Optics: measuring and testing – By light interference – Having light beams of different frequencies
Reexamination Certificate
2008-12-30
2011-12-06
Chowdhury, Tarifur (Department: 2886)
Optics: measuring and testing
By light interference
Having light beams of different frequencies
Reexamination Certificate
active
08072609
ABSTRACT:
An enhanced sensitivity laser vibrometer with increased output signal strength and more sensitive surface vibration detection, is provided by using a reflective mirror assembly to repeatedly bounce the sensing laser beam against the acoustic pressure-sensing diaphragm to magnify the acoustic incident pressure wave being detected. The enhancement in signal strength, in terms of power spectral density, is a function of the number of bounces squared and the detection of surface vibrations with a displacement of smaller than 4 picometers is demonstrated experimentally.
REFERENCES:
patent: 5394233 (1995-02-01), Wang
patent: 6600564 (2003-07-01), Wang et al.
Swaminathan Venkataraman
Trivedi Sudhir
Wang Chen-Chia
Chowdhury Tarifur
Cook Jonathon
Goldfine Henry S.
The United States of America as represented by the Secretary of
LandOfFree
Enhanced sensitivity vibrometer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Enhanced sensitivity vibrometer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Enhanced sensitivity vibrometer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4298722