Structural realization of small zoom camera
-
摘要: 介绍了一种小型大变倍比变焦相机的主要技术参数,以及采用的变焦方法;详细描述了相机的组成结构,其中变倍和补偿透镜组通过滑架在主体内滑动,其运动轨迹取决于导钉在凸轮曲线槽内的运动状态;阐述了加工和装调过程中为保证相机设计质量而采取的精度保证措施,凸轮曲线槽与滚子的配合间隙应控制在6~9 m,确保主体的刚度和圆柱度,变倍和补偿滑架在主体内滑动时的返回空回误差2,滑架直径D与滑架长度L之间的比值1。经高低温和振动试验后检测结果表明:在50 lp/mm空间频率下,相机光学传递函数0.2,相机外景成像清晰,层次分明。Abstract: The main technical parameters and the zoom method for the camera with small size and large zoom ratio are introduced. Each structural part of the camera is described in detail. The zoom and compensating lens group slide in the main body through the slide frame, whose movements are assured by the movement of the guide pin in the cam curve groove. The measures to ensure the quality and the precision taken in the process and assembling of the camera are expatiated. The clearance between cam curve groove and roller is controlled about 6~9 m, and the stiffness and column of the main body are insured. The return errors are less than 2 when the zoom and compensation slide frame slide in the main body. The ratio between diameter and length of the slide frame should be no less than 1. The results show that optical transfer function of the camera is more than 0.2 in the space frequency of 50 lp/mm after high-and-low temperature vibration tests, and the location images of camera are clear.
-
Key words:
- zoom camera /
- cam /
- precision /
- optical transfer function
-
[1] 刘崇进, 史光辉. 机械补偿法变焦镜头三个发展阶段的概况和发展方向[J]. 应用光学, 1992, 13(2):12-13. LIU CH J, SHI G H. General situations of mechanical compensation zoom lens in its three development phases and its developing direction[J]. J. Appl. Opt., 1992, 13(2):12-13.(in Chinese) [2] 孟军和, 张振, 孙兴文. 变焦距镜头的凸轮优化设计[J]. 红外与激光工程, 2002, 31(1):51-54. MENG J H, ZHANG ZH, SUN X W. Cam optimization of a zoom lens[J]. Infrared and Laser Engineerin, 2002, 31(1):51-54.(in Chinese) [3] 史亚莉, 王一凡, 宋春鹏, 等. 连续变焦距镜头焦距实时输出问题研究[J]. 仪器仪表学报, 2006, 27(6):50-51. SHI Y L, WAN G Y F, SONG CH P, et al.. Active focal length output of zoom lens[J]. Chinese J. Scientific Instrument, 2006, 27(6):50-51.(in Chinese) [4] COX A. A survey of zoom lenses[J]. SPIE, 1997, 3129:2-12. [5] 王一凡, 薛育. 一种大口径高精度凸轮变焦机构的设计[J]. 光学 精密工程, 2007, 15(11):1756-1759. WANG Y F, XUE Y. Design of heavy caliber and high precision cam varifocal mechanism[J]. Opt. Precision Eng., 2007, 5(11):175-21759.(in Chinese) [6] ARTHU R COX J, CALDW ELL B. Tracking zoom lens: a survery of zoom lenses[J]. SPIE, 1997, 3129:2212. [7] 田铁印, 王红, 谷凤安. 三线阵立体测绘相机光学系统设计[J]. 光学 精密工程, 2009, 17(11):2692-2698. TIAN T Y, WANG H, GU F A. Optical system design of three-linearray stereoscopic mapping camera[J]. Opt. Precision Eng., 2009, 17(11):2692-2698.(in Chinese) [8] 白瑜, 杨建峰, 阮萍. 长波红外连续变焦光学系统设计[J]. 光电技术应用, 2008, 23(5):15-17, 21. BAI Y, YANG J F, RUAN P. Design of long wavelength infrared cont inuous zoom optical system[J]. Electrooptic Technology Appl., 2008, 23(5):15-17, 21.(in Chinese) [9] 苗健宇, 张立平, 吴清文. 测绘相机光学镜筒设计加工及装配[J]. 光学 精密工程, 2008, 16 (9):1648-1653. MIAO J Y, ZHANG L P, WU Q W. Design, manufacturing and assembly for optical lens of mapping camera[J]. Opt. Precision Eng., 2008, 16(9):1648-1653.(in Chinese) [10] 梁来顺. 变焦距系统设计的快速求解[J]. 应用光学, 2004, 25(1):17-20. LANG L SH. A rapid computing method of zoom optical design[J]. J. Appl. Optics, 2004, 25(1):17-20.(in Chinese) [11] 苗健宇, 张立平, 吴国栋. 三线阵CCD立体测绘相机结构实现技术[J]. 仪器仪表学报, 2011, 32(10):2183-2189. MIAO J Y, ZHANG L P, WU G D. Realizable technology of light-machine structure for three-line CCD tridimensional mapping camera[J]. Chinese J. Scientific Instrument, 2011, 32(10):2183-2189.(in Chinese) [12] 张存武. 变焦距光学系统设计[D].长春:长春理工大学, 2006:25-45. ZHANG C W. Design of zooming optical system[D]. Changchun:Changchun University of Science and Technology, 2006:25-45.(in Chinese) [13] 苗健宇, 张立平, 翟岩. 三线阵CCD立体测绘相机集成装调技术[J]. 中国光学, 2012, 23(8):366-372. MIAO J Y, ZHANG L P, ZHAI Y. Technology of integrative assembly for three-line array CCD tridimensional mapping camera[J]. Chinese Optics, 2012, 23(8):366-372.(in Chinese) [14] 陈鑫, 付跃刚. 变焦系统凸轮曲线的优化设计[J]. 应用光学, 2008, 29(1):63-64, 74. CHEN X, FU Y G. Optimal design of cam curve for zoom system[J]. J. Appl. Opt., 2008, 29(1):63-64, 74.(in Chinese)
点击查看大图
计量
- 文章访问数: 1850
- HTML全文浏览量: 507
- PDF下载量: 666
- 被引次数: 0