Assessment Methods of Smoke Screening and Interference Effect

Liuying Chen; Xiaoxia Li; Xiaonong Wang; Bo Xie

doi:10.3788/LOP230725

Laser & Optoelectronics Progress, Volume. 60, Issue 22, 2200004(2023)

Assessment Methods of Smoke Screening and Interference Effect

Liuying Chen¹, Xiaoxia Li^1,2,3、*, Xiaonong Wang^1,2,3, and Bo Xie^1,3

¹State Key Laboratory of Pulsed Power Laser Technology, College of Electronic Engineering, National University of Defense Technology, Hefei 230037, Anhui, China

²Laboratory of Advanced Laser Technology of Anhui Province, Hefei 230037, Anhui, China

³Infrared and Low Temperature Plasma Key Laboratory of Anhui Province, Hefei 230037, Anhui, China

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Figures & Tables(7)

Fig. 1. Relationship between transmittance and change of physical parameters^[19].(a) Particle radius; (b) smoke concentration; (c) particle mass density; (d) smoke thickness

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Fig. 2. Target and background gray value and their position selection before and after smoke screening^[28]. (a) Before screening; (b) after screening

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Fig. 3. Smoke box test distribution

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Fig. 4. Test process^[50]

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Fig. 5. Principle of the photoelectric imaging system for detecting image detail^[62]

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Table 1. Evaluation grades of smoke shielding effect

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Table 1. Evaluation grades of smoke shielding effect

Transmittance	Observation effect	Evaluation grade
$τ (λ)$ ≤5%	The target is indistinguishable from the background	Better
5%< $τ (λ)$ ≤20%	It is difficult to distinguish the target from the background	Good
20%< $τ (λ)$ ≤50%	The target is blurred and detectable	Poor
$τ (λ)$ >50%	The target is easily detectable	Worse

Table 2. Judgment rules under different cases

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Table 2. Judgment rules under different cases

Actual situation	Tracking accuracy of the electro-optical guidance system with known smoke interference $σ_{0}$		Tracking accuracy of electro-optical guidance system with unknown smoke interference $σ_{0}$
Judgment rule	$σ \leq 3 σ_{0}$	Invalid interference	$σ \leq R_{d}$	Invalid interference
	$σ > 3 σ_{0}$	Effective interference	$σ > R_{d}$	Effective interference
	Tracking failed	Effective interference	Tracking failed	Effective interference

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Liuying Chen, Xiaoxia Li, Xiaonong Wang, Bo Xie. Assessment Methods of Smoke Screening and Interference Effect[J]. Laser & Optoelectronics Progress, 2023, 60(22): 2200004

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Paper Information

Category: Reviews

Received: Feb. 27, 2023

Accepted: Apr. 3, 2023

Published Online: Nov. 3, 2023

The Author Email: Xiaoxia Li (lxxhong@163.com)

DOI:10.3788/LOP230725

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology