Design and Performance of a Versatile Penn State near IR Imager and Spectrograph

2003 ◽  
Author(s):  
Jian Ge ◽  
Abhijit Chakraborty ◽  
John H. Debes ◽  
Deqing Ren ◽  
Jerry Friedman
Keyword(s):  
Near Ir ◽  
Penn State ◽  
Ir Imager ◽  
And Performance

scholarly journals An Optical Design for an Antarctic 2 m Telescope with a Near IR Imager

2002 ◽  
Vol 19 (3) ◽  
pp. 301-305 ◽  
Author(s):  
P. R. Gillingham
Keyword(s):  
Optical Design ◽  
Detector Array ◽  
Optical Performance ◽  
Primary Mirror ◽  
Low Level ◽  
Near Ir ◽  
Field Curvature ◽  
Ir Imager ◽  
Extraneous Radiation

AbstractA study has been made of the optical performance to be expected from an Antarctic Ritchey Chrétien telescope with a 2 m diameter primary mirror imaging directly onto a detector array in the K and L infrared windows. Near diffraction limited performance is provided across a flat 30 arcmin diameter field by compensating the astigmatism and field curvature with a meniscus lens which also serves as the Dewar window. With baffling inside and Narcissus mirrors outside the Dewar, extraneous radiation can be kept to a low level.

Performance and Selected Applications of an Acousto-Optic Tunable Filter Near-Infrared Spectrometer

1995 ◽  
Vol 49 (2) ◽  
pp. 177-180 ◽  
Author(s):  
Martin Hühne ◽  
Ursula Eschenauer ◽  
Heinz W. Siesler
Keyword(s):  
Aqueous Solution ◽  
Fiber Optics ◽  
Near Infrared ◽  
Tunable Filter ◽  
Near Ir ◽  
Infrared Spectrometer ◽  
And Performance ◽  
Contact Free ◽  
Near Infrared Spectrometer

The design and applications of a near-infrared (near-IR) spectrometer with an acousto-optic tunable filter (AOTF) as monochromator and light fiber optics are described. The aim of this spectrometer is rapid product and reaction control via remote sensing and chemometric data evaluation. Its application and performance are illustrated by the determination of the water content of acetone and by the contact-free temperature measurement of an aqueous solution.

scholarly journals CREATION OF UNISCOPE: A MODEL FOR REWARDING ALL FORMS OF SCHOLARSHIP

2019 ◽  
Vol 7 (2) ◽  
Author(s):  
Elise A. Gurgevich ◽  
Drew Hyman ◽  
Theodore R. Alter
Keyword(s):  
Learning Community ◽  
Full Range ◽  
State University ◽  
Promotion And Tenure ◽  
Deliberative Dialogue ◽  
Recommendations For Action ◽  
Penn State ◽  
And Performance ◽  
Faculty And Administrators ◽  
The University

On March 24, 1998, a small group of faculty and administrators at the Pennsylvania State University (PSU) formed a learning community to engage in a deliberative dialogue about recognizing and documenting outreach scholarship in the University. We chose UniSCOPE, University Scholarship and Criteria for Outreach and Performance Evaluation, as a title to encapsulate our mission. Our goal was to consider the meaning of scholarship in the contemporary university and to consider the role of outreach therein. We did this in the context of the Penn State promotion and tenure system to gain a better understanding of its effect on scholarship. We quickly learned that outreach scholarship cannot be examined in isolation, and we broadened our deliberations to consider the full range of scholarship. This report articulates a multidimensional model of scholarship in general, of which outreach scholarship is a key component and presents our recommendations for action.

scholarly journals Infrared Array Detectors: Performance and Prospects

1995 ◽  
Vol 167 ◽  
pp. 69-78
Author(s):  
Ian S. McLean
Keyword(s):  
Near Infrared ◽  
Imaging System ◽  
State Of The Art ◽  
Low Noise ◽  
Infrared Images ◽  
Near Ir ◽  
Array Detectors ◽  
And Performance ◽  
Compare And Contrast ◽  
Infrared Array

Infrared array detectors, like silicon CCDs a decade before, have revolutionized infrared astronomy. The quality and performance of the current generation of devices has already allowed astronomers to obtain infrared images at wavelengths out to 2.2 microns which are as deep as the best CCD images. High resolution infrared spectroscopy is now a reality and ground-based imaging to 35 microns has been achieved. Several classes of low-noise infrared array detectors with formats of 256 × 256 pixels are now in routine use, and developments are under way which will produce detectors of 1024 × 1024 pixels (for the near IR) within the next year. This paper will briefly review the state-of-the-art and compare and contrast the properties of available arrays. Progress in the field is illustrated with recent near infrared photometry obtained with a new two-channel imaging system developed at UCLA.

scholarly journals Design and performance of hafnium optical and near-IR kinetic inductance detectors

