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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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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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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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Segmented bimorph deformable mirror
Journal of Physics E: Scientific Instruments, 1989The efficient low-voltage bending properties of PZT bimorph wafers have been combined with conventional microelectronics techniques to produce a 37-hex-faceted deformable mirror 23 mm in diameter and 1 mm thick. Despite the high ratio of diameter to thickness, at 633 nm an overall flatness of better than one-half wave peak-to-valley (PV) and one-tenth ...
F Forbes +5 more
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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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Giant segmented mirror telescope
Optical Fabrication and Testing, 2002AURA has answered the call of the astronomy decadal review committee for creation of a 30-meter Giant Segmented Mirror Telescope by forming a New Initiatives Office (NIO). One of the NIO activities in the past year has been to develop a GSMT point design as a tool that serves several purposes, including: exploring the dependence of scientific ...
Larry Stepp +4 more
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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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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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Segmented mirror polishing experiment
Applied Optics, 1982An experiment was conducted to demonstrate the capability of polishing segmented mirrors. A mirror segment was figured with the computer controlled polisher using special software and tooling. This process rapidly reduced surface figure errors and produced a good figure to the segment's edges.
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