Title:
LASER ANTIREFLECTION DEVICE AND LASER APPARATUS COMPRISING SAME
Document Type and Number:
WIPO Patent Application WO/2012/069017
Kind Code:
A1
Abstract:
A laser antireflection device comprises a polarizing beam splitter (10), a λ/4 wave plate (20), and an absorber (30) placed in an outgoing optical path of a laser (500) for emitting a linearly polarized light beam with the wavelength of λ. The linearly polarized light beam emerging from the laser passes through the polarizing beam splitter and the λ/4 wave plate in turn to become a circularly polarized light beam. After the circularly polarized light beam reaches a work piece (200) to be processed, a part of the circularly polarized light beam reflected by the work piece to be processed along the original optical path passes through the λ/4 wave plate to become a linearly polarized light beam with the polarization direction vertical to the polarization direction of the outgoing linearly polarized light beam. The vertical linearly polarized light beam passes through the polarizing beam splitter, deviates from the optical path of the outgoing linearly polarized light beam, and reaches the absorber. The laser antireflection device can prevent reflected light from damaging the laser and is especially suitable for a high power laser. A laser apparatus comprising the laser antireflection device is further provided.
Inventors:
WANG ZHIYONG (CN)
QIN WENBIN (CN)
CAO YINHUA (CN)
DAI JINGJING (CN)
GE TINGWU (CN)
QIN WENBIN (CN)
CAO YINHUA (CN)
DAI JINGJING (CN)
GE TINGWU (CN)
Application Number:
PCT/CN2011/082983
Publication Date:
May 31, 2012
Filing Date:
November 25, 2011
Export Citation:
Assignee:
SHANXI FEIHONG LASER TECH CO (CN)
WANG ZHIYONG (CN)
QIN WENBIN (CN)
CAO YINHUA (CN)
DAI JINGJING (CN)
GE TINGWU (CN)
WANG ZHIYONG (CN)
QIN WENBIN (CN)
CAO YINHUA (CN)
DAI JINGJING (CN)
GE TINGWU (CN)
International Classes:
H01S3/00; H01S5/00
Foreign References:
| CN201966481U | 2011-09-07 | |||
| CN102055127A | 2011-05-11 | |||
| CN201946875U | 2011-08-24 | |||
| CN102064464A | 2011-05-18 | |||
| CN101493582A | 2009-07-29 | |||
| CN1487264A | 2004-04-07 | |||
| CN1162812A | 1997-10-22 | |||
| US20050094146A1 | 2005-05-05 |
Other References:
See also references of EP 2645493A4
None
None
Attorney, Agent or Firm:
BEIJING GRANDERIP LAW FIRM (CN)
北京鸿元知识产权代理有限公司 (CN)
北京鸿元知识产权代理有限公司 (CN)
Download PDF:
Claims:
Previous Patent: PREFABRICATED THERMAL INSULATING COMPOSITE PANEL, ASSEMBLY THEREOF, MOULDED PANEL AND CONCRETE SLAB ...
Next Patent: HAND TOOL
Next Patent: HAND TOOL