发明授权
- 专利标题: Multiple reference laser beam apparatus
- 专利标题(中): 多参考激光束装置
-
申请号: US734325申请日: 1985-05-15
-
公开(公告)号: US4676598A公开(公告)日: 1987-06-30
- 发明人: Theodore J. Markley , Richard J. Omlor , William K. Vatter , Mark D. Sobottke
- 申请人: Theodore J. Markley , Richard J. Omlor , William K. Vatter , Mark D. Sobottke
- 申请人地址: CA San Jose
- 专利权人: Spectra-Physics, Inc.
- 当前专利权人: Spectra-Physics, Inc.
- 当前专利权人地址: CA San Jose
- 主分类号: G01C15/00
- IPC分类号: G01C15/00 ; G02B27/14
摘要:
Apparatus for projecting a laser beam to provide simultaneously a stationary reference beam and a moving reference beam, which rotates in a plane normal to the stationary reference beam, includes a beam diverting arrangement for intercepting a primary beam and for splitting the beam into the two reference beams. The beam diverting arrangement includes first and second deflecting elements which deflect the beam by 90.degree. with respect to the primary beam. A portion of the primary beam, striking the first deflecting element, passes through the element and is shifted slightly by refraction. This shift is compensated by a third beam deflecting element which is fully transmissive, and which refracts the stationary reference beam into alignment with the primary beam. By cutting the first and third deflection elements from the same sheet of material and reorienting the elements appropriately, slight deviation from parallelism in the opposing surfaces of the sheet of material are compensated.
公开/授权文献
- US5715780A Cam phaser position detection 公开/授权日:1998-02-10