Fourier domain optical coherence tomography with an
... into Polymethyl-methacrylate (PMMA) on an E-beam machine, and then used in a stepper as a phase mask to create an analog axicon profile on a silica wafer. It was then developed and etched into the silica wafer. The fabricated axicon picture is shown in Fig. 3 (a). We also analyzed the etched axicon ...
... into Polymethyl-methacrylate (PMMA) on an E-beam machine, and then used in a stepper as a phase mask to create an analog axicon profile on a silica wafer. It was then developed and etched into the silica wafer. The fabricated axicon picture is shown in Fig. 3 (a). We also analyzed the etched axicon ...
Document
... 3. Spatiotemporal field correlations 3.1. Spatiotemporal correlation function. Coherence volume. All optical fields in practice fluctuate randomly in both time and space and are subject to a statistical description [1]. These fluctuations depend on both the emission process (primary sources) and p ...
... 3. Spatiotemporal field correlations 3.1. Spatiotemporal correlation function. Coherence volume. All optical fields in practice fluctuate randomly in both time and space and are subject to a statistical description [1]. These fluctuations depend on both the emission process (primary sources) and p ...
Microscopy Overview
... Optical microscope, light microscope, electron microscope, probe microscope, nearfield microscope, acoustic microscope, scanning microscope, confocal microscope, microscope objective, resolution, Köhler illumination, Abbe theory, Rayleigh ...
... Optical microscope, light microscope, electron microscope, probe microscope, nearfield microscope, acoustic microscope, scanning microscope, confocal microscope, microscope objective, resolution, Köhler illumination, Abbe theory, Rayleigh ...
Looking through walls and around corners with
... geometry, but by replacing the medium thickness, L, with the scattering mean-free-path l* . The stronger the scattering (shorter mean-free-path, and light penetration depth) the larger is the FOV. Interestingly, light at any incident angle can be used for imaging. The optimized phase-pattern can be ...
... geometry, but by replacing the medium thickness, L, with the scattering mean-free-path l* . The stronger the scattering (shorter mean-free-path, and light penetration depth) the larger is the FOV. Interestingly, light at any incident angle can be used for imaging. The optimized phase-pattern can be ...
System for observing interference phenomenon: In the previous
... In this geometry, the reflected ray 1, travels an extra optical path, a compensating plate G2 of same thickness as plate G1 ) is inserted in the path of ray 2 such that G2 is parallel to G1 . This introduces the same optical path in glass medium for ray 2 as ray 1 travels in plate G1 (therefore is c ...
... In this geometry, the reflected ray 1, travels an extra optical path, a compensating plate G2 of same thickness as plate G1 ) is inserted in the path of ray 2 such that G2 is parallel to G1 . This introduces the same optical path in glass medium for ray 2 as ray 1 travels in plate G1 (therefore is c ...
Lenses, the eye and other applications of light
... On the diagram, draw lines to show how the light passes through each lens into the region within the dotted lines. ...
... On the diagram, draw lines to show how the light passes through each lens into the region within the dotted lines. ...
Imaging properties of supercritical angle
... image space when the field distribution in the focal region of the sample space is known, see for example Ref. [7]. However, this approach fails when the involved optics cannot be described by some simple relationship between plane wave modes in sample space and in image space. In that case, one usu ...
... image space when the field distribution in the focal region of the sample space is known, see for example Ref. [7]. However, this approach fails when the involved optics cannot be described by some simple relationship between plane wave modes in sample space and in image space. In that case, one usu ...
52.3: An Improved Polarizing Beamsplitter LCOS Projection
... of this structure on a plane plate of glass reduces the precision surface count from six to two. The second conclusion is that any adverse impact of astigmatism introduced to the lens by the tilted plate can be offset by other subtle changes in the lens design enabled by the absence of the high inde ...
... of this structure on a plane plate of glass reduces the precision surface count from six to two. The second conclusion is that any adverse impact of astigmatism introduced to the lens by the tilted plate can be offset by other subtle changes in the lens design enabled by the absence of the high inde ...
Lecture 18
... microscope can be characterized by the modulation transfer function (MTF) • MTF is measurement of microscope's ability to transfer contrast from the specimen to the image plane at specific resolution. • Incorporates resolution and contrast into one specification ...
