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Segmented bimorph mirrors for adaptive optics: segment design and experiment [PDF]
Applied Optics, 2014 We discuss the concept of lightweight segmented bimorph mirrors for adaptive optics. The segment consists of a monocrystal silicon substrate actuated by an array of in-plane piezoceramic (PZT) actuators with honeycomb electrodes. We focus on technological aspects of the segment design that are critical for space applications and describe a single ...
Ioan Burda, André Preumont
exaly +5 more sources
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Fast tip-tilt segment alignment for segmented mirrors
Proceedings of SPIE, 2016A method for fast identification of segments and alignment of the segmented mirrors has been developed and applied for the deformable mirror of the WHT AO system (NAOMI) and for the GTC 36-segment primary mirror. By moving each segment by a known but different amount and in a different direction it is possible to identify many segments simultaneously ...
exaly +2 more sources
Depth-Aware Mirror Segmentation
2021 IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR), 2021We present a novel mirror segmentation method that leverages depth estimates from ToF-based cameras as an additional cue to disambiguate challenging cases where the contrast or relation in RGB colors between the mirror reflection and the surrounding scene is subtle.
Haiyang Mei +6 more
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Design and analysis of segmented-mirror primary mirror system
Optik, 2021Abstract with the development of space exploration, the resolution of optical system is required to be higher and higher. According to the Rayleigh criterion, the resolution of the optical system is directly proportional to the aperture. However, due to the influence of processing capacity and size of the rocket fairing, it is difficult to achieve ...
Chen-chen Wang +4 more
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Simulation of segmented mirror telescope and calculating asphericity of segmented mirror
SPIE Proceedings, 2014To determine parameters of the Segmented Mirror Telescope is quite essential for the design, manufacture, testing and construct of the telescope system, especially the F-number parameters and curvature radius of the primary mirror, as well as the asphericity.
Zhou Liao, Qi Qiu, Yudong Zhang
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Adaptive tertiary mirror for segmented mirror control
SPIE Proceedings, 2004Advances in the fabrication of adaptive ceramic modules result in compact components that can be adapted to a variety of applications. The adaptive tertiary is a unique component that can provide a variety of functions. Individual modules integrated with a tip/tilt stage can provide auxiliary phasing control of future large segmented telescopes.
Thomas R. Price, Mark A. Ealey
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Fresnel phasing of segmented mirror telescopes
Applied Optics, 2011Shack-Hartmann (S-H) phasing of segmented telescopes is based upon a physical optics generalization of the geometrical optics Shack-Hartmann test, in which each S-H lenslet straddles an intersegment edge. For the extremely large segmented telescopes currently in the design stages, one is led naturally to very large pupil demagnifications for the S-H ...
Gary, Chanan +4 more
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New phasing algorithm for large segmented telescope mirrors [PDF]
Optical Engineering, 2002 We propose a new phase calibration method, called the sensor-by-sensor phase calibration method (SSPC), which is applied for the phasing of a large segmented telescope mirror.
Weiyao Zou
exaly +3 more sources
Pyramid sensor for segmented mirror alignment
Optics Letters, 2005We report what is to our knowledge the first laboratory experiment that shows the use of a pyramid wavefront sensor to cophase and align segmented mirrors having three degrees of freedom per segment, i.e., piston, tip, and tilt. In the laboratory the iterative alignment procedure reached a wavefront residual error of about 10 nm. The residual error was
S, Esposito +4 more
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