Colorimeters
... The essential parts of a colorimeter are: a light source, which is usually an ordinary filament lamp an aperture which can be adjusted a detector which measures the light which has passed through the solution a set of filters in different ...
... The essential parts of a colorimeter are: a light source, which is usually an ordinary filament lamp an aperture which can be adjusted a detector which measures the light which has passed through the solution a set of filters in different ...
document
... • A concave mirror has an optical axis. • The optical axis is an imaginary straight line drawn perpendicular to the surface of the mirror at its center. • Every light ray traveling parallel to the optical axis as it approaches the mirror is reflected through a point on the optical axis called the fo ...
... • A concave mirror has an optical axis. • The optical axis is an imaginary straight line drawn perpendicular to the surface of the mirror at its center. • Every light ray traveling parallel to the optical axis as it approaches the mirror is reflected through a point on the optical axis called the fo ...
Physical Properties of Lead Molybdate Relevant to Acousto
... Fig. 4. This particular sample was of exceptionally good optical quality and looked almost clear under white light illumination. In the region from 0.42 to 3.9 }J. the transmission loss is due almost entirely to surface reflections. The transmission of an extraordinary wave is similar although the s ...
... Fig. 4. This particular sample was of exceptionally good optical quality and looked almost clear under white light illumination. In the region from 0.42 to 3.9 }J. the transmission loss is due almost entirely to surface reflections. The transmission of an extraordinary wave is similar although the s ...
Optical zone diameters for photorefractive corneal surgery.
... Both the untreated cornea and the transition zone are sources of refractive glare, because they produce outof-focus images on the retina. For a given eye, and particularly for a given pupil diameter, there is an optical zone such that an irregularity outside this circular zone is incapable of scatte ...
... Both the untreated cornea and the transition zone are sources of refractive glare, because they produce outof-focus images on the retina. For a given eye, and particularly for a given pupil diameter, there is an optical zone such that an irregularity outside this circular zone is incapable of scatte ...
MICROWAVE MANIPULATION OF COLD ATOMS
... Experimental sequence of the T.O.F. stage from an oscilloscope screen (without the molasses stage). The Repumper beam (signal from P.D.) is turned off at 0.001 s (which is 1 ms before the end of the 10 s MOT stage. At 0.002 s, the Cooler beam (signal from P.D.) and the anti-Helmholtz coils (TTL sign ...
... Experimental sequence of the T.O.F. stage from an oscilloscope screen (without the molasses stage). The Repumper beam (signal from P.D.) is turned off at 0.001 s (which is 1 ms before the end of the 10 s MOT stage. At 0.002 s, the Cooler beam (signal from P.D.) and the anti-Helmholtz coils (TTL sign ...
5 The Basics of Confocal Microscopy
... otherwise appear blurred when viewed under a conventional microscope. This is achieved by excluding most of the light from the specimen that is not from the microscope’s focal plane. The image thus obtained has less haze and better contrast than that of a conventional microscope and represents a thi ...
... otherwise appear blurred when viewed under a conventional microscope. This is achieved by excluding most of the light from the specimen that is not from the microscope’s focal plane. The image thus obtained has less haze and better contrast than that of a conventional microscope and represents a thi ...
Calibration of the amplification coefficient in
... traceable;” whereas what is actually required is an unbroken chain of measurements to a realization of the meter, with known uncertainty for each link in the chain [7]. Added to this historical precedence in using SHS artifacts are reasonable technical considerations, such as the broadband spectrum ...
... traceable;” whereas what is actually required is an unbroken chain of measurements to a realization of the meter, with known uncertainty for each link in the chain [7]. Added to this historical precedence in using SHS artifacts are reasonable technical considerations, such as the broadband spectrum ...
Laser radiation versus “ordinary light”
... What you need to know (with regard to safety) about the lasers used in the Modern Optics Lab: ...
... What you need to know (with regard to safety) about the lasers used in the Modern Optics Lab: ...
Prediction of photothermal phase signatures from arbitrary
... phase microscopy, and is composed of two different light sources: a coherent Helium-Neon (HeNe) laser (100 mW, 632.8 nm) for interferometric imaging, and a diode-pumped solid-state (DPSS) laser, at wavelength of 808 nm, for optical excitation of nanorods. The excitation laser is connected to a wavef ...
... phase microscopy, and is composed of two different light sources: a coherent Helium-Neon (HeNe) laser (100 mW, 632.8 nm) for interferometric imaging, and a diode-pumped solid-state (DPSS) laser, at wavelength of 808 nm, for optical excitation of nanorods. The excitation laser is connected to a wavef ...
