Infrared and Laser Engineering, Volume. 53, Issue 6, 20240083(2024)
Research on the thermomechanical architecture of Dewar of the large format infrared detector (inner cover paper)
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Fig. 3. Three-point adjustment structure based on precision washer
Fig. 5. Schematic diagram of cold transferring of Dewar for large area array infrared detector
Fig. 7. Dewar component thermal simulation note. (a) Cold plate temperature distribution; (b) Focal plane temperature distribution
Fig. 8. Picture of Dewar assembly for large area array infrared detector
Fig. 9. The simulation and test data of the focal plane temperature uniformity
Fig. 11. Dewar component swept sine test. (a)
Table 1. Development table of mosaic large area array infrared detector
View tableView in ArticleTable 1. Development table of mosaic large area array infrared detector
Satellite/infrared camera Number of sub-module pixels Array size Total number of pixels Flatness of focal plane array/μm Working temperature (uniformity of focal plane temperature)/K 注：“（−）”代表未查到相关指标 NOAO/IR[ 10 ]2 k×2 k 2×2 4 k×4 k 15 40(±0.2) VISTA[ 11 ]2 k×2 k 4×4 8 k×8 k 12 80(±0.5) LDCM/TIRS[ 12 ]640×512 3×1 1280×1024 ±8.4 43(−) JWST/NIRCam[ 13 ]4 k×4 k 2×2 8 k×8 k ±20 35(−) Euclid/NISP[ 14 −15 ]2 k×2 k 4×4 8 k×8 k ±10 95(±1) Roman/WFI[ 16 ]4 k×4 k 3×6 12 k×24 k − 95(±0.75) ELT/MICADO[ 17 ]4 k×4 k 3×3 12 k×12 k − − ELT/METIS[ 17 ]2 k×2 k 3×3 6 k×6 k − 80(−)
Table 2. Detector plane tolerance budget breakdown
View tableView in ArticleTable 2. Detector plane tolerance budget breakdown
Item Tolerance/μm Comments Detector optical surface ±2.5 General specification SiC substrate height ±5 Machining accuracy Cold plate flatness ±5 Machining accuracy Total budget ±7.5(summed in quadrature) −
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Yang ZHANG, Defeng MO, Jun LI, Xinmin SHI, Cui FAN, Xue LI. Research on the thermomechanical architecture of Dewar of the large format infrared detector (inner cover paper)[J]. Infrared and Laser Engineering, 2024, 53(6): 20240083
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Received: Feb. 29, 2024
Accepted: --
Published Online: Jul. 31, 2024
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