Imaging properties of a photoheliograph with a Lyot plane shutter

Physics

Scientific paper

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Astronomical Photography, Camera Shutters, Imaging Techniques, Solar Instruments, Spectroheliographs, Frequency Response, Slits

Scientific paper

In a photoheliograph the shutter (a slit moving with constant velocity) may be placed in the Lyot plane, where the image of the objective is formed by the enlarging lens. This degrades the frequency response function of the objective, depending on the width of the slit. Calculated frequency response functions for an ideal objective and various slit widths are presented.

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