Technical Information on Optics
... solar spectrum. He determined that these lines were caused by the atomic absorption in specific elements found in the chromosphere of the sun. Fraunhofer realized that these lines corresponded to certain wavelengths in the spectrum and could therefore be used to measure the dispersion of optical g ...
... solar spectrum. He determined that these lines were caused by the atomic absorption in specific elements found in the chromosphere of the sun. Fraunhofer realized that these lines corresponded to certain wavelengths in the spectrum and could therefore be used to measure the dispersion of optical g ...
Stellar Activity with SONG
... The light to be dispersed is made to fall on the grating at right angles to the faces of the grooves. This has the effect of producing a series of overlapping spectra with a high degree of resolution. A second, low-dispersion grating, or a prism, arranged perpendicular to the échelle, serves to sepa ...
... The light to be dispersed is made to fall on the grating at right angles to the faces of the grooves. This has the effect of producing a series of overlapping spectra with a high degree of resolution. A second, low-dispersion grating, or a prism, arranged perpendicular to the échelle, serves to sepa ...
lens theory - Laser Components
... TEMoo waists and locations. In particular, "near-Gaussian" pulsed solid state lasers are many times diffraction limited as may be verified by comparing the manufacturers beam diameter and full angle divergence specifications. Single-stage excimer and copper vapor lasers are even more divergent, even ...
... TEMoo waists and locations. In particular, "near-Gaussian" pulsed solid state lasers are many times diffraction limited as may be verified by comparing the manufacturers beam diameter and full angle divergence specifications. Single-stage excimer and copper vapor lasers are even more divergent, even ...
Motion and Optical Flow
... same methods – apparent motion • Result of algorithm is optical flow (vs. ideal motion field) • Most obvious effects: – Aperture problem: can only get motion perpendicular to edges ...
... same methods – apparent motion • Result of algorithm is optical flow (vs. ideal motion field) • Most obvious effects: – Aperture problem: can only get motion perpendicular to edges ...
Laser ranging: a critical review of usual techniques
... The main sources of inaccuracy in laser rangefinders are noise-generated timing jitter, walk, nonlinearity and drift. Typical noise sources include noise generated by the electronics, shot noise caused by the background radiationinduced current and shot noise created by the noise of the signal curre ...
... The main sources of inaccuracy in laser rangefinders are noise-generated timing jitter, walk, nonlinearity and drift. Typical noise sources include noise generated by the electronics, shot noise caused by the background radiationinduced current and shot noise created by the noise of the signal curre ...
A simple demonstration of frustrated total internal reflection
... the angle of incidence is larger than the critical angle, the electric field penetrates into the adjacent medium in the form of an evanescent wave. The penetration depth is in the order of a wavelength, and can be measured by “frustrating” the reflection by adding an optically dense third medium at ...
... the angle of incidence is larger than the critical angle, the electric field penetrates into the adjacent medium in the form of an evanescent wave. The penetration depth is in the order of a wavelength, and can be measured by “frustrating” the reflection by adding an optically dense third medium at ...
Full Article PDF
... refractive index fluctuations of the medium, which are mainly caused by temperature fluctuations. We assume that the pressure variations in the hot jet spread at very high speed such that the pressure is nearly uniform for two neighbouring points in the jet. The validity of this hypothesis can be veri ...
... refractive index fluctuations of the medium, which are mainly caused by temperature fluctuations. We assume that the pressure variations in the hot jet spread at very high speed such that the pressure is nearly uniform for two neighbouring points in the jet. The validity of this hypothesis can be veri ...
Overview of various methods for measuring a lens focal length
... This technique uses the Talbot effect: the image of a coherent wave with 2D periodic amplitude distribution, incident upon a diffraction grating, is regularly repeated. The distance between each self-image is the Talbot length ∆. If the wave interferes with another wave diffracted by a grating with ...
... This technique uses the Talbot effect: the image of a coherent wave with 2D periodic amplitude distribution, incident upon a diffraction grating, is regularly repeated. The distance between each self-image is the Talbot length ∆. If the wave interferes with another wave diffracted by a grating with ...
Demonstration of the Airy disk using photography and simple light
... the uncertainty of the minima to less than one pixel; however, this may have a diminishing return on reducing the error of the slope in Fig. 7. It would appear that the camera’s sensitivity has a large bearing on the observed pattern rather than the wavelength of the incident light. Attention is now ...
