Optics: measuring and testing – By light interference – Having polarization
Reexamination Certificate
2008-07-29
2008-07-29
Connolly, Patrick (Department: 2877)
Optics: measuring and testing
By light interference
Having polarization
C356S513000
Reexamination Certificate
active
11207327
ABSTRACT:
The present invention relates to vibration-insensitive point-diffraction interferometry. For the purpose of obtaining high immunity to vibration, a single-mode optical fiber is used to generate the reference wave, by means of point diffraction, directly from a measurement wave reflected from test objects. The capability of vibration desensitization is further strengthened by adding a spatial phase-shift device that enables four interferograms of different amounts of phase shift to be obtained simultaneously with no time delay between interferograms. The present invention may be effectively used in the design of measuring systems for in-line applications where measurements need to be performed in the presence of significant levels of vibration.
REFERENCES:
patent: 6704112 (2004-03-01), Sommargren et al.
patent: 6879402 (2005-04-01), Kuchel
Osuk Y. Kwon, et al., “Stroboscopic Phase-Shifting Interferometry”,Optical Letters, vol. 12, No. 11, Nov. 1987, pp. 855-857.
R. Smythe, et al., “Instantaneous Phase Measuring Interferometry”,Optical Engineering, vol. 23, No. 4, Jul./Aug. 1984, pp. 361-364.
Toshihiko Yoshino, et al., “Closed-Loop Phase-Shifting Interferometry with a Laser Diode”,Optical Letters, vol. 23, No. 20, Oct. 15, 1998, pp. 1576-1578.
Kihm Hagyong
Kim Seung Woo
Park Jung Jae
Connolly Patrick
Korea Advanced Institute of Science and Technology (KAIST)
Mayer & Williams PC
Mayer, Esq. Stuart H.
Richey Scott M
LandOfFree
Vibration-insensitive interferometer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Vibration-insensitive interferometer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vibration-insensitive interferometer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3933955