Optical: systems and elements – Single channel simultaneously to or from plural channels – By partial reflection at beam splitting or combining surface
Reexamination Certificate
2006-05-12
2010-11-02
Dinh, Jack (Department: 2873)
Optical: systems and elements
Single channel simultaneously to or from plural channels
By partial reflection at beam splitting or combining surface
C359S634000
Reexamination Certificate
active
07826140
ABSTRACT:
A laser marking device (1) includes a laser light source (24) that emits a laser beam, and a beam splitter (230) receiving the laser beam and allowing a part of the laser beam to be reflected thereat and a remaining part of the laser beam to be transmitted therethorogh. The beam splitter (230) has an unpolarized film (233a,233b) into which the laser beam is entered to divide the laser beam into a plurality of laser beams that travels in different directions, at a predetermined rate regardless of change of a polarized characteristic of the laser beam.
REFERENCES:
patent: 5808798 (1998-09-01), Weber et al.
patent: 5984484 (1999-11-01), Kruer
patent: 6622392 (2003-09-01), Bourget
patent: 6970294 (2005-11-01), Nishimura
patent: 23 66 434 (1975-01-01), None
patent: 1-92702 (1989-04-01), None
patent: 10-141957 (1998-05-01), None
patent: 2003-329816 (2003-11-01), None
Azzam, “Simultaneous Reflection and Refraction of Light Without Change of Polarization by a Single-layer-Coated Dielectric Surface,” Opt. Lett. 10, 107-109 (1985).
Azzam, “Variable-reflectance thin-film polarization-independent beam splitters for 0.6328- and 10.6μm laser light,” Opt. Lett. 10, 110-112, (1985).
Ciosek, J. et al “Design and manufacture of all-dielectric nonpolarising beam splitters,” Appl. Opt. 38(7), 124401250 (1999).
Ho and Dobrowolski, “Neutral and Colour-selective beam splitting assemblies with polarization-independent intensities,” Appl. Opt. 31, 3813-3820 (1992).
Ito Yutaka
Matsushita Kazunori
Nishimura Takashi
Tadano Noritaka
Antonelli, Terry Stout & Kraus, LLP.
Dinh Jack
Hitachi Koki Co,. Ltd.
LandOfFree
Laser marking device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Laser marking device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laser marking device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4164388