Optical tweezers using a diode laser
... forces are of the type pgrad E. Ashkin and co-workers2+” have carefully distinguished amongst pressure (due to reflection and absorption), and the gradient forces (due to refraction), and radiometer forces due to thermal gradients. (Optical trapping occurs where the net gradient and radiation press ...
... forces are of the type pgrad E. Ashkin and co-workers2+” have carefully distinguished amongst pressure (due to reflection and absorption), and the gradient forces (due to refraction), and radiometer forces due to thermal gradients. (Optical trapping occurs where the net gradient and radiation press ...
Astrograph Technical
... optical and manufacturing principles. Using the best quality materials available in the industry, ASA engineers have developed a series of products which leave nothing to chance. ASA astrographs offer perfect imaging performance covering a large field of view, fast focal ratios, exquisite optics, ea ...
... optical and manufacturing principles. Using the best quality materials available in the industry, ASA engineers have developed a series of products which leave nothing to chance. ASA astrographs offer perfect imaging performance covering a large field of view, fast focal ratios, exquisite optics, ea ...
AIP Conference Paper including MPIfR 19 Channel
... In February 2001, MAMBO2 was briefly installed for the first time in the receiver cabin of the 30 m MRT. The field diameter in the Nasmyth focus of the 30 m MRT is limited by the size of the Nasmyth mirrors, and the field of MAMBO2 is already close to that limit. Major mechanical changes were neces ...
... In February 2001, MAMBO2 was briefly installed for the first time in the receiver cabin of the 30 m MRT. The field diameter in the Nasmyth focus of the 30 m MRT is limited by the size of the Nasmyth mirrors, and the field of MAMBO2 is already close to that limit. Major mechanical changes were neces ...
Document
... from each midterm and approximately how many questions would be on it? Thanks! There's no time to be doing prelectures and checkpoints when you have your physics exam and a presentation in sign language you have no idea how to do (still) and then a math test at 8 in the morning the next day! Sorry. ...
... from each midterm and approximately how many questions would be on it? Thanks! There's no time to be doing prelectures and checkpoints when you have your physics exam and a presentation in sign language you have no idea how to do (still) and then a math test at 8 in the morning the next day! Sorry. ...
Ray Optics - Sakshi Education
... 1. Light is a form of energy which on striking the eye makes things visible (stimulates the sensation of vision). 2. A substance through which light can more or less pass is called optical medium. 3. A medium through which light can pass very easily is called transparent medium. 4. A medium through ...
... 1. Light is a form of energy which on striking the eye makes things visible (stimulates the sensation of vision). 2. A substance through which light can more or less pass is called optical medium. 3. A medium through which light can pass very easily is called transparent medium. 4. A medium through ...
I. The Spectrometer and the Balmer Series
... Qualitatively observe the sodium spectrum in first order for m=+1, identifying as many lines as possible. To observe fainter lines, it may be necessary to open the slit a little more, but not so much that the scattered light causes the background to become too light. You will also want to use the bl ...
... Qualitatively observe the sodium spectrum in first order for m=+1, identifying as many lines as possible. To observe fainter lines, it may be necessary to open the slit a little more, but not so much that the scattered light causes the background to become too light. You will also want to use the bl ...
Mirrors - Purdue Physics
... § Now let us suppose that we have many horizontal light rays incident on this spherical mirror as shown § Each light ray obeys the law of reflection at each point § You can see that the rays diverge and do not seem to form any kind of image § However, if we extrapolate the reflected rays through the ...
... § Now let us suppose that we have many horizontal light rays incident on this spherical mirror as shown § Each light ray obeys the law of reflection at each point § You can see that the rays diverge and do not seem to form any kind of image § However, if we extrapolate the reflected rays through the ...
EUVE Measurements of Interplanetary Helium
... Optical consequences of turbulence • Temperature fluctuations in small patches of air cause changes in index of refraction (like many little lenses) • Light rays are refracted many times (by small amounts) • When they reach telescope they are no longer parallel • Hence rays can’t be focused to a po ...
... Optical consequences of turbulence • Temperature fluctuations in small patches of air cause changes in index of refraction (like many little lenses) • Light rays are refracted many times (by small amounts) • When they reach telescope they are no longer parallel • Hence rays can’t be focused to a po ...
