Optical path function.
... Image quality is essential for achieving high energy and spatial resolution Æ knowledge of aberrations theory is necessary It shows what the different aberration terms are and how they play a role in the image formation Æ it teaches how aberrations can be ...
... Image quality is essential for achieving high energy and spatial resolution Æ knowledge of aberrations theory is necessary It shows what the different aberration terms are and how they play a role in the image formation Æ it teaches how aberrations can be ...
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 ...
Green's function formulation for third-harmonic generation microscopy
... Third-harmonic generation from an interface perpendicular to the optical axis was illustrated by Barad et al.7 With the Green’s function model we are able to investigate THG from interfaces of different orientations. Figure 4 shows that THG signals can arise from an interface perpendicular or parall ...
... Third-harmonic generation from an interface perpendicular to the optical axis was illustrated by Barad et al.7 With the Green’s function model we are able to investigate THG from interfaces of different orientations. Figure 4 shows that THG signals can arise from an interface perpendicular or parall ...
Expressive Chromatic Accumulation Buffering for Defocus Blur
... to synthetic images, and many graphics studies have been devoted to this direction. The previous studies to build complete lens systems based on the formal lens specification have led us to physically faithful images with ray tracing or path tracing [11, 26]. Despite their realism, underlying physic ...
... to synthetic images, and many graphics studies have been devoted to this direction. The previous studies to build complete lens systems based on the formal lens specification have led us to physically faithful images with ray tracing or path tracing [11, 26]. Despite their realism, underlying physic ...
Optically induced forces in scanning probe microscopy
... As technology relies more and more on the design and engineering of structures which are nanoscale in two or three dimensions, it becomes increasingly important to have metrology tools capable of characterizing the properties of the constituent materials at the relevant length scales. In the field o ...
... As technology relies more and more on the design and engineering of structures which are nanoscale in two or three dimensions, it becomes increasingly important to have metrology tools capable of characterizing the properties of the constituent materials at the relevant length scales. In the field o ...
Photoinduced handedness switching in terahertz chiral metamolecules ARTICLE
... chirality. Similar approaches of incorporating semiconductors into subwavelength resonators have been used to actively manipulate the electromagnetic resonances of metamaterials by photoexcitation or electric bias23–26. The chirality switching in the above terahertz metamaterials was experimentally ...
... chirality. Similar approaches of incorporating semiconductors into subwavelength resonators have been used to actively manipulate the electromagnetic resonances of metamaterials by photoexcitation or electric bias23–26. The chirality switching in the above terahertz metamaterials was experimentally ...
Theory and Practice of Scanning Optical Microscopy - X
... focal plane and along the optic axis for an annulus of finite width has been calculated by Steward [2.4, 2.5] who also showed [2.5J that the intensity distribution along the optic axis is stretched out relative to that of a circular lens, that is, the depth of field is increased. This increased dept ...
... focal plane and along the optic axis for an annulus of finite width has been calculated by Steward [2.4, 2.5] who also showed [2.5J that the intensity distribution along the optic axis is stretched out relative to that of a circular lens, that is, the depth of field is increased. This increased dept ...
Achromatic correction of diffractive dispersion in white light SLM
... excluded from the discussion and only the phase-only modulation implemented with linearly polarized light will be considered. In this case, the action of the SLM can be defined by the function t ∝ exp[iΦ(r⊥ , λ0 )], where r⊥ determines the position on an active surface of the SLM and λ0 is the chose ...
... excluded from the discussion and only the phase-only modulation implemented with linearly polarized light will be considered. In this case, the action of the SLM can be defined by the function t ∝ exp[iΦ(r⊥ , λ0 )], where r⊥ determines the position on an active surface of the SLM and λ0 is the chose ...
Limits of lithography - Proceedings of the IEEE
... of the gates and can, in principle, achieve linewidths as small as half that achieved using conventional masks. The “trim” mask is created using software that compares the gate-level pattern with that of the underlying thinox layer to isolate the gate features in the pattern data. The PSM pattern is ...
... of the gates and can, in principle, achieve linewidths as small as half that achieved using conventional masks. The “trim” mask is created using software that compares the gate-level pattern with that of the underlying thinox layer to isolate the gate features in the pattern data. The PSM pattern is ...
Transformational Plasmon Optics Yongmin Liu, Thomas Zentgraf, Guy Bartal,
... persive materials are used to realize the transformed dielectric material. We numerically calculate the scattering loss of the SPPs propagating for the geometry shown in parts b and e of Figure 1 for wavelengths from 450 to 850 nm. Before the transformation, i.e., for the bare air-Ag interface, the ...
