Infrared and Laser Engineering, Volume. 51, Issue 8, 20210789(2022)
Development of metrology and calibration devices for ophthalmic OCT equipment based on 3D printing technology
Figures & Tables(11)
Fig. 1. (a) Beam path diagram of eye model; (b) MTF curves of 0°-8° FOV
Fig. 2. 3D resolution board: (a) Plane top view, (b) equiaxial side 3D-simulation view and (c) imaging by OCT device
Fig. 3. Designed eye model: (a) Sectional view of mechanical structure, (b) top view of real device and (c) assembling drawing
Fig. 4. Tracing results for 3D resolution board of line width and height: (a) Line pairs for transverse resolution; (b) Line pairs for axial resolution
Fig. 5. Test results for image matching: (a)
Fig. 6. Test results for lateral resolution and its scanning location diagram: (a) Horizontal No. 1-6 line pairs; (b) Vertical No. 4 line pair; (c) Vertical No. 5 line pair; (d) Grey-scale map of vertical No. 4 line pair; (e) Grey-scale map of vertical No. 5 line pair
Fig. 7. Resolution steps: (a) Test results for axial resolution and its scanning location diagram, (b) binary fitting image and (c) height in pixel
Fig. 8. Test results for FOV: (a) Sectional view of model eye and (b) scanning image of OCT equipment
Fig. 9. Results for depth measurement: (a) Scanning image of OCT equipment and (b) image after data processing
Table 1. Main parameters of designed eye model
View tableView in ArticleTable 1. Main parameters of designed eye model
Eyeball tissue Parameters Radius of curvature Thickness Refractive index Anterior surface of cornea 7.60 0.50 1.526 Posterior surface of cornea 4.90 Anterior chamber - 2.41 1.333 Anterior surface of lens 10.46 4.50 1.526 Posterior surface of lens −12.73 Vitreous - 17.63 1.333 Retina −12.50 - -
Table 2. Tracing results of FOV of model eye
View tableView in ArticleTable 2. Tracing results of FOV of model eye
Concentric rings ID Nominal diameter/ mm Test results/ mm Nominal FOV/ （°） Test results/ （°） 1 12 12.255 60 61.41 2 13.77 13.834 70 70.40 3 15.43 15.499 80 80.45 4 16.97 17.035 90 90.44 5 18.39 18.468 100 100.62 6 19.66 19.543 110 109.03
Tools
Get Citation
Copy Citation Text
Liangcheng Duan, Wenli Liu, Xiaowen Qin, Tao Cui, Xiuyu Li, Junbang Zhao, Xiang Ma, Zhixiong Hu. Development of metrology and calibration devices for ophthalmic OCT equipment based on 3D printing technology[J]. Infrared and Laser Engineering, 2022, 51(8): 20210789
Paper Information
Category: Phtotoelectric measurement
Received: Oct. 28, 2021
Accepted: --
Published Online: Jan. 9, 2023
The Author Email: Hu Zhixiong (huzhixong@nim.ac.cn)
© Copyright 2018-2021 | Chinese Laser Press.
All Rights Reserved 沪ICP备15018463号-20