Optical Instruments - Dr. Dr. Bill`s Page
... The retinoscope permits an "objective" estimate of a patient's refraction in which no subjective responses are required of the patient. The doctor shines the retinoscope's light into the patient's eye and then wiggles the light beam while watching the red reflex from the patient's retina in the pat ...
... The retinoscope permits an "objective" estimate of a patient's refraction in which no subjective responses are required of the patient. The doctor shines the retinoscope's light into the patient's eye and then wiggles the light beam while watching the red reflex from the patient's retina in the pat ...
Parhelic-like Circle and Chaotic Light Scattering
... a complex behavior, for example, though the laws of ray reflection and refraction are simple, the boundary conditions for the light scattering are very difficult to be determined precisely due to many awkward technical aspects, such as nonlinearities, or if the thickness of the liquid films is suffi ...
... a complex behavior, for example, though the laws of ray reflection and refraction are simple, the boundary conditions for the light scattering are very difficult to be determined precisely due to many awkward technical aspects, such as nonlinearities, or if the thickness of the liquid films is suffi ...
Seminar2
... are no longer confined between mirrors. • Radii of curvatures of the resonator mirrors and its length determine the type of the resonator. • Energy extraction is greater with use of the unstable cavities. • With an unstable cavity output coupled with a supergaussian mirror we can obtain “top–hat” pr ...
... are no longer confined between mirrors. • Radii of curvatures of the resonator mirrors and its length determine the type of the resonator. • Energy extraction is greater with use of the unstable cavities. • With an unstable cavity output coupled with a supergaussian mirror we can obtain “top–hat” pr ...
ph104exp09_Physical_Optics_03
... Holding the double razor blade between your middle finger and thumb, with your fore finger pressing down on top (the dull part), draw a line on the photographic plate parallel to one edge and about 0.5 cm in from one edge. Look at it with a magnifier to see if there is a clean double line scratched ...
... Holding the double razor blade between your middle finger and thumb, with your fore finger pressing down on top (the dull part), draw a line on the photographic plate parallel to one edge and about 0.5 cm in from one edge. Look at it with a magnifier to see if there is a clean double line scratched ...
Flow Cytometry and Sorting, Part 1
... When a filter is placed at a 45o angle to a light source, light which would have been transmitted by that filter is still transmitted but light that would have been blocked is reflected (at a 90o angle) Used this way, a filter is called a dichroic filter or dichroic mirror ...
... When a filter is placed at a 45o angle to a light source, light which would have been transmitted by that filter is still transmitted but light that would have been blocked is reflected (at a 90o angle) Used this way, a filter is called a dichroic filter or dichroic mirror ...
CHAPTER 15. LASER AND FIBER OPTICS The laser is essentially
... laser medium. Pumps can be optical, electrical, chemical, or thermal in nature, so long as they provide energy that can be coupled into the laser medium to excite the atoms and create the required population inversion. Many lasers are named after the type of laser medium used, for example, heliumneo ...
... laser medium. Pumps can be optical, electrical, chemical, or thermal in nature, so long as they provide energy that can be coupled into the laser medium to excite the atoms and create the required population inversion. Many lasers are named after the type of laser medium used, for example, heliumneo ...
Chapter 7 Optical lattices and experiment design
... the potential wells will move in time (with velocity v = δ/k, where k is the wavevector of the laser). In practise this could be implemented with an acoustooptical modulator (AOM). A second method is to vary the phase of one of the beams, which could be implemented using technology based upon a liqu ...
... the potential wells will move in time (with velocity v = δ/k, where k is the wavevector of the laser). In practise this could be implemented with an acoustooptical modulator (AOM). A second method is to vary the phase of one of the beams, which could be implemented using technology based upon a liqu ...
Document
... redirect another beam of light. The researchers have shown that the pressure of light can be used in both attractive and repulsive modes to open and close nanoswitches. TechNews 11/09 reported on the use of doping techniques in plastic optical fibre to control light. Normally, the chemical dopants s ...
... redirect another beam of light. The researchers have shown that the pressure of light can be used in both attractive and repulsive modes to open and close nanoswitches. TechNews 11/09 reported on the use of doping techniques in plastic optical fibre to control light. Normally, the chemical dopants s ...