2019 ◽  
Vol 115 (21) ◽  
pp. 213503 ◽  
Author(s):  
Nicholas Zobrist ◽  
Grégoire Coiffard ◽  
Bruce Bumble ◽  
Noah Swimmer ◽  
Sarah Steiger ◽  
...  
Keyword(s):  
Kinetic Inductance Detectors ◽  
Kinetic Inductance ◽  
Near Ir ◽  
And Performance

EPITAXIAL DESIGN AND PERFORMANCE OF AlGaInP RED (650–690 nm) VCSELs

1994 ◽  
Vol 05 (04) ◽  
pp. 625-666 ◽  
Author(s):  
R.P. SCHNEIDER ◽  
J.A. LOTT ◽  
M. HAGEROTT CRAWFORD ◽  
K.D. CHOQUETTE
Keyword(s):  
Cavity Surface ◽  
Bragg Reflectors ◽  
Distributed Bragg Reflectors ◽  
Device Structure ◽  
Near Ir ◽  
Vertical Cavity Surface ◽  
Key Issues ◽  
Surface Emitting Laser ◽  
And Performance ◽  
Vertical Cavity

Progress in addressing critical epitaxial design issues associated with AlGaInP -based visible (red) vertical-cavity surface-emitting laser (VCSEL) diodes is reviewed, with emphasis on those issues that differentiate red VCSELs from conventional AlGaAs -based near-IR VCSELs. Key issues include epitaxial growth techniques for red VCSELs, the unique properties of AlGaInP alloys and heterostructures, design and growth of visible distributed Bragg reflectors, and integration of AlGaInP and AlGaAs hetero-structures into the hybrid VCSEL device structure. The performance characteristics of AlGaInP/AlGaAs red VCSEL diodes are overviewed in the context of the epitaxial design.

Surface Brightness Scale of Galactic Cepheids

1999 ◽  
Vol 190 ◽  
pp. 561-562
Author(s):  
G. P. Di Benedetto
Keyword(s):  
Surface Brightness ◽  
Variable Stars ◽  
Giant Stars ◽  
Near Ir

An accurate calibration of the surface brightness scaleSVas a function of the near-IR color (V–K) has been recently measured for non-variable Galactic dwarf and giant stars. It can be shown that this correlation can be applied to theSVscale of Galactic Cepheid variable stars, which are of major cosmological interest.

Transmission Scanning Electron Microscopy and Energy Analysis with the Siemens ELMISKOP 101

1972 ◽  
Vol 30 ◽  
pp. 450-451
Author(s):  
H. M. Thieringer
Keyword(s):  
Objective Lens ◽  
Transmission Microscopy ◽  
Image Recording ◽  
Mode Of Operation ◽  
Scanning Transmission ◽  
Electron Microscopes ◽  
And Performance ◽  
Convergent Beam ◽  
Ray Path ◽  
Beam Diffraction

It has repeatedly been show that with conventional electron microscopes very fine electron probes can be produced, therefore allowing various micro-techniques such as micro recording, X-ray microanalysis and convergent beam diffraction. In this paper the function and performance of an SIEMENS ELMISKOP 101 used as a scanning transmission microscope (STEM) is described. This mode of operation has some advantages over the conventional transmission microscopy (CTEM) especially for the observation of thick specimen, in spite of somewhat longer image recording times.Fig.1 shows schematically the ray path and the additional electronics of an ELMISKOP 101 working as a STEM. With a point-cathode, and using condensor I and the objective lens as a demagnifying system, an electron probe with a half-width ob about 25 Å and a typical current of 5.10-11 amp at 100 kV can be obtained in the back focal plane of the objective lens.

Angular Resolved Electron Spectroscopy with Parallel Recording

1990 ◽  
Vol 48 (2) ◽  
pp. 370-371
Author(s):  
Huang Min ◽  
P.S. Flora ◽  
C.J. Harland ◽  
J.A. Venables
Keyword(s):  
Electron Spectroscopy ◽  
Low Voltage ◽  
Solid Angle ◽  
Detection System ◽  
Voltage Electron ◽  
Cylindrical Mirror ◽  
Inner Radius ◽  
Channel Plate ◽  
And Performance ◽  
Type Detector

A cylindrical mirror analyser (CMA) has been built with a parallel recording detection system. It is being used for angular resolved electron spectroscopy (ARES) within a SEM. The CMA has been optimised for imaging applications; the inner cylinder contains a magnetically focused and scanned, 30kV, SEM electron-optical column. The CMA has a large inner radius (50.8mm) and a large collection solid angle (Ω > 1sterad). An energy resolution (ΔE/E) of 1-2% has been achieved. The design and performance of the combination SEM/CMA instrument has been described previously and the CMA and detector system has been used for low voltage electron spectroscopy. Here we discuss the use of the CMA for ARES and present some preliminary results.The CMA has been designed for an axis-to-ring focus and uses an annular type detector. This detector consists of a channel-plate/YAG/mirror assembly which is optically coupled to either a photomultiplier for spectroscopy or a TV camera for parallel detection.

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