Acta Photonica Sinica, Volume. 49, Issue 8, 0822002(2020)
Optical System Design of Miniaturized Fundus Camera Based on Non-coaxial Array Illumination
Figures & Tables(20)
Fig. 1. Diagram of light path structure of traditional fundus camera
Fig. 2. Diagram of light path structure of fundus camera based on non-coaxial ring array illumination
Table 1. Design parameters of lighting system
View tableView in ArticleTable 1. Design parameters of lighting system
Parameter Value Wave band/nm 935~945 Divergence angle of light source /(°) 30 Pupil spot diameter range /mm 4~6 Working distance /mm 10 Fundus illumination height /mm 12 Tocal length of system/mm ≤20
Table 2. Multiple structural parameters of lighting subarray system
View tableView in ArticleTable 2. Multiple structural parameters of lighting subarray system
Operand Config1 Config2 Config3 Config4 Config5 Config6 CATX -15 -15 -15 -15 -15 -15 CADY -7.5 -7.5 -7.5 -7.5 -7.5 -7.5 CATZ 0 60 120 180 240 300
Table 3. Simulation data of fundus illumination uniformity
View tableView in ArticleTable 3. Simulation data of fundus illumination uniformity
Num samp Total power/W Max value/(W·mm-2) Min value/(W·mm-2) Average/(W·mm-2) Receiver 1 003 216 10.247 0.086 073 0.000 0 0.050 859
Table 4. Design parameters of imaging system
View tableView in ArticleTable 4. Design parameters of imaging system
Parameter Value Wave band /nm 935~945 Line field of view /mm ±5.24 Object resolution /μm 6 Pupil diameter/mm 2 Total length of system/mm ≤130 Distortion /% < 5 MTF value > 0.2@91 lp/mm
Table 5. Lens data of imaging system
View tableView in ArticleTable 5. Lens data of imaging system
No. Surface type Radius/mm Thickness/mm Material Refractive index Abbe number OBJ Standard 12.50 0.00 1 Standard 12.50 17.25 1.34 55.00 2 Even Asphere 5.67 4.00 1.42 55.00 3 Standard -10.48 0.00 STO Standard -10.10 3.00 1.34 55.00 5 Standard -3.63 0.60 1.38 55.00 6 Standard -6.89 29.99 7 Standard 64.70 5.22 H⁃K9L 1.52 64.21 8 Standard -32.01 1.00 9 Standard 20.73 5.41 H⁃K9L 1.52 64.21 10 Standard 214.43 31.60 11 Standard 27.25 1.92 H⁃LAK3 1.75 51.00 12 Standard -15.69 4.15 13 Standard -3.85 1.70 H⁃F2 1.61 37.00 14 Standard 19.69 1.00 15 Standard -17.19 2.11 H⁃LAK3 1.75 51.00 16 Standard -5.73 1.00 17 Standard 42.39 2.06 H⁃LAK3 1.75 51.00 18 Standard -12.96 18.00 19 Standard Infinity -0.07 IMA Standard Infinity 0.00
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Yan-xiong WU, Zhi-yuan GUO, Miao YU, Li-ping WANG. Optical System Design of Miniaturized Fundus Camera Based on Non-coaxial Array Illumination[J]. Acta Photonica Sinica, 2020, 49(8): 0822002
Paper Information
Category: Optical Design and Fabrication
Received: Feb. 28, 2020
Accepted: May. 19, 2020
Published Online: Nov. 27, 2020
The Author Email: WANG Li-ping (home313@126.com)
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