校准光谱仪，如海水分析，细胞生物学，化学，大气研究，等。本文证明，颜色传感器有潜力提供校准大大降低复杂性。
英文摘要：
The wavelength calibration of spectrographs is an essential but challenging task in many disciplines. Calibration is traditionally accomplished by imaging the spectrum of a light source containing features that are known to appear at certain wavelengths and mapping them to their location on the sensor. This is typically required in conjunction with each scientific observation to account for mechanical and optical variations of the instrument over time, which may span years for certain projects. The method presented here investigates the usage of color itself instead of spectral features to calibrate a spectrograph. The primary advantage of such a calibration is that any broad-spectrum light source such as the sky or an incandescent bulb is suitable. This method allows for calibration using the full optical pathway of the instrument instead of incorporating separate calibration equipment that may introduce errors. This paper focuses on the potential for color calibration in the field of radial velocity astronomy, in which instruments must be finely calibrated for long periods of time to detect tiny Doppler wavelength shifts. This method is not restricted to radial velocity, however, and may find application in any field requiring calibrated spectrometers such as sea water analysis, cellular biology, chemistry, atmospheric studies, and so on. This paper demonstrates that color sensors have the potential to provide calibration with greatly reduced complexity.
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