Adaptive Optics Correction of the Wavefront Distortions Induced by Segments Misalignment in Extremely Large Telescope
نویسندگان
چکیده
The capability of the adaptive optics to correct for the segmentation error is analyzed in terms of the residual wavefront RMS and the power spectral density of the phase. The analytical model and the end-to-end simulation give qualitatively equal results justifying the significance of the geometrical matching between segmentation geometry and the actuators/subaperture distribution of the adaptive optics. We also show that the design of the wavefront sensor is rather critical.
منابع مشابه
Design of the Adaptive Optics Systems for GMT
The Giant Magellan Telescope (GMT) includes adaptive optics (AO) as an integral component of its design. Planned scientific applications of AO span an enormous parameter space: wavelengths from 1 to 25 μm, fields of view from 1 arcsec to 8 arcmin, and contrast ratio as high as 10. The integrated systems are designed about common core elements. The telescope’s Gregorian adaptive secondary mirror...
متن کاملCorrection of wavefront distortions by means of thermally adaptive optics
A new method for the correction of wavefront distortions in laser interferometers is proposed. In contrast to the usual adaptive correction, by means of piezoelectric actuators, a high power laser beam is used to control the thermal expansion of the optical elements. Since the correction is performed without mechanically contacting the element, no additional mechanical noise is introduced. Init...
متن کاملDirect 75 Milliarcsecond Images from the Multiple Mirror Telescope with Adaptive Optics
We report results from an adaptive optics system designed to provide imaging at the diffraction limit of resolution in the near infrared at the Multiple Mirror Telescope (MMT). For the present experiment, the aperture consisted of five of the six primary mirrors of the MMT, operating as a coherently phased array. The largest components of the atmospherically-induced wavefront aberration are the...
متن کاملNon-contact Adaptive Optic Actuator System for Wavefront Distortion Correction
INTRODUCTION Adaptive optic systems are used in ground-based telescope systems for correcting atmospheric wavefront distortions. Current adaptive optic systems are also used in microscopes, high power lasers and tomography to correct for tissue density and heat effects. Requirements for optical systems are more demanding in terms of resolution and manufacturing. While conventional adaptive opti...
متن کاملAn Efficient Correction Algorithm for Eliminating Image Misalignment Effects on Co-Phasing Measurement Accuracy for Segmented Active Optics Systems
The misalignment between recorded in-focus and out-of-focus images using the Phase Diversity (PD) algorithm leads to a dramatic decline in wavefront detection accuracy and image recovery quality for segmented active optics systems. This paper demonstrates the theoretical relationship between the image misalignment and tip-tilt terms in Zernike polynomials of the wavefront phase for the first ti...
متن کامل