Optical: systems and elements – Optical modulator – Light wave temporal modulation
Reexamination Certificate
2005-06-29
2010-12-21
Mack, Ricky L (Department: 2873)
Optical: systems and elements
Optical modulator
Light wave temporal modulation
C359S305000, C359S312000
Reexamination Certificate
active
07855823
ABSTRACT:
The present invention provides an acoustooptic device usable even with light in the ultraviolet region, free from laser damage and optical damage, and excellent in acoustooptic performance and an optical imaging apparatus using the same. The acoustooptic device according to the present invention includes a high-frequency signal input part (65), a transducer part (64), and an acoustooptic medium (6). A high-frequency signal input from the high-frequency signal input part (65) is converted into a mechanical vibration by the transducer part (64), and an optical characteristic of the acoustooptic medium (6) varies depending on the mechanical vibration. The acoustooptic medium is formed of a Group III nitride crystal. The optical imaging apparatus according to the present invention includes a light source, an acoustooptic device, a driving circuit, and an image plane. Light from the light source is diffracted by the acoustooptic device in accordance with a signal from the driving circuit and the resultant diffracted light forms an image on the image plane. An acoustooptic medium of the acoustooptic device is formed of a Group III nitride crystal.
REFERENCES:
patent: 6414781 (2002-07-01), Saitoh
patent: 6577375 (2003-06-01), Umehara et al.
patent: 6592663 (2003-07-01), Surayama et al.
patent: 6630693 (2003-10-01), Martin et al.
patent: 6692568 (2004-02-01), Cuomo et al.
patent: 6903862 (2005-06-01), Minemoto et al.
patent: 2004/0090660 (2004-05-01), Minemoto et al.
patent: 11-218612 (1999-08-01), None
patent: 2000-284700 (2000-10-01), None
patent: 2001-102316 (2001-04-01), None
patent: 2002-527343 (2002-08-01), None
patent: 2002-365535 (2002-12-01), None
patent: 2003-195421 (2003-07-01), None
patent: 2003-215648 (2003-07-01), None
patent: 2004-170940 (2004-06-01), None
patent: 2004-300024 (2004-10-01), None
patent: 00/22204 (2000-04-01), None
Chang, et al., “High Performance AOTFs for Ultraviolet”, Proceedings of 1988 IEEE Ultrasonics Symposium, pp. 1289-1292.
Uchida, et al., “Acoustooptic Deflection Materials and Techniques”, Proceedings of the IEEE, vol. 61, No. 8, 1973, pp. 1073-1092.
Rimeika, et al., “Diffraction of guided optical waves by surface acoustic waves in GaN”, Applied Physics Letters, vol. 77, No. 4, 2000, pp. 480-482.
Bu, et al., “Guided-wave acousto-optic diffraction in A1×Ga1-×N epitaxial layers”, Applied Physics Letters, vol. 85, No. 12, 2004, pp. 2157-2159.
Rimeika, et al., “Acousto-optic diffraction of blue and red light Gan”, Applied Physics Letters, vol. 80, No. 10, March 11, 2002, pp. 1701-1703.
Kidoguchi Isao
Kitaoka Yasuo
Minemoto Hisashi
Negami Takayuki
Nishiyama Toshimi
Hamre Schumann Mueller & Larson P.C.
Mack Ricky L
Panasonic Corporation
Thomas Brandi N
LandOfFree
Acoustooptic device and optical imaging apparatus using the... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Acoustooptic device and optical imaging apparatus using the..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Acoustooptic device and optical imaging apparatus using the... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4161131