[1] Zhu X B, Qian L Y, Chen J et al. Optical path design of LED and GRIN lens projection system[J]. Optics and Precision Engineering, 26, 62-69(2018).
[2] Xie X R, Yang B, Pan S et al. Design of catadioptric ultra-short focal length zoom projection lens[J]. Optical Technique, 46, 20-26(2020).
[3] Tang Z F, Mu D, Yang X et al. Projection system design of fixed focus and variable magnification for digital lithography based on DMD[J]. Journal of Changchun University of Science and Technology (Natural Science Edition), 42, 52-56(2019).
[4] Yu B H. Research on key technology of ultra-short-focus projection objective system based on freeform surfaces[D](2019).
[5] Yu B H, Tian Z H, Su D Q et al. Multi-fields optimization iterative design method for freeform surface in ultra-short-focus projection system[J]. Acta Photonica Sinica, 48, 0322001(2019).
[6] Qian L Y, Zhu X B, Cui H T et al. Design of optical path for miniature projection systems[J]. Laser Technology, 42, 385-389(2018).
[7] Zhao H L, Liang Z Y, Shi X C et al. The design of LED using in optical projector[J]. Acta Photonica Sinica, 36, 244-246(2007).
[8] Qu B X. Optical design of the DLP projection system based on RGB LED lighting[D](2013).
[9] Yan F, Wang S Y, Yin Y Z et al. Illumination design of micro projection system based on LEDs[J]. Natural Science Journal of Harbin Normal University, 23, 70-73(2007).
[10] Li X Y, Zhong B L, Wang L et al. Design of LED illumination system in LCOS micro-projector[J]. Optical Technique, 33, 751-753(2007).
[11] Bian Y X, Wang H, Guo T Y et al. Design of ultra-short throw ratio projection lens[J]. Acta Optica Sinica, 35, 1222002(2015).
[12] Chen C, Li W S, Zhang Y et al. Optical design of short focal digital projection lens[J]. Acta Photonica Sinica, 40, 1855-1859(2011).
[13] Liu X C, Chen C, Li W S et al. Design of universal short-focus projection lens[J]. Journal of Applied Optics, 37, 907-912(2016).
[14] Zhang Y, Chen C, Liu X C et al. Design of short-focus projection lens for LED digital projectors[J]. Infrared and Laser Engineering, 42, 2760-2764(2013).
[18] Liu J R, Li Y M. Complicated double Gs microscopical object lens design[J]. Equipment for Electronic Products Manufacturing, 40, 13-15(2011).
[19] Hu Y X, Zhou S X, Wang K Y. Camera lens with ultra-large aperture[J]. Optical Technology, 28, 226-227(2002).