Optomechanical modeling of the optical telescope element and integrated science instrument module (OTIS) cryo-vacuum test for the James Webb Space Telescope (JWST)

Irvin, Ryan G.; Rohrbach, Scott; Seals, Lenward; Skelton, Dennis L.

doi:10.1117/12.2314487

Cited by 2 publications

(3 citation statements)

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“…3 that the evaluation accuracy of the LCT’s LOS stability is up to the optical sensitivity matrix and the RBD calculation of the optical surface. Hence, the correctness of the LCT’s integrated modeling and analysis could be demonstrated by verifying the calculation method of the optical surfaces’ RBD since the feasibility of the linear optical sensitivity matrix obtained from the image point caused by the perturbation has been well proved in past studies 20 , 29 , 31 , 32 …”

Section: Experimental Verificationmentioning

confidence: 91%

“…Hence, the correctness of the LCT's integrated modeling and analysis could be demonstrated by verifying the calculation method of the optical surfaces' RBD since the feasibility of the linear optical sensitivity matrix obtained from the image point caused by the perturbation has been well proved in past studies. 20,29,31,32 The simulation and verification experiment of the RBDs calculated by the dual quaternion is illustrated in Fig. 15.…”

Section: Optical Sensitivity Of the Truss Rod Section Thicknessmentioning

confidence: 99%

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Integrated modeling and analysis of the microvibration effects on the line-of-sight stability for the space laser communication terminal

Li,

Guo,

Qin

et al. 2024

Opt. Eng.

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Accurately assessing the microvibration effects on the line-of-sight (LOS) stability for the space laser communication terminal (LCT) is crucial for ensuring the long-term stability of communication links. To address this challenge, an integrated modeling approach is proposed to analyze the microvibration effects on the LOS stability for the space LCT. First, the LCT's finite-element model, consisting of the off-axis telescope antenna and the rear optical path, is built to extract the nodes' data of each surface on the optical element under the microvibration. Then the dual quaternion, which could avoid the solution error and insufficient generalization ability of the traditional least squares method, is used to calculate the surface's rigid body displacement on the optical element. Furthermore, combined with the LCT's optical sensitivity matrix obtained by the regression analysis method, the LOS jitter of the terminal is calculated to evaluate the LCT's stability and guide the structural optimization. Finally, a test is conducted to validate the reliability of the integrated modeling approach. Simulation and experimental results show that the method proposed can further improve the accuracy of analysis and guide the structural optimization of LCT.

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Section: Experimental Verificationmentioning

confidence: 91%

Section: Optical Sensitivity Of the Truss Rod Section Thicknessmentioning

confidence: 99%

Integrated modeling and analysis of the microvibration effects on the line-of-sight stability for the space laser communication terminal

Li,

Guo,

Qin

et al. 2024

Opt. Eng.

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show abstract

“…The cryogenic lens in the device uses a flexible bonding scheme. The Near Infrared Camera (NIRCam) instrument for NASA's JWSTJ (ames Webb Space Telescope) was launched in 2021 42 . The lens support system in this instrument is a flexure ring that belongs to anywhere from eight to sixteen flexure springs that hold the lens axially, and an additional eight to sixteen springs that hold the lens radially.…”

Section: Development Of Low Temperature Flexible Supportmentioning

confidence: 99%

Development status of low temperature infrared detection technology

Zhang

et al. 2023

Ninth Symposium on Novel Photoelectronic Detection Technology and Applications

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Optomechanical modeling of the optical telescope element and integrated science instrument module (OTIS) cryo-vacuum test for the James Webb Space Telescope (JWST)

Cited by 2 publications

References 1 publication

Integrated modeling and analysis of the microvibration effects on the line-of-sight stability for the space laser communication terminal

Integrated modeling and analysis of the microvibration effects on the line-of-sight stability for the space laser communication terminal

Development status of low temperature infrared detection technology

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