2023-06-05 15:06:05
NASA researchers have developed a new, lightweight and cost-effective imaging scale for use in space.
James P. McGuire Jr. of NASA’s Jet Propulsion Laboratory in Southern California will present the new research at a conference. Design and manufacture of optics Which will be held from 4th to 8th June 2023 in Quebec City, Canada.
“This spectrometer offers the same measurement capabilities as conventional designs, but at one-tenth the size, mass and cost, it is smaller, lighter and cheaper, opening the door to new applications and markets,” McGuire said.
Spectral imaging, also known as hyperspectral imaging, captures information across the electromagnetic spectrum for each pixel in a scene image. When performed from space, it is typically used to observe solids or liquids, which requires high spatial resolution and low spectral resolution, however, smaller and lighter space imaging spectrophotometers that collect atmospheric information are needed, which requires high spectral resolution and resolution spatial low.
In the new work, the researchers present designs for a near-infrared imaging spectrometer (yoke) and long-wave infrared (LWIR) that can help meet this need, spectrometer designs combine desirable features of many existing designs, including an immersed grating that reduces the grating size by a fraction of the refractive index and optical configuration. a little Which uses the same optics before and following the grating, and a grating on the spherical surface simply separates white light into its component color spectra to correct for an optical error known as Petzfall field curvature.
The researchers developed a design for an imaging spectrophotometer yoke which covers the spectral range from 2302 nm to 2370 nm with 2048 spectral pixels and 512 spatial aperture pixels. The lens aperture is f / 1.9Using different materials, they also designed a copy LWIR 8 µm to 12 µm with 1,536 spectral pixels and 256 spatial pixels in The aperture is f / 1.7.
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