[1] Lan G P, Wang X, Liang W et al. Optical design and thermal analysis for the active-focusing aerial camera objective[J]. Acta Optica Sinica, 32, 0322006(2012).

[2] Meng F H. Study on the application of autofocus technique based on image processing technology in aerial camera[D]. Changchun: University of Chinese Academy of Sciences, 11-18(2016).

[3] Hui S W. Compensation for long focus oblique real-time aerial camera being out of focus[J]. Optics and Precision Engineering, 11, 162-165(2003).

[4] Stites D G. Automatic focus sensing and control of optical reconnaissance sensors[J]. Proceedings of SPIE, 79, 57-71(1976).

[5] Jutamulia S, Asakura T, Bahuguna R D et al. Autofocusing based on power-spectra analysis[J]. Applied Optics, 33, 6210-6212(1994).

[6] Ren S G, Li J W, Xie L L. Automatic focusing technique based on gray scale difference method[J]. Opto-Electronic Engineering, 30, 53-55(2003).

[7] Xu Z L, Zhao Y L, Zhang G D. Design of an auto-focusing system for a new type of aerial camera[J]. Electronics Optics & Control, 18, 77-80(2011).

[8] Wang D J, Li W M, Xu Y S et al. A fast auto-focusing technique for the TDI-CCD panoramic aerial camera[J]. Journal of Optoelectronics·Laser, 23, 1452-1457(2012).

[9] Wang G M, Lao D B, Zhou W H. Optical system design and tolerance analysis of photoelectric self-collimation theodolite[J]. Laser & Optoelectronics Progress, 54, 102203(2017).

[10] Gao S, Qiu J, Liu C. Ambiguity function based computational imaging model for focal sweep[J]. Laser & Optoelectronics Progress, 55, 071103(2018).

[11] Li Q. Studies on the theory and implementation method of digital autofocus technology[D]. Hangzhou: Zhejiang University, 11-13(2004).

[12] Vigoureux J M, Courjon D. Detection of nonradiative fields in light of the Heisenberg uncertainty principle and the Rayleigh criterion[J]. Applied Optics, 31, 3170-3177(1992).

[13] Tsang M, Nair R, Lu X M. Rayleigh’s criterion is irrelevant to the localization of two incoherent optical point sources. [C]∥Conference on Lasers and Electro-Optics, June 5-10, 2016, San Jose, California, United States. Washington, D.C.: OSA, FF1C, 1(2016).

[14] Minin I, Minin O. 3D diffractive lenses to overcome the 3D Abbe subwavelength diffraction limit[J]. Chinese Optics Letters, 12, 060014(2014). http://www.opticsjournal.net/Articles/Abstract?aid=OJ140530000016bHeKgN

[15] Haeberlé O, Xu C, Dieterlen A et al. Multiple-objective microscopy with three-dimensional resolution near 100 nm and a long working distance[J]. Optics Letters, 26, 1684-1686(2001).

[16] Wang X. Auto-focusing technique for aerial camera base on image processing[D]. Chengdu: University of Chinese Academy of Sciences, 13-16(2014).

[17] Hong Y Z, Ren G Q, Sun J. Analysis and improvement on sharpness evaluation function of defocused image[J]. Optics and Precision Engineering, 22, 3401-3408(2014).

[18] Shi L, Jin G, Tian H Y et al. Autofocusing method with automatic calibration for aerial camera[J]. Optics and Precision Engineering, 16, 2460-2464(2008).

[19] Zhang J, Li C R, Li X H et al. A research on MTF estimation and accuracy analysis based on radial-target method[J]. Remote Sensing Technology and Application, 29, 523-530(2014).

[20] Sui C H, Han Y H, Xu D Y et al. Real-time image detection in corneal topography[J]. Acta Optica Sinica, 37, 0611001(2017).

[21] Zhang F, Zhang R Y, Li Z Z. Image quality assessment based on symmetry phase congruency[J]. Laser & Optoelectronics Progress, 54, 101003(2017).

[22] Masini A, Diani M, Corsini G et al. Automatic focusing techniques for infrared sensors[J]. Proceedings of SPIE, 6737, 67370Q(2007).

[23] Xian T, Subbarao M. Depth-from-defocus: blur equalization technique[J]. Proceedings of SPIE, 6382, 63820E(2006).