White-light Fourier transformer with low chromatic aberration
... but temporally incoherent illumination-are becoming more frequently used. Partially coherent systems are characterized by their multichannel nature. Thus they are suitable for processing information in a parallel way, and consequently for improving the signal-to-noise ratio.1 2 The treatment of a sy ...
... but temporally incoherent illumination-are becoming more frequently used. Partially coherent systems are characterized by their multichannel nature. Thus they are suitable for processing information in a parallel way, and consequently for improving the signal-to-noise ratio.1 2 The treatment of a sy ...
Simulation of Optical Microfiber Loop Resonators for Ambient Refractive Index Sensing
... MLRs are more convenient for fabrication, manipulation and application. An MLR can be directly obtained using a microfiber manipulated into a loop, where effective coupling occurs between the contact sections of the microfiber. The MLR with loaded Q-factor of 120000 has been produced [16], and the p ...
... MLRs are more convenient for fabrication, manipulation and application. An MLR can be directly obtained using a microfiber manipulated into a loop, where effective coupling occurs between the contact sections of the microfiber. The MLR with loaded Q-factor of 120000 has been produced [16], and the p ...
Vision and Optical Instruments
... The eye is perhaps the most interesting of all optical instruments. The eye is remarkable in how it forms images and in the richness of detail and color it can detect. However, our eyes commonly need some correction, to reach what is called “normal” vision, but should be called ideal rather than nor ...
... The eye is perhaps the most interesting of all optical instruments. The eye is remarkable in how it forms images and in the richness of detail and color it can detect. However, our eyes commonly need some correction, to reach what is called “normal” vision, but should be called ideal rather than nor ...
Experimental study of transmission enhancement of evanescent waves through silver
... of transmission enhancement of evanescent waves has not been reported yet to our knowledge. Most researchers directly take the computed transmission enhancement factor as an input to estimate other physical effects, or indirectly extract the information for the dip in attenuated total reflection. As ...
... of transmission enhancement of evanescent waves has not been reported yet to our knowledge. Most researchers directly take the computed transmission enhancement factor as an input to estimate other physical effects, or indirectly extract the information for the dip in attenuated total reflection. As ...
Microscopy Tutorial - Fred Hutch Shared Resources
... The bending of light waves by sharp edges or small objects. This is a very different mechanism from refraction. The shadow of a sharp edge is not a sharp boundary, but a series of sinusoidal ripples. Similarly, a beam of light passing through a small pinhole is not projected as a discrete point, but ...
... The bending of light waves by sharp edges or small objects. This is a very different mechanism from refraction. The shadow of a sharp edge is not a sharp boundary, but a series of sinusoidal ripples. Similarly, a beam of light passing through a small pinhole is not projected as a discrete point, but ...
A simple method for Bragg diffraction in volume holographic gratings Heifetz,
... d, and refractive index n0. For simplicity, we assume that the slab is immersed in a medium with a matched refractive index n0. A holographic grating is written by optically inducing refractive index variations in the bulk of the slab. Figure 1 shows the model of a volume grating that is used for ou ...
... d, and refractive index n0. For simplicity, we assume that the slab is immersed in a medium with a matched refractive index n0. A holographic grating is written by optically inducing refractive index variations in the bulk of the slab. Figure 1 shows the model of a volume grating that is used for ou ...
Conjugated gammadion chiral metamaterial with uniaxial optical
... uniaxially exhibits huge optical activity, circular dichroism, and negative refractive index. This new design more clearly lacks any mirror symmetry plane compared to previous work.13 In Ref. 13, the structure itself has a mirror symmetry plane. The lack of mirror symmetry only originates from the p ...
... uniaxially exhibits huge optical activity, circular dichroism, and negative refractive index. This new design more clearly lacks any mirror symmetry plane compared to previous work.13 In Ref. 13, the structure itself has a mirror symmetry plane. The lack of mirror symmetry only originates from the p ...
485-146 - Wseas.us
... We have developed a novel integrated optical device based on new original technique of the electrooptical control of the spectral transfer function of Bragg gratings in LiNbO3 single-mode channel waveguides. The device could provide new functional capacity of the optical components for wavelength co ...
... We have developed a novel integrated optical device based on new original technique of the electrooptical control of the spectral transfer function of Bragg gratings in LiNbO3 single-mode channel waveguides. The device could provide new functional capacity of the optical components for wavelength co ...
