669 - Caltech Optical Observatories
... can be very fast (very likely < 2 sec), and the steering mirror could be used for fine guidance/centering on a slit, a spaxel, a coronagraphic spot or any location on a detector. This steering mechanism could be used to compensate for differential atmospheric refraction, differential tracking, or an ...
... can be very fast (very likely < 2 sec), and the steering mirror could be used for fine guidance/centering on a slit, a spaxel, a coronagraphic spot or any location on a detector. This steering mechanism could be used to compensate for differential atmospheric refraction, differential tracking, or an ...
MICROSCOPES SLIDE SHOW NOTES
... • Of the five senses, the most important is ____________________. – Aids in the process of gathering information about the environment that we are part of. – The amount of detail that it can provide is severely limited. • In order to overcome those limitations, humans started to develop instruments ...
... • Of the five senses, the most important is ____________________. – Aids in the process of gathering information about the environment that we are part of. – The amount of detail that it can provide is severely limited. • In order to overcome those limitations, humans started to develop instruments ...
GAVRT/SETI Activity Which Waterfall Plot? (Lesson Two) Review the
... this example it takes 10 minutes to go from left to right. Then it goes up and then tracks back for 10 minutes. And it makes a racetrack pattern on the sky. Notice that the separation is such that if there is a signal then the telescope will cross it at least twice (In this case 3 times). The waterf ...
... this example it takes 10 minutes to go from left to right. Then it goes up and then tracks back for 10 minutes. And it makes a racetrack pattern on the sky. Notice that the separation is such that if there is a signal then the telescope will cross it at least twice (In this case 3 times). The waterf ...
X-ray tracing using Geant4 ARTICLE IN PRESS Nuclear Instruments
... details of the interaction of X-rays on a surface can be described by scattering models of various complexity, and are also driven by the type of data describing the microscopic surface details. It is therefore not surprising that even within the same model different surfaces may have different X-ra ...
... details of the interaction of X-rays on a surface can be described by scattering models of various complexity, and are also driven by the type of data describing the microscopic surface details. It is therefore not surprising that even within the same model different surfaces may have different X-ra ...
Lecture 9 Lenses
... because a sphere does not have a perfect focus for light rays A perfect lens (top) focuses all incoming rays to a single point on the optic axis, but a lens ground with spherical surfaces (bottom) focuses different rays to different points along the optic axis, depending on the radial position of ea ...
... because a sphere does not have a perfect focus for light rays A perfect lens (top) focuses all incoming rays to a single point on the optic axis, but a lens ground with spherical surfaces (bottom) focuses different rays to different points along the optic axis, depending on the radial position of ea ...
Physics 262 Lab #5: Geometric Optics John Yamrick
... away from the lens (put at the correct general vicinity using auto-collimation again). Once the position of the nodal point is determined, an image can be created by shining light through the lens in the opposite direction and the process repeated. This will yield the distance between the two nodal ...
... away from the lens (put at the correct general vicinity using auto-collimation again). Once the position of the nodal point is determined, an image can be created by shining light through the lens in the opposite direction and the process repeated. This will yield the distance between the two nodal ...
Bioptic telescopes - The College of Optometrists
... individuals who would benefit from the enhanced visual acuity provided by a bioptic telescope even though they are still coping with the psychological impact of sight loss. Confidence with a bioptic telescope can be determined by the individual with low vision. If potential users are unconcerned at ...
... individuals who would benefit from the enhanced visual acuity provided by a bioptic telescope even though they are still coping with the psychological impact of sight loss. Confidence with a bioptic telescope can be determined by the individual with low vision. If potential users are unconcerned at ...
Philosophical Transactions of the Royal Society of London, 37 (1731
... Use, and having its Surface in such Direction, that when the Index is brought to mark the beginning of the Divisions (i.e. 0º) it may be exactly parallel to that of the other; this Speculum being turned towards the Observer, and the other from him. PR is a Telescope fix’d on one Side of the Octant, ...
... Use, and having its Surface in such Direction, that when the Index is brought to mark the beginning of the Divisions (i.e. 0º) it may be exactly parallel to that of the other; this Speculum being turned towards the Observer, and the other from him. PR is a Telescope fix’d on one Side of the Octant, ...
Eclipsmart Travel Scope 50 Manual
... THE STAR DIAGONAL The star diagonal is a mirror that diverts the light at a right angle to the light path of the telescope. This allows you to observe in a position that is more comfortable than if you had to look straight through. When looking through the eyepiece, the image will appear to be corre ...
