Surgery – Instruments – Light application
Reexamination Certificate
2005-09-06
2005-09-06
Johnson, III, Henry M (Department: 3739)
Surgery
Instruments
Light application
C606S004000
Reexamination Certificate
active
06939343
ABSTRACT:
An ophthalmic laser surgical apparatus includes a laser irradiation optical system which irradiates a laser beam which causes ablation on tissue of an eye; a sound collecting unit which receives a shock sound which is generated during the ablation of the eye tissue; and a monitor unit which is connected to the sound collecting unit and detects a degree of dryness of the eye tissue during the ablation based on a sound pressure level of a sound signal from the sound collecting unit.
REFERENCES:
patent: 5196006 (1993-03-01), Klopotek et al.
patent: 5624436 (1997-04-01), Nakamura et al.
patent: 5637109 (1997-06-01), Sumiya
patent: 5738677 (1998-04-01), Colvard et al.
“Noncontact photoacoustic spectroscopy during photoablation with a 193-nm excimer laser”, Jean et al., German Journal of Ophthalmolgy 1993 Nov;2(6):404-8.
Hashishin et al. “Shock Sound Characteristics of Biotissues by Laser Irradiation”, Department of Electrical Engineering, School of Science and Engineering, Kinki University, pp 1-6.
Johnson, III Henry M
Nidex Co., Ltd.
Oliff & Berridg,e PLC
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