... the uncertainty of the minima to less than one pixel; however, this may have a diminishing return on reducing the error of the slope in Fig. 7. It would appear that the camera’s sensitivity has a large bearing on the observed pattern rather than the wavelength of the incident light. Attention is now ...
10.3.2.1.1 Spectral apparatus An optical arrangement or an
... An optical arrangement or an instrument which disperses optical radiation into a spectrum and/or isolates a specific spectral band is termed spectral apparatus or a spectral instrument. If the entrance aperture, which may be a slit, is sharply imaged in both dimensions, i.e., length and width in the ...
... An optical arrangement or an instrument which disperses optical radiation into a spectrum and/or isolates a specific spectral band is termed spectral apparatus or a spectral instrument. If the entrance aperture, which may be a slit, is sharply imaged in both dimensions, i.e., length and width in the ...
Experimental observation of the far field diffraction patterns of
... A large number of spatial effects can be observed when an intense light beam interacts with a nonlinear medium [1-7]. In particular, concentric ring intensity distribution pattern can be induced in the far field of a beam after propagation through a nonlinear material. This effect of spatial phase-m ...
... A large number of spatial effects can be observed when an intense light beam interacts with a nonlinear medium [1-7]. In particular, concentric ring intensity distribution pattern can be induced in the far field of a beam after propagation through a nonlinear material. This effect of spatial phase-m ...
Real-time fiber-based multi-functional spectral- domain optical coherence tomography at 1.3 m μ
... Optical coherence tomography (OCT) is an interferometric technique capable of noninvasive high-resolution cross-sectional imaging by measuring the intensity of light reflected from within tissue [1]. Since the technique is non-contact and provides images similar in scale and geometry to histology, i ...
... Optical coherence tomography (OCT) is an interferometric technique capable of noninvasive high-resolution cross-sectional imaging by measuring the intensity of light reflected from within tissue [1]. Since the technique is non-contact and provides images similar in scale and geometry to histology, i ...
1 Thin Lenses and Thin Lens Combinations
... σ of the measurements. Include as your uncertainty in the focal length √σN , where N is the number of distance pairs you have measured. Repeat the procedure for a second “unknown lens.” 2. Next, take two positive lenses from your kit and put them in contact as closely as possible on the optical rail ...
... σ of the measurements. Include as your uncertainty in the focal length √σN , where N is the number of distance pairs you have measured. Repeat the procedure for a second “unknown lens.” 2. Next, take two positive lenses from your kit and put them in contact as closely as possible on the optical rail ...
Business Unit Fiber Optics Business Unit Fiber Optics Fiberoptic
... In this example, the output NA will be 0.0022 or, since NA = Sin ß, where ß in the half angle in degrees, we get ß = 0.13 degrees. We may convert this to radians to get 2.2mRad divergence. Again, this represents the half angle. You will notice that since the output beam diameter is 100X the fiber di ...
... In this example, the output NA will be 0.0022 or, since NA = Sin ß, where ß in the half angle in degrees, we get ß = 0.13 degrees. We may convert this to radians to get 2.2mRad divergence. Again, this represents the half angle. You will notice that since the output beam diameter is 100X the fiber di ...
Diode Laser Characteristics
... injection currents. As the temperature is increased, the peaks of both the medium gain and the internal cavity gain curves shift to longer wavelengths. However they do not shift at the same rate, and the result is that the laser “mode hops” to different peaks of the cavity gain function. In practice ...
... injection currents. As the temperature is increased, the peaks of both the medium gain and the internal cavity gain curves shift to longer wavelengths. However they do not shift at the same rate, and the result is that the laser “mode hops” to different peaks of the cavity gain function. In practice ...
VII-I
... • The distance of the object do, the image di and the focal length f obey the mirror equation: 1/do + 1/di = 1/f which can be derived from similar triangles. • By convention all these quantities are considered positive if they are in front of the mirror. • The properties described in this equation a ...
... • The distance of the object do, the image di and the focal length f obey the mirror equation: 1/do + 1/di = 1/f which can be derived from similar triangles. • By convention all these quantities are considered positive if they are in front of the mirror. • The properties described in this equation a ...
Writing a superlattice with light forces
... standing light waves. For the λ/ 2 lattice, an interference pattern with four laser beams that were polarized perpendicular to the substrate plane was used. Another way of switching between these two lattice periods is to change the relative phase between the two standing light waves. In the situati ...
... standing light waves. For the λ/ 2 lattice, an interference pattern with four laser beams that were polarized perpendicular to the substrate plane was used. Another way of switching between these two lattice periods is to change the relative phase between the two standing light waves. In the situati ...
