A Novel High-Resolution Optical Displacement Encoder Design Based on Double-Concave Lens

Yi Hua Fan; Ying Tsun Lee; Chun Yu Chen; Yi Lin Liao; Ching En Chen

doi:10.4028/www.scientific.net/KEM.447-448.579

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 447-448A Novel High-Resolution Optical Displacement...

A Novel High-Resolution Optical Displacement Encoder Design Based on Double-Concave Lens

Abstract:

A novel optical displacement encoder was proposed in this paper. An optical mechanism was designed by the equations of thick lens to change and modify the paths of light, and then to get a more visible position change in the optical detector to improve the measurement accuracy. The simulation results indicated that the optical mechanism with 5 mm stroke, which the lens radii of curvature of the incident and the exit surface on the lens were -0.625 cm and 1.25 cm, respectively, and the magnification was 50 times in imaging distance of 38 cm, could make the 1 nm movement intervals of light source to be about 50 nm movement intervals in the detecting surface. Thus we can combine the optical mechanism and a photo-detector array with 50 nm resolution and 25 cm total detecting length to form the optical displacement encoder with 1 nm measuring accuracy.

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Periodical:

Key Engineering Materials (Volumes 447-448)

Pages:

579-583

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.447-448.579

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Online since:

September 2010

Authors:

Yi Hua Fan, Ying Tsun Lee, Chun Yu Chen, Yi Lin Liao, Ching En Chen

Keywords:

Lens, Optical Encoder

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References

[1] J. Guild: Diffraction Gratings as Measuring Scales (Oxford University Press, England 1960).

Google Scholar

[2] M. Hercher and G. Wyntjes: Fine Measurement with Coarse Scale (1989).

Google Scholar

[3] T. Nishimura and K. Ishizuka: Laser Rotary Encoder (1986).

Google Scholar

[4] A.J. Durelli and V.J. Parks: Moire Analysis of Strain (1970).

Google Scholar

[5] K. Hane, T. Endo, Y. Ito and M. Sasaki: A Compact Optical Encoder with Micromachined Photodetector (2001).

Google Scholar

[6] W.F. Stephens and E.P. Mark, U.S. Patent 4, 949, 289. (1990).

Google Scholar

[7] N. Hagiwara, Y. Suzuki and H. Murase: A Method of Improving The Resolution and Accuracy of Rotary Encoder Using Code Compensation Technique (1992).

DOI: 10.1109/imtc.1991.161572

Google Scholar

[8] B. Hebert, M. Brule and L.A. Dessaint: A High Efficiency Interface for a Biphase Incremental Encoder with Error Detection (1993).

DOI: 10.1109/41.184832

Google Scholar