Agile-field telescope system with diffractive wavefront control

Gruneisen, Mark T.; Garvin, Matthew; Dymale, Raymond C.; Rotge, James R.

doi:10.1117/12.621947

Cited by 5 publications

(4 citation statements)

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“…The concept of a scanning telescope with adaptive off-axis aberration correction has been proposed and experimentally demonstrated in Gruneisen et al (2005aGruneisen et al ( , 2005b, which was the motivation for extending our enlarged field of view adaptive optics microscopy work to a telescope design. This uses a liquid crystal spatial light modulator (SLM) to adjust the wavefront.…”

Section: Introductionmentioning

confidence: 97%

Wide Field Scanning Telescope Using MEMS Deformable Mirrors

Scott¹,

Potsaid

Wen

2010

International Journal of Optomechatronics

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Traditional optical telescopes can obtain high resolution images, but only over a narrow field of view. To image over a large field, the typical approach is to move the entire telescope to point to a particular area of interest. In this article, we consider a scanning telescope that only moves one of the optical elements in the telescope. Moving the lower inertia of a single optical element instead of the entire telescope means faster scanning, reduced vibration, and more accurate pointing. Inherent in the design is the introduction of optical aberrations due to off-axis imaging. This article presents simulation and experimental results of using deformable mirrors to correct for the offaxis aberrations. Two different types of deformable mirrors are considered: electrostatic and electromagnetic. The mirror apertures are similar in size, but the electromagnetic mirror has about twice the actuator displacement range than the electrostatic mirror. Through simulation and experiments, we demonstrated that the static field of view may be increased by 40 times with the electrostatic mirror and 80 times with the electromagnetic mirror.

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Section: Introductionmentioning

confidence: 97%

Wide Field Scanning Telescope Using MEMS Deformable Mirrors

Scott¹,

Potsaid

Wen

2010

International Journal of Optomechatronics

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“…For values of l > 1, the limited range of these spatial light modulators (SLMs) requires that the optical phase function be introduced modulo 2π. Assuming monochromatic conditions and adhering to the sign conventions of Goodman [10] wherein a positive optical phase delay introduces a negative phase error, the complex transmittance associated with an optical phase delay function lθ introduced modulo 2π can be shown to be [11]- [13]…”

Section: Introductionmentioning

confidence: 99%

Holographic generation of complex fields with spatial light modulators: application to quantum key distribution

et al. 2007

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There has been considerable interest recently in the generation of azimuthal phase functions associated with photon orbital angular momentum (OAM) for high-dimensional quantum key distribution. The generation of secure quantum keys requires not only this pure phase basis but also additional bases comprised of orthonormal superposition states formed from the pure states. These bases are also known as mutually unbiased bases (MUBs) and include quantum states whose wave functions are modulated in both phase and amplitude. Although modulo 2pi optical path control with high-resolution spatial light modulators (SLMs) is well suited to creating the azimuthal phases associated with the pure states, it does not introduce the amplitude modulation associated with the MUB superposition states. Using computer-generated holography (CGH) with the Leith-Upatnieks approach to hologram recording, however, both phase and amplitude modulation can be achieved. We present a description of the OAM states of a three-dimensional MUB system and analyze the construction of these states via CGH with a phase-modulating SLM. The effects of phase holography artifacts on quantum-state generation are quantified and a prescription for avoiding these artifacts by preconditioning the hologram function is presented. Practical effects associated with spatially isolating the first-order diffracted field are also quantified, and a demonstration utilizing a liquid-crystal SLM is presented.

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“…Examples include wide field scanning (Potsaid et al 2005) and variable view angle microscopes (Tao and Cho 2007), foveated (Martinez et al 2001) and agile field (Gruneisen et al 2005) scanning telescopes, and projection systems aimed at a consumer market (Shevlin et al 2007). In such systems, the interaction between the deformable mirror and the static optical elements must be considered.…”

Section: Integrated Optical Designmentioning

confidence: 99%

Design of Adaptive Optics Based Systems by Using MEMS Deformable Mirror Models

Potsaid

Wen

2008

International Journal of Optomechatronics

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MEMS deformable mirror technology has recently evolved from a specialized wavefront control device to a low cost and high performance product. To facilitate adoption of this emerging technology, this research seeks to investigate: 1) the actual wavefront correcting capabilities of the different MEMS deformable mirror designs, and 2) how to design optical systems to effectively utilize this new technology. A high fidelity finite element model and a fast approximating model of a MEMS deformable mirror are described. Integrated design approaches using both models are compared, which combine the models with commercial optical design software. Defocus case studies are presented and results discussed.

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Agile-field telescope system with diffractive wavefront control

Cited by 5 publications

References 0 publications

Wide Field Scanning Telescope Using MEMS Deformable Mirrors

Wide Field Scanning Telescope Using MEMS Deformable Mirrors

Holographic generation of complex fields with spatial light modulators: application to quantum key distribution

Design of Adaptive Optics Based Systems by Using MEMS Deformable Mirror Models

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