Manufacture of a 1.7 m prototype of the GMT primary mirror segments
... ideal surface. The data contain errors on the order of 100 µm in the form of piston, tip and tilt because of errors in the positions of the fiducial points, and these are ignored. We fit Zernike polynomials to the residual errors, typically using polynomials through 6th degree in radius, and take th ...
... ideal surface. The data contain errors on the order of 100 µm in the form of piston, tip and tilt because of errors in the positions of the fiducial points, and these are ignored. We fit Zernike polynomials to the residual errors, typically using polynomials through 6th degree in radius, and take th ...
- IRSA
... The Infrared Spectrograph (IRS) will provide the Space Infrared Telescope Facility (SIRTF) with low and moderate-spectral resolution spectroscopic capabilities from 4 to 40 microns. The IRS is composed of four separate modules, with two of the modules providing R ~ 50 spectral resolution over 4 to 4 ...
... The Infrared Spectrograph (IRS) will provide the Space Infrared Telescope Facility (SIRTF) with low and moderate-spectral resolution spectroscopic capabilities from 4 to 40 microns. The IRS is composed of four separate modules, with two of the modules providing R ~ 50 spectral resolution over 4 to 4 ...
versaScan - Spectra
... In case of a versaScan/BB skip chapter 6.1 and proceed with chapter 6.2. The laser back reflection protection (LBP) is not needed for the versaScan/BB. It is necessary for the versaScan/BB/HE and the versaScan/MB which are reflecting back some part of the 355 nm pump beam light. The LBP has to be in ...
... In case of a versaScan/BB skip chapter 6.1 and proceed with chapter 6.2. The laser back reflection protection (LBP) is not needed for the versaScan/BB. It is necessary for the versaScan/BB/HE and the versaScan/MB which are reflecting back some part of the 355 nm pump beam light. The LBP has to be in ...
Algebra II Module 1, Topic C, Lesson 33: Teacher Version
... is bounced off a flat surface. For light reflecting on a curved surface, angles can be measured using the ray of light and the line tangent to the curve where the light ray touches the curve. As described below in the scaffolding box, it is important for students to understand that the shape of the ...
... is bounced off a flat surface. For light reflecting on a curved surface, angles can be measured using the ray of light and the line tangent to the curve where the light ray touches the curve. As described below in the scaffolding box, it is important for students to understand that the shape of the ...
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 ...
HUYGENS` DIOPTRICA
... explains in the clearest manner how in order to see an object single with both eyes the two images on the retina must be formed at "corresponding points", although apparently he did not perceive that a solid object looks different to each eye; otherwise he might have anticipated Wheatstone and Brews ...
... explains in the clearest manner how in order to see an object single with both eyes the two images on the retina must be formed at "corresponding points", although apparently he did not perceive that a solid object looks different to each eye; otherwise he might have anticipated Wheatstone and Brews ...
optimizing the performance of as-manufactured grazing incidence x
... telescopes have only been conceived and designed for a little over fifty (50) years. The Wolter Type I design is particularly well suited for stellar astronomical telescopes (very small field-ofview). The first orbiting X-ray observatory, HEAO-1 was launched in 1977, a mere twenty-eight (28) years a ...
... telescopes have only been conceived and designed for a little over fifty (50) years. The Wolter Type I design is particularly well suited for stellar astronomical telescopes (very small field-ofview). The first orbiting X-ray observatory, HEAO-1 was launched in 1977, a mere twenty-eight (28) years a ...
Laboratory Exercises in Physics 2
... With a dispersive component the light can be dispersed into a spectrum, i.e. to different colors or different wavelengths. In the measurements a simple optical spectrograph, where the light from a gas-discharge lamp is directed through a narrow slit and a converging lens either to the grating or to ...
... With a dispersive component the light can be dispersed into a spectrum, i.e. to different colors or different wavelengths. In the measurements a simple optical spectrograph, where the light from a gas-discharge lamp is directed through a narrow slit and a converging lens either to the grating or to ...
astronomical eyepieces - Amateur Astronomers Association Delhi
... density of glasses. This eyepiece, with its wide (82 degree) field of view and high ...
... density of glasses. This eyepiece, with its wide (82 degree) field of view and high ...
Paper
... There exists a long family history of chemical agent detectors based on FTIR in this spectral region. The modulator described in this paper is the latest manifestation of FTS design concepts that have been applied to chemical agent detection for nearly three decades. The COIN system (Correlation Int ...
... There exists a long family history of chemical agent detectors based on FTIR in this spectral region. The modulator described in this paper is the latest manifestation of FTS design concepts that have been applied to chemical agent detection for nearly three decades. The COIN system (Correlation Int ...
ALTERNATIVE DESIGNS FOR SPACE X
... mainly for purposes of semiconductor industry. Silicon is relatively light (volume density 2.3 g cm-3) and already during the manufacture process it is lapped and polished (either on one or on both sides) to very fine smoothness (better than few 0.1 nm) and thickness homogeneity (of the order of 1 m ...
