Acta Optica Sinica, Volume. 43, Issue 20, 2022001(2023)
Wide Field-of-View Axial Dispersion Lens with Adjustable Performance Parameters
Figures & Tables(29)
Fig. 3. Axial dispersion lens optical path. (a) Installation position of the first type of splitting prism; (b) installation position of the second type of splitting prism
Fig. 14. Axial dispersion lens. (a) Optical and mechanical structure profile; (b) physical object of lenses
Fig. 15. Interference detection. (a) Experimental setup; (b) results of interference detection in the center field-of-view of the first type of axial dispersion lens
Fig. 16. Dispersion diagram of white light emitted from small hole through optical module in imaging spectrometer
Fig. 18. Snapshot type chromatic confocal calibration experiment. (a) Material object; (b) principle
Fig. 20. System measurement error. (a) First type of performance parameter; (b) second type of performance parameter
Fig. 22. Axial resolution test results. (a) First type of performance parameter; (b) second type of performance parameter
Table 1. Parameters of three pieces of axial dispersion lens
View tableTable 1. Parameters of three pieces of axial dispersion lens
Lens Front surface curvature radius/mm Rear surface curvature radius/mm Glass material Lens 1 23.273 -273.143 H-LAF10LA Lens 2 -53.155 16.864 H-F4 Lens 3 49.590 -10500 H-ZLAF92
Table 2. Two types of performance parameters of dispersion lenses
View tableTable 2. Two types of performance parameters of dispersion lenses
Performance index First type of dispersion lens Second type of dispersion lens Wavelength /nm 450-700 450-700 Object height /mm 9 9 F number 4 1.2 Vertical axis magnification -1 -0.3 Image height /mm 9 2.7 Axial chromatic aberration /mm 4.06 1.21
Table 3. Axial dispersion lens wavefront detection result
View tableTable 3. Axial dispersion lens wavefront detection result
Wavefront First type of axial dispersion lens Second type of axial dispersion lens Centre field-of-view Edge field-of-view Centre field-of-view Edge field-of-view RMS 0.053λ 0.075λ 0.061λ 0.078λ PV 0.371λ 0.440λ 0.415λ 0.463λ
Table 4. Spot diameter detection result
View tableTable 4. Spot diameter detection result
Center wavelength /nm Spot diameter /μm First type of axial dispersion lens Second type of axial dispersion lens 460 20.53 7.14 650 20.20 7.22
Table 5. Standard deviation and average absolute error measured by snapshot chromatic confocal measurement system
View tableTable 5. Standard deviation and average absolute error measured by snapshot chromatic confocal measurement system
Parameter Centre field-of-view Edge field-of-view 450 nm 575 nm 700 nm 450 nm 575 nm 700 nm First performance parameter Standard deviation /μm 1.778 2.234 1.999 1.625 2.965 2.339 Average absolute error /μm 1.377 1.756 1.637 1.210 2.466 1.865 Second performance parameter Standard deviation /μm 0.747 0.747 0.599 0.739 0.856 0.714 Average absolute error /μm 0.590 0.611 0.476 0.790 0.763 0.567
Table 6. Two performance parameters of snapshot chromatic confocal measurement system
View tableTable 6. Two performance parameters of snapshot chromatic confocal measurement system
Parameter First performance parameter Second performance parameter Axial measurement range /mm 4.013 1.193 Horizontal detection area /（mm×mm） 14×10 4.2×3 Axial resolution /μm < 4 < 1 Area array sampling resolution /μm 100 30 Spot diameter /μm 20.53 7.22 Maximum measurement standard deviation /μm 2.965 0.856 Maximum average absolute error /μm 2.466 0.79
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Haodong Bai, Yang Zhao, Jiankang Zhou, Jiacheng Zhu, Weimin Shen. Wide Field-of-View Axial Dispersion Lens with Adjustable Performance Parameters[J]. Acta Optica Sinica, 2023, 43(20): 2022001
Paper Information
Category: Optical Design and Fabrication
Received: Apr. 19, 2023
Accepted: May. 29, 2023
Published Online: Oct. 13, 2023
The Author Email: Zhou Jiankang (health@suda.edu.cn)
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