Abstract
The conical diffraction Offner hyperspectral imaging spectrometer (CDO-HIS) is a hyperspectral calibrator for monitoring the radiation stability of an ocean color sensor. The spectrometer adopts the structure of the conical diffraction Offner configuration (CDO-CF), containing a convex blazed grating to produce a nearly nondistortion and high spectral fidelity image. The theory analysis of the conical diffraction Offner is discussed and introduced to the instrument design. The optimization procedure and design results of CDO-HIS and the conical diffraction grating are provided based on the design ideas, which show benefits of the employment of CDO-CF. The results of laboratory characterization are presented, including the grating diffraction efficiency and the instrument performance.
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