多波长、大工作面折-衍混杂f-θ镜头设计  

Design of hybrid refractive-diffractive f-θ lens with multi-wavelength,large working area

作　　者：王相京[1] 吴金才[1] 陈结祥[1] 张毅[1] 涂碧海[1] 赵平建[1] 刘建国[1] 

机构地区：[1]中国科学院安徽光学精密机械研究所,安徽合肥230031

出　　处：《红外与激光工程》2009年第1期79-81,95,共4页Infrared and Laser Engineering

基　　金：国家部委预研项目(42001070302)

摘　　要：目前国内用于激光扫描系统的f-θ镜头的工作面积一般不超过350mm×350mm。国外虽有面积较大的f-θ镜头,但结构相当复杂。为了能够得到工作面积大而且结构相对简单的f-θ镜头来满足扫描系统的要求,利用二元光学元件的特殊色散性质,设计了工作于808～1064nm波段的折-衍混杂f-θ镜头,激光扫描范围为450mm×450mm。它由四片两种普通玻璃球面透镜构成,光学筒长不到120mm。该镜头结构简单紧凑,单波长工作时聚焦性能达到衍射极限、线性畸变小,能够满足现代多工作波长激光扫描系统的实际需求。The working area of f-θ lens is generally not larger than 350 mm×350 mm when used in laser scanning system, f-θ lenses with larger working areas overseas are of complicated structures. In order to obtain the f-θ lens with large working areas and relative simple structure to satisfy the scanning system＇s request, the special dispersion character of the binary optical element was applied, hybrid refractive-diffractive ff-θ lenses working on the wavelength from 808 nm to 1 064 nm was designed with the scanning ranges 450 mm×450 mm. The optical system was composed of only four spherical lenses with two kinds of common optical glasses. The tube length was less than 120 mm. The system＇s structure was compact, its focusing performance was diffraction- limited working at the single wavelength, its distortion was small relative to the f-θ linear relation. The system meets the requirements of laser scanning systems with different waves on a large area.

关 键 词：光学设计 f-θ镜头 折-衍混杂系统 二元光学 

分 类 号：TB133[机械工程—光学工程]