广东工业大学学报 ›› 2010, Vol. 27 ›› Issue (3): 1-4.

• 综合研究 •    下一篇

高吸收率非金属材料对CO2激光反射率的试验测定

  

  1. 广东工业大学机电工程学院,广东广州510006
  • 出版日期:2010-09-25 发布日期:2010-09-25
  • 作者简介:谢小柱(1975-),男,副教授,博士,主要研究方向为激光加工、精密加工技术
  • 基金资助:

    国家自然科学基金资助项目(50805207,50675038)

Reflectivity M easurement of Nonmetallic M aterials for C0,Lasers

  1. Faculty of Electromechanical Engineering,Guangdong University ofTechnology,Guangzhou 510006,China
  • Online:2010-09-25 Published:2010-09-25

摘要: 为了解释材料对激光的反射率和高吸收率非金属材料激光切缝形状形成的原因,采用量热法试验测定了模切板和有机玻璃对CO:激光的反射率.结果发现:1)垂直于入射面线偏振光的反射率随入射角增大而增大.2)平行于入射面线偏振激光的反射率在较小入射角下(60。以下),反射率较小且随入射角的增大而缓慢减小;入射角大于60。以后,反射率随入射角的增大而急剧增大.比较理论计算结果,发现两者具有较好的一致性.

关键词: 激光技术;反射率测定;高吸收率;非金属材料

Abstract: The die-board and PMMA reflectivity of CO2 laser were measured by the calorimetric method for the explanation how the kerf shape of laser cutting higher absorptive nonmetallic materials formed.The results indicate:1)that the reflectivity of perpendicular polarized beam will increase with the growth of the incident angle;2)that with the incident angle below 60 degrees the reflectivity of parallel polarized beam is small and it will diminish gradually with the growth of the incident angle while with the incident angle above 60 degrees the reflectivity will increase abruptly with further growth.The calculation results aye in accordance with the theoretical results.

Key words: laser technique;reflectivity measurement;higher absorptivity;nonmetallic material

[1]苏宝蓉,王哲恩,罗乃草,等.用于激光加工的金属表面土层的研究[J].激光,1981,9(8):532-536.

[2]Dreehsen H G,Hartwieh C,Schaefer J H,et a1.Measurement of the Optical Constants of A1 above the Melting Point at =10.6 m[J].Journal of Applied Physics,1984,56(1):238-240.

[3]Zhang Z,Modest M F.Temperature-Dependent Absorptances of Ceramics for Nd:YAG and CO2 Laser[j].ASME Journal of Heat Transfer,1998,120(2):322-327.

[4]蔺秀川,邵天敏.利用集总参数法测量材料对激光的吸收率[J].物理学报,2001,50(5):856-859.

[5]Kim T H,Chong K C,Yoo B Y,et a1.Calculation of CO2 Laser Beam Absorptance as a Function of Temperature for Steels by the Numerical Method『J 1.Journal of Materials Science,1995,30(3):784-792.
No related articles found!
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
No Suggested Reading articles found!