Optical metrology for two large highly aspheric
... of the resulting telescopes require that these mirros be polished with focal ratios near 1. The surface accuracy of these mirrors must meet the extremely demanding specifications set by the requirement that the telescope not degrade the atmospheric wave front expected from the best nights of seeing ...
... of the resulting telescopes require that these mirros be polished with focal ratios near 1. The surface accuracy of these mirrors must meet the extremely demanding specifications set by the requirement that the telescope not degrade the atmospheric wave front expected from the best nights of seeing ...
PASSIVE INFRARED TELESCOPES - asas
... due to the use of an internal system of mirrors. Detects even extremely slow movement (0.2 m/s) at right angles to the detection axis.. ...
... due to the use of an internal system of mirrors. Detects even extremely slow movement (0.2 m/s) at right angles to the detection axis.. ...
PARALLAX
... Speedometer (not digital) viewed by the driver vs. the passenger An object in the room when viewed from the RHS of the room vs. the LHS A flagpole when viewed from opposite ends of a sidewalk ...
... Speedometer (not digital) viewed by the driver vs. the passenger An object in the room when viewed from the RHS of the room vs. the LHS A flagpole when viewed from opposite ends of a sidewalk ...
Measuring Size in Astronomy
... Speedometer (not digital) viewed by the driver vs. the passenger An object in the room when viewed from the RHS of the room vs. the LHS A flagpole when viewed from opposite ends of a sidewalk ...
... Speedometer (not digital) viewed by the driver vs. the passenger An object in the room when viewed from the RHS of the room vs. the LHS A flagpole when viewed from opposite ends of a sidewalk ...
Wave Interference and Diffraction Part 3: Telescopes and Interferometry Paul Avery
... More sensitive light collectors (CCD arrays) Thus telescopes are several billion times more sensitive ...
... More sensitive light collectors (CCD arrays) Thus telescopes are several billion times more sensitive ...
What Makes a Failure? Designing a New National Telescope, 1975
... of a big technological project must be judged on more than whether or not it is ever actually built. Ever since astronomers began to use telescopes they have wished for bigger instruments. A bigger telescope collects more light, enabling an astronomer to observe fainter, more distant, and older cele ...
... of a big technological project must be judged on more than whether or not it is ever actually built. Ever since astronomers began to use telescopes they have wished for bigger instruments. A bigger telescope collects more light, enabling an astronomer to observe fainter, more distant, and older cele ...
Performance Improvement of a Flexible Telescope Through
... temperature- and wind-induced pointing changes; however, the measurements were often of little success. The inclinometer cannot be used on telescope components that tilt (reflector, backup structure, quadripod); they can be used on telescope components that are fixed in space or that rotate around t ...
... temperature- and wind-induced pointing changes; however, the measurements were often of little success. The inclinometer cannot be used on telescope components that tilt (reflector, backup structure, quadripod); they can be used on telescope components that are fixed in space or that rotate around t ...
Hubble Error: Time, Money and Millionths of an inch
... To make the space telescope’s main mirror, as well as its 12.5-inch secondary minor, PerkinElmer devised a system at its Danbury plant that substantially advanced the science. Lying on a bed of 134 titanium nails to simulate the gravity-free environment of space, the glass would be polished by a spi ...
... To make the space telescope’s main mirror, as well as its 12.5-inch secondary minor, PerkinElmer devised a system at its Danbury plant that substantially advanced the science. Lying on a bed of 134 titanium nails to simulate the gravity-free environment of space, the glass would be polished by a spi ...
Optical telescope
An optical telescope is a telescope that gathers and focuses light, mainly from the visible part of the electromagnetic spectrum, to create a magnified image for direct view, or to make a photograph, or to collect data through electronic image sensors.There are three primary types of optical telescope: refractors, which use lenses (dioptrics) reflectors, which use mirrors (catoptrics) catadioptric telescopes, which combine lenses and mirrorsA telescope's light gathering power and ability to resolve small detail is directly related to the diameter (or aperture) of its objective (the primary lens or mirror that collects and focuses the light). The larger the objective, the more light the telescope collects and the finer detail it resolves.People use telescopes and binoculars for activities such as observational astronomy, ornithology, pilotage and reconnaissance, and watching sports or performance arts.