LHDC High-Performance Fine-Steering Mirror Family
... Positioning and Reporting Linearity • Positioning linearity is defined as the difference between commanded and achieved position over the operating ranges of travel and temperature – Dominated by friction, disturbances and position sensor error – Position sensor error is dominated by thermal sensit ...
... Positioning and Reporting Linearity • Positioning linearity is defined as the difference between commanded and achieved position over the operating ranges of travel and temperature – Dominated by friction, disturbances and position sensor error – Position sensor error is dominated by thermal sensit ...
Mirrors
... If the object in front of the mirror is not too large, the rays in the diagram can be considered to be paraxial rays. It can be shown using geometry that the focal length of the mirror, the object distance and the image distance are related by ...
... If the object in front of the mirror is not too large, the rays in the diagram can be considered to be paraxial rays. It can be shown using geometry that the focal length of the mirror, the object distance and the image distance are related by ...
Tip-tilt mirror and sensor configuration
... Quite modest correction over a very wide field of view Page 20 ...
... Quite modest correction over a very wide field of view Page 20 ...
Adaptive Optics for High-Contrast Imaging
... the need to achieve high-contrast imaging and spectroscopic capabilities to enhance the detection and characterization of extra-solar planetary systems…”. This definition is scientifically motivated and directly links XAO to high-contrast imaging and Exoplanet science making it a special case. All o ...
... the need to achieve high-contrast imaging and spectroscopic capabilities to enhance the detection and characterization of extra-solar planetary systems…”. This definition is scientifically motivated and directly links XAO to high-contrast imaging and Exoplanet science making it a special case. All o ...
Design of Custom Achromatic Lenses Used For Optical Image Relay
... The Science Center for the Advanced Research on Lasers and Engineered Targets (SCARLET) laser system of the High Energy Density Physics research group at the Ohio State University is built to study laser-matter interactions at very high intensities. Ultrashort pulses are needed to generate such high ...
... The Science Center for the Advanced Research on Lasers and Engineered Targets (SCARLET) laser system of the High Energy Density Physics research group at the Ohio State University is built to study laser-matter interactions at very high intensities. Ultrashort pulses are needed to generate such high ...
instruction manual - NexStar Resource Site
... away from you to focus on a more distant object than the one you are currently observing. ...
... away from you to focus on a more distant object than the one you are currently observing. ...
Collaborative Research Projects for Amateur Astronomers
... Telescope (currently in Canary Islands) The current STARE telescope, as of July, 1999, is a field-flattened Schmidt working aperture of 4 in, (f/2.9). The telescope is coupled to a Pixelvision 2K x 2K CCD (Charge-Coupled Device) camera to obtain images with a scale of 10.8 arcseconds per pixel over ...
... Telescope (currently in Canary Islands) The current STARE telescope, as of July, 1999, is a field-flattened Schmidt working aperture of 4 in, (f/2.9). The telescope is coupled to a Pixelvision 2K x 2K CCD (Charge-Coupled Device) camera to obtain images with a scale of 10.8 arcseconds per pixel over ...
a history of the mcmath-pierce solar telescope - NSO
... Advisory Panel for Astronomy responded by establishing an ad hoc Panel on Astronomical Facilities. Dr. Robert R. McMath was selected as chairman of the panel. The panel arranged for the NSF to sponsor a conference “on photo-electric methods be held to see whether a new facility for such investigati ...
... Advisory Panel for Astronomy responded by establishing an ad hoc Panel on Astronomical Facilities. Dr. Robert R. McMath was selected as chairman of the panel. The panel arranged for the NSF to sponsor a conference “on photo-electric methods be held to see whether a new facility for such investigati ...
the spitzer space telescope mission
... black paint on the side that faces away from the Sun and is polished aluminum on the sides that face the thermal shields, solar array, and warm spacecraft components. The Spitzer warm launch design and the wide range of infrared wavelengths observed by the focal plane instruments require an open ape ...
... black paint on the side that faces away from the Sun and is polished aluminum on the sides that face the thermal shields, solar array, and warm spacecraft components. The Spitzer warm launch design and the wide range of infrared wavelengths observed by the focal plane instruments require an open ape ...