... microscope can be characterized by the modulation transfer function (MTF) • MTF is measurement of microscope's ability to transfer contrast from the specimen to the image plane at specific resolution. • Incorporates resolution and contrast into one specification ...
bright field microscopy
... • Most commonly used microscopy imaging technique is bright field microscopy, where light is either passed through or reflected off a specimen • Biologists and histologists have used counter staining for over one hundred years; and this helps to differentiate the various tissues and organelles that ...
... • Most commonly used microscopy imaging technique is bright field microscopy, where light is either passed through or reflected off a specimen • Biologists and histologists have used counter staining for over one hundred years; and this helps to differentiate the various tissues and organelles that ...
Designing an Experimental Prototype to Support Geometric Optics
... with materials of different refractive index. In this research only centered spherical surfaces with an imaginary axis (optical axis) joining the vertices of the surfaces in a straight line were considered. A spherical optical system commonly used might be lenses, transparent objects (usually glass) ...
... with materials of different refractive index. In this research only centered spherical surfaces with an imaginary axis (optical axis) joining the vertices of the surfaces in a straight line were considered. A spherical optical system commonly used might be lenses, transparent objects (usually glass) ...
A new optical configuration in speckle interferometry for contouring
... interferometric configuration is shown in Fig. 1. The object to be contoured is illuminated normally with a collimated laser beam. The scattered speckle fields are obon either side of the served symmetrically at an angle surface normal via a pair of mirrors ŽM 1 and M 3 . and ŽM 2 and M 4 . placed i ...
... interferometric configuration is shown in Fig. 1. The object to be contoured is illuminated normally with a collimated laser beam. The scattered speckle fields are obon either side of the served symmetrically at an angle surface normal via a pair of mirrors ŽM 1 and M 3 . and ŽM 2 and M 4 . placed i ...
Document
... specimen presented here, a nonlinear mechanism is employed, the resolving power of microscopes can be extended, virtually indefinitely [4]. ...
... specimen presented here, a nonlinear mechanism is employed, the resolving power of microscopes can be extended, virtually indefinitely [4]. ...
The Compound Microscope
... lens or a combination of lenses to magnify and resolve the fine details of an object. • The earliest methods for examining physical evidence relied solely on the microscope. • The magnified image seen by looking through a lens is known as a virtual image, whereas an image viewed directly is known as ...
... lens or a combination of lenses to magnify and resolve the fine details of an object. • The earliest methods for examining physical evidence relied solely on the microscope. • The magnified image seen by looking through a lens is known as a virtual image, whereas an image viewed directly is known as ...
Slide 1
... Abstract: Acousto-optic (AO) imaging is a new dual-wave modality that combines ultrasound with diffuse light to achieve deep-tissue imaging of optical properties with the spatial resolution of ultrasound. In this technique, the sample is simultaneously insonified by an ultrasound beam and illuminate ...
... Abstract: Acousto-optic (AO) imaging is a new dual-wave modality that combines ultrasound with diffuse light to achieve deep-tissue imaging of optical properties with the spatial resolution of ultrasound. In this technique, the sample is simultaneously insonified by an ultrasound beam and illuminate ...
Isotropic Diffraction-Limited Focusing Using a Single Objective Lens
... were essentially interested in the reduction of the spot transverse dimensions and overlooked the axial dimension along the normal to the lens (the optical axis). Except for the evanescent spots that are bound to a surface [3], the axial extension is at least 3 times larger than the transverse ones ...
... were essentially interested in the reduction of the spot transverse dimensions and overlooked the axial dimension along the normal to the lens (the optical axis). Except for the evanescent spots that are bound to a surface [3], the axial extension is at least 3 times larger than the transverse ones ...
To determine the wavelength of a monochromatic source of light
... plate of glass by suitable grinding and polishing, the obtuse angle of the prism (which is only slightly less than 1800). The optical bench consists of two metal rails graduated accurately in millimeters. The bench is provided with the three metal uprights which can slide along the rails and their p ...
... plate of glass by suitable grinding and polishing, the obtuse angle of the prism (which is only slightly less than 1800). The optical bench consists of two metal rails graduated accurately in millimeters. The bench is provided with the three metal uprights which can slide along the rails and their p ...
