Illusion Optics: The Optical Transformation of an Object into Another
... various novel applications, the most fascinating is a cloaking device designed to bend light around a concealed region, rendering any object inside the region ‘‘invisible’’ [1–10]. Cloaking can be regarded as creating an illusion of free space. In this Letter, we discuss a more generalized concept o ...
... various novel applications, the most fascinating is a cloaking device designed to bend light around a concealed region, rendering any object inside the region ‘‘invisible’’ [1–10]. Cloaking can be regarded as creating an illusion of free space. In this Letter, we discuss a more generalized concept o ...
Technical Digest Post-Deadline Papers
... We propose the use of a new method in which a grating reduces stray light from adjacent layers. A schematic of the optical pickup is shown in Fig. 1. A focusing lens, a grating, and a reflector are attached in the return path from a multilayer disc to a normal pickup. The reflection from the multi-l ...
... We propose the use of a new method in which a grating reduces stray light from adjacent layers. A schematic of the optical pickup is shown in Fig. 1. A focusing lens, a grating, and a reflector are attached in the return path from a multilayer disc to a normal pickup. The reflection from the multi-l ...
Experimental study on Extremely-Thin-Body In0
... Analysis of strain relaxation of SiGe layer The amount of strain in the SiGe layer in the fabricated device was evaluated by Raman spectroscopy. It is well known that the biaxial strain is partially relaxed when a biaxially strained layer is etched into a narrow mesa with submicron width such as op ...
... Analysis of strain relaxation of SiGe layer The amount of strain in the SiGe layer in the fabricated device was evaluated by Raman spectroscopy. It is well known that the biaxial strain is partially relaxed when a biaxially strained layer is etched into a narrow mesa with submicron width such as op ...
Acousto-Optic Devices and Applications
... These devices have been used in optical systems for light-beam control and signalprocessing applications. Historically, the diffraction of light by acoustic waves was first predicted by Brillouin1 in 1922. Ten years later, Debye and Sears2 and Lucas and Biquard3 experimentally observed the effect. I ...
... These devices have been used in optical systems for light-beam control and signalprocessing applications. Historically, the diffraction of light by acoustic waves was first predicted by Brillouin1 in 1922. Ten years later, Debye and Sears2 and Lucas and Biquard3 experimentally observed the effect. I ...
HoloPy Documentation
... If the one that you tried gave an ImportError, you should restart your kernel and try another. Note that there can only be one matplotlib backend per ipython kernel, so you have the best chance of success if you restart your kernel and immediately enter the %matplotlib command before doing anything ...
... If the one that you tried gave an ImportError, you should restart your kernel and try another. Note that there can only be one matplotlib backend per ipython kernel, so you have the best chance of success if you restart your kernel and immediately enter the %matplotlib command before doing anything ...
Inverse dispersion engineering in silicon waveguides
... different examples of the optimization processes with different flattened dispersion profiles over 350 nm, in the range 1.55 µm ≤ λ ≤ 1.90 µm as target, namely, β2 (ω) = 0, ±0.2 and ±0.8 ps2 m−1 . For all five cases, we start from the same waveguide configuration [11], hence showing this choice is n ...
... different examples of the optimization processes with different flattened dispersion profiles over 350 nm, in the range 1.55 µm ≤ λ ≤ 1.90 µm as target, namely, β2 (ω) = 0, ±0.2 and ±0.8 ps2 m−1 . For all five cases, we start from the same waveguide configuration [11], hence showing this choice is n ...
Chapter 4 Optical Resonator
... 4 matrix. (a) Determine the 4 x 4 ray-transfer matrix of a distance d in free space. (b) Determine the 4 X 4 ray-transfer matrix of a thin cylindrical lens with focal length f oriented in the y direction. The cylindrical lens has focal length f for rays in the y-z plane, and no focusing power for ra ...
... 4 matrix. (a) Determine the 4 x 4 ray-transfer matrix of a distance d in free space. (b) Determine the 4 X 4 ray-transfer matrix of a thin cylindrical lens with focal length f oriented in the y direction. The cylindrical lens has focal length f for rays in the y-z plane, and no focusing power for ra ...
1.5% root-mean-square flat-intensity laser beam
... Good examples of flat-top beams of very wide diameter (as compared to the equivalent focused Gaussian) are those results that use an IFTA or analytic solution to generate a DOE having a large parabolic phase component [14–16]. Although there is discussion as to the best IFTA to use to produce the lo ...
... Good examples of flat-top beams of very wide diameter (as compared to the equivalent focused Gaussian) are those results that use an IFTA or analytic solution to generate a DOE having a large parabolic phase component [14–16]. Although there is discussion as to the best IFTA to use to produce the lo ...
