Optical tweezers computational toolbox
... Helmholtz equation. Our method of choice is to use a least-squares fit to produce a Helmholtz beam with a far-field matching that expected from the incident beam being focussed by the objective (Nieminen et al. 2003b). At this point, we can write the incident field in terms of a discrete basis set o ...
... Helmholtz equation. Our method of choice is to use a least-squares fit to produce a Helmholtz beam with a far-field matching that expected from the incident beam being focussed by the objective (Nieminen et al. 2003b). At this point, we can write the incident field in terms of a discrete basis set o ...
Optical Materials for LWIR Applications
... Germanium has the largest index of refraction of all of the LWIR materials (4.0), making it much easier to achieve diffraction limited performance. Figure 3 shows spherical aberration of a standard visible BK-7 singlet versus a germanium singlet. Germanium also has extremely low dispersion (Abbe num ...
... Germanium has the largest index of refraction of all of the LWIR materials (4.0), making it much easier to achieve diffraction limited performance. Figure 3 shows spherical aberration of a standard visible BK-7 singlet versus a germanium singlet. Germanium also has extremely low dispersion (Abbe num ...
Polarization directions of noncollinear phase
... B 5 270° does b equal the accustomed result. As A becomes larger than Q, b starts to wrap around past p. To explain this behavior, it is useful to plot a (f, g) map of b as shown in Fig. 3(b). The angles of the dashes at each point (f, g) indicate the polarization direction of downconverted light em ...
... B 5 270° does b equal the accustomed result. As A becomes larger than Q, b starts to wrap around past p. To explain this behavior, it is useful to plot a (f, g) map of b as shown in Fig. 3(b). The angles of the dashes at each point (f, g) indicate the polarization direction of downconverted light em ...
OFC2016-TTD-v3 - School of Electrical Engineering and
... true time delay lines is the beam is squint free, thus it is suitable for broadband applications. The time delays can be realized using electronic delay lines, but with small bandwidth, large size and high loss. Photonics is considered a potential solution to implement true-time delays with large ba ...
... true time delay lines is the beam is squint free, thus it is suitable for broadband applications. The time delays can be realized using electronic delay lines, but with small bandwidth, large size and high loss. Photonics is considered a potential solution to implement true-time delays with large ba ...
Effect of the refractive index change kinetics of
... Phase photosensitive materials are those with the ability to locally change their refractive index when they are exposed to photoactinic radiation. Several types of such materials were developed over the past few decades. Not to produce a survey of phase photosensitive materials, one can cite exampl ...
... Phase photosensitive materials are those with the ability to locally change their refractive index when they are exposed to photoactinic radiation. Several types of such materials were developed over the past few decades. Not to produce a survey of phase photosensitive materials, one can cite exampl ...
IX71/IX81 - Olympus Microscopy Resource Center
... As new fluorochromes are developed and new methods of light excitation and manipulation become more popular for live cell experiments, more and more researchers will require the use of low phototoxicity near-IR wavelengths in addition to the conventional visible spectrum. Olympus has equipped its IX ...
... As new fluorochromes are developed and new methods of light excitation and manipulation become more popular for live cell experiments, more and more researchers will require the use of low phototoxicity near-IR wavelengths in addition to the conventional visible spectrum. Olympus has equipped its IX ...
IOSR Journal of Electronics and Communication Engineering (IOSR-JECE)
... with binary data; an optical signal with positive GVD is assumed, although negative GVD may also be realized as discussed earlier. The appropriate pn code must now be impressed upon these data. One implementation involves placing a transmission-type mask between the grating pair and the feedback mir ...
... with binary data; an optical signal with positive GVD is assumed, although negative GVD may also be realized as discussed earlier. The appropriate pn code must now be impressed upon these data. One implementation involves placing a transmission-type mask between the grating pair and the feedback mir ...
Fast-Fourier-domain delay line for in vivo optical coherence
... 共decreased nonlinearity兲 and scan rate. A scan rate of 2.58 kHz was achieved with the combination of a commercially available polygonal mirror array 共similar to the one used in this study兲 and a parallelepiped,10 but this system also suffers from high group-delay nonlinearity. A rotating prism array ...
... 共decreased nonlinearity兲 and scan rate. A scan rate of 2.58 kHz was achieved with the combination of a commercially available polygonal mirror array 共similar to the one used in this study兲 and a parallelepiped,10 but this system also suffers from high group-delay nonlinearity. A rotating prism array ...
How much mathematics should optics students know
... At a very first stage students may not know the conditions under which geometrical optics is valid, but, as soon as diffraction is introduced, this point must be clearly stated, by using the appropriate mathematics. Here it suffices to say that light propagates in free space or homogeneous media and ...
... At a very first stage students may not know the conditions under which geometrical optics is valid, but, as soon as diffraction is introduced, this point must be clearly stated, by using the appropriate mathematics. Here it suffices to say that light propagates in free space or homogeneous media and ...
AOK2-UP01 - February 2, 2015
... Through our partnership with Boston Micromachines Corporation (BMC), Thorlabs is pleased to offer BMC's Mini- and Multi- Deformable Micro-electro-mechanical (MEMS) based mirrors as part of our adaptive optics kits. These deformable mirrors (DMs) are ideal for advanced optical wavefront control; they ...
... Through our partnership with Boston Micromachines Corporation (BMC), Thorlabs is pleased to offer BMC's Mini- and Multi- Deformable Micro-electro-mechanical (MEMS) based mirrors as part of our adaptive optics kits. These deformable mirrors (DMs) are ideal for advanced optical wavefront control; they ...
Spectrally Efficient OFDM-Transmission over Single-Mode Fiber Using Direct Detection Student Member Member, IEEE
... broadcasting and digital-video broadcasting [1-2]. Due to its high spectral efficiency and robustness towards channel impairments, such as inter-symbolinterference (ISI), Orthogonal frequency division multiplexing (OFDM) becomes an intriguing candidate for optical high-speed transmission. Recently, ...
... broadcasting and digital-video broadcasting [1-2]. Due to its high spectral efficiency and robustness towards channel impairments, such as inter-symbolinterference (ISI), Orthogonal frequency division multiplexing (OFDM) becomes an intriguing candidate for optical high-speed transmission. Recently, ...
Polarimetric imaging of crystals - Werner Kaminsky
... 3.1. Jones calculus A variety of methods have been developed for tracking the polarization state of light as it passes through successive optical elements and complex samples. These are the Poincaré sphere,20 the Mueller calculus,21 and the Jones calculus.22 These tools, and their relative advantag ...
... 3.1. Jones calculus A variety of methods have been developed for tracking the polarization state of light as it passes through successive optical elements and complex samples. These are the Poincaré sphere,20 the Mueller calculus,21 and the Jones calculus.22 These tools, and their relative advantag ...
Lecture 1(2) -Sources in diagnostic Rad.– Fluoroscopy - gnssn
... Fluoroscopic Equipment (cont) Direct fluoroscopy should no longer be used. • “Direct” fluoroscopy does not use electronic image amplification. The real-time image is viewed on a fluorescent screen in a completely darkened room and requires the fluoroscopist to dark adapt for approximately 20 minute ...
... Fluoroscopic Equipment (cont) Direct fluoroscopy should no longer be used. • “Direct” fluoroscopy does not use electronic image amplification. The real-time image is viewed on a fluorescent screen in a completely darkened room and requires the fluoroscopist to dark adapt for approximately 20 minute ...
Wavefront retrieval of amplified femtosecond
... In the case of ultra-short pulses, the accurate study of the spectral characteristics of the SH beam requires to solve the wave equations governing the process [17–19]. However, although Eq. (1) was obtained for monochromatic plane waves, it still can be used in a first order approximation to estima ...
... In the case of ultra-short pulses, the accurate study of the spectral characteristics of the SH beam requires to solve the wave equations governing the process [17–19]. However, although Eq. (1) was obtained for monochromatic plane waves, it still can be used in a first order approximation to estima ...
Plane-wave scattering by a dielectric circular cylinder
... that for the isolated cylinder.16 By knowledge of the c m and d m coefficients (m 5 0, 61, 62, ...), the scattering problem is exactly solved. Of course, since the outlined procedure involves infinite series, some truncation criterion is to be adopted. As we shall see in the next section, one can us ...
... that for the isolated cylinder.16 By knowledge of the c m and d m coefficients (m 5 0, 61, 62, ...), the scattering problem is exactly solved. Of course, since the outlined procedure involves infinite series, some truncation criterion is to be adopted. As we shall see in the next section, one can us ...
Optical aberration
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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.