Optics: measuring and testing – Lens or reflective image former testing
Reexamination Certificate
2005-08-30
2005-08-30
Stafira, Michael P. (Department: 2877)
Optics: measuring and testing
Lens or reflective image former testing
C356S636000
Reexamination Certificate
active
06937327
ABSTRACT:
A laser beam emitted from a laser source is split by a beam-splitting means such as a beam sampler, and the power Q of the split beam is measured by a first detector. In addition, the power q1of light that has passed through a pinhole while a DOE is not set is measured by a second detector, and the power ratio α=q1/Q is calculated. Then, the DOE is set and the power ratio βk=qk/Q, where qkis the power of each light beam, is calculated. The power ratio βkis evaluated on the basis of the power ratio α, so the optical properties of a diffractive optical element, in particular, in terms of diffraction efficiency in laser-beam diffraction and intensity uniformity of split beams can be measured with high accuracy.
REFERENCES:
patent: 3829219 (1974-08-01), Wyant
patent: 3930732 (1976-01-01), Holly
patent: 4275964 (1981-06-01), Vassiliadis
patent: 4641961 (1987-02-01), Yamada
patent: 4672196 (1987-06-01), Canino
patent: 4828385 (1989-05-01), Fukuma et al.
patent: 5113286 (1992-05-01), Morrison
patent: 5198867 (1993-03-01), Campbell
patent: 5620818 (1997-04-01), Yuan
patent: 6097488 (2000-08-01), Grek et al.
patent: 6195169 (2001-02-01), Naulleau et al.
patent: 6538749 (2003-03-01), Takata et al.
patent: 6573997 (2003-06-01), Goldberg et al.
patent: 2002/0051564 (2002-05-01), Benesch et al.
patent: 0 676 629 (1995-10-01), None
patent: 1 136 806 (2001-09-01), None
patent: 6-58841 (1994-03-01), None
patent: 9-196813 (1997-07-01), None
patent: 2000-288761 (2000-10-01), None
“Optical Properties of ZnSe Diffractive Optical Elements for Spot Array Generation” Keiji Fuse, et al.SEI Technical ReviewNo. 48 (Jun. 1999) pp. 69-78.
“High Speed Binary Optic Microlens Array in GaAs” M.E. Motamedi et al.SPIEVo. 1544Miniature and Micro-Optics: Fabrication and System Applications(1991) pp. 33-44.
“Diffractive Element in Optical Inspection of Paper” Raimo Silvernnoinen, et al. Society of Photo-Optical Instrumentation Engineers 37(5) (May 1998) pp. 1482-1487.
McDermott Will & Emery LLP
Stafira Michael P.
Sumitomo Electric Industries Ltd.
Valentin Juan D
LandOfFree
Apparatus and method of measuring optical properties of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method of measuring optical properties of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method of measuring optical properties of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3475058