Joule Expansion Imaging Techniques on Microlectronic Devices
... From Fig. 3, we can also deduce that the measured resistor mean width, estimated by the full width half maximum, is 1.8±0.2 µm instead of the expected 350 nm. Several phenomena can explain it. First, when a device is functioning, the spatial limitation comes from the thermal one because even at 1 MH ...
... From Fig. 3, we can also deduce that the measured resistor mean width, estimated by the full width half maximum, is 1.8±0.2 µm instead of the expected 350 nm. Several phenomena can explain it. First, when a device is functioning, the spatial limitation comes from the thermal one because even at 1 MH ...
BMS 631 - Lecture 4
... surrounded by what is called the Airy disk (alternating light and dark rings) • at wavelength l, the radius of the Airy disk is 0.61 l Thus to resolve two points they need to be at least this distance apart (radius of the Airy disk) thus the resolution is defined as 0.61 l /NA ...
... surrounded by what is called the Airy disk (alternating light and dark rings) • at wavelength l, the radius of the Airy disk is 0.61 l Thus to resolve two points they need to be at least this distance apart (radius of the Airy disk) thus the resolution is defined as 0.61 l /NA ...
Visualization of cell structure in situ by atomic force microscopy
... analyzing living cells at the nanoscale spatial resolution. Many attempts have been devoted to the analysis of biological samples and particularly the study of isolated molecules such as nucleic acids such as DNA or proteins [4-11]. In addition, the analysis of cell structure has focused on either l ...
... analyzing living cells at the nanoscale spatial resolution. Many attempts have been devoted to the analysis of biological samples and particularly the study of isolated molecules such as nucleic acids such as DNA or proteins [4-11]. In addition, the analysis of cell structure has focused on either l ...
View PDF
... Detectors An op-amp is a differential amplifier: We can use this same idea in optics to achieve a high rejection ratio of common mode noise – eliminate noise that is common to both input channels of the amplifier. Good technique for low-level signals appearing on top of a large, steady background. T ...
... Detectors An op-amp is a differential amplifier: We can use this same idea in optics to achieve a high rejection ratio of common mode noise – eliminate noise that is common to both input channels of the amplifier. Good technique for low-level signals appearing on top of a large, steady background. T ...
Conference title, upper and lower case, bolded, 18 point type
... Tug-of-War Optical Tweezers to Control Cell Clusters Optical tweezers are excellent tools for trapping and manipulating bacteria and cells. Dr. Z Chen’s lab at COSE has designed what they called “tug-of-war” optical tweezers for assessment of cell-cell adhesion - a key factor in biofilm formation. W ...
... Tug-of-War Optical Tweezers to Control Cell Clusters Optical tweezers are excellent tools for trapping and manipulating bacteria and cells. Dr. Z Chen’s lab at COSE has designed what they called “tug-of-war” optical tweezers for assessment of cell-cell adhesion - a key factor in biofilm formation. W ...
Microscopy - PSSurvival.com
... Growth of protein crystals results in both protein and salt crystals. Both are colorless and microscopic. Recovery of the protein crystals requires imaging which can be done by the intrinsic fluorescence of the protein or by using transmission microscopy. Both methods require an ultraviolet microsco ...
... Growth of protein crystals results in both protein and salt crystals. Both are colorless and microscopic. Recovery of the protein crystals requires imaging which can be done by the intrinsic fluorescence of the protein or by using transmission microscopy. Both methods require an ultraviolet microsco ...
Phys. Rev. Lett. 101, 076101 - APS Link Manager
... study of nanostructures extending from organic systems to inorganic nanostructures and nanophases and may facilitate unique and accurate reconstruction of individual specimens by use of x-ray free electron lasers [5,6]. Our method builds on the concept of coherent x-ray scattering or lensless imagin ...
... study of nanostructures extending from organic systems to inorganic nanostructures and nanophases and may facilitate unique and accurate reconstruction of individual specimens by use of x-ray free electron lasers [5,6]. Our method builds on the concept of coherent x-ray scattering or lensless imagin ...
Problem Set 1 (due 2/21/06)
... modes of water are relatively small, and aqueous samples may be analyzed (water absorbs strongly in the IR). This allows analysis of a wide range of chemical and biological samples (even in vivo). Raman measures vibrational mode energies, but uses a visible wavelength light source. Optics and detect ...
