Arid
A compact high-resolution 3-D imaging spectrometer for discovering oases on Mars
Ge, J; Ren, DQ; Lunine, JI; Brown, RH; Yelle, RV; Soderblom, LA
通讯作者Ge, J
会议名称Conference on Instruments, Methods and Missions for Astrobiology V
会议日期AUG 22-23, 2002
会议地点WAIKOLOA, HI
英文摘要

Two key infrared instrument components, high resolution silicon grisms and cryogenic image slicers, are being developed at Penn State under NASA support for potential applications in future Mars missions. These new instrument components are planned to be used in a new kind of instrument called a CUBE Machine for detecting and characterizing possible organic compounds on the martian surface through spectroscopically observing martian rocks, soil, and organic matter in IR wavelengths (1-5 mum). It is a compact, robust and light-weight 3D near-IR imaging spectrometer and takes full advantage of these new instrument components to enable an order of magnitude improvement in spectral resolution and observing efficiency and also large simultaneous wavelength coverage (similar to1-5 mum). Due to high dispersion (n = 3.4), silicon grisms provide at least 2 times higher spectral dispersion than any commercially made grisms. These silicon grisms will be the key elements for making the instrument compact enough to fit into spacecrafts and simultaneously provide high enough spectral resolution to resolve the weak spectral features from organic materials. The reflective imaging slicers enable us to collect spectral information from the Mars surface in three dimensional form - two spatial dimensions and one spectral dimension. This unique capability obviates the need to make many scans to build up the data cube as traditional instruments such as spot scanned spectrometers, or slit scanned spectrometers, resulting in an order of magnitude increase in observing efficiency. In addition, use of the Cube Machine to produce spectral maps of a target body will result in dramatically reduced operational complexity, data processing complexity, and increased geometric fidelity of the final data. With current available large IR arrays such as 2kx2k HgCdTe arrays this new instrument will provide large simultaneous wavelength coverage at high spectral resolution. We have successfully developed silicon grisms with 1 inch in dimension and 54.7 degree in blaze angle. These grisms can provide a diffraction-limited spectral resolution of R similar to 20,000 at 2 mum, which is already high enough for most astrobiology space mission applications. The grisms have very smooth grating facets, with typical rms roughness of similar to 9 nm, indicating a total integrated scattered light level less than 1% in the entire IR wavelengths to allow high precision spectroscopy. The optical design of the image slicers has been finished. The optics required to assemble a prototype image slicer is being procured.


英文关键词silicon grisms image slicers 3-D imaging spectroscopy Mars missions infrared
来源出版物INSTRUMENTS, METHODS, AND MISSIONS FOR ASTROBIOLOGY V
ISSN0277-786X
出版年2002
卷号4859
页码45-56
ISBN0-8194-4638-6
出版者SPIE-INT SOC OPTICAL ENGINEERING
类型Proceedings Paper
语种英语
国家USA
收录类别CPCI-S
WOS记录号WOS:000182251800004
WOS关键词INTEGRAL-FIELD SPECTROSCOPY ; INFRARED-SPECTROSCOPY ; NGST ; TELESCOPES ; DESIGN ; GRISM
WOS类目Biology ; Geosciences, Multidisciplinary ; Instruments & Instrumentation ; Remote Sensing
WOS研究方向Life Sciences & Biomedicine - Other Topics ; Geology ; Instruments & Instrumentation ; Remote Sensing
资源类型会议论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/293822
作者单位(1)Penn State Univ, Dept Astron & Astrophys, Davey Lab 525, University Pk, PA 16802 USA
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Ge, J,Ren, DQ,Lunine, JI,et al. A compact high-resolution 3-D imaging spectrometer for discovering oases on Mars[C]:SPIE-INT SOC OPTICAL ENGINEERING,2002:45-56.
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