- 专利标题: LASER SCANNING SYSTEM EMPLOYING AN OPTICS MODULE CAPABLE OF FORMING A LASER BEAM HAVING AN EXTENDED DEPTH OF FOCUS (DOF) OVER THE LASER SCANNING FIELD
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申请号: US13233332申请日: 2011-09-15
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公开(公告)号: US20130070322A1公开(公告)日: 2013-03-21
- 发明人: Bernard Fritz , James Allen Cox , Peter L. Reutiman
- 申请人: Bernard Fritz , James Allen Cox , Peter L. Reutiman
- 主分类号: G02B26/10
- IPC分类号: G02B26/10 ; G06K7/14
摘要:
A laser scanning system having a laser scanning field, and a laser beam optics module with an optical axis and including: an aperture stop disposed after a laser source for shaping the laser beam to a predetermined beam diameter; a collimating lens for collimating the laser beam produced from the aperture stop; an apodization element having a first and second optical surfaces for extending the depth of focus of the laser beam from the collimating lens; and a negative bi-prism, disposed after the apodization element, along the optical axis, to transform the energy distribution of the laser beam and cause the laser beam to converge to substantially a single beam spot along the far-field portion of the laser scanning field, and extend the depth of focus of the laser beam along the far-field portion of the laser scanning field.
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