We propose using telescopes with an elongated-pupil to improve resolution as compared to circular-pupil tele- scopes. For the same aperture area and exposure time, an elongated-pupil telescope will have higher resolution on one axis than the maximum resolution of the circular-pupil on any axis. If the elongated-pupil is rotated around the optical axis and the same field is measured at different angles, a final image with a circular-symmetric point spread function can be reconstructed using proper image coaddition algorithms. We present simulations comparing a circular- and an elongated-pupil telescope and show the elongated-pupil telescope attains higher contrast at lower separation between a bright star and a faint companion. Further work, probing the advantages of elongated-pupil telescopes using simulations of imperfect optics, point spread function measurement errors, and atmospheric turbulence is currently underway.
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