Comparison of two-color methods based on wavelength and
... standard to realize the meter. On the other hand, FOFC is coherent polychromatic light. In addition to wavelength, FOFC contains another length unit, the adjacent pulse repetition interval length (APRIL), which is a coherent combination of multiple wavelengths. Distance measurements using APRIL ...
... standard to realize the meter. On the other hand, FOFC is coherent polychromatic light. In addition to wavelength, FOFC contains another length unit, the adjacent pulse repetition interval length (APRIL), which is a coherent combination of multiple wavelengths. Distance measurements using APRIL ...
Post-print of: J. Mater. Chem. , 2010, 20, 6408
... order to enhance the resolution of a potential sensing device making use of this effect, but for porous 1DPCs with a limited number of layers, as it is our case, increase of resolution will always be at the expense of the intensity of the diffraction peak. Conclusions We have demonstrated a syntheti ...
... order to enhance the resolution of a potential sensing device making use of this effect, but for porous 1DPCs with a limited number of layers, as it is our case, increase of resolution will always be at the expense of the intensity of the diffraction peak. Conclusions We have demonstrated a syntheti ...
Aperture interference and the volumetric resolution of light field
... of various aperture mask schemes. This is most easily illustrated with the toy model in Fig. 2 of a 1D aperture and a specimen spanning just one lateral and one axial dimension. As a first analysis, we tested our hypothesis that the interference from an aperture with two pinholes would transmit more ...
... of various aperture mask schemes. This is most easily illustrated with the toy model in Fig. 2 of a 1D aperture and a specimen spanning just one lateral and one axial dimension. As a first analysis, we tested our hypothesis that the interference from an aperture with two pinholes would transmit more ...
31.3. Rear Projection - Contrast and Gain
... displays. In a color CRT only about one-fifth of the electrons pass through the shadow mask and become available for visible light creation. In LCDs the color filter arrays can reduce transmission by 3-5 times. In projection devices light can be managed much more effectively. Dichroic mirrors are of ...
... displays. In a color CRT only about one-fifth of the electrons pass through the shadow mask and become available for visible light creation. In LCDs the color filter arrays can reduce transmission by 3-5 times. In projection devices light can be managed much more effectively. Dichroic mirrors are of ...
EEE440 Modern Communication Systems Optical Fibre
... Consequently, there is no energy lost to heat by having these modes leak into the cladding. Attenuation is not significant. Also, since the input signal is confined to a single ray path, that of the lowest order mode, there is little time dispersion Less time dispersion means higher bandwidth and th ...
... Consequently, there is no energy lost to heat by having these modes leak into the cladding. Attenuation is not significant. Also, since the input signal is confined to a single ray path, that of the lowest order mode, there is little time dispersion Less time dispersion means higher bandwidth and th ...
Photorefractive cyclometalated complexes
... non-uniform illumination [2,3]. PR media are photoconductors, in which light absorption induces the formation of mobile charge carriers that diffuse or drift through macroscopic distances establishing a charge distribution and the related internal electric field, called space-charge field Esc. If th ...
... non-uniform illumination [2,3]. PR media are photoconductors, in which light absorption induces the formation of mobile charge carriers that diffuse or drift through macroscopic distances establishing a charge distribution and the related internal electric field, called space-charge field Esc. If th ...
Question bank Physics Part1 (Updated 9-July-12)
... 38. A Fresnel’s bi-prism arrangement is set with sodium light ( λ=5893Ǻ) & in the field of view of the eyepiece , sixty two fringes are observed. How many fringes shall we get in the same field of a Hg lamp using green filter passing light of wavelength λ = 5461 Ǻ . 39. Fresnel’s biprism fringes ar ...
... 38. A Fresnel’s bi-prism arrangement is set with sodium light ( λ=5893Ǻ) & in the field of view of the eyepiece , sixty two fringes are observed. How many fringes shall we get in the same field of a Hg lamp using green filter passing light of wavelength λ = 5461 Ǻ . 39. Fresnel’s biprism fringes ar ...
EEE440 Modern Communication Systems Optical Fibre
... – LED has an incoherent optical output whereas Laser produces highly coherent, monochromatic and directional output because a cavity exist for wavelength selectivity ...
... – LED has an incoherent optical output whereas Laser produces highly coherent, monochromatic and directional output because a cavity exist for wavelength selectivity ...
Porous Biomimetic Microlens Arrays as Multifunctional Optical
... range of view. Some vertebrate animals, which need to spend their lives in both air and water, have developed amphibious eyes, allowing them to see clearly in both media. One particular example is seen in the “four-eyed fish” Analeps, which uses an ovoid lens with different curvatures on different a ...