... mainly for purposes of semiconductor industry. Silicon is relatively light (volume density 2.3 g cm-3) and already during the manufacture process it is lapped and polished (either on one or on both sides) to very fine smoothness (better than few 0.1 nm) and thickness homogeneity (of the order of 1 m ...
Keck NGAO Relay Design - Caltech Optical Observatories
... and due to the smaller field and thus smaller K-mirror assembly, the previous 2-tier cascaded relay from the conceptual design phase would be redesigned on one level. In order to accommodate the-one tier design, an additional fold mirror was needed in the diverging optical space following the K-mirr ...
... and due to the smaller field and thus smaller K-mirror assembly, the previous 2-tier cascaded relay from the conceptual design phase would be redesigned on one level. In order to accommodate the-one tier design, an additional fold mirror was needed in the diverging optical space following the K-mirr ...
Theory of Pixel Lensing
... are two distinct regimes of pixel lensing which I label \semi-classical" and \spike". The semi-classical regime is similar to classical lensing. Indeed for nearby galaxies like the LMC, semi-classical pixel lensing may be regarded as a simple extension of classical lensing beyond the so-called \crow ...
... are two distinct regimes of pixel lensing which I label \semi-classical" and \spike". The semi-classical regime is similar to classical lensing. Indeed for nearby galaxies like the LMC, semi-classical pixel lensing may be regarded as a simple extension of classical lensing beyond the so-called \crow ...
chd_ddu_a_ldr200906
... from daily PTU profiles, provided by the French Met Office (Météo-France) radiosondes. Then, total background (sky and detection) is estimated from upper levels, where signal-to-noise ratio is very low (typically above 80 km). This second step is the most sensitive part of data processing and the la ...
... from daily PTU profiles, provided by the French Met Office (Météo-France) radiosondes. Then, total background (sky and detection) is estimated from upper levels, where signal-to-noise ratio is very low (typically above 80 km). This second step is the most sensitive part of data processing and the la ...
alignment of the fold mirror
... average positioning will have to be chosen. Place a mirror independent of the spaceframe/weldment assembly, at the grating end of the assembly and adjust it until the return of the laser comes back on itself. Remove the crosshair of the assembly. **Make sure that there is enough room at the grating ...
... average positioning will have to be chosen. Place a mirror independent of the spaceframe/weldment assembly, at the grating end of the assembly and adjust it until the return of the laser comes back on itself. Remove the crosshair of the assembly. **Make sure that there is enough room at the grating ...
Diapositiva 1
... D’Ammando, Pucella, Raiteri, et al., submitted to A&A Serendipitous detection during an AGILE pointing towards the Galactic Center 3 ToO by Swift/XRT: the spectrum becomes harder when the source is brighter GASP-WEBT observed intense optical activity between January and April 2008 RYRM 2009 ...
... D’Ammando, Pucella, Raiteri, et al., submitted to A&A Serendipitous detection during an AGILE pointing towards the Galactic Center 3 ToO by Swift/XRT: the spectrum becomes harder when the source is brighter GASP-WEBT observed intense optical activity between January and April 2008 RYRM 2009 ...
The Unique Optical Design of the NESSI Survey Telescope
... strip of sky at 28deg N latitude as seen from Kitt Peak in Arizona. The telescope was designed by Harland Epps and built and operated by John McGraw and Roger Angel [1]. The CTI primary mirror was the proof of concept mirror for the NASA space telescope project. The mirror was never intended to fly ...
... strip of sky at 28deg N latitude as seen from Kitt Peak in Arizona. The telescope was designed by Harland Epps and built and operated by John McGraw and Roger Angel [1]. The CTI primary mirror was the proof of concept mirror for the NASA space telescope project. The mirror was never intended to fly ...
A Space-Qualified Transmitter System for Heterodyne Optical Communications
... optical frequency is shifted between four possible values, or tones (Fig. 3). The LITE system uses tones that are spaced at 220-MHz intervals, and the system performs heterodyne detection by mixing the received beam with the output from a local-oscillator (La) laser that operates at nearly the same ...
... optical frequency is shifted between four possible values, or tones (Fig. 3). The LITE system uses tones that are spaced at 220-MHz intervals, and the system performs heterodyne detection by mixing the received beam with the output from a local-oscillator (La) laser that operates at nearly the same ...
THE CASSINI VISUAL AND INFRARED MAPPING SPECTROMETER
... itself, its rings, and the plethora of icy moons. Observations of both the day and night sides of these objects shall lead to increased insights into various phenomena involving both reflection and emission of radiation. Occultations of the Sun and stars by these objects should provide new insights ...
... itself, its rings, and the plethora of icy moons. Observations of both the day and night sides of these objects shall lead to increased insights into various phenomena involving both reflection and emission of radiation. Occultations of the Sun and stars by these objects should provide new insights ...