广角微型投影镜头设计
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摘要
投影机更新速度快,高分辨率、轻便微小的投影机已是时代的需求。通过分析微型投影成像系统的特点,根据几何光学理论,用Zemax软件设计了一款投影显示芯片为0.61inch(1inch=2.54cm)、投射比为0.68∶1的微型投影镜头。镜头由2片非球面透镜和6片常用玻璃材料透镜组成,结构简单,系统光学总长为60mm,有效焦距为9.26mm,后工作距离大于20mm,最大口径小于23mm,全视场(FOV)为80°,相对孔径为1∶2.2。在71lp/mm特征频率处,全视场的调制传递函数均大于0.5,全视场相对畸变小于2.0%,镜头成像质量好。对微型投影系统进行容差分析,得出一套较为宽松的公差,适合生产加工。
The projector technology develops quickly,and current projectors have high resolution and small volume.The light mini-projector is required.By analyzing the features of the mini-projector imaging system and according to the theory of geometrical optics,we design a mini-projector lens with Zemax.The projection display chip size is 0.61inch(1inch=2.54cm)and the projection ratio is 0.68∶1.It is composed of 2plastic aspheric lenses and 6common glass lenses with simple structure.Its total length is 60 mm.The effect focal length is 9.26 mm and the back working distance is more than 20 mm.The largest diameter is less than 23 mm,the field of view(FOV)is 80°,and the relative aperture is 1∶2.2.Its modulated transfer function in full field is highter than 0.5at 71lp/mm.The relative full-FOV distortion of the lens is less than 2.0%.The imaging quality of the lens is good.Based on the tolerance analysis of the system,a set of loose machining tolerance is achieved.
The projector technology develops quickly,and current projectors have high resolution and small volume.The light mini-projector is required.By analyzing the features of the mini-projector imaging system and according to the theory of geometrical optics,we design a mini-projector lens with Zemax.The projection display chip size is 0.61inch(1inch=2.54cm)and the projection ratio is 0.68∶1.It is composed of 2plastic aspheric lenses and 6common glass lenses with simple structure.Its total length is 60 mm.The effect focal length is 9.26 mm and the back working distance is more than 20 mm.The largest diameter is less than 23 mm,the field of view(FOV)is 80°,and the relative aperture is 1∶2.2.Its modulated transfer function in full field is highter than 0.5at 71lp/mm.The relative full-FOV distortion of the lens is less than 2.0%.The imaging quality of the lens is good.Based on the tolerance analysis of the system,a set of loose machining tolerance is achieved.
引文
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[2]代会娜.基于Zemax的LCoS微型投影镜头设计研究[D].长春:长春理工大学,2010:1-70.
[3]李晓彤,岑兆丰.几何光学·像差·光学设计[M].杭州:浙江大学出版社,2007:12.
[4]宋家军,何平安.LCoS背投光学引擎中变焦投影物镜设计[J].应用光学,2007,28(1):58-62.
[5]韩景福.MD投影机中的光学元器件(五)!投影镜头[J].现代显示,2010,21(6):5-8,24.
[6]张登臣,郁道银.实用光学设计方法与现代光学系统[M].北京:机械工业出版社,1995.
[7]刘钧,高明.光学设计[M].西安:国防工业出版社,2012:4.
[8]高志山.Zemax软件在像差设计中的应用[M].南京:南京理工大学出版社,2006.
[9]李维善,陈琛,张禹,等.基于Zemax软件的DLP微型投影镜头的设计[J].应用光学,2011,32(6):1121-1125.
[10]沈为民,薛鸣球.非球面眼镜片的像差分析和设计[J].光学学报,2002,22(6):743-748.
[11]张远健,唐勇,王鹏,等.光学系统设计中降低公差灵敏度的方法[J].光电工程,2011,38(10):127-133.
[12]薛雷涛,林峰.800万像素超薄广角手机镜头设计[J].激光与光电子学进展,2015,52(10):102204.
[13]刘琳,张兴德,贺谊亮.基于蒙特卡洛模拟法的红外光学系统公差分析[J].激光与红外,2010,40(5):496-499.
[14]董家宁,牟达,徐春云,等.基于DMD的红外景象模拟投影光学系统设计[J].激光与光电子学进展,2012,49(12):122202.