... persive materials are used to realize the transformed dielectric material. We numerically calculate the scattering loss of the SPPs propagating for the geometry shown in parts b and e of Figure 1 for wavelengths from 450 to 850 nm. Before the transformation, i.e., for the bare air-Ag interface, the ...
Transformational Plasmon Optics Yongmin Liu, Thomas Zentgraf, Guy Bartal,
... persive materials are used to realize the transformed dielectric material. We numerically calculate the scattering loss of the SPPs propagating for the geometry shown in parts b and e of Figure 1 for wavelengths from 450 to 850 nm. Before the transformation, i.e., for the bare air-Ag interface, the ...
... persive materials are used to realize the transformed dielectric material. We numerically calculate the scattering loss of the SPPs propagating for the geometry shown in parts b and e of Figure 1 for wavelengths from 450 to 850 nm. Before the transformation, i.e., for the bare air-Ag interface, the ...
J Comp Physiol A (1993) 173:143-149
... (Fig. 3, upper inset and upper curve). In the region of the microvillar zone, 15 µm behind the lens, stripes parallel to the long axis of the body were transmitted down to a spatial wavelength averaging 56°. With patterns rotated by 90°, the (extrapolated) limiting value was ca. 135° spatial wavelen ...
... (Fig. 3, upper inset and upper curve). In the region of the microvillar zone, 15 µm behind the lens, stripes parallel to the long axis of the body were transmitted down to a spatial wavelength averaging 56°. With patterns rotated by 90°, the (extrapolated) limiting value was ca. 135° spatial wavelen ...
Propagation and focusing of optical fields
... with the z axis. From this equation we can directly find the correspondence between the numerical aperture (NA = n sin θ) and the beam angle as NA ≈ 2n/kwo . Here we used the fact that in the paraxial approximation, θ is restricted to small beam angles. Another property of the paraxial Gaussian beam ...
... with the z axis. From this equation we can directly find the correspondence between the numerical aperture (NA = n sin θ) and the beam angle as NA ≈ 2n/kwo . Here we used the fact that in the paraxial approximation, θ is restricted to small beam angles. Another property of the paraxial Gaussian beam ...
Applications of scanning optical microscopy in materials science to
... the optical system to transmit optical frequencies. It is well known from the theory of electronic circuits that Fourier analysis of an electronic system shows how accurately it responds to, for example, a unit step function. If the system is capable of transmitting high spatial frequencies then the ...
... the optical system to transmit optical frequencies. It is well known from the theory of electronic circuits that Fourier analysis of an electronic system shows how accurately it responds to, for example, a unit step function. If the system is capable of transmitting high spatial frequencies then the ...
full text pdf
... “tunes” the refractive index of the silk. This effect has previously been utilized to measure the principal refractive indices of these birefringent silks [9]. The analytical procedure presented in this paper is based on the key observation that, even with careful index matching, the silks cannot be ...
... “tunes” the refractive index of the silk. This effect has previously been utilized to measure the principal refractive indices of these birefringent silks [9]. The analytical procedure presented in this paper is based on the key observation that, even with careful index matching, the silks cannot be ...
Light propagates in the form of waves
... Since light is an electromagnetic wave, light can be described by the same theoretical principles that govern all forms of electromagnetic radiation. Electromagnetic radiation propagates in the form of two coupled vector waves, an electric-field wave and a magnetic-field wave. Although light is des ...
... Since light is an electromagnetic wave, light can be described by the same theoretical principles that govern all forms of electromagnetic radiation. Electromagnetic radiation propagates in the form of two coupled vector waves, an electric-field wave and a magnetic-field wave. Although light is des ...
Recent Developments in Optofluidic Lens Technology
... on a global scale and perfectly smooth on a small scale of, say, λ{10 (λ: typical wavelength of visible light), liquid surfaces in equilibrium are thus perfectly spherical and perfectly smooth by the laws of physics. While some intrinsic roughness due to thermally excited fluctuating capillary waves ...
... on a global scale and perfectly smooth on a small scale of, say, λ{10 (λ: typical wavelength of visible light), liquid surfaces in equilibrium are thus perfectly spherical and perfectly smooth by the laws of physics. While some intrinsic roughness due to thermally excited fluctuating capillary waves ...
Hyperbolic metamaterials and their applications Ferrari , , Dominic Lepage
... anisotropic dispersion, termed hyperbolic. The interaction of these metamaterials with their nearfield results in applications ranging from sub-wavelength light manipulation and imaging to spontaneous and thermal emission modification. The present compendium reviews the conceptual and experimental mil ...
