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24 November 2023 Design and comparison of dispersion lens for spectral confocal displacement sensor
Hongwei Yang, Lidong Lv, Zhile Chen
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Proceedings Volume 12935, Fourteenth International Conference on Information Optics and Photonics (CIOP 2023); 129351W (2023) https://doi.org/10.1117/12.3007337
Event: Fourteenth International Conference on Information Optics and Photonics (CIOP 2023), 2023, Xi’an, China
Abstract
Aiming to optimiziong axial chromatic aberration, this paper designed and compared three different dispersion lens configurations for spectral confocal displacement sensor. The designed three-piece dispersion lens exhibited a dispersion range of 6.706 mm, a linear fitting error of 50 nm, and a diffraction limit of 739 μm. The designed four-piece dispersion lens ultilized a dispersion range of 0.992 mm, a linear fitting error of 12 nm, and a diffraction limit of 30 μm. The designed five-piece dispersion lens yielded a dispersion range of 2.174 mm, a linear fitting error of 30 nm, and a diffraction limit of 69 μm. In summary, three-piece lens offered the largest detection range and a smaller linear fitting error. On the other hand, the four-piece lens exhibited the smallest dispersion range, while the fitting error and the diffraction limit were boasted the smallest to that of the three-piece lens. In terms of convenience of assembly and machining, the three-piece lens was superior, with identical glass types that facilitated easier processing and higher cost performance. However, for a balance between resolution and dispersion range, the five-piece dispersion lens should be the better choice.
(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Hongwei Yang, Lidong Lv, and Zhile Chen "Design and comparison of dispersion lens for spectral confocal displacement sensor", Proc. SPIE 12935, Fourteenth International Conference on Information Optics and Photonics (CIOP 2023), 129351W (24 November 2023); https://doi.org/10.1117/12.3007337
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KEYWORDS
Diffraction limit
Lens design
Confocal microscopy
Sensors
Chromatic aberrations
Object detection
Spectroscopy
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