... modes of water are relatively small, and aqueous samples may be analyzed (water absorbs strongly in the IR). This allows analysis of a wide range of chemical and biological samples (even in vivo). Raman measures vibrational mode energies, but uses a visible wavelength light source. Optics and detect ...
EXTERNAL MODULATION
... However, for the moment lithium niobate (an inorganic material) dominates, not because it excels with respect to loss, stability, maximum optical power or electro-optic sensitivity, but because it offers the best compromise between all four key parameters. Lithium niobate is also relatively cheap si ...
... However, for the moment lithium niobate (an inorganic material) dominates, not because it excels with respect to loss, stability, maximum optical power or electro-optic sensitivity, but because it offers the best compromise between all four key parameters. Lithium niobate is also relatively cheap si ...
Surface Texture Effect on Luster of Anodized Aluminum
... The Chromatic Confocal technique uses a white light source, where light passes through an objective lens with a high degree of chromatic aberration. The refractive index of the objective lens will vary in relation to the wavelength of the light. In effect, each separate wavelength of the incident wh ...
... The Chromatic Confocal technique uses a white light source, where light passes through an objective lens with a high degree of chromatic aberration. The refractive index of the objective lens will vary in relation to the wavelength of the light. In effect, each separate wavelength of the incident wh ...
Supplementary Information
... 4. The system The system we built to realize the hypothesis uses a Nikon Eclipse® i80 multi-functional optical microscope, Japan, with a 100X, NA = 0.8 objective lens (Figure S4). The microfiber is a flame-heated taper drawing of a commercial single-mode fiber (Newport F-SV-C, USA), whose operation ...
... 4. The system The system we built to realize the hypothesis uses a Nikon Eclipse® i80 multi-functional optical microscope, Japan, with a 100X, NA = 0.8 objective lens (Figure S4). The microfiber is a flame-heated taper drawing of a commercial single-mode fiber (Newport F-SV-C, USA), whose operation ...
Activity - UMassK12
... Reverse Osmosis Filtration: A process called reverse osmosis can be used to filter harmful ions from a water supply. Question 11: The diameter of an ion is approximately 6.7 x 10-8 cm. What is its diameter in meters and nanometers? Record that depth in the last row of the data table. Question 12: Wh ...
... Reverse Osmosis Filtration: A process called reverse osmosis can be used to filter harmful ions from a water supply. Question 11: The diameter of an ion is approximately 6.7 x 10-8 cm. What is its diameter in meters and nanometers? Record that depth in the last row of the data table. Question 12: Wh ...
A Laser Coupler for DVD/CD Playback
... The DVD system is now being widely used in playback optical disc systems, such as DVDvideo players and DVD-ROM drives. In the DVD system, it is important that the optical pickup of the system can play back both DVD media and CD media such as CD-DA, CD-ROM and CD-R/RW. But the 650nm laser cannot be u ...
... The DVD system is now being widely used in playback optical disc systems, such as DVDvideo players and DVD-ROM drives. In the DVD system, it is important that the optical pickup of the system can play back both DVD media and CD media such as CD-DA, CD-ROM and CD-R/RW. But the 650nm laser cannot be u ...
Super-Resolution Microscopy: Interference and Pattern Techniques
... In fluorescence microscopy, the wavelength of the emission light is close to that of the excitation light (λem ≈ λex ). Hence, the reciprocal grating period of the smallest possible illumination pattern approximates the cut-off frequency kcut-off . The delta functions of the Fourier-transformed illum ...
... In fluorescence microscopy, the wavelength of the emission light is close to that of the excitation light (λem ≈ λex ). Hence, the reciprocal grating period of the smallest possible illumination pattern approximates the cut-off frequency kcut-off . The delta functions of the Fourier-transformed illum ...
Midterm2
... of incident light is again =500 nm, how many transmission maxima are observed during this change? (5 marks) ...
... of incident light is again =500 nm, how many transmission maxima are observed during this change? (5 marks) ...
by30 microscope worksheet
... Organisms, cells, and structures of varying sizes have been provided for your observation. Draw each using a magnification that makes sense (i.e. close enough that you can see one representative cell clearly but not so close that the single cell doesn’t all fit in the field). Indicate the total mag ...
... Organisms, cells, and structures of varying sizes have been provided for your observation. Draw each using a magnification that makes sense (i.e. close enough that you can see one representative cell clearly but not so close that the single cell doesn’t all fit in the field). Indicate the total mag ...
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.