Original document(34 pages)  中文版
    The related lens with high variable-focus rate and small size comprises: a front group, which includes a negative falcate lens, a biconcave negative lens and a positive third lens; and a back group, which includes a positive fourth lens, a fifth biconvex lens, and a sixth/seventh negative falcate lens. Wherein, the fourth and seventh lenses are aspheric lens made of plastic material.
Application Number
申请号		 200510099900 Application Date
申请日		 2005.09.09
Title 名称 Zoom lens
Publication Number
公开号		 1928613 Publication Date
公开日		 2007.03.14
Approval Pub. Date Granted Pub. Date
International Classification 分类号 G02B15/14;G02B9/64;G02B13/18
Applicant(s) Name
申请人		 A-Optronics
Address 地址
Inventor(s) Name 发明人
Attorney & Agent 代理人 wangyu shuang panpei kun
More information 更  多  信  息


 Related patents information
Light-collecting assembly with high light-collecting efficiency and display with the same assembly
Projection display device of reflection optical valve
Light splitting-gathering flat projection display
LED display
Dual-light-valve projection display
Display with light gathering module containing spherical reflector
Rear projection display device and its rear projection display screen and design method
Brightening piece and back light module
Optical system preventing vibration of hand
Zoom lens
Google
Note:All patent data come from State Intellectual Property Office of the People's Republic of China. If there were discrepancies between here and the State Intellectual Property office, the later is more accurate. The patent data is only for public exchange and learning purposes. We are not responsible for the adverse consequences with unverified use of the data.