Study and Fabrication of Filter Film in Laser Identification Between Friend or Foe System

Yongliang, 杨永亮 Yang; Guojun, 刘国军 Liu; Xiuhua, 付秀华 Fu; Meixuan, 李美萱 Li

doi:10.3788/aos201232.0131002

Cited by 2 publications

(2 citation statements)

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“…Both MgF 2 and SiO 2 as the material of low refractive index match with H 4 . MgF 2 is still used as the lowest refractive index material, but when the thickness of the monolayer film is more than 2µm, the high tensile stress of the material will lead to the phenomenon of film stripping [8] . Choose SiO 2 as the material of low refractive index by overall consideration.…”

Section: Choosing Materialsmentioning

confidence: 99%

Design and Deposition of Infrared Antireflection Protection Film on Magnesium Fluoride Substrate for 3~5 μm

Wang

et al. 2014

KEM

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The infrared antireflection protection film is designed and deposited on magnesium fluoride substrate for 3~5 μm. The multilayer antireflection film is designed and prepared by ion beam assisted electron-beam deposition. After repeated experiments, the absorption peak of SiO2 is found at 3000nm,using MgF2 and SiO2 as the low-index materials to reduce the absorption. The coating structure is Sub|1.46H1.37L2.19H1.45L2.49M|Air. DLC (diamond-like carbon) protection coating is deposited by radio frequency plasma enhanced chemical vapor deposition (RF-PECVD). Through contrast tests, the best deposition process is obtained (the butane flow rate is 5sccm/s, deposition temperature is 80°C) by setting deposition time as invariant, the reaction gas flow rate and deposition temperature as variables. Meanwhile the problem of associativity between antireflection film and DLC protection coating is solved by adding a Si transition layer. The result shows that the average transmittance of this film in 3~5μm is 95.5%, and this film can withstands harsh environment tests. Key words: Magnesium fluoride substrate; Antireflection protection film; 3~5 μm infrared band Document Code: A Article ID: DIO

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Section: Choosing Materialsmentioning

confidence: 99%

Design and Deposition of Infrared Antireflection Protection Film on Magnesium Fluoride Substrate for 3~5 μm

Wang

et al. 2014

KEM

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“…But the receiver of the laser tracking system was easily to be affected by interference signal and background light, the wavelength at 532nm, 632nm, 808nm, 905nm, 1064nm and 1550nm were commonly used laser wavelength. Therefore, the filter [1,2] was developed to meet the requirements for the laser tracking system that had great significance for improving the laser protection ability of the laser receiving system and the anti-interference ability of the detector.…”

Section: Introductionmentioning

confidence: 99%

Research on Preparation Band-Pass Filter by Lon Beam Sputtering

Tang

Liu

2013

KEM

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According to the requirement of the filter for laser tracking system, we chose Ta as the target material of high refractive index and SiO2 as the target material of low refractive index, the film system was designed and optimized with the TFCalc software, adopted the double ion sputter coaters by VEECO company for plating system, using two sides of the substrate to broaden the long and short wavelength cut-off band respectively, we improved the peak transmittance and simplified the difficulty of experimental analysis, the filter to meet the demand has been deposited. The average transmittance of the filter at 532nm, 808nm, 1064nm and1550nm wavelength was less than 0.2% and the peak transmittance at 905nm wavelength was 96.3%. The filter can withstand the test of bad environment and satisfy the requirements of the laser tracking system.

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Study and Fabrication of Filter Film in Laser Identification Between Friend or Foe System

Cited by 2 publications

References 0 publications

Design and Deposition of Infrared Antireflection Protection Film on Magnesium Fluoride Substrate for 3~5 μm

Design and Deposition of Infrared Antireflection Protection Film on Magnesium Fluoride Substrate for 3~5 μm

Research on Preparation Band-Pass Filter by Lon Beam Sputtering

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