DOI: 10.17586/1023-5086-2019-86-07-35-41

Large-scale optical delay line design for axial parameter measurement of the eye

Zheng, Yin, Wang, Jinsong, Xiao, Zuojiang, Xu, Pengfei, Huang, Guolin

Publication in Journal of Optical Technology

For Russian citation (Opticheskii Zhurnal):

Yin Zheng, Jinsong Wang, Zuojiang Xiao, Pengfei Xu, Guolin Huang Large-scale optical delay line design for axial parameter measurement of the eye (Оптическая линия задержки с большим диапазоном для устройств измерения аксиальных характеристик глаза) [на англ. яз.] // Оптический журнал. 2019. Т. 86. № 7. С. 35–41. http://doi.org/10.17586/1023-5086-2019-86-07-35-41

Yin Zheng, Jinsong Wang, Zuojiang Xiao, Pengfei Xu, Guolin Huang Large-scale optical delay line design for axial parameter measurement of the eye (Оптическая линия задержки с большим диапазоном для устройств измерения аксиальных характеристик глаза) [in English] // Opticheskii Zhurnal. 2019. V. 86. № 7. P. 35–41. http://doi.org/10.17586/1023-5086-2019-86-07-35-41

For citation (Journal of Optical Technology):

Yin Zheng, Jinsong Wang, Zuojiang Xiao, Pengfei Xu, and Guolin Huang, "Large-scale optical delay line design for axial parameter measurement of the eye," Journal of Optical Technology. 86(7), 420-425 (2019). https://doi.org/10.1364/JOT.86.000420

Abstract:

The performance of an optical delay line is important for an accurate and wide-range measurement of axial parameters of a human eye, in particular in coherence tomography. In order to improve its performance, a rotating optical delay line device based on the equidifference fiber group is proposed by analyzing the optical path delay principle of the rotating mirror type delay line and the optical path multiplication principle of the equidifference fiber group. The delay distance formula is theoretically derived and a self-calibration method for optical path difference of fiber group is proposed. Finally, an experiment system was built to test and evaluate the characteristics of the delay distance, delay linearity and self-calibration repeatability for optical path difference of fiber group. The measurement results show that the maximum delay optical path is 128.094 mm, the delay linearity error is 0.17%. The repeatability is better than 0.036 mm. It can meet the requirements of human eye axial parameters for accurate and wide-range measurement.

Keywords:

optical delay line, optical path multiplication, delay distance, self-calibration, delay linearity

OCIS codes: 060.0060, 120.0120

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