Continuous wave Nd:YAG channel waveguide laser produced by
... higher levels with respect to the bulk samples. Benefiting from high intracavity intensity owing to the reduced active volumes, waveguide lasers show many advantages when compared to their bulk counterparts, such as lower threshold and higher laser slope efficiencies [1]. Those features make wavegui ...
... higher levels with respect to the bulk samples. Benefiting from high intracavity intensity owing to the reduced active volumes, waveguide lasers show many advantages when compared to their bulk counterparts, such as lower threshold and higher laser slope efficiencies [1]. Those features make wavegui ...
Introduction to Nonlinear Optics
... An important application of harmonic generation is nonlinear microscopy. . . Microscopy based on second-harmonic generation in the configuration of a confocal microscope and excited by femtosecond laser pulses was introduced by Curley et al. (1992). Also, harmonic-generation microscopy can be used t ...
... An important application of harmonic generation is nonlinear microscopy. . . Microscopy based on second-harmonic generation in the configuration of a confocal microscope and excited by femtosecond laser pulses was introduced by Curley et al. (1992). Also, harmonic-generation microscopy can be used t ...
Sample Pages
... With fiber bundles, the diameter of the space required for the image relay is reduced significantly, leaving more space for other instrument channels. Other advantages of fiber-optic endoscopes include transmitting the image over long distances and observing around corners. An imaging fiber bundle t ...
... With fiber bundles, the diameter of the space required for the image relay is reduced significantly, leaving more space for other instrument channels. Other advantages of fiber-optic endoscopes include transmitting the image over long distances and observing around corners. An imaging fiber bundle t ...
Profilometer - Department of Mechanical Engineering
... • Radius of diamond stylus from 20 nm to 25 μm • Horizontal resolution is controlled by the scan speed and data signal sampling rate. Contd ... ...
... • Radius of diamond stylus from 20 nm to 25 μm • Horizontal resolution is controlled by the scan speed and data signal sampling rate. Contd ... ...
Plasmonic Nanopore for Electrical Profiling of
... geometry on the results was investigated by measuring the intensity distribution in the longitudinal mode, then rotating the plasmonic nanopore probe 90° around the optical axis and profiling the same source again, thus using the transverse mode of the optical nanoantenna. Results obtained for the tw ...
... geometry on the results was investigated by measuring the intensity distribution in the longitudinal mode, then rotating the plasmonic nanopore probe 90° around the optical axis and profiling the same source again, thus using the transverse mode of the optical nanoantenna. Results obtained for the tw ...
PDF
... refractive index by ~3.2 percent. Comsol™ simulations show that this temperature shift applies not only to the resistor area, but flows quickly along the waveguide, thus enabling higher and more efficient phase shifting. 3. Results and discussion Fig. 2a shows the resulting far field beam, captured ...
... refractive index by ~3.2 percent. Comsol™ simulations show that this temperature shift applies not only to the resistor area, but flows quickly along the waveguide, thus enabling higher and more efficient phase shifting. 3. Results and discussion Fig. 2a shows the resulting far field beam, captured ...
Chapter 5: Geometrical Optics
... Image: If a cone of rays emitted from a point source S arrives at a certain point P, then P is called the image of S. Diffraction-limited image: The size of the image for a point source is not zero. The limited size of an optical system causes the blur of the image point due to diffraction: ...
... Image: If a cone of rays emitted from a point source S arrives at a certain point P, then P is called the image of S. Diffraction-limited image: The size of the image for a point source is not zero. The limited size of an optical system causes the blur of the image point due to diffraction: ...
LASER AND ELECTRICAL SAFETY AND LASER CLASSIFICATION
... possible. (No beams allowed flying up into the air where they can strike someone bending over the table.) Never sit down or bend so that your eyes are at beam level. In case you drop something, and need to bend to pick it up, cover your eyes as you pass through the level of the beams. Keep your head ...
... possible. (No beams allowed flying up into the air where they can strike someone bending over the table.) Never sit down or bend so that your eyes are at beam level. In case you drop something, and need to bend to pick it up, cover your eyes as you pass through the level of the beams. Keep your head ...
Confocal microscopy
Confocal microscopy is an optical imaging technique for increasing optical resolution and contrast of a micrograph by means of adding a spatial pinhole placed at the confocal plane of the lens to eliminate out-of-focus light. It enables the reconstruction of three-dimensional structures from the obtained images. This technique has gained popularity in the scientific and industrial communities and typical applications are in life sciences, semiconductor inspection and materials science.