Internal and external stray radiation suppression for LWIR catadioptric telescope using non-sequential ray tracing

Zhu, Yang; Zhang, Xin; Liu, Tao; Wu, Yicheng; Shi, Guang; Wang, Lingjie

doi:10.1016/j.infrared.2015.03.008

Cited by 20 publications

(2 citation statements)

References 20 publications

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“…To achieve high temperature detection sensitivity for a cooled infrared (IR) optical imaging system, series of complete stray radiation suppression measures should be adopted [1][2][3][4] ]. Application of the so-called cold shield matching with a reimaging relay lens is the most effective solution to depress the stray radiation outside the field of view (FOV) [5,6] .…”

Section: Introductionmentioning

confidence: 99%

Cold shield matching of cooled infrared system based on telecentric optical structure

Hu,

wang,

Chen

et al. 2024

Advanced Fiber Laser Conference (AFL2023)

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To solve the problem of cold shield matching in a cooled infrared (IR) imaging optical system with aperture stop placed away from the lens, a pupil matching method based on the telecentric optical structure is proposed. The formulae of Gaussian parameters between the relay lens and the objective lens are derived by using the ideal imaging process. A specific discussion and numerical analysis are carried out. The objective lens is designed as image-space telecentric and the relay lens is designed as object-space telecentric to achieve the requirement that the aperture stop far away from the objective lens. And a specific designing example is added to show the effectiveness of the analysis.

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Section: Introductionmentioning

confidence: 99%

Cold shield matching of cooled infrared system based on telecentric optical structure

Hu,

wang,

Chen

et al. 2024

Advanced Fiber Laser Conference (AFL2023)

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“…In order to quantitatively study the distribution of stray radiation, the simulation method is widely used to analyze the stray radiation in optical imaging systems [6][7][8][9][10]. Although there are many simulation methods to effectively predict and analyze the stray light of infrared imaging optical systems, the causes of stray radiation are very complex, which are related not only to the design, manufacturing process, and material characteristics of the infrared imaging system, but also to the aberration, target surface characteristics, and thermal radiation of system components.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Stray Radiation Suppression in Infrared Imaging System Using a Novel Broadband and High-Absorption Ceramic Coating

et al. 2021

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Aiming at addressing the vulnerability of the infrared imaging opto-mechanical system to stray radiation interference caused by an external laser, a new method with a broadband and high-absorptivity ceramic coating on the inner wall of the system is proposed to reduce the stray radiation intensity, which is helpful to improve the imaging quality of the detection image. Based on plasma electrolytic oxidation (PEO) technology, the preparation method and properties of a novel ceramic coating are studied, and a long-wave infrared imaging optical system with high-absorption ceramic coating is designed and developed. It is verified for the first time that the high-absorption ceramic coating can suppress the stray radiation in the infrared opto-mechanical system, and the effect of laser incident power and angle on the stray radiation is investigated. The experimental results show that the ceramic coating can achieve 95.4% high absorption in the wavelength range of 0.2–16 μm, which can obviously suppress the stray radiation in the opto-mechanical system of infrared imaging caused by laser. The calculation of the stray radiation suppression ratio shows that, compared with the case without coating, the stray radiation intensity in the system can be reduced by 70% using the ceramic coating.

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Numerical simulation of closest vane thermal performance in large aperture Space Solar Telescope

Wang

et al. 2016

Applied Thermal Engineering

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Internal and external stray radiation suppression for LWIR catadioptric telescope using non-sequential ray tracing

Cited by 20 publications

References 20 publications

Cold shield matching of cooled infrared system based on telecentric optical structure

Cold shield matching of cooled infrared system based on telecentric optical structure

Investigation of Stray Radiation Suppression in Infrared Imaging System Using a Novel Broadband and High-Absorption Ceramic Coating

Numerical simulation of closest vane thermal performance in large aperture Space Solar Telescope

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