... anisotropic dispersion, termed hyperbolic. The interaction of these metamaterials with their nearfield results in applications ranging from sub-wavelength light manipulation and imaging to spontaneous and thermal emission modification. The present compendium reviews the conceptual and experimental mil ...
IOSR Journal of Applied Physics (IOSR-JAP) e-ISSN: 2278-4861.
... The closed aperture transmittance data depicted in Fig 8 confirms the self defocusing nature as prefocal transmittance peak is followed by the postfocal transmittance valley, indicating negative index of refraction. The negative index of refraction of doped ADP crystal makes it prominent material fo ...
... The closed aperture transmittance data depicted in Fig 8 confirms the self defocusing nature as prefocal transmittance peak is followed by the postfocal transmittance valley, indicating negative index of refraction. The negative index of refraction of doped ADP crystal makes it prominent material fo ...
Analysis And Design Of Wide-angle Foveated Optical
... Figure 4: Cone and rod density versus angular field [4]. .................................................. 11 Figure 5: The SLM corrects the wavefront aberration at the field point of interest. ........ 13 Figure 6: Real-time wavefront correction in adaptive optics................................ ...
... Figure 4: Cone and rod density versus angular field [4]. .................................................. 11 Figure 5: The SLM corrects the wavefront aberration at the field point of interest. ........ 13 Figure 6: Real-time wavefront correction in adaptive optics................................ ...
Mirrors and Lenses - mrphysicsportal.net
... d. What is the height of the image? 3. The image of an object is 30.0 cm from a concave mirror with a 20.0-cm radius of curvature. Locate the object. ~ 4. An old "magic trick" used a concave mirror to project an image the same size as the object and at the same distance from the mirror. If the objec ...
... d. What is the height of the image? 3. The image of an object is 30.0 cm from a concave mirror with a 20.0-cm radius of curvature. Locate the object. ~ 4. An old "magic trick" used a concave mirror to project an image the same size as the object and at the same distance from the mirror. If the objec ...
Diffuse optical imaging
... absorption spectra of oxy- and deoxyhaemoglobin (HbO and HHb, respectively) to assess blood oxygenation. This demonstrated that biomedical optics could provide clinically useful information by examination of the absorption of tissue, provided that the confounding effects of scatter were minimized, b ...
... absorption spectra of oxy- and deoxyhaemoglobin (HbO and HHb, respectively) to assess blood oxygenation. This demonstrated that biomedical optics could provide clinically useful information by examination of the absorption of tissue, provided that the confounding effects of scatter were minimized, b ...
Holography
... It turns out that it is more favorable to shift either the holographic layer or the object sideways. Laser beam, object, and hologram are not on the same axis anymore. The hologram represents the outer area of a fresnel zone lens. Again a virtual and a real image are formed during construction. The ...
... It turns out that it is more favorable to shift either the holographic layer or the object sideways. Laser beam, object, and hologram are not on the same axis anymore. The hologram represents the outer area of a fresnel zone lens. Again a virtual and a real image are formed during construction. The ...
Chapter 11: The Eye and Light - San Juan Unified School District
... Figure 1, or the Sun, emits light waves. These waves spread out in all directions. Sometimes, however, it is easier to think of light in a different way. A light ray is a narrow beam of light that travels in a straight line. In Figure 1, the light rays emitted by the candle are represented by arrows ...
... Figure 1, or the Sun, emits light waves. These waves spread out in all directions. Sometimes, however, it is easier to think of light in a different way. A light ray is a narrow beam of light that travels in a straight line. In Figure 1, the light rays emitted by the candle are represented by arrows ...
Black Jack Gratis Spielen Ohne Anmeldung
... Figure 1, or the Sun, emits light waves. These waves spread out in all directions. Sometimes, however, it is easier to think of light in a different way. A light ray is a narrow beam of light that travels in a straight line. In Figure 1, the light rays emitted by the candle are represented by arrows ...
... Figure 1, or the Sun, emits light waves. These waves spread out in all directions. Sometimes, however, it is easier to think of light in a different way. A light ray is a narrow beam of light that travels in a straight line. In Figure 1, the light rays emitted by the candle are represented by arrows ...
Superlens
A practical superlens, or super lens, is a lens which uses metamaterials to go beyond the diffraction limit. The diffraction limit is a feature of conventional lenses and microscopes that limits the fineness of their resolution. Many lens designs have been proposed that go beyond the diffraction limit in some way, but there are constraints and obstacles involved in realizing each of them.