Advertisement

Research on Lens Design for LED Source of Microscopic Measuring System

  • Qiaofen ZhangEmail author
  • Huaizhong Li
  • Liming Wu
  • Jian Gao
  • Guitang Wang
  • Yaohua Deng
Conference paper
Part of the Smart Innovation, Systems and Technologies book series (SIST, volume 130)

Abstract

Illuminance uniformity and illuminating efficiency are always the key problems of Light Emitting Diode (LED) lighting system design. This study focuses on designing a suitable aspherical surface to create a rectangular and uniform illumination by studying the influence of optical aspheric parameters for a 3D microscopic measurement system. The 3D microscopic measurement system is constructed based on Scheimpflug condition. Then the optical design of LED source to obtain a rectangular-shaped illumination pattern on the DMD chip is simulated and optimized by optical tracing simulation software (TracePro). Our research focuses on the design of the second surface, where the key point of the design is to find appropriate conic constant K2 and the paraxial radius of curvature R2 of the lens, while the first surface of lens is considered as a plane. The conic constant K2 is researched by using the normal equation for conic aspheric and is discussed respectively when the conicoid is parabolic, elliptic and hyperboloidal. The result indicates that paraboloid can get a better uniform rectangular illumination within region than ellipsoid and hyperboloid. The illumination uniformity of the predetermined illumination area on the DMD chip reaches 86.83%.

Keywords

Scheimpflug condition Illuminance uniformity Conic constant Paraxial radius of curvature Rectangular illumination 

Notes

Acknowledgement

This work was supported by National Natural Science Foundation of China (No. 61705045, No. U1601202, No. 51675106), Guangdong Provincial Science and Technology Research Project (No. 2015B010104008, No. 2016A030308016, No. 17ZK0091), Foundation of Guangdong Province Science and Technology (No. 2017A090905047), Special and Technology Enterprises of Provincial Science and Technology Enterprises of Small and Medium sized (No. 2016A010119143), Foundation of Guangdong Province Science and Technology (No. 201604010011).

References

  1. 1.
    Hung, C.-C., Fang, Y.-C., Tsai, C.-M., Lin, C.-C., et al.: Optical design of high performance con-focal microscopy with digital micro-mirror and stray light filters. Optik 121, 2073–2079 (2010)CrossRefGoogle Scholar
  2. 2.
    Apedo, K.L., Munzer, C., He, H., Montgomery, P., Serres, N., Fond, C., Feugeas, F.: Cement paste surface roughness analysis using coherence scanning interferometry and confocal microscopy. Mater. Charact. 100, 108–119 (2015)CrossRefGoogle Scholar
  3. 3.
    Paul Kumar, U., Bhaduri, B., Kothiyal, M.P., Krishna Mohan, N.: Two-wavelength micro-interferometry for 3-D surface profiling. Opt. Lasers Eng. 47, 223–229 (2009)CrossRefGoogle Scholar
  4. 4.
    Paul Kumar, U., Haifeng, W., Krishna Mohan, N., Kothiyal, M.P.: White light interferometry for surface profiling with a color CCD. Opt. Lasers Eng. 50, 1084–1088 (2012)CrossRefGoogle Scholar
  5. 5.
    Yin, Y., Wang, M., Gao, B.Z., Liu, X., Peng, X.: Fringe projection 3D microscopy with the general imaging model. Opt. Express 23, 6846–6857 (2015)CrossRefGoogle Scholar
  6. 6.
    Li, D., Tian, J.: An accurate calibration method for a camera with telecentric lenses. Opt. Lasers Eng. 51, 538–541 (2013)CrossRefGoogle Scholar
  7. 7.
    Mei, Q., Gao, J., Lin, H., Chen, Y., Yunbo, H., Wang, W., Zhang, G., Chen, X.: Structure light telecentric stereoscopic vision 3D measurement system based on Scheimpflug condition. Opt. Lasers Eng. 86, 83–91 (2016)CrossRefGoogle Scholar
  8. 8.
    Zhang, Q., Gao, J.: Simulation and optimization of lens design for single light emitting diode. Sens. Lett. 11, 342–347 (2013)CrossRefGoogle Scholar
  9. 9.
    Zhang, Q., Gao, J., Chen, X.: Simulation and optimization of reflection optical module design for single LED. Opt. Quant. Electron. 45, 1179–1188 (2013)CrossRefGoogle Scholar
  10. 10.
    Zhang, Q., Gao, J., Chen, X.: Influence of optical aspheric parameters on obtaining uniform rectangular illumination. Optik 125, 2577–2581 (2014)CrossRefGoogle Scholar
  11. 11.
    Luo, Y., Feng, Z., Han, Y., Li, H.: Design of compact and smooth free-form optical system with uniform illuminance for LED source. Opt. Express 18, 9055–9063 (2010)CrossRefGoogle Scholar
  12. 12.
    Ding, Y., Liu, X., Zheng, Z.R., Gu, P.F.: Freeform LED lens for uniform illumination. Opt. Express 16, 12958–12966 (2008)CrossRefGoogle Scholar
  13. 13.
  14. 14.
    Smith, W.J: Modem Optical Engineering. Printed and bound by R Donnel1ey & Sons Company, USA, 312 (2000)Google Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Key Laboratory of Precision Microelectronic Manufacturing Technology & Equipment of Ministry of Education of Guangdong University of TechnologyGuangzhouChina
  2. 2.Griffith School of EngineeringGold Coast Campus, Griffith UniversitySouthportAustralia

Personalised recommendations