Mid-infrared High Energy Laser Beam Detector Array

Pengling, 杨鹏翎 Yang; Guobin, 冯国斌 Feng; Zhenbao, 王振宝 Wang; Bibo, 邵碧波 Shao; Lei, 张雷 Zhang; Gang, 冯刚 Feng; Yan, 闫燕 Yan; Junjie, 武俊杰 Wu; Qunshu, 王群书 Wang

doi:10.3788/cjl201138.0702008

Cited by 5 publications

(5 citation statements)

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“…Power value principle is an important principle in the laser measurement. The higher value can cause the saturation phenomenon [8] meanwhile the lower value can make poor sensitive detecting ability. So the principle of laser power in smoke testing must balance the relative relation of detection distance, laser attenuation in the environment of smoke loading, and self power value of laser implements [9].…”

Section: Threshold Of Power Value About Laser Implementsmentioning

confidence: 99%

Laser Array and Key Principles for Smoke Imaging Test

Lü

Wang

Tan³

2013

AMM

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The scene of single laser beam light is too small for the smoke field testing and the synchronization problem also unavoidable when it works at scanning way. In order to insure the measurement precision for the disturbance effect of smoke to imaging detectors, it introduces the design and key principles of lasers array with multi small power same semiconductor laser after beam homogeneous enlarge shaping. It can measure 3.5m×3.5m smoke area which can full of scene of CCD (10o×10o) at 20m distance in the field testing smoke with 3×3 beam homogenous enlarge shaping laser array.

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Section: Threshold Of Power Value About Laser Implementsmentioning

confidence: 99%

Laser Array and Key Principles for Smoke Imaging Test

Lü

Wang

Tan³

2013

AMM

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“…The photoelectric method is characterized by sensitive response, high time resolution [2] . However, restricted by size of optically sensitive area, low saturation threshold and damage threshold, the photoelectric method brings large uncertainty in high energy measurements.…”

Section: Introductionmentioning

confidence: 99%

A compound detector array for the measurement of large area laser beam intensity distribution

Wang¹,

Xie²,

Ji³

et al. 2013

SPIE Proceedings

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A synthesis of the calorimetric and photoelectric method on the high energy laser beams measurement is presented. Data fusion of the two kinds of detector units is achieved with real-time scaling onsite. A set of compound diagnostic system is developed for the large area laser beam intensity distribution measurement, which is mainly composed of 256 calorimetric detectors, 120 photoelectric detectors, multi-channel data sampling module and one central processing computer. The total energy of the laser beam is accurately measured with calorimetric detectors, and the spatial intensity distribution with high temporal resolution is given by the photoelectric detectors. With the merits of energy accuracy and the temporal resolution based on the two kinds of detector units, the compound diagnostic system can be used to measure accurately the far-field temporal and spatial distribution of high energy laser beams.

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“…There are several methods to measure the laser beam profile, e.g. mechanical scanning method [1], ablation observation [2], array detection method [3][4][5][6][7] and the CCD imaging method. The CCD imaging method is widely used owing to the advantages of high spatial resolution, easy operation and low cost.…”

Section: Introductionmentioning

confidence: 99%

Research on the measurement method for a large laser beam profile based on CCD diffuse transmission imaging

Pang¹,

Rong²,

Yuan³

et al. 2013

Meas. Sci. Technol.

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The intensity distribution of a laser beam (laser beam profile) is one of its most important characteristics because it yields information on the non-uniformity, centroid, centroid jitter and beam quality. A novel measurement method for obtaining a large laser beam intensity distribution based on CCD diffuse transmission imaging is proposed. The measurement principle is presented. The measurement components of the system have been designed. The layout of the system and the design of a diffuse transmission sampling target are emphasized. The methods of correcting geometric and intensity distortion of the spot are described in detail. The method to calibrate the power coefficient is also given. After the laser spot correction, we can obtain the precise laser beam intensity profile as well as the laser power. The presented test results validate the method. In the measurement field of large laser beams, the method can measure the profile with a non-uniformity of less than 1%, and laser power within 2% error compared with the calibration power meter. The measurement system can be used as a standard measurement instrument after being calibrated when manufactured.

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Mid-infrared High Energy Laser Beam Detector Array

Cited by 5 publications

References 0 publications

Laser Array and Key Principles for Smoke Imaging Test

Laser Array and Key Principles for Smoke Imaging Test

A compound detector array for the measurement of large area laser beam intensity distribution

Research on the measurement method for a large laser beam profile based on CCD diffuse transmission imaging

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