Optical diffraction tomography for high resolution live cell imaging
... images of the transmitted field must be recorded, since absorption coefficient and refractive index affect both amplitude and phase of the field. Moreover, interference among scatterers complicates the deconvolution process. To fully describe the effect of interference, the wave equation must be sol ...
... images of the transmitted field must be recorded, since absorption coefficient and refractive index affect both amplitude and phase of the field. Moreover, interference among scatterers complicates the deconvolution process. To fully describe the effect of interference, the wave equation must be sol ...
Paper
... signals into electrical signals, as the materials they are made of are able to absorb light. Devices that exhibit a special design to collect light are called phototransistors. Several approaches have been studied for efficient light coupling: vertical illumination through a transparent electrode or ...
... signals into electrical signals, as the materials they are made of are able to absorb light. Devices that exhibit a special design to collect light are called phototransistors. Several approaches have been studied for efficient light coupling: vertical illumination through a transparent electrode or ...
Wavelength-tuning interferometry of intraocular distances
... path length is changed in order to match the light transit times in the reference beam to the light transit time in the object. An alternative approach for measuring optical distances is to use frequency- or Fourier-domain techniques. In these techniques a fixed-reference path length is used. The ob ...
... path length is changed in order to match the light transit times in the reference beam to the light transit time in the object. An alternative approach for measuring optical distances is to use frequency- or Fourier-domain techniques. In these techniques a fixed-reference path length is used. The ob ...
Exposure and Imaging
... – The best lenses used in projection lithography have NA = 0.3 - 0.4 – A lens with NA = 0.50 is a f/1.00 lens: its focal length and effective diameter are the same! – The largest NA lenses ever made were a NA = 0.54 and a NA = 0.60 by Nikon. ...
... – The best lenses used in projection lithography have NA = 0.3 - 0.4 – A lens with NA = 0.50 is a f/1.00 lens: its focal length and effective diameter are the same! – The largest NA lenses ever made were a NA = 0.54 and a NA = 0.60 by Nikon. ...
Quiz 9
... Light rays from the top of the plate are refracted at the water surface. The image is located at qt = -(na/nw)pt = -(1/1.33)×15 = -11.28 cm or 11.28 cm below the water surface. Light rays from the bottom surface of the plate are refracted twice, once at the top of the plate and once at the water sur ...
... Light rays from the top of the plate are refracted at the water surface. The image is located at qt = -(na/nw)pt = -(1/1.33)×15 = -11.28 cm or 11.28 cm below the water surface. Light rays from the bottom surface of the plate are refracted twice, once at the top of the plate and once at the water sur ...
Angle-independent structural colors of silicon
... show a distinctive minimum at a wavelength of 640 nm, corresponding to a normalized frequency of Λ∕λ ¼ 0.47 and a normalized height of h∕Λ ¼ 0.58, which by the simulations displayed in Figs. 2 and 3 are found to indicate a resonance anomaly behavior with strong coupling to a leaky surface wave.6 The ...
... show a distinctive minimum at a wavelength of 640 nm, corresponding to a normalized frequency of Λ∕λ ¼ 0.47 and a normalized height of h∕Λ ¼ 0.58, which by the simulations displayed in Figs. 2 and 3 are found to indicate a resonance anomaly behavior with strong coupling to a leaky surface wave.6 The ...
Instructional Software for Visualizing Optical Phenomena
... Each year at colleges and universities nationwide, some 10,000 students take a course on optics, typically through a department of physics. The method of instruction has changed very little in the past 40 years, and many of the textbook illustrations have remained essentially the same over this time ...
... Each year at colleges and universities nationwide, some 10,000 students take a course on optics, typically through a department of physics. The method of instruction has changed very little in the past 40 years, and many of the textbook illustrations have remained essentially the same over this time ...
Proximity Detection IR LED and Optical Crosstalk
... The TAOS proximity sensors provide a robust and cost-effective means for detecting the amount of light reflected from an object. However, this process is often complicated by introducing glass between the IR LED, which shines invisible light onto the target, and the sensor, which senses the very sma ...