Four Aces of Refractive Surgery: Aberrations
... reflects fromthe retina. This reflection serves as secondary source that illuminates the pupillary area from behind. When a plane or spherical wavefront is projected into a perfect optical system free of aberrations the returning wave should be aberration free i.e. plane or spherical. However if the ...
... reflects fromthe retina. This reflection serves as secondary source that illuminates the pupillary area from behind. When a plane or spherical wavefront is projected into a perfect optical system free of aberrations the returning wave should be aberration free i.e. plane or spherical. However if the ...
Comparative h- and m-indices for Fifteen Ground- and Space
... This report provides a comparison of fifteen ground‐based and space‐based observatories. As an accepted standard measure, the h‐index was used to provide a comparison of scientific productivity. For further information on how the h‐ index is calculated, refer to the original Hirsch publication (200 ...
... This report provides a comparison of fifteen ground‐based and space‐based observatories. As an accepted standard measure, the h‐index was used to provide a comparison of scientific productivity. For further information on how the h‐ index is calculated, refer to the original Hirsch publication (200 ...
Eye Box Performance Parameters for Non Pupil Forming Head
... curve that fully describes the contrast of the display versus spatial resolution. This measurement is also performed in both the horizontal and vertical orientations of the square wave patterns. In order to use the display as it was designed the full resolution must be maintained inside the eye box. ...
... curve that fully describes the contrast of the display versus spatial resolution. This measurement is also performed in both the horizontal and vertical orientations of the square wave patterns. In order to use the display as it was designed the full resolution must be maintained inside the eye box. ...
5 - nptel
... Fig 2 mounting of grating (this may be replaced by better photograph) and rotate the table without changing the angle between the telescope and collimator till you see a reflected image of the slit at the telescope Fig 3. Note down the angular reading. This will make the angle of incidence on to the ...
... Fig 2 mounting of grating (this may be replaced by better photograph) and rotate the table without changing the angle between the telescope and collimator till you see a reflected image of the slit at the telescope Fig 3. Note down the angular reading. This will make the angle of incidence on to the ...
Preview of “ZEISS Microscopy Online ...opy Basics | Objectives”
... curvature (for a simple achromat) adds a considerable number of lens elements to the objective. The significant increase in lens elements for plan correction also occurs with fluorite and apochromat objectives, frequently resulting in an extremely tight fit of le ...
... curvature (for a simple achromat) adds a considerable number of lens elements to the objective. The significant increase in lens elements for plan correction also occurs with fluorite and apochromat objectives, frequently resulting in an extremely tight fit of le ...
Document
... classroom where we repeat others’ work over and over getting the same results. People will be repeating our work someday!” “The telescope is awesome! I can’t wait to take it out and show my students the night sky. We are no longer just learning science . . . we are DOING science.” ...
... classroom where we repeat others’ work over and over getting the same results. People will be repeating our work someday!” “The telescope is awesome! I can’t wait to take it out and show my students the night sky. We are no longer just learning science . . . we are DOING science.” ...
RPT-O-G0047 Gemini Telescopes f/16 Optical
... Prime focus. The "Prime focus" is defined as the focal location for the primary mirror when it is used alone without a secondary mirror. Principal Focus. The "Principal focus" is defined as the focal location when using both primary and secondary mirrors. Tip-tilt. Tip-tilt is defined as rotation of ...
... Prime focus. The "Prime focus" is defined as the focal location for the primary mirror when it is used alone without a secondary mirror. Principal Focus. The "Principal focus" is defined as the focal location when using both primary and secondary mirrors. Tip-tilt. Tip-tilt is defined as rotation of ...
Smart Focal Planes
... – How to build lower mass, active instruments to meet flexure requirements of wide-field or high resolution cryogenic instruments? • Note that mass/volume constraints for EAGLE & HARMONI result in density <20% of water, compared with > 30% for current instruments ...
... – How to build lower mass, active instruments to meet flexure requirements of wide-field or high resolution cryogenic instruments? • Note that mass/volume constraints for EAGLE & HARMONI result in density <20% of water, compared with > 30% for current instruments ...
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.