【摘要】 通常,圆盘型全息扫描器产生圆弧状的扫描线,从而限制了扫描跨度,也影响了扫描器的分辨能力。本文提出一种能产生大跨度、直线扫描的圆盘型全息扫描器之结构方案。用等周期的直线全息光栅代替一般圆盘型全息扫描器中的全息透镜,并在光栅后增设一两次反射的直角角镜。全息光栅将入射其上的细激光束偏折构成扫描光束,经由直角镜的双反射,再次经过全息光栅衍射,最终在扫描平面上形成直的扫描线。文中对上述方案的工作原理作了分析和试验验证。此外,对全息扫描器的应用作了进一步的探讨。更多还原

【Abstract】 Now scan-lines were usually produced in holographic disk scan-ners,and so the scan-length and resolution of scanners would be limited,method for producing large span and straight line scanning is proposed.Gene-ral holographic lenses used as scanning elements are replaced by a series ofequalperiod holographic gratings with straight grating lines,and an orthogo-nal mirror system is used for accomplishing secondary diffraction.A narrow beamof laser is deflected by the grating and is reflected by the orthogonal mirrorand then to be diffracted again by the original grating.The secondary diff-racted beam can produce straight scan-lines.In this paper,the principle of themethod is analyzed the experimental verification is given and its applicationare discussed.更多还原