... The TAOS proximity sensors provide a robust and cost-effective means for detecting the amount of light reflected from an object. However, this process is often complicated by introducing glass between the IR LED, which shines invisible light onto the target, and the sensor, which senses the very sma ...
Integration of a semiconductor laser source on silicon
... • Grating couples - to diffract light out of plane so that it can be measured. Up to date, the focus of research has been on designs having a vertical current injection (VCI) scheme, meaning that the contacts are situated above and below the gain material. The novelty of our laser design concept is ...
... • Grating couples - to diffract light out of plane so that it can be measured. Up to date, the focus of research has been on designs having a vertical current injection (VCI) scheme, meaning that the contacts are situated above and below the gain material. The novelty of our laser design concept is ...
Waves & Oscillations Physics 42200 Spring 2014 Semester
... Two slits 0.46 mm apart are 500 cm away from the screen. What would be the distance between the zero’th and first maximum for light with λ=532 nm? ...
... Two slits 0.46 mm apart are 500 cm away from the screen. What would be the distance between the zero’th and first maximum for light with λ=532 nm? ...
Review Article Nanostructures for Enhanced Light Absorption in
... An illustrative example of this enhanced absorption is the observation of photolysis of water-soluble components inside cloud droplets by ultraviolet/visible radiation [28]. A similar concept for achievement of light guiding is realized by placing a plasmonic metal structure on the backside of a thi ...
... An illustrative example of this enhanced absorption is the observation of photolysis of water-soluble components inside cloud droplets by ultraviolet/visible radiation [28]. A similar concept for achievement of light guiding is realized by placing a plasmonic metal structure on the backside of a thi ...
Synopses by Kim Larsen
... which breaks up the expression into a beam profile dependent term, a beam and path dependent term, and the figure of merit for the window defined in Equation 1. The only approximation to completely determine the figure of merit is to assume that the surface absorption effects are significantly smal ...
... which breaks up the expression into a beam profile dependent term, a beam and path dependent term, and the figure of merit for the window defined in Equation 1. The only approximation to completely determine the figure of merit is to assume that the surface absorption effects are significantly smal ...
Automatic Absolute Distance Measurement with One Micrometer
... cannot be addressed by classical techniques such as time of flight, or incremental interferometry [3]. Time of flight techniques are able to measure distances ranging from several meters to several hundreds of meters, or even greater and the expected accuracy for this technique ranges from several t ...
... cannot be addressed by classical techniques such as time of flight, or incremental interferometry [3]. Time of flight techniques are able to measure distances ranging from several meters to several hundreds of meters, or even greater and the expected accuracy for this technique ranges from several t ...
Optimizing Fluorescence Signal Quality
... linearly when counts are below 6000. Above 6000, the PMT will not behave in a linear fashion and will begin to saturate. If the PMT sees additional light after saturation, it will output decreasing counts until it settles on a live count of “1”. The PMT’s lifetime is a function of the total current ...
... linearly when counts are below 6000. Above 6000, the PMT will not behave in a linear fashion and will begin to saturate. If the PMT sees additional light after saturation, it will output decreasing counts until it settles on a live count of “1”. The PMT’s lifetime is a function of the total current ...
The influence of coherent waves on the remotely sensed reflectance
... effects of intensified backscattering are limited to angles less than approximately 12º between the detector and the source. The maximum intensification is 6.5% in the blue and green and 12% in the red for a windspeed of 7.5 m/s. This enhanced backscattering effect is thus extremely important for ac ...
... effects of intensified backscattering are limited to angles less than approximately 12º between the detector and the source. The maximum intensification is 6.5% in the blue and green and 12% in the red for a windspeed of 7.5 m/s. This enhanced backscattering effect is thus extremely important for ac ...
