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42 results for “Image Acquisition”
Rapid Acquisition Imaging Spectrograph (RAISE) Renewal Proposal Project
<p> The optical design of RAISE is based on a new class of UV/EUV imaging spectrometers that use&nbsp; only two reflections to provide quasi-stigmatic performance simultaneously over multiple wavelengths&nbsp; and spatial fields. Figure 5 summarizes the RAISE instrument design, showing photographs of each of&nbsp; the components or subsystems. The design uses an off-axis parabolic telescope mirror to form a real&nbsp; image of the sun on the spectrometer entrance aperture. A slit then selects a portion of the solar image,&nbsp; passing its light onto a near-normal incidence toroidal grating, which re-images the spectrally dispersed&nbsp; radiation onto two array detectors. Two full spectral passbands over the same one-dimensional spatial&nbsp; field are recorded simultaneously with no scanning of the detectors or grating. The two different spectral&nbsp; bands (1st-order 1205-1243&Aring; and 1526-1564&Aring;) are imaged onto two intensified Active Pixel Sensor&nbsp; (APS) detectors whose focal planes are individually adjusted for optimized performance. The telescope&nbsp; and grating are coated with B4C to enhance short wavelength (2nd order) reflectance (Fig. 6), enabling the&nbsp; instrument to record the brightest lines between 602-622&Aring; and 761-780&Aring; at the same time. Table 1&nbsp; summarizes the main optical parameters for RAISE. &nbsp;&nbsp;</p> <p> <strong>TVLS Grating. </strong>The single toroidal variable line space (TVLS) grating has a toroidal surface&nbsp; (Sagittal Radius = 640.5 mm, Tangential Radius = 635.3 mm), with varied line space (VLS) rulings of the&nbsp; type developed originally for spherical substrates by Kita, Harada, and collaborators (1983, 1995). By&nbsp; combining this VLS concept with toroidal surfaces, RAISE is the first to exploit this new class of&nbsp; spectrometers, as described by Thomas (2003). For RAISE, the grating is placed 400 mm behind the slit,&nbsp; with focus at a distance of approximately 1700 mm, for a spectrometer magnification of 4.25. By&nbsp; operating at high magnification, the RAISE spectrometer most effectively utilizes the full length and&nbsp; width available in the sounding rocket payload. The first RAISE grating, mechanically ruled by Bach&nbsp; Research, Inc., was delivered in August 2007 and tested for figure, ruling density and total grating&nbsp; efficiency.&nbsp;</p> <p> <strong>Intensified APS Cameras</strong>. The RAISE Intensified APS camera systems are 1k x 1k CMOS Active&nbsp; Pixel Sensors using miniature digital camera electronics and fed by an MCP intensifier. APS cameras&nbsp; were chosen for RAISE (rather than CCDs) because of their extremely fast readout, direct digital output,&nbsp; low mass, low power, deep full well and high radiation tolerance. The RAISE cameras were developed at&nbsp; DLR (Germany) using a Cypress/Filfactory Star 1000 APS and include a 12-bit external ADC and USB&nbsp; 2.0 interface. We will operate the cameras at 5-10 frames/sec readout, making dark current negligible&nbsp; compared to the incoming signal. The complete camera electronics including its controller is integrated&nbsp; on only one printed circuit board, and uses a rigid-flex 3D-interconnection between the boards to form a&nbsp; lightweight, compact sensor head. Flight detectors were delivered by DLR in August 2008.&nbsp;</p> <p> <strong><em>RAISE Chromospheric Slit Jaw Camera (SJC)&nbsp; </em></strong>To co-align the RAISE spectra with observations from SDO, HINODE, and IRIS, and to collect&nbsp; chromospheric disk images in C IV and the continuum between 1500-1700 &Aring;, the solar image at the&nbsp; telescope focal plane (spectrograph entrance slit plane) is re-imaged onto a SJC mounted on the bo
4D Image-guided Adaptive Radiotherapy for Lung Cancer: Patient Image Acquisition
ClinicalTrials.gov study NCT01018147. IPD Sharing: Not stated. Countries: 0. Publications: 0.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.