Results 201 to 210 of about 3,906 (246)
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A reference wavefront for wavefront sensing instruments
Workshop on Optical Fabrication and Testing, 1986A reference light source (RLS) was designed to allow the measurement and removal of system wavefront errors in wavefront sensing instruments. The wavefront of the RLS is produced by collimating and re-focussing the output of a laser diode onto a 1 micron pinhole aperture.
Lars A. Selberg, Bruce E. Truax
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The future of wavefront sensing and customization
Ophthalmology Clinics of North America, 2004The possibility of achieving supernormal vision in terms of acuity and contrast has fueled the imagination and creativity of vision researchers to pursue the goal of customized wavefront refractive surgery. This goal is achieved by generating an optimal ablation pattern based on individual anatomical and functional characteristics of the treated eye ...
Shu-I, Yeh, Dimitri T, Azar
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Comparison of wavefront sensing devices
Ophthalmology Clinics of North America, 2004Wavefront measurement is an emerging technology that can evaluate low-order and high-order aberrations. This review compiles the different wavefront sensing devices and compares the most popular Hartmann-Shack aberrometers.
Kerry D, Solomon +3 more
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Holography-based wavefront sensing
Applied Optics, 2007We describe a modal wavefront sensing technique of using multiplexed holographic optical elements (HOEs). The phase pattern of a set of aberrations is angle multiplexed in a HOE, and the correlated information is obtained with a position sensing detector.
F, Ghebremichael +2 more
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Active wavefront sensing and wavefront control with SLMs
SPIE Proceedings, 2004Active systems are becoming more and more prevalent in the the field of optical technology. These systems require not only means of controlling wavefronts but mostly also of sensing wavefronts. This paper shows in four examples how spatial light modulators can be utilized to perform active wavefront sensing and wavefront controlling tasks. The examples
Jan Liesener +3 more
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Prism configurations for wavefront sensing
Applied Optics, 1990This Technical Note mentions two prism configurations for wavefront sensing, both stimulated by works of Roddier. One implements an interferometric pupil-plane sensor, the other a noninterferometric wavefront curvature sensor.
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Asymmetric cryptography based on wavefront sensing
Optics Letters, 2006A system of asymmetric cryptography based on wavefront sensing (ACWS) is proposed for the first time to our knowledge. One of the most significant features of the asymmetric cryptography is that a trapdoor one-way function is required and constructed by analogy to wavefront sensing, in which the public key may be derived from optical parameters, such ...
Xiang, Peng, Hengzheng, Wei, Peng, Zhang
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Properties of coherence-gated wavefront sensing
Journal of the Optical Society of America A, 2007Coherence-gated wavefront sensing (CGWS) allows the determination of wavefront aberrations in strongly scattering tissue and their correction by adaptive optics. This allows, e.g., the restoration of the diffraction limit in light microscopy. Here, we develop a model, based on ray tracing of ballistic light scattered from a set of discrete scatterers ...
Rückel, M., Denk, W.
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Phase retrieval as a means of wavefront sensing
Proceedings of International Conference on Image Processing, 2002The paper discusses how phase retrieval can be employed as a robust technique for estimating the wavefront distortion using a lenslet array. It is shown that the principal problem of phase retrieval, namely divergence is considerably reduced when the aperture is subdivided.
Richard G. Lane, R. Irwan
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Acousto-optic wavefront sensing and reconstruction
Applied Optics, 2008We employ an acousto-optic cell as a tunable-pitch wavefront sensor and study its performance. The index of refraction of two cross-standing waves forms, in the near field, an adjustable array of caustics. These caustics, similar to the lenslets used for Hartmann-Shack sensing, were measured to have an extended focal relief of 200 times their pitch. We
Adir, Stup +3 more
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