Design of linear hyperchromatic lens in chromatic focal displacement sensor

Wenqing Jiang; Aijun Zeng; Huijie Huang

doi:10.1117/12.2574617

5 November 2020 Design of linear hyperchromatic lens in chromatic focal displacement sensor

Wenqing Jiang, Aijun Zeng, Huijie Huang

Proceedings Volume 11568, AOPC 2020: Optics Ultra Precision Manufacturing and Testing; 1156803 (2020) https://doi.org/10.1117/12.2574617
Event: Applied Optics and Photonics China (AOPC 2020), 2020, Beijing, China

Abstract

Chromatic confocal displacement sensor is one of non-contact displacement sensors based on optical wavelength displacement modulation. It is also a new photoelectric displacement sensor with high accuracy and stability which used to measure surface topography, distance, thickness and so on. In this paper, a hyperchromatic lens with the measurement range of 1mm is designed by using CODE V optical design software. The mentality of designing of hyperchromatic lens are researched according to the conditions of linear longitudinal chromatic aberration. Meanwhile the importance of image space numerical aperture (NA) and linearity of the longitudinal chromatic aberration to the sensor are clarified. In the final design of hyperchromatic lens, we realized the image space NA of 0.4436 and the linear regression coefficient R² of 0.991 taking into account both linear longitudinal chromatic aberration and image space NA.

Citation Download Citation

Wenqing Jiang, Aijun Zeng, and Huijie Huang "Design of linear hyperchromatic lens in chromatic focal displacement sensor", Proc. SPIE 11568, AOPC 2020: Optics Ultra Precision Manufacturing and Testing, 1156803 (5 November 2020); https://doi.org/10.1117/12.2574617

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