Optical coherence tomography (OCT): a review
... from (9) that the spatial extent of width of the point-spread function; therefore, in this onedimensional model the coherence length is an appropriate measure of the axial resolution of the OCT system. In the more general situation in which a two-dimensional cross-sectional image is built up from mu ...
... from (9) that the spatial extent of width of the point-spread function; therefore, in this onedimensional model the coherence length is an appropriate measure of the axial resolution of the OCT system. In the more general situation in which a two-dimensional cross-sectional image is built up from mu ...
Use of beam parameters in optical component testing
... evaluate the beam quality, leading to a quick and accurate measure of the effect of a given optic on the performance of the optical system. The problem is that the calculation of the beam parameters must be performed in an accurate manner. Since estimation of these parameters may involve a series of ...
... evaluate the beam quality, leading to a quick and accurate measure of the effect of a given optic on the performance of the optical system. The problem is that the calculation of the beam parameters must be performed in an accurate manner. Since estimation of these parameters may involve a series of ...
Simultaneous spatial and temporal focusing: A route towards
... In contrast to the single grating configuration presented in Figure 1, the parallel grating setup induces a temporal chirp of the pulse, which is commonly compensated by pre-chirping the input pulse via adjusting the compressor gratings of the laser system or by means of an additional external pulse ...
... In contrast to the single grating configuration presented in Figure 1, the parallel grating setup induces a temporal chirp of the pulse, which is commonly compensated by pre-chirping the input pulse via adjusting the compressor gratings of the laser system or by means of an additional external pulse ...
High-performance holographic technologies for fluid
... optics and imaging) needs to be adequate to characterize the complex fluid flows realized by sophisticated mechanical and motion-control technologies (e.g. wind tunnels, laboratory-scale mechanical setups, etc.). This situation is similar to digital holographic storage, which relies on several enablin ...
... optics and imaging) needs to be adequate to characterize the complex fluid flows realized by sophisticated mechanical and motion-control technologies (e.g. wind tunnels, laboratory-scale mechanical setups, etc.). This situation is similar to digital holographic storage, which relies on several enablin ...
Clutter elimination for deep clinical optoacoustic imaging using
... by the probe at an angle where elevational sensitivity is low, can obscure the weak OA signals from structures deep inside the tissue. Echo clutter (Fig. 2b) may be generated by the same OA transients that cause direct clutter, but via acoustic backscattering at echogenic structures located inside t ...
... by the probe at an angle where elevational sensitivity is low, can obscure the weak OA signals from structures deep inside the tissue. Echo clutter (Fig. 2b) may be generated by the same OA transients that cause direct clutter, but via acoustic backscattering at echogenic structures located inside t ...
optical properties of skin, subcutaneous, and muscle tissues
... accuracy to be achieved for all the parameters being measured, provided the necessary computer time is available. An error of 3% or less is considered acceptable.30 Also, the method may be used to directly correct experimental ¯ndings obtained with the aid of integrating spheres. The term \doubling" ...
... accuracy to be achieved for all the parameters being measured, provided the necessary computer time is available. An error of 3% or less is considered acceptable.30 Also, the method may be used to directly correct experimental ¯ndings obtained with the aid of integrating spheres. The term \doubling" ...
New initiatives - Major Instrumentation
... 500 mm diameter fiber fed by two micro-lenses with spherical surfaces. ...
... 500 mm diameter fiber fed by two micro-lenses with spherical surfaces. ...
Resonant-wavelength control and optical
... other hand, Wenzel’s effective-frequency method [10] is based on a complex variational functional from which he established effective frequencies for each region to include dispersion effects. Our S-EIM is a novel variant of the EIM that also takes dispersion effects into consideration. These are im ...
... other hand, Wenzel’s effective-frequency method [10] is based on a complex variational functional from which he established effective frequencies for each region to include dispersion effects. Our S-EIM is a novel variant of the EIM that also takes dispersion effects into consideration. These are im ...
Optical aberration
.svg?width=300)
An optical aberration is a departure of the performance of an optical system from the predictions of paraxial optics. In an imaging system, it occurs when light from one point of an object does not converge into (or does not diverge from) a single point after transmission through the system. Aberrations occur because the simple paraxial theory is not a completely accurate model of the effect of an optical system on light, rather than due to flaws in the optical elements.Aberration leads to blurring of the image produced by an image-forming optical system. Makers of optical instruments need to correct optical systems to compensate for aberration.The articles on reflection, refraction and caustics discuss the general features of reflected and refracted rays.