Optical design and applications of endoscopic optical coherence tomography probe with large field of view

Haoyang Yu; Jinyuan Hu; Jingye Gu; Sujian Wu; Jinyu Fan; Yi He; Guohua Shi

doi:10.12086/oee.2025.250049

Opto-Electronic Engineering, Volume. 52, Issue 6, 250049(2025)

Optical design and applications of endoscopic optical coherence tomography probe with large field of view

Haoyang Yu^1,2, Jinyuan Hu^1,2, Jingye Gu^1,2, Sujian Wu^1,2, Jinyu Fan^1,2, Yi He^1,2, and Guohua Shi^1,2、*

Author Affiliations

¹School of Biomedical Engineering, University of Science and Technology of China, Suzhou, Jiangsu 215163, China

²Jiangsu Key Laboratory of Medical Optics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, Jiangsu 215163, China

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Figures & Tables(12)

Fig. 1. Structure diagram of optical system

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Fig. 2. Optimize performance results. (a) Curves of optical transfer function; (b) Curves of optical transfer function after system inversion; (c) Distortion

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Fig. 3. Schematic diagram of the endoscopic swept source optical coherence tomography system

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Fig. 4. Structure of endoscopic probe

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Fig. 5. Physical diagram of endoscopic probe

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Fig. 6. Infrared detection card image captured by endoscope probe

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$Tape images in various forms taken by endoscope probe. (a) Tape image taken by large field of view endoscopic probe; (b) Tape image taken by gradient refractive index lens endoscopic probe; (c) Deep fracture; (d) Shallow fracture$

Fig. 7. Tape images in various forms taken by endoscope probe. (a) Tape image taken by large field of view endoscopic probe; (b) Tape image taken by gradient refractive index lens endoscopic probe; (c) Deep fracture; (d) Shallow fracture

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Fig. 8. Endoscopic probe image of finger

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Fig. 9. Endoscopic probe images of isolated porcine eyes. (a) Iris; (b) Sclera; (c) Retina

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Table 1. Endoscopic objective lens design specifications
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Table 1. Endoscopic objective lens design specifications
Design parameter Data
Working wavelength/nm 1000~1100
Field of view/mm 6
Working length/mm ＜10
F 3.6
Diameter/mm 1.6
MTF ＞0.3@120 lp/mm

Table 2. Tolerance data

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Table 2. Tolerance data

Item	Value
Radius/fringe	±1.0
Thickness/mm	±0.02
Surface tilt (X and Y)/(°)	±0.016
Surface decenter (X and Y)/mm	±0.01
Element tilt (X and Y)/(°)	±0.050
Element decenter (X and Y)/mm	±0.01
S+A irregularity/fringe	±0.2
Refractive index	±0.0005
Abbe number/%	±0.5

Table 3. Results of tolerance analysis

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Table 3. Results of tolerance analysis

Item	MTF value	0.00 mm	0.13 mm	0.22 mm	0.30 mm	0.44 mm
＞90%	0.22605968	0.26229763	0.23584785	0.23000939	0.18773194	0.17901241
＞80%	0.28598701	0.32211225	0.29040474	0.29626769	0.24366894	0.25094786
＞50%	0.38442667	0.41492560	0.39079730	0.38774571	0.35524171	0.35156355
＞20%	0.45718626	0.48368073	0.45900375	0.45988423	0.42865650	0.42745950
＞10%	0.48369566	0.50958785	0.48749136	0.48548072	0.46176084	0.45997851

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Haoyang Yu, Jinyuan Hu, Jingye Gu, Sujian Wu, Jinyu Fan, Yi He, Guohua Shi. Optical design and applications of endoscopic optical coherence tomography probe with large field of view[J]. Opto-Electronic Engineering, 2025, 52(6): 250049

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