Flat optics with designer metasurfaces
... Secondary waves created by diffractive optical components such as holograms propagate in air and interfere in the far-field to form complex patterns. The propagation effect is also used in transformation optics1,2, which utilizes optical materials structured on a subwavelength scale (metamaterials3, ...
... Secondary waves created by diffractive optical components such as holograms propagate in air and interfere in the far-field to form complex patterns. The propagation effect is also used in transformation optics1,2, which utilizes optical materials structured on a subwavelength scale (metamaterials3, ...
Ch30
... When the object is beyond one focal length, a converging lens produces a real, inverted image. • If the object is close to (but slightly beyond) the focal point, the image is far away. • If the object is far from the focal point, the image is nearer. • In all cases where a real image is formed, the ...
... When the object is beyond one focal length, a converging lens produces a real, inverted image. • If the object is close to (but slightly beyond) the focal point, the image is far away. • If the object is far from the focal point, the image is nearer. • In all cases where a real image is formed, the ...
Desert Island themed project - science
... a) Electronic systems can be used to produce ultrasound waves, which have a frequency higher than the upper limit of hearing for humans. b) Ultrasound waves are partially reflected when they meet a boundary between two different media. The time taken for the reflections to reach a detector can be us ...
... a) Electronic systems can be used to produce ultrasound waves, which have a frequency higher than the upper limit of hearing for humans. b) Ultrasound waves are partially reflected when they meet a boundary between two different media. The time taken for the reflections to reach a detector can be us ...
Sample pages 1 PDF
... The objective lens consists of two or more lens elements in an achromatic or apochromatic configuration. The achromatic doublet is the commonest lens in “standard” binoculars, but high-quality binoculars, particularly large astronomical binoculars, may have an apochromatic triplet. There may also be ...
... The objective lens consists of two or more lens elements in an achromatic or apochromatic configuration. The achromatic doublet is the commonest lens in “standard” binoculars, but high-quality binoculars, particularly large astronomical binoculars, may have an apochromatic triplet. There may also be ...
Total internal reflection holography for optical interconnections
... laser diodes, but most of them work at wavelengths longer than 700 nm. Common recording materials are not sensitive to these wavelengths, but only to visible or UV light. The resulting wavelength shift between the recording and reconstruction leads to aberrations. Because the described HOEs are volu ...
... laser diodes, but most of them work at wavelengths longer than 700 nm. Common recording materials are not sensitive to these wavelengths, but only to visible or UV light. The resulting wavelength shift between the recording and reconstruction leads to aberrations. Because the described HOEs are volu ...
TEP 2.6.11-00 Fourier optics – 2f Arrangement TEP 2.6.11
... Place nothing, a slit and a gridError! Reference source not found. into the plate holder P1. as three different diffraction objects in the object plane. Observe their patterns in the Fourier plane and compare them to the theoretical predictions. (a) Plane wave As a first partial experiment observe t ...
... Place nothing, a slit and a gridError! Reference source not found. into the plate holder P1. as three different diffraction objects in the object plane. Observe their patterns in the Fourier plane and compare them to the theoretical predictions. (a) Plane wave As a first partial experiment observe t ...
Path-reversed substrate-guided- wave optical interconnects for
... DuPont photopolymers ~DuPont Holographic Materials, Wilmington, Delaware! are promising as holographic films because of their dry-processing capacity, long shelf life, good photospeed, and high index modulation.26 –29 The holographic photopolymer is usually coated in the solvent state onto a clear s ...
... DuPont photopolymers ~DuPont Holographic Materials, Wilmington, Delaware! are promising as holographic films because of their dry-processing capacity, long shelf life, good photospeed, and high index modulation.26 –29 The holographic photopolymer is usually coated in the solvent state onto a clear s ...
24 Geometrical Optics
... nearsightedness —– A visual defect in which distant objects appear blurred because their images are focused in front of the retina rather than on it objective eyepiece —– The lens or lens group closest to the eye in an optical instrument. mirror formula —– 1/so + 1/si = −2/R. ...
... nearsightedness —– A visual defect in which distant objects appear blurred because their images are focused in front of the retina rather than on it objective eyepiece —– The lens or lens group closest to the eye in an optical instrument. mirror formula —– 1/so + 1/si = −2/R. ...
ap physics b
... When light encounters a boundary (a change in optical medium) some of the light reflects back obeying the law of reflection and some of the light is transmitted into the new medium. The transmitted light does not travel in the same direction as the original light. Instead it is bent (refracted) at t ...