Numerical modelling of LCD electro
... alignment layers and the conductive layer. An electrooptical effect, visible for the human eye can only be achieved if either dichroic dyes are added to the LC-material or alternatively when sheet polarisers are attached to the LC-cell in order to obtain changes in light intensity (the human eye is ...
... alignment layers and the conductive layer. An electrooptical effect, visible for the human eye can only be achieved if either dichroic dyes are added to the LC-material or alternatively when sheet polarisers are attached to the LC-cell in order to obtain changes in light intensity (the human eye is ...
Practical Aspects of Mirror Usage in Optical Systems for
... purchase a mirror, and is confronted by a large number of offerings. Each part description indicates it is to be used for a specific purpose, wavelength range, etc. The newcomer first wonders, “Why are there so many varieties of mirrors?” and shortly afterwards, “How do I know which mirror to use fo ...
... purchase a mirror, and is confronted by a large number of offerings. Each part description indicates it is to be used for a specific purpose, wavelength range, etc. The newcomer first wonders, “Why are there so many varieties of mirrors?” and shortly afterwards, “How do I know which mirror to use fo ...
optical cavity
... 7. Optical cavity( optical resonator) An optical cavity or optical resonator is an arrangement of mirrors that forms a standing wave cavity resonator for light waves. Optical cavities are a major component of lasers, surrounding the gain medium and providing feedback of the laser light 7.1 Resonator ...
... 7. Optical cavity( optical resonator) An optical cavity or optical resonator is an arrangement of mirrors that forms a standing wave cavity resonator for light waves. Optical cavities are a major component of lasers, surrounding the gain medium and providing feedback of the laser light 7.1 Resonator ...
Practical Aspects of Mirror Usage in Optical Systems for
... purchase a mirror, and is confronted by a large number of offerings. Each part description indicates it is to be used for a specific purpose, wavelength range, etc. The newcomer first wonders, “Why are there so many varieties of mirrors?” and shortly afterwards, “How do I know which mirror to use fo ...
... purchase a mirror, and is confronted by a large number of offerings. Each part description indicates it is to be used for a specific purpose, wavelength range, etc. The newcomer first wonders, “Why are there so many varieties of mirrors?” and shortly afterwards, “How do I know which mirror to use fo ...
Planoconcave lens by negative refraction of stacked subwavelength
... Since the first experimental confirmation by Smith’s group [3] of a NRI medium at microwaves using arrays of metallic wires to get negative dielectric permittivity [4], mixed with arrays of split rings resonators (SRRs) to obtain negative magnetic permeability [5], several attempts have been done to ...
... Since the first experimental confirmation by Smith’s group [3] of a NRI medium at microwaves using arrays of metallic wires to get negative dielectric permittivity [4], mixed with arrays of split rings resonators (SRRs) to obtain negative magnetic permeability [5], several attempts have been done to ...
Introduction` Materials`
... speed of light in air. (The speed of light in a vacuum and in air is 299 792 458 m/s). ...
... speed of light in air. (The speed of light in a vacuum and in air is 299 792 458 m/s). ...
Anti-reflective coating
An antireflective or anti-reflection (AR) coating is a type of optical coating applied to the surface of lenses and other optical elements to reduce reflection. In typical imaging systems, this improves the efficiency since less light is lost. In complex systems such as a telescope, the reduction in reflections also improves the contrast of the image by elimination of stray light. This is especially important in planetary astronomy. In other applications, the primary benefit is the elimination of the reflection itself, such as a coating on eyeglass lenses that makes the eyes of the wearer more visible to others, or a coating to reduce the glint from a covert viewer's binoculars or telescopic sight.Many coatings consist of transparent thin film structures with alternating layers of contrasting refractive index. Layer thicknesses are chosen to produce destructive interference in the beams reflected from the interfaces, and constructive interference in the corresponding transmitted beams. This makes the structure's performance change with wavelength and incident angle, so that color effects often appear at oblique angles. A wavelength range must be specified when designing or ordering such coatings, but good performance can often be achieved for a relatively wide range of frequencies: usually a choice of IR, visible, or UV is offered.