Results 251 to 260 of about 26,366,925 (292)

Stray-light analysis of Amon-Ra instrument

SPIE Proceedings, 2005
The Amon-Ra instrument is the main optical payload of the EARTHSHINE satellite and a unique Earth reflectance monitor. It consists of two separate optical systems, one imaging photon fluxes over the visible waveband and the other bolometrically measuring global emissions while the satellite orbits about the L1-Lagrange point.
Hanshin Lee, Sug-Whan Kim, Tony Richards, Ian Tosh, Nigel Morris, Mike Lockwood   +5 more
openaire   +1 more source

Stray-light analysis for multimodal miniature microscope

SPIE Proceedings, 2002
Most conventional imaging systems suffer from unwanted and unexpected stray light that is often caused by reflections and scattering from optics and opto-mechanical features. This problem is easily missed during a design procedure that concentrates on improvement of imaging performance.
Junwon Lee, Jeremy D. Rogers, Chen Liang, Rebecca R. Richards-Kortum, Michael R. Descour   +4 more
openaire   +1 more source

Preliminary stray light analysis for the StarLight Mission

2001 IEEE Aerospace Conference Proceedings (Cat. No.01TH8542), 2002
StarLight (formerly ST3) is a separated spacecraft interferometer mission scheduled for launch in late 2005. StarLight will be the first space mission ever to perform astronomical observations on one spacecraft while a large object (a second spacecraft, in full sun), is intentionally placed in the instrument field of view.
C. Noecker, J. Fleming, P. Gorham
openaire   +1 more source

Stray light analysis and reduction for IFU spectrograph LLAMAS

Ground-based and Airborne Instrumentation for Astronomy VIII, 2020
The Large Lenslet Array Magellan Spectrograph (LLAMAS) is an Integral Field Unit (IFU) spectrograph under construction as a facility instrument for the 6.5-meter Magellan Telescopes. For each pointing, LLAMAS delivers 2400 optical spectra (λ =350-970nm) over a 37”x37” celestial solid angle with a resolution of 2000 through a densely packed microlens ...
Frostig, Danielle, Piotrowski, John, Clark, Kristin, Coppeta, David, Egan, Mark D, Furész, Gábor, Gabutti, Michelle, Masterson, Rebecca A, Malonis, Andrew, Simcoe, Robert A   +9 more
openaire   +2 more sources

Analysis of stray light in most complex situations

SPIE Proceedings, 2007
To analyze ghost effects in optical systems including decentred coatings with thickness variations, polarized light and interactions with object and image planes is a difficult task. Thanks to a battery of tools especially developed in the last ten years and applied to many different situations, it is possible to do such jobs in a quick and elegant ...
openaire   +1 more source

Basic Radiometry for Stray Light Analysis

2013
Radiometry is the science of detecting and measuring optical radiation, and is necessary to perform stray light analysis. Optical radiation is an electromagnetic wave whose wavelength λ is between 1 A— 10−2 and 1 A— 103μm. Optical radiation includes the ultraviolet, visible, and infrared portions of the electromagnetic spectrum.
openaire   +1 more source

Stray light analysis for TianQin laser interferometry

Classical and Quantum Gravity
Abstract Stray light is one of the critical noise components in space-based gravitational wave observatories, such as TianQin and LISA. The noise contribution of stray light effect depends on its phase difference and power ratio compared with the nominal light, which are determined by the overall optical system design rather than ...
Wencai Xu, Huizong Duan, Kaihang Wu, Dexuan Zhang, Beichen Wang, Jiongyu Gao, Xiaojie Wang, Dingyin Tan, Hsien-Chi Yeh   +8 more
openaire   +1 more source

Contamination scatter functions for stray-light analysis

SPIE Proceedings, 2002
The 1992 work by Paul Spyak and William Wolfe correlating particulate contamination scatter with the predictions of Mie scatter theory has been extended and applied to the analysis of optical systems. Spyak & Wolfe's BRDF results, as applied to Mil-Spec 1246B particle distribution have been often misunderstood and misapplied.
openaire   +1 more source

Stray light design and analysis of SIRTF CTA

SPIE Proceedings, 1999
Ball Aerospace is building the Cryogenic Telescope Assembly (CTA) for the Space IR Telescope Facility (SIRTF) project and stray light control is a critical part of this effort. The heliocentric orbit where the Sun is never allowed to illuminate the CTA and the Earth is relatively far away is a key feature for stray light control. Mirror and paint BRDFs
openaire   +1 more source

Stray light analysis of basic model Gaussian beam

SPIE Proceedings, 2002
In this paper, based upon the general law oftransmission ofbasic model Gaussian beam, the reflection and refraction of laser at optical surfaces are analyzed respectively. Using the complex parameters of Gaussion beam, a simple algorithm for researching stray light and ghosts caused by Gaussian beam is presented.
Zhaofeng Cen, Xiaotong Li, Zhiping He, Qihua Zhu, Qingquan Zhang   +4 more
openaire   +1 more source