... When light encounters a boundary (a change in optical medium) some of the light reflects back obeying the law of reflection and some of the light is transmitted into the new medium. The transmitted light does not travel in the same direction as the original light. Instead it is bent (refracted) at t ...
An adaptive liquid lens with radial interdigitated
... where ε0 is the permittivity of free space, ε1 and ε2 are dielectric constants of the droplet and the surrounded medium, respectively. E denotes the electric field. If ε1 > ε2, then these molecules are pulled to move towards the region with higher electric field. Due to the cohesive force between the ...
... where ε0 is the permittivity of free space, ε1 and ε2 are dielectric constants of the droplet and the surrounded medium, respectively. E denotes the electric field. If ε1 > ε2, then these molecules are pulled to move towards the region with higher electric field. Due to the cohesive force between the ...
PDF
... The optical lithography techniques have the advantage of being fast because they can expose the entire pattern in parallel. However, these techniques are beginning to reach the limits imposed upon them by the laws of optics, namely, the diffraction limit 关3兴. The current state of the art in optical ...
... The optical lithography techniques have the advantage of being fast because they can expose the entire pattern in parallel. However, these techniques are beginning to reach the limits imposed upon them by the laws of optics, namely, the diffraction limit 关3兴. The current state of the art in optical ...
DIOPTRICS OF THE FACET LENSES OF MALE BLOWFLIES
... focal distance by measuring the radius of curvature o f front and back surfaces, together with the refractive index. A fundamental study was performed subsequently by Seitz (1968) who showed by interference microscopy that the facet lenses consist of layers of varying thickness and different refract ...
... focal distance by measuring the radius of curvature o f front and back surfaces, together with the refractive index. A fundamental study was performed subsequently by Seitz (1968) who showed by interference microscopy that the facet lenses consist of layers of varying thickness and different refract ...
Grain contrast_published - Chalmers University of Technology
... 3.1. Channeling contrast The depth of penetration of the incoming electrons is affected by the regular arrangement of atoms in crystalline materials. If the incoming electrons encounter a low density of atoms, there is a lower probability that these will return to the surface as BSEs. The channeling ...
... 3.1. Channeling contrast The depth of penetration of the incoming electrons is affected by the regular arrangement of atoms in crystalline materials. If the incoming electrons encounter a low density of atoms, there is a lower probability that these will return to the surface as BSEs. The channeling ...
Résumé
... the imaging system and therefore the resolution. Several ways to overcome these problems have been proposed; two main methods aiming at keeping a good optical resolution are actively developed. The first one uses pre-compensation of the wavefront before propagation, to improve the resolution. This t ...
... the imaging system and therefore the resolution. Several ways to overcome these problems have been proposed; two main methods aiming at keeping a good optical resolution are actively developed. The first one uses pre-compensation of the wavefront before propagation, to improve the resolution. This t ...
Module P6.4 Optical instruments
... thick not thin, and the paraxial approximation breaks down if the aperture of the system is large. Objects cannot always be taken as lying on the optical axis and real lenses have dispersion, as the refractive index (and therefore the focal length) varies with wavelength. All these problems mean tha ...
... thick not thin, and the paraxial approximation breaks down if the aperture of the system is large. Objects cannot always be taken as lying on the optical axis and real lenses have dispersion, as the refractive index (and therefore the focal length) varies with wavelength. All these problems mean tha ...
MM: 70 TIME : 3h
... Two lenses of power +15 D and – 5 D are in contact with each other forming a combinations lens. i. What is the focal length of this combinations ? ii. An object of size 3 cm is placed at 30 cm from this combination of lenses. Calculate the positions and size of the image formed. ...
... Two lenses of power +15 D and – 5 D are in contact with each other forming a combinations lens. i. What is the focal length of this combinations ? ii. An object of size 3 cm is placed at 30 cm from this combination of lenses. Calculate the positions and size of the image formed. ...
Section 13.3 Telescopes and Microscopes
... either on film or in front of your eyes. Most telescopes used by professional astronomers are photographic—essentially gigantic telephoto lenses that form real images of stars on pieces of film or electronic light sensors. However visual telescopes are still popular among amateur astronomers and for ...
... either on film or in front of your eyes. Most telescopes used by professional astronomers are photographic—essentially gigantic telephoto lenses that form real images of stars on pieces of film or electronic light sensors. However visual telescopes are still popular among amateur astronomers and for ...
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.