[1] Chunkan T. Design of zoom system by the varifocal differential equation. I[J]. Applied Optics, 31, 2265-2273(1992).

[2] Youngworth R N, Betensky E I. Fundamental considerations for zoom lens design (tutorial)[J]. Proceedings of SPIE, 8488, 848806(2012).

[3] Tao C K. Varifocal differential equation theory of zoom lenses[J]. Proceedings of SPIE, 2539, 168-179(1995). http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=1005307

[4] Back F G, Lowen H. Generalized theory of zoomar systems[J]. Journal of the Optical Society of America, 48, 149-153(1958). http://www.opticsinfobase.org/abstract.cfm?id=76553

[5] Yu D Y, Tan H Y[M]. Engineering optics, 164-171(2015).

[6] Xu Z G, Liang L S. Research of OZSAD system assistant design software[J]. Optical Technique, 31, 235-237, 240(2005).

[7] Liang L S. A rapid computing method of zoom optical design[J]. Journal of Applied Optics, 25, 17-20(2004).

[8] Wang L C, Wen H R, Luo B. Design of high-magnification zoom stereo microscope[J]. Aviation Precision Manufacturing Technology, 25, 15-20(1989).

[9] Wang Z J[M]. Practical manual optical technology, 416-464(2006).

[10] Bergstein L. General theory of optically compensated varifocal systems[J]. Journal of the Optical Society of America, 48, 154-171(1958). http://www.opticsinfobase.org/abstract.cfm?uri=josa-48-3-154

[11] Bergstein L, Motz L. Two-component optically compensated varifocal system[J]. Journal of the Optical Society of America, 52, 353-362(1962). http://dx.doi.org/10.1364/josa.52.000353

[12] Bergstein L, Motz L. Three-component optically compensated varifocal system[J]. Journal of the Optical Society of America, 52, 363-375(1962).

[13] Bergstein L, Motz L. Four-component optically compensated varifocal system[J]. Journal of the Optical Society of America, 52, 376-388(1962).

[14] Tanaka K. Paraxial analysis of mechanically compensated zoom lenses. 1:four-component type[J]. Applied Optics, 21, 2174-2183(1982).

[15] Tanaka K. Paraxial analysis of mechanically compensated zoom lenses. 2: generalization of Yamaji type V[J]. Applied Optics, 21, 4045-4053(1982).

[16] Tanaka K. Paraxial analysis of mechanically compensated zoom lenses. 3: five-component type[J]. Applied Optics, 22, 541-553(1983).

[17] Yang M Y. Study of high ratio continuous zoom system[D]. Beijing: University of Chinese Academy of Sciences, 15-31(2017).

[18] Yao D S. Design method of mechanically compensated three-element continuous zoom optical system(1)[J]. Journal of Applied Optics, 29, 165-170(2008).

[19] Yao D S. Design method of mechanically compensated three-element continuous zoom optical system(2)[J]. Journal of Applied Optics, 29, 321-326(2008).

[20] Yao D S. Design method of mechanically compensated three-element continuous zoom optical system(3)[J]. Journal of Applied Optics, 29, 481-486(2008).

[21] Pal S, Hazra L. Structural design of mechanically compensated zoom lenses by evolutionary programming[J]. Optical Engineering, 51, 063001(2012). http://spie.org/x648.html?product_id=981822

[22] Li H Z, Zhang Z D. Design of 20 ×double-linkage continuous zoom optical system[J]. Acta Optica Sinica, 35, 0222003(2015).

[23] Wang N X, Jiao M Y, Jiang X B et al. Calculation of initial configuration for 15 × double-linkage infrared continuous zoom system[J]. Journal of Applied Optics, 33, 670-674(2012).

[24] Yao D S, Wang N X, Kang W L. Method of designing linearization double-linkage continuous zoom lens[J]. Journal of Applied Optics, 36, 1-8(2015).

[25] Tao C K[M]. Design of zoom system, 1-7(1988).

[26] Wang X Y, Liu W L. Optical design of telephoto zoom lens[J]. Journal of Applied Optics, 38, 277-280(2017).

[27] Xu L F, Zhang X, Cai W et al. Optical design of high-magnification zoom systems with multiple moving lens groups[J]. Infrared and Laser Engineering, 42, 1748-1753(2013).

[28] He H X. Medium wave infrared optical system based on three group linkage continuous zoom[J]. Laser & Optoelectronics Progress, 56, 190801(2019).

[29] Wang L, Jiang H, Sun L L[J]. A review of the development of microscope Science & Technology Information, 2009, 117-118, 133.

[30] Zeng C M. The optical design of zoom stereomicroscope using optical compensation[J]. Optical Instruments, 23, 20-24(2001).

[31] Xu L F, Zhang X, Qu H M et al. Optical design of high-magnification zoom stereo microscope objective[J]. Journal of Applied Optics, 34, 38-44(2013).

[32] Yu F H, Shi J. A zoom electronic eyepiece adapter for a finite conjugate distance microscope. CN201921362086.7[P](2019).

[33] Li Y Y, Chen H, Wang Y Y et al. Continuous zoom optical system for E-vision aid device[J]. Acta Optica Sinica, 30, 2387-2392(2010).

[34] Chen Y T. Optical design of three-in-one zoom digital microscope system[D]. Hangzhou: Zhejiang University, 72-76(2015).

[35] Huang Y P, Lin F, Huang S Y et al. Design of front objective for digital slit-lamp microscope system[J]. Laser & Optoelectronics Progress, 57, 152202(2020).

[36] Xu R Q, Kong M M, Zhang H C et al. Experimental research on reducing zoom time of electrowetting liquid lenses[J]. Acta Optica Sinica, 40, 1322003(2020).

[37] Lü H Y, Cui J G. Dielectrophoresis liquid lens based on frequency modulation[J]. Laser & Optoelectronics Progress, 56, 132201(2019).

[38] Blum M, Büeler M, Grätzel C et al. Compact optical design solutions using focus tunable lenses[J]. Proceedings of SPIE, 8167, 81670W(2011). http://spie.org/x648.html?product_id=897608