... range of view. Some vertebrate animals, which need to spend their lives in both air and water, have developed amphibious eyes, allowing them to see clearly in both media. One particular example is seen in the “four-eyed fish” Analeps, which uses an ovoid lens with different curvatures on different a ...
Subcarrier multiplexing for high-speed optical transmission
... was then launched into an SMF link with accumulated chromatic dispersion of 2640 ps/nm, SMF. The experiment was performed using dispersion compensating fibers (DCF) (DK series, Lucent Technologies, Murray Hill, NJ 07974 USA), which have large negative dispersion values. No dispersion compensation wa ...
... was then launched into an SMF link with accumulated chromatic dispersion of 2640 ps/nm, SMF. The experiment was performed using dispersion compensating fibers (DCF) (DK series, Lucent Technologies, Murray Hill, NJ 07974 USA), which have large negative dispersion values. No dispersion compensation wa ...
Select Safety Light Curtain Terms
... reaches the receiver element. Alignment Aid: Typically a built-in light curtain feature that facilitates alignment of the emitter (transmitter) and receiver during installation. For long-range sensing, or when using deflecting mirrors, an external alignment aid (such as a laser aligning tool) may be ...
... reaches the receiver element. Alignment Aid: Typically a built-in light curtain feature that facilitates alignment of the emitter (transmitter) and receiver during installation. For long-range sensing, or when using deflecting mirrors, an external alignment aid (such as a laser aligning tool) may be ...
tdlitho
... • Replace the mercury vapor lamp an excimer (exciplex) laser source with shorter wavelength emission – ArF – 193 nM – Shorter wavelength than so-called “deep UV” peak of 248nM – F2 Laser – Low output but at 157nM ...
... • Replace the mercury vapor lamp an excimer (exciplex) laser source with shorter wavelength emission – ArF – 193 nM – Shorter wavelength than so-called “deep UV” peak of 248nM – F2 Laser – Low output but at 157nM ...
Blue laser autofluorescence
... changes. The two imaging modalities serve different purposes,” explains Dr Holz. “One imaging technique does not replace the other. The novel possibility with simultaneous recordings of cSLO FAF images and high-resolution OCT coupled with active eye tracking now offer the opportunity to study the co ...
... changes. The two imaging modalities serve different purposes,” explains Dr Holz. “One imaging technique does not replace the other. The novel possibility with simultaneous recordings of cSLO FAF images and high-resolution OCT coupled with active eye tracking now offer the opportunity to study the co ...
Acousto-Optic Effect and Its use in Signal Processing Abstract 1
... interaction), he formulated the problem in terms of a distribution of scattering sources, polarized by the incident light and modulated in space and time by the thermal sound waves. Another result found by Brillouin is that, with the assumption of a simple isotropic change in refractive index throug ...
... interaction), he formulated the problem in terms of a distribution of scattering sources, polarized by the incident light and modulated in space and time by the thermal sound waves. Another result found by Brillouin is that, with the assumption of a simple isotropic change in refractive index throug ...
Free Space Optical communication
... circular polarization keying (DCPK) format was used while Frequency Shift keying was used for the uplink. Both the downlink and uplink achieved a BER < 1.607e-7 each and signal-to-noise ratio (SNR) of 138 and approximately 1000 respectively. ...
... circular polarization keying (DCPK) format was used while Frequency Shift keying was used for the uplink. Both the downlink and uplink achieved a BER < 1.607e-7 each and signal-to-noise ratio (SNR) of 138 and approximately 1000 respectively. ...
Optical coherence tomography
Optical coherence tomography (OCT) is an established medical imaging technique that uses light to capture micrometer-resolution, three-dimensional images from within optical scattering media (e.g., biological tissue). Optical coherence tomography is based on low-coherence interferometry, typically employing near-infrared light. The use of relatively long wavelength light allows it to penetrate into the scattering medium. Confocal microscopy, another optical technique, typically penetrates less deeply into the sample but with higher resolution.Depending on the properties of the light source (superluminescent diodes, ultrashort pulsed lasers, and supercontinuum lasers have been employed), optical coherence tomography has achieved sub- micrometer resolution (with very wide-spectrum sources emitting over a ~100 nm wavelength range).Optical coherence tomography is one of a class of optical tomographic techniques. A relatively recent implementation of optical coherence tomography, frequency-domain optical coherence tomography, provides advantages in signal-to-noise ratio, permitting faster signal acquisition. Commercially available optical coherence tomography systems are employed in diverse applications, including art conservation and diagnostic medicine, notably in ophthalmology and optometry where it can be used to obtain detailed images from within the retina. Recently it has also begun to be used in interventional cardiology to help diagnose coronary artery disease. It has also shown promise in dermatology to improve the diagnostic process.