HIGH RESOLUTION AND SENSITIVITY IMAGING SPECTROGRAPH

摘要

A high-resolution, high-throughput imaging echelle spectrograph having a long slit yields high spectral resolution and large spectral coverage simultaneously. The user is able to make quick adjustments of the desired field of view. The overlapping of different spectral orders are separated using a mosaic of interference filters which transmit approximately 50 .ANG. around the selected spectral lines. The spectra recorded by the invention, therefore, are not like any other, where wavelength increases or decreases monotonically along a given direction on an imaging detector. Instead, only selected windows about user selectable spectral regions are recorded simultaneously on the detector.