Optical system design of binocular pupil detector based onnear infrared telecentric lens

Liu Zhiying; Gao Zhishan; Fu Weiwei; Yuan Qun

doi:10.5768/JAO201738.0306003

Journal of Applied Optics > 2017 > 38(3): 485-493. > DOI: 10.5768/JAO201738.0306003

Liu Zhiying, Gao Zhishan, Fu Weiwei, Yuan Qun. Optical system design of binocular pupil detector based onnear infrared telecentric lens[J]. Journal of Applied Optics, 2017, 38(3): 485-493. DOI: 10.5768/JAO201738.0306003

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Optical system design of binocular pupil detector based onnear infrared telecentric lens

1.
Institute of Electrical Engineering and Photoelectric Technology, Nanjing University of Science and Technology, Nanjing 210000, China
2.
Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou 215009, China

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Received Date: October 27, 2016
Revised Date: December 20, 2016

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Abstract

Abstract

In order to reduce sensitivity of binocular pupil detection system to the pupil position, a binocular pupil detector based on near-infrared telecentric lens is designed. Calculation process of optical parameters of near-infrared telecentric lens is described. Telecentric lens is designed and optimized in different parts with Zemax.Tolerance is analyzed by MTF, maximum distortion of the whole field and object telecentricity. Finally, standard circle is used to calibrate the instrument to find out fitting correspondence between number of pixels and pupil size. Results show that pupil diameter measurement accuracy reaches 0.05 mm for interpupillary distance of 55 mm to 75 mm, which can meet the requirements.
- optical design,
- pupil detection,
- tolerance analysis,
- system calibration

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References

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Optical system design of binocular pupil detector based onnear infrared telecentric lens