Chinese Optics, Volume. 18, Issue 4, 879(2025)
Design of visual optical system based on Varifocal zoom structure
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Fig. 2. Alvarez lens zoom principle. (a) Parallel glass plate; (b) convex lens; (c) concave lens
Table 1. Parameters and indicators of continuous zoom optical system
View tableView in ArticleTable 1. Parameters and indicators of continuous zoom optical system
Parameter Value Wavelength/nm 486~656 Full field of view /(°) 15 Entrance pupil diameter/mm 4 Focal power variation +4D~−8D Distortion/% <2% MTF 30line pairs >0.3
Table 2. Basic parameters of continuous zoom optical system
View tableView in ArticleTable 2. Basic parameters of continuous zoom optical system
Type A Radius Thickness Material Standard - 无限 3 APL5014CL XY polynomial − 0.0006 −3.940E-09 1 XY polynomial − 0.0006 −3.940E-09 3 APL5014CL Standard - 无限 12 Standard （角膜） - 6.896 0.6 Nd:1.377 Vd:55 Standard (液状体） - 3.365 3 Nd:1.335 Vd:55 Standard（stop） （瞳孔） - 10.100 0 Standard （晶状体） - 10.485 4 Nd:1.405 Vd:55 Even Aspheric （玻璃体） - −5.673 17.25 Nd:1.335 Vd:55 Standard （视网膜） −12.5 0
Table 3. XY polynomial free-form surface coefficients
View tableView in ArticleTable 3. XY polynomial free-form surface coefficients
Coefficient Value X3 2.11×10−4 XY2 6.31×10−4 X2 2.01×10−5 Y2 1.38×10−6 X 3.48×10−5
Table 4. System tolerance settings
View tableView in ArticleTable 4. System tolerance settings
Type Operator Item Target Index tolerances TIND Index 0.0005 TABB Abbe 0.3 Surface tolerances TIRR Irregularity 0.5 TFRN Radius/fringe 3 TTHI Thickness/mm 0.002 TSDX(Y) Decenter/mm 0.02 TSTX(Y) Tilt/° 0.0167 Element tolerances TEDX(Y) Decenter/mm 0.015 TETX(Y) Tilt/° 0.0167
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Shen-bao HU, Jing ZHANG, Gong ZHANG, Jun-ming ZHANG, Yan ZHANG. Design of visual optical system based on Varifocal zoom structure[J]. Chinese Optics, 2025, 18(4): 879
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Received: Sep. 29, 2024
Accepted: Feb. 25, 2025
Published Online: Aug. 13, 2025
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