How Dark the Sky: The JWST Backgrounds
Sign Up to like & getrecommendations! Published in 2022 at "Publications of the Astronomical Society of the Pacific"
DOI: 10.1088/1538-3873/acbcf4
Abstract: We describe the sources of stray light and thermal background that affect JWST observations, report actual backgrounds as measured from commissioning and early-science observations, compare these background levels to prelaunch predictions, estimate the impact of… read more here.
Keywords: science; sky jwst; stray light; jwst ... See more keywords
Stray Light Elimination Method Based on Recursion Multi-Scale Gray-Scale Morphology for Wide-Field Surveillance
Sign Up to like & getrecommendations! Published in 2021 at "IEEE Access"
DOI: 10.1109/access.2021.3053564
Abstract: The wide-field surveillance camera plays a critical role in space debris detection and the visible light situational awareness required for early warning. However, stray light in such a system has always been a serious problem.… read more here.
Keywords: surveillance; method; multi scale; stray light ... See more keywords
Landsat 9 Thermal Infrared Sensor 2 (TIRS-2) Stray Light Mitigation and Assessment
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Transactions on Geoscience and Remote Sensing"
DOI: 10.1109/tgrs.2022.3177312
Abstract: The Thermal Infrared Sensor 2 (TIRS-2) payload for the Landsat 9 mission closely follows the design of the TIRS instrument currently flying aboard Landsat 8. The TIRS-2 instrument, however, incorporates an important design change to… read more here.
Keywords: tirs instrument; sensor tirs; design; stray light ... See more keywords
Nonuniformity correction scheme considering the effects of internal thermal stray light
Sign Up to like & getrecommendations! Published in 2017 at "Optical Engineering"
DOI: 10.1117/1.oe.56.1.013104
Abstract: Abstract. A stray light compensated nonuniformity correction (SLCNUC) method is proposed for infrared (IR) cameras. The proposed approach formulates thermal stray light compensation functions according to the internal temperature changes of the IR camera. To… read more here.
Keywords: stray; nonuniformity correction; stray light; thermal stray ... See more keywords
Stray light entrance pupil: an efficient tool for stray light characterization
Sign Up to like & getrecommendations! Published in 2020 at "Optical Engineering"
DOI: 10.1117/1.oe.59.2.025102
Abstract: Abstract. Stray light represents a major performance limitation for optical instruments. Analyses are done with ray-tracing software to evaluate the stray light performances of a design and, if necessary, improve it before manufacturing. Accurate simulations,… read more here.
Keywords: entrance pupil; efficient tool; stray light; light entrance ... See more keywords
Low-stray-light concave holographic gratings processed by combining the methods of photoresist hot-melting and oxygen-ion ashing.
Sign Up to like & getrecommendations! Published in 2020 at "Applied optics"
DOI: 10.1364/ao.386465
Abstract: The principal motivation for this paper is to reduce stray light and line roughness in concave holographic gratings (CHG). Compared with other previously reported line-smoothing grating techniques such as dynamic-exposure near-field holography, we successfully improve… read more here.
Keywords: stray light; holographic gratings; concave holographic; photoresist hot ... See more keywords
Design for stray-light reduction to a Martian ionospheric imager.
Sign Up to like & getrecommendations! Published in 2020 at "Applied optics"
DOI: 10.1364/ao.401523
Abstract: We demonstrate a new design high-contrast optics suitable for use on a stray-light reduction. Two-dimensional distribution of diffracted light was numerically analyzed and confirmed by a laboratory measurement to determine its characteristics. Laboratory measurements confirm… read more here.
Keywords: reduction; stray light; light reduction; optics ... See more keywords
Simulation and analysis of atmospheric scattering in stray light testing for point source transmittance.
Sign Up to like & getrecommendations! Published in 2021 at "Applied optics"
DOI: 10.1364/ao.409656
Abstract: We propose a full-band model to quantitatively calculate terrestrial atmospheric scattering in stray light testing based on the Monte Carlo algorithm. Measurements are conducted using two classifications of air cleanliness at off-axis angles from 35°… read more here.
Keywords: light testing; stray light; atmospheric scattering; simulation analysis ... See more keywords
Optical design and stray light control for a space-based laser space debris removal mission.
Sign Up to like & getrecommendations! Published in 2021 at "Applied optics"
DOI: 10.1364/ao.432386
Abstract: In low-Earth orbit, the already existing population of small and medium debris (between 1 cm and several dozens of cm) is a concrete threat to operational satellites. A space-based laser space debris removal (SLDR) system… read more here.
Keywords: space; stray light; light control; debris ... See more keywords
Stray light control for the space-agile optical system with a pointing mirror.
Sign Up to like & getrecommendations! Published in 2023 at "Applied optics"
DOI: 10.1364/ao.483427
Abstract: The space-agile optical composite detection (SOCD) system with a pointing mirror possesses flexible and fast response ability. Like other space telescopes, if the stray light is not properly eliminated, it may result in a false… read more here.
Keywords: system; pointing mirror; stray light; space agile ... See more keywords
Directional polarimetric camera stray light analysis and correction.
Sign Up to like & getrecommendations! Published in 2019 at "Applied optics"
DOI: 10.1364/ao.58.007042
Abstract: The directional polarimetric camera is a polarization sensor that offers an ultrawide angle and low-distortion imaging. Stray light is one of the important factors affecting the accuracy of its polarization measurement. In this paper, the… read more here.
Keywords: correction; polarimetric camera; stray light; directional polarimetric ... See more keywords