Patents by Inventor K. M. Naga Srinivas Nadella
K. M. Naga Srinivas Nadella has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20160187761Abstract: Methods, systems and apparatus for manipulating electromagnetic radiation such as laser beams include a first acousto-optic deflector optimised for efficient transmission at the input beam angle and a second acousto-optic deflector of lower peak efficiency than the first acousto-optic deflector but which accepts beams from a wider range of angles at better transmission efficiency than the first acousto-optic deflector by passing a beam optimised for efficient transmission through the first acousto-optic deflector at the input beam angle, deflecting the beam using the first acousto-optic deflector, passing the deflected beam through the second acousto-optic deflector, which has a lower peak efficiency than the first acousto-optic deflector and accepts beams from a wider range of angles at better transmission efficiency than the first acousto-optic deflector, and deflecting the beam using the second acousto-optic deflector.Type: ApplicationFiled: July 10, 2015Publication date: June 30, 2016Applicant: UCL Business PLCInventors: Paul Anthony Kirkby, K. M. naga Srinivas Nadella, Robin Angus Silver
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Patent number: 9341919Abstract: Methods and apparatus for optimising, improving or maximising the efficiency of an acousto-optic lens (AOL) system are disclosed. Data relating to efficiency is used to select drive frequencies of the acousto-optic devices (AODs) forming the AOL, thereby both increasing the usable field of view and reducing a prior art patternation problem. Preferably according to the invention, drive frequencies are selected that maximise efficiency of transmission through the AOL. When scanning, the centre of each scan is optimised to be of maximum efficiency.Type: GrantFiled: April 20, 2011Date of Patent: May 17, 2016Assignee: UCL BUSINESS PLCInventors: Paul A. Kirkby, K. M. Naga Srinivas Nadella, R. Angus Silver
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Patent number: 9104087Abstract: Methods, systems and apparatus for manipulating electromagnetic radiation such as laser beams. A method and apparatus for correcting magnification chromatic aberration utilizes one or more dispersive lenses such that long wavelength components are magnified less than short wavelength components. A telecentric relay is preferred to achieve this aim. Further, the use of polarizers to block the undesired zeroth order components of diffraction emanating from acousto-optic deflectors (AODs) is disclