摘要
提出一种激光片光三维传感中降低散斑影响的新方法：片光面内扫描合成孔径法。通过向被测物体表面投射面内扫描的片状激光束，产生空间变化的动态散斑光场，这样的光场在成像透镜光瞳平面上的移动，其时间平均效果等效于利用了一个大的“合成孔径”，降低了散斑的影响，明显地提高了测量精度。
A new method combined aperture by in plane scanning laser sheet for reducing speckle in laser sheet 3 D sensing is suggested. Scanning the laser sheet within the sheet plane, a dynamic speckle field is shifted on the image lens of CCD camera. Image speckel is occurred on the image plane of CCD, the time integration of the CCD equals to averaging of the image speckle. So the speckle noise is reduced. This method is similar to the moving aperture within a 'combined lens' on the image lens, which is larger than the actual aperture. An analytical description is presented and verified experimentally.
出处
《光学学报》
EI
CAS
CSCD
北大核心
1997年第2期211-215,共5页
Acta Optica Sinica
基金
国家自然科学基金
