Testing fiber tapers for use in the SDSS-V focal plane system

AbstractTo map the distribution of galaxies and quasars in the universe, we desire a telescope large enough to obtain spectra to about 20th magnitude in under 20 minutes integration and which is devoted entirely to such spectroscopic survey projects in dark time. We also desire extensive bright time observing to monitor large numbers of G-M stars with high-resolution spectroscopy for many years in search of solar-like activity. These projects are suited to a telescope with a large fixed primary, assembled from many spherically figured segments. We present a design for such a telescope that consists of 73 segments, each of 0.9-m diameter and 26-m radius of curvature. Mirror blanks of this size can be cut from standard Pyrex sheets. Effective aperture of the telescope exceeds 7-m; the focal plane system can track objects for 40 minutes, and sky coverage of 48 degrees is obtained by using a fixed tilt for the primary and making the entire telescope and dome rotatable. The focal plane system is lightweight and precisely pointable because spectrographs are coupled to the focus by fiber optic cables. Off-the-shelf components and existing technology are used to keep engineering and development costs low; we must remain within a budget feasible for a university. Because the telescope will be equipped with standard, minimal instrumentation and is intended for very routine observing programs, operating costs will also be low. Hardware components are now being assembled in a laboratory to develop the focal plane control system and the mirror support system.

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Analysis and Control of Narcissus Effect of Cooling IR Focal Plane System

Acta Optica Sinica ◽

10.3788/aos201232.0222007 ◽

2012 ◽

Vol 32 (2) ◽

pp. 0222007

Author(s):

刘洋 Liu Yang ◽

安晓强 An Xiaoqiang

Keyword(s):

Focal Plane ◽

Plane System ◽

And Control

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Highly integrated multi-spectral TDI CCD focal plane system

Infrared and Laser Engineering ◽

10.3788/irla201645.1018006 ◽

2016 ◽

Vol 45 (10) ◽

pp. 1018006 ◽

Cited By ~ 2

Author(s):

张达 Zhang Da ◽

李巍 Li Wei

Keyword(s):

Focal Plane ◽

Plane System

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Highly integrated multi-spectral TDI CCD focal plane system

Infrared and Laser Engineering ◽

10.3788/irla20164510.1018006 ◽

2016 ◽

Vol 45 (10) ◽

pp. 1018006

Author(s):

张达 Zhang Da ◽

李巍 Li Wei

Keyword(s):

Focal Plane ◽

Plane System

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A robotic Focal Plane System (FPS) for the Sloan Digital Sky Survey V

Ground-based and Airborne Instrumentation for Astronomy VIII ◽

10.1117/12.2561113 ◽

2020 ◽

Author(s):

Richard W. Pogge ◽

Mark A. Derwent ◽

Thomas P. O'Brien ◽

Colby A. Jurgenson ◽

Daniel Pappalardo ◽

...

Keyword(s):

Focal Plane ◽

Sloan Digital Sky Survey ◽

Plane System ◽

Sky Survey

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The Mid-Infrared Instrument for theJames Webb Space Telescope, VIII: The MIRI Focal Plane System

Publications of the Astronomical Society of the Pacific ◽

10.1086/682258 ◽

2015 ◽

Vol 127 (953) ◽

pp. 675-685 ◽

Cited By ~ 22

Author(s):

M. E. Ressler ◽

K. G. Sukhatme ◽

B. R. Franklin ◽

J. C. Mahoney ◽

M. P. Thelen ◽

...

Keyword(s):

Focal Plane ◽

Mid Infrared ◽

Space Telescope ◽

Plane System

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Tandem scanning reflected light microscopy: How it works and applications

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100142104 ◽

1986 ◽

Vol 44 ◽

pp. 84-87

Author(s):

Alan Boyde ◽

Milan Hadravský ◽

Mojmír Petran ◽

Timothy F. Watson ◽

Sheila J. Jones ◽

...

Keyword(s):

Light Microscopy ◽

Focal Plane ◽

Central Symmetry ◽

Single Line ◽

Scanning Microscope ◽

Reflected Light ◽

Illuminating Light ◽

Illuminating Beam

The principles of tandem scanning reflected light microscopy and the design of recent instruments are fully described elsewhere and here only briefly. The illuminating light is intercepted by a rotating aperture disc which lies in the intermediate focal plane of a standard LM objective. This device provides an array of separate scanning beams which light up corresponding patches in the plane of focus more intensely than out of focus layers. Reflected light from these patches is imaged on to a matching array of apertures on the opposite side of the same aperture disc and which are scanning in the focal plane of the eyepiece. An arrangement of mirrors converts the central symmetry of the disc into congruency, so that the array of apertures which chop the illuminating beam is identical with the array on the observation side. Thus both illumination and “detection” are scanned in tandem, giving rise to the name Tandem Scanning Microscope (TSM). The apertures are arranged on Archimedean spirals: each opposed pair scans a single line in the image.

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Imaging sub-micron objects with light microscopy: Visualization of the T-4 bacteriophage

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100156158 ◽

1989 ◽

Vol 47 ◽

pp. 834-835

Author(s):

Malcolm Brown ◽

Reynolds M. Delgado ◽

Michael J. Fink

Keyword(s):

Electron Microscopy ◽

Light Microscopy ◽

Focal Plane ◽

Phase Contrast ◽

Dark Field ◽

E Coli ◽

Polystyrene Beads ◽

Television Camera ◽

Transmission Electron ◽

Universal Microscope

While light microscopy has been used to image sub-micron objects, numerous problems with diffraction-limitations often preclude extraction of useful information. Using conventional dark-field and phase contrast light microscopy coupled with image processing, we have studied the following objects: (a) polystyrene beads (88nm, 264nm, and 557mn); (b) frustules of the diatom, Pleurosigma angulatum, and the T-4 bacteriophage attached to its host, E. coli or free in the medium. Equivalent images of the same areas of polystyrene beads and T-4 bacteriophages were produced using transmission electron microscopy.For light microscopy, we used a Zeiss universal microscope. For phase contrast observations a 100X Neofluar objective (N.A.=1.3) was applied. With dark-field, a 100X planachromat objective (N.A.=1.25) in combination with an ultra-condenser (N.A.=1.25) was employed. An intermediate magnifier (Optivar) was available to conveniently give magnification settings of 1.25, 1.6, and 2.0. The image was projected onto the back focal plane of a film or television camera with a Carl Zeiss Jena 18X Compens ocular.

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