[1] GRIENBERGER C, KONNERTH A. Imaging calcium in neurons[J]. Neuron, 73, 862-885(2012).

[2] YU H, SENARATHNA J, TYLER B M et al. Miniaturized optical neuroimaging in unrestrained animals[J]. NeuroImage, 113, 397-406(2015).

[3] CHEN SH Y, WANG Z CH, ZHANG D et al. Miniature fluorescence microscopy for imaging brain activity in freely-behaving animals[J]. Neuroscience Bulletin, 36, 1182-1190(2020).

[4] FU Q, ZHANG ZH M, ZHAO SH N. Research progress of miniature head-mounted single photon fluorescence microscopic imaging technique[J]. Chinese Optics, 16, 1010-1021(2023).

[5] RYNES M L, SURINACH D A, LINN S et al. Miniaturized head-mounted microscope for whole-cortex mesoscale imaging in freely behaving mice[J]. Nature Methods, 18, 417-425(2021).

[6] GHOSH K K, BURNS L D, COCKER E D et al. Miniaturized integration of a fluorescence microscope[J]. Nature Methods, 8, 871-878(2011).

[7] CAI D J, AHARONI D, SHUMAN T et al. A shared neural ensemble links distinct contextual memories encoded close in time[J]. Nature, 534, 115-118(2016).

[8] LIBERTI W A, PERKINS L N, LEMAN D P et al. An open source, wireless capable miniature microscope system[J]. Journal of Neural Engineering, 14, 045001(2017).

[9] SKOCEK O, NÖBAUER T, WEILGUNY L et al. High-speed volumetric imaging of neuronal activity in freely moving rodents[J]. Nature Methods, 15, 429-432(2018).

[10] JACOB A D, RAMSARAN A I, MOCLE A J et al. A compact head-mounted endoscope for in vivo calcium imaging in freely behaving mice[J]. Current Protocols in Neuroscience, 84, e51(2018).

[11] AHARONI D, KHAKH B S, SILVA A J et al. All the light that we can see: a new era in miniaturized microscopy[J]. Nature Methods, 16, 11-13(2019).

[12] BAGRAMYAN A. Lightweight 1-photon miniscope for imaging in freely behaving animals at subcellular resolution[J]. IEEE Photonics Technology Letters, 32, 909-912(2020).

[13] DE GROOT A, VAN DEN BOOM B J G, VAN GENDEREN R M et al. NINscope, a versatile miniscope for multi-region circuit investigations[J]. eLife, 9, e49987(2020).

[14] YANNY K, ANTIPA N, LIBERTI W et al. Miniscope3D: optimized single-shot miniature 3D fluorescence microscopy[J]. Light:Science & Applications, 9, 171(2020).

[15] SHUMAN T, AHARONI D, CAI D J et al. Breakdown of spatial coding and interneuron synchronization in epileptic mice[J]. Nature Neuroscience, 23, 229-238(2020).

[16] BAGRAMYAN A, TABOURIN L, RASTQAR A et al. Focus-tunable microscope for imaging small neuronal processes in freely moving animals[J]. Photonics Research, 9, 1300(2021).

[17] WANG Y ZH, MA ZH T, LI W ZH et al. Cable-free brain imaging for multiple free-moving animals with miniature wireless microscopes[J]. Journal of Biomedical Optics, 28, 026503(2023).

[18] [18] SCOTT B B, THIBERGE S Y, GUO C Y, et al. Imaging ctical dynamics in GCaMP transgenic rats with a headmounted widefield macroscope[J]. Neuron, 2018, 100(5): 10451058. e5.

[19] GUO CH L, BLAIR G J, SEHGAL M et al. Miniscope-LFOV: a large-field-of-view, single-cell-resolution, miniature microscope for wired and wire-free imaging of neural dynamics in freely behaving animals[J]. Science Advances, 9, 3918-3918(2023).

[20] XU B B, LI H M, GAO SH L et al. Metalens-integrated compact imaging devices for wide-field microscopy[J]. Advanced Photonics, 2, 066004(2020).

[21] TSENG E, COLBURN S, WHITEHEAD J et al. Neural Nano-optics for high-quality thin lens imaging[J]. Nature Communications, 12, 6493(2021).

[22] LIU Y, YU Q Y, CHEN Z M et al. Meta-objective with sub-micrometer resolution for microendoscopes[J]. Photonics Research, 9, 106-115(2021).

[23] AIETA F, GENEVET P, KATS M et al. Aberrations of flat lenses and aplanatic metasurfaces[J]. Optics Express, 21, 31530-31539(2013).

[24] YOUNG M. Zone plates and their aberrations[J]. Journal of the Optical Society of America, 62, 972-976(1972).

[25] [25] GROSS H. Hbook of Optical Systems (Volume 3: Aberration They Crection of Optical Systems)[M]. Weinheim: John Wiley & Sons Inc, 2007.

[26] WANG CH M, LIN Y, HAN Y M et al. Fabricable concentric-ring metalens with high focusing efficiency based on two-dimensional subwavelength unit splicing[J]. Optics Express, 31, 33596-33607(2023).

[27] JIN ZH, LIN Y, WANG CH M et al. Topologically optimized concentric-nanoring metalens with 1 mm diameter, 0.8 NA and 600 nm imaging resolution in the visible[J]. Optics Express, 31, 10489-10499(2023).