10_Lenses - Savita Pall and Chemistry
... axis and on emerging from the lens after refraction , either passes through the principal focus F of the converging lens, or appears to come from the principal focus F of a diverging lens. Ray 2: starts at the top of the object and passes through the optical centre, O, of the lens. Because the sides ...
... axis and on emerging from the lens after refraction , either passes through the principal focus F of the converging lens, or appears to come from the principal focus F of a diverging lens. Ray 2: starts at the top of the object and passes through the optical centre, O, of the lens. Because the sides ...
The Optical Design of Miniaturized Microscope Objective for CARS
... efficiently in a collinear excitation geometry with tight focusing and without time delay between pump (ωp) and Stokes beam (ωs). If the frequency difference, ωp-ωs, matches molecular-specific frequency resonantly, a blue-shifted and intense CARS signal is emitted at ωAS = 2ωp-ωs. From this CARS sig ...
... efficiently in a collinear excitation geometry with tight focusing and without time delay between pump (ωp) and Stokes beam (ωs). If the frequency difference, ωp-ωs, matches molecular-specific frequency resonantly, a blue-shifted and intense CARS signal is emitted at ωAS = 2ωp-ωs. From this CARS sig ...
The Wave-Front Aberration Polynomial
... Ideal imaging systems perform point-to-point imaging. This requires that a spherical wave front expanding from each object point (o) is converted to a spherical wave front converging to a corresponding image point (o’). However, real optical systems produce an imperfect “aberrated” image. The aberra ...
... Ideal imaging systems perform point-to-point imaging. This requires that a spherical wave front expanding from each object point (o) is converted to a spherical wave front converging to a corresponding image point (o’). However, real optical systems produce an imperfect “aberrated” image. The aberra ...
Single-pixel infrared and visible microscope
... rate and N is the number of a pixels in the image. For our particular DMD, the pattern display rate of 22 kHz results in a frame rate of 10 Hz at 32 × 32 and 0.6 Hz at 128 × 128. We expand upon this “standard” operational mode to provide a user-friendly “adaptive” mode that provides the benefits of ...
... rate and N is the number of a pixels in the image. For our particular DMD, the pattern display rate of 22 kHz results in a frame rate of 10 Hz at 32 × 32 and 0.6 Hz at 128 × 128. We expand upon this “standard” operational mode to provide a user-friendly “adaptive” mode that provides the benefits of ...
Stops, Pupils, Field Optics and Cameras
... through the aperture stop. The PMT does not have an image of the star, but rather an image of the objective. So, if the star wanders around in the field stop, the PMT will remain uniformly illuminated (but from different angles). ...
... through the aperture stop. The PMT does not have an image of the star, but rather an image of the objective. So, if the star wanders around in the field stop, the PMT will remain uniformly illuminated (but from different angles). ...
PPT Version - OMICS International
... published 3 book chapters and over 100 peer-reviewed papers that are highly cited with an h-index of ...
... published 3 book chapters and over 100 peer-reviewed papers that are highly cited with an h-index of ...
Optics Studio Manual - Department of Physics
... lenses, telescopes, microscopes, and other imaging devices, polarization, and interference and diffraction were all well understood and used before the electromagnetic theory of light was espoused by Maxwell. It is important that you view optics as phenomena that can be understood and applied as suc ...
... lenses, telescopes, microscopes, and other imaging devices, polarization, and interference and diffraction were all well understood and used before the electromagnetic theory of light was espoused by Maxwell. It is important that you view optics as phenomena that can be understood and applied as suc ...
4F system 4F system with defocused input 4F system with defocused
... – narrow PSF in the lateral direction (PSF width ~1/NA) • sharp lateral features – narrow PSF in longitudinal direction (PSF depth ~1/NA2) • poor depth of field • low NA – broad PSF in the lateral direction (PSF width ~1/NA) • blurred lateral features – broad PSF in longitudinal direction (PSF depth ...
... – narrow PSF in the lateral direction (PSF width ~1/NA) • sharp lateral features – narrow PSF in longitudinal direction (PSF depth ~1/NA2) • poor depth of field • low NA – broad PSF in the lateral direction (PSF width ~1/NA) • blurred lateral features – broad PSF in longitudinal direction (PSF depth ...
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.