... THE STAR DIAGONAL The star diagonal is a mirror that diverts the light at a right angle to the light path of the telescope. This allows you to observe in a position that is more comfortable than if you had to look straight through. When looking through the eyepiece, the image will appear to be corre ...
Astrograph Technical
... ASA Newtonian astrographs all use a fast optical system (hence a small f/#) and are capable of working at multiple focal lengths. This means you can achieve good signal-to-noise ratio with your CCD using short exposure times. The N-series astrographs all have a natural focal ratio of f/3.8, without ...
... ASA Newtonian astrographs all use a fast optical system (hence a small f/#) and are capable of working at multiple focal lengths. This means you can achieve good signal-to-noise ratio with your CCD using short exposure times. The N-series astrographs all have a natural focal ratio of f/3.8, without ...
interferometer_2014
... laser pointer because you get a surprisingly good and reliable light source for under $25. By keeping the distances between the end mirrors and the beam splitter nearly equal, we mitigate problems caused by multimode behavior of the laser. There are only two critical alignment angles in a Michelson ...
... laser pointer because you get a surprisingly good and reliable light source for under $25. By keeping the distances between the end mirrors and the beam splitter nearly equal, we mitigate problems caused by multimode behavior of the laser. There are only two critical alignment angles in a Michelson ...
Improved silver mirror coating for ground and space
... Protected silver coatings for space-based astronomy have been researched by the US government since ...
... Protected silver coatings for space-based astronomy have been researched by the US government since ...
Who really invented lenses? It is generally held that a Dutch
... It is generally held that a Dutch spectacle maker, Hans Lippershey, invented the telescope in 1608. But the origin of the lens itself is shrouded in mystery. In 1850, archeologist John Layard discovered what looks to be a lens at a site he was excavating at the palace of Nimrud in what is now Iraq. ...
... It is generally held that a Dutch spectacle maker, Hans Lippershey, invented the telescope in 1608. But the origin of the lens itself is shrouded in mystery. In 1850, archeologist John Layard discovered what looks to be a lens at a site he was excavating at the palace of Nimrud in what is now Iraq. ...
PPT-Version - EPS 2003, Aachen
... Measurements from 20 expected sources From the extrapolation of the EGRET catalogue data we expect to be able to measure the GRH for 20 extragalactic sources using 50 hours for each. ...
... Measurements from 20 expected sources From the extrapolation of the EGRET catalogue data we expect to be able to measure the GRH for 20 extragalactic sources using 50 hours for each. ...
chromospheric telescope of baikal astrophysical observatory. new light
... turbidity in the polarizers. The complete disassembly of the optical stack to replace the polarizers necessitated the production of new quarter-wave phase plates for the line-shifter because they had been made not from quartz but from crystalline mica (3, 11, 41, Figure 3). The very soft mica plates ...
... turbidity in the polarizers. The complete disassembly of the optical stack to replace the polarizers necessitated the production of new quarter-wave phase plates for the line-shifter because they had been made not from quartz but from crystalline mica (3, 11, 41, Figure 3). The very soft mica plates ...
mems deformable mirrors industry perspective AdAptive imAging thomas Bifano
... used electrostatic charge to locally deform an oil film on a mirror, thereby redirecting incident light for the earliest television projectors. It was this invention that inspired the astronomer Horace Babcock to dream up the concept of adaptive optics (AO), in which a dynamically reshaped mirror lo ...
... used electrostatic charge to locally deform an oil film on a mirror, thereby redirecting incident light for the earliest television projectors. It was this invention that inspired the astronomer Horace Babcock to dream up the concept of adaptive optics (AO), in which a dynamically reshaped mirror lo ...
Year 6: How can you light up your life?
... Working Scientifically: decide where to place rear-view mirrors on cars; design and make a periscope and using the idea that light appears to travel in straight lines to explain how it works. They might investigate the relationship between light sources, objects and shadows by using shadow puppets. ...
... Working Scientifically: decide where to place rear-view mirrors on cars; design and make a periscope and using the idea that light appears to travel in straight lines to explain how it works. They might investigate the relationship between light sources, objects and shadows by using shadow puppets. ...
Modern observing and imaging techniques, with automated goto mounts and... (charge-coupled device) cameras, Introduction
... Students will gain hands on experience with the observatory’s imaging equipment and software to photograph, identify, and study night sky objects. Whether imaging galaxies and star clusters, or taking photometric and spectral data, various instruments are employed according to target type, and their ...
... Students will gain hands on experience with the observatory’s imaging equipment and software to photograph, identify, and study night sky objects. Whether imaging galaxies and star clusters, or taking photometric and spectral data, various instruments are employed according to target type, and their ...
The Surveyors` Heliotrope
... a circular opening. The mirror had two motions so that it could be put in any position. Its center was coincident with the axis of the disks, in all positions. The mirror could be turned so as to throw a beam of light symmetrically through the forward disk, in which position the reflected rays would ...
... a circular opening. The mirror had two motions so that it could be put in any position. Its center was coincident with the axis of the disks, in all positions. The mirror could be turned so as to throw a beam of light symmetrically through the forward disk, in which position the reflected rays would ...
Class 16
... using a second lens. The correct choice for this case is: A) A focusing lens of negative power B) A diverging lens of positive power C) A focusing lens of positive power D) A diverging lens of negative power ...
... using a second lens. The correct choice for this case is: A) A focusing lens of negative power B) A diverging lens of positive power C) A focusing lens of positive power D) A diverging lens of negative power ...
Solar Physics, Space Weather, and Wide-field X-ray
... ● GOES-N is the first of the next generation weather satellites that will include a Solar X-ray Imager (SXI) instrument to provide full solar disc images of the sun at X-ray wavelengths. ● The first model was incorporated into the GOES-N satellite and scheduled for launch in May 2005 (launch was scr ...
... ● GOES-N is the first of the next generation weather satellites that will include a Solar X-ray Imager (SXI) instrument to provide full solar disc images of the sun at X-ray wavelengths. ● The first model was incorporated into the GOES-N satellite and scheduled for launch in May 2005 (launch was scr ...
The Hubble Space Telescope Optical Systems Failure Report
... The rough grinding operation for the Hubble Space Telescope began in December 1978, at the Perkin-Elmer Corporation, in Wilton, Connecticut. The mirror was then transferred to Perkin-Elmer in Danbury, Connecticut, now Hughes Danbury Optical Systems, Inc. (HDOS), where polishing was completed in Apr ...
... The rough grinding operation for the Hubble Space Telescope began in December 1978, at the Perkin-Elmer Corporation, in Wilton, Connecticut. The mirror was then transferred to Perkin-Elmer in Danbury, Connecticut, now Hughes Danbury Optical Systems, Inc. (HDOS), where polishing was completed in Apr ...
The Hubble Space Telescope Optical Systems Failure Report
... The rough grinding operation for the Hubble Space Telescope began in December 1978, at the Perkin-Elmer Corporation, in Wilton, Connecticut. The mirror was then transferred to Perkin-Elmer in Danbury, Connecticut, now Hughes Danbury Optical Systems, Inc. (HDOS), where polishing was completed in Apr ...
... The rough grinding operation for the Hubble Space Telescope began in December 1978, at the Perkin-Elmer Corporation, in Wilton, Connecticut. The mirror was then transferred to Perkin-Elmer in Danbury, Connecticut, now Hughes Danbury Optical Systems, Inc. (HDOS), where polishing was completed in Apr ...
WAVEFRONT SENSOR FOR THE GAIA MISSION
... MLA level. To determine this requirement the differential grid distortion over one line-scan in the field of view is determined. The performance is noted for the grid consisting of all spots, and for 89% of the spots (omitting the extreme spots). The requirement is on all spots, but from the differe ...
... MLA level. To determine this requirement the differential grid distortion over one line-scan in the field of view is determined. The performance is noted for the grid consisting of all spots, and for 89% of the spots (omitting the extreme spots). The requirement is on all spots, but from the differe ...
Optical Fabrication and Testing - National Optical Astronomy
... L. M. Stepp, G. Z. Angeli, S. C. Barden, M. K. Cho, B. L. Ellerbroek , P. E. Gillett, B. Gregory, S. E. Strom OSA Conference on Optical Fabrication and Testing May 3, 2002 AURA New Initiatives Office ...
... L. M. Stepp, G. Z. Angeli, S. C. Barden, M. K. Cho, B. L. Ellerbroek , P. E. Gillett, B. Gregory, S. E. Strom OSA Conference on Optical Fabrication and Testing May 3, 2002 AURA New Initiatives Office ...
Reflecting telescope
A reflecting telescope (also called a reflector) is an optical telescope which uses a single or combination of curved mirrors that reflect light and form an image. The reflecting telescope was invented in the 17th century as an alternative to the refracting telescope which, at that time, was a design that suffered from severe chromatic aberration. Although reflecting telescopes produce other types of optical aberrations, it is a design that allows for very large diameter objectives. Almost all of the major telescopes used in astronomy research are reflectors. Reflecting telescopes come in many design variations and may employ extra optical elements to improve image quality or place the image in a mechanically advantageous position. Since reflecting telescopes use mirrors, the design is sometimes referred to as a ""catoptric"" telescope.