Radiant energy – Photocells; circuits and apparatus – With circuit for evaluating a web – strand – strip – or sheet
Reexamination Certificate
2008-05-20
2008-05-20
Monbleau, Davienne (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
With circuit for evaluating a web, strand, strip, or sheet
C250S559400, C356S237100, C356S237200, C356S237300, C356S237400, C356S237500
Reexamination Certificate
active
11112044
ABSTRACT:
An optical test head comprises one or more optical input paths by which a beam of light is communicated from a light source to a workpiece and one or more optical output paths by which light reflected off of the workpiece is communicated to a detector. The input optical path and the output optical path can include one or more mirrors and one or more lenses. At least one of the optical paths includes a layer for trapping and/or absorbing stray light. One or more of the lenses includes an anti-reflective coating for reducing noise caused by unwanted light reflection off of the lenses. The optical paths include one or more masks reducing stray light. The one or more masks can have an adjustable aperture (e.g. an iris).
REFERENCES:
patent: 3089484 (1963-05-01), Hett
patent: 3335715 (1967-08-01), Hugenholtz et al.
patent: 4794264 (1988-12-01), Quackenbos et al.
patent: 4794265 (1988-12-01), Quackenbos et al.
patent: 5637863 (1997-06-01), Sanborn et al.
patent: 5649897 (1997-07-01), Nakamura
patent: 5677769 (1997-10-01), Bendett
patent: 5719840 (1998-02-01), Jann et al.
patent: 5875029 (1999-02-01), Jann et al.
patent: 5943130 (1999-08-01), Bonin et al.
patent: 6434297 (2002-08-01), Althaus et al.
patent: 6548821 (2003-04-01), Treves et al.
patent: 6566674 (2003-05-01), Treves et al.
patent: 6597006 (2003-07-01), McCord et al.
patent: 6624884 (2003-09-01), Imaino et al.
patent: 6888988 (2005-05-01), Vancoille et al.
patent: 6914868 (2005-07-01), Redmond et al.
patent: 7079472 (2006-07-01), Redmond et al.
patent: 2002/0088952 (2002-07-01), Rao et al.
patent: 2003/0132405 (2003-07-01), Some
patent: 2003/0184743 (2003-10-01), Hiramoto et al.
patent: 2004/0017561 (2004-01-01), Meeks
patent: 2005/0088748 (2005-04-01), Otteman
patent: 2005/0089262 (2005-04-01), Jenkins et al.
patent: 2006/0186362 (2006-08-01), Bills et al.
U.S. Appl. No. 11/113,258, entitled “Test Head for Optically Inspecting Workpieces”, filed Apr. 23, 2005.
U.S. Appl. No. 11/113,261, entitled “Test Head for Optically Inspecting Workpieces Comprising a Lens for Elongating a Laser Spot on the Workpieces”, filed Apr. 23, 2005.
U.S. Appl. No. 11/113,260, entitled “Method and Apparatus for Selectively Providing Data From a Test Head to a Processor”, filed Apr. 23, 2005.
U.S. Appl. No. 11/112,172, entitled Test Head for Optically Inspecting Workpieces, filed Apr. 22, 2005.
U.S. Appl. No. 11/112,190, entitled “Robotic System for Optically Inspecting Workpieces”, filed Apr. 22, 2005.
U.S. Appl. No. 11/112,536, entitled “Test Head for Optically Inspecting Workpieces”, filed Apr. 22, 2005.
U.S. Appl. No. 11/112,909, entitled “Circularly Polarized Light for Optically Inspecting Workpieces”, filed Apr. 22, 2005.
“Hard Disk Surface Inspection System RS-1350 Instructions Manual”, Hitachi Electronics Engineering Co., Ltd., printed prior to Jan. 13, 2004.
O'Dell Thomas A.
Treves David
Leeds, Esq. Kenneth E.
Monbleau Davienne
WD Media, Inc.
LandOfFree
Method and apparatus for reducing or eliminating stray light... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for reducing or eliminating stray light..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for reducing or eliminating stray light... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3914034