Wavefront coded light-field imaging system to achieve substantial retroreflection reduction and anti-laser blinding property

Wang, Lei; Dou, Xinyuan; Ye, Qing; Nie, Jinsong; Sun, Xueliang

doi:10.1016/j.ijleo.2019.162947

Cited by 5 publications

(3 citation statements)

References 15 publications

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“…第 44 卷第 10 期/2024 年 5 月/光学学报反正弦型编码成像系统的极限激光防护能力研究李仰亮 1， 2 ，吴云龙 1， 2* ，叶庆 1， 2** ，魏冰妍 3 ，罗皓琦 1， 2 ，孙可 1， 2 ，张昊 1， 2 ，张文启 4 ，孙晓泉 1， 2 1 国防科技大学脉冲功率激光技术国家重点实验室，安徽合肥 230037； 2 先进激光技术安徽省实验室，安徽合肥 230037； 3 西北工业大学物理科学与技术学院，陕西西安 710129； 4 陆军装甲兵学院士官学校，吉林长春 130000…”

Section: 研究论文unclassified

反正弦型编码成像系统的极限激光防护能力研究

Li Yangliang,

Wu Yunlong,

Ye Qing

et al. 2024

光学学报

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Objective Traditional imaging systems, due to their focal plane structure, exhibit significant optical gain but have a limited depth of focus. This creates a paradoxical scenario: achieving high image quality comes at the expense of weak laser protection capabilities. Established methods for laser protection in optoelectronic imaging systems encounter challenges including reliance on prior knowledge, bandwidth limitations, and degraded image quality. To address the conflict between

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Section: 研究论文unclassified

反正弦型编码成像系统的极限激光防护能力研究

Li Yangliang,

Wu Yunlong,

Ye Qing

et al. 2024

光学学报

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“…Also, the focus effect causes a cat-eye effect leading to easy laser detection, necessitating laser protection for the imaging system 1,2 . Such protection involves prevention of laser blindness and detection 3 . Application of feasible techniques to curtail the optical intensity of the optoelectronic imaging system reaching the image sensor and the cat-eye effect is critical.…”

Section: Introductionmentioning

confidence: 99%

Laser protection performance of a wavefront encoding imaging system with a tangent phase mask

Li,

Ye,

et al. 2023

AOPC 2023: Computing Imaging Technology

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Wavefront encoding is an efficient way to extend the depth of focus of optical imaging systems, and its core component, the phase mask, determines its performance in extending the depth of focus. It is worth noting that wavefront coding technology is also an important method for laser protection. On the one hand, its optical field modulation effect realizes the redistribution of laser energy at the imaging plane, reduces the maximum single-pixel received power, and improves the laser blinding protection capability of the imaging system; on the other hand, its out-of-focus imaging plane can reduce the echo detection received power, and achieves the goal of improving the laser reconnaissance protection capability while ensuring the imaging quality. This article presents a laser transmission model for the tangent phase plate wavefront coding imaging system while exploring its protective performance at varying defocus distances to verify its laser protection potential. The findings show that the system offers efficient protective capabilities, as the maximum single-pixel receiving power decreases by an order of magnitude, and the echo detection receiving power reduces nearly three orders of magnitude. Further, the study assesses the protective performance of the system at different propagation distances. The results indicate that when propagation distances vary between 100 m and 10,000 m, the maximum singlepixel receiving power of the wavefront coding imaging system decreases rapidly and then stabilizes, whereas the echo detection receiving power rapidly decreases to approximately 0 mW. Through systematic simulation, the study successfully explores the laser protection performance of the tangent phase mask wavefront coding imaging system, verifying its effectiveness.

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“…The typical technical scheme is to add different devices such as a filter, baffle, mask and optical isolation in the optical path of the conventional imaging system to prevent the imaging system from generating cat-eye echo, or to place the detector of the conventional imaging system out of focus to reduce the cat-eye echo intensity of the imaging system, as shown in Figure 1b-e [2,11,12]. Some methods are wavelength dependent (optical filter), while other valid retroreflection reduction is achieved at a cost of severe imaging quality loss (defocus, baffle, mask and optical isolation) [2,13]. Take the defocus method to eliminate retroreflection as an example.…”

Section: Introductionmentioning

confidence: 99%

A Retroreflection Reduction Technique Based on the Wavefront Coded Imaging System

et al. 2021

Crystals

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A novel anti-cat-eye effect imaging technique based on wavefront coding is proposed as a solution to the problem of previous anti-cat-eye effect imaging techniques where imaging quality was sacrificed to reduce the retroreflection from the photoelectric imaging equipment. With the application of the Fresnel–Kirchhoff diffraction theory, and the definition of generalized pupil function combining both phase modulation and defocus factors, the cat-eye echo formation of the wavefront coded imaging system is theoretically modeled. Based on the physical model, the diffracted spot profile distribution and the light intensity distribution on the observation plane are further simulated with the changes in the defocus parameter and the phase modulation coefficient. A verification test on the cat-eye laser echo power of the wavefront coded imaging system and that of the conventional imaging system at a 20 m distance are conducted, respectively. Simulations and experiment results show that compared with conventional imaging systems, the wavefront coding imaging system can reduce the retroreflection echo by two orders of magnitude while maintaining better imaging quality through defocusing.

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Wavefront coded light-field imaging system to achieve substantial retroreflection reduction and anti-laser blinding property

Cited by 5 publications

References 15 publications

反正弦型编码成像系统的极限激光防护能力研究

反正弦型编码成像系统的极限激光防护能力研究

Laser protection performance of a wavefront encoding imaging system with a tangent phase mask

A Retroreflection Reduction Technique Based on the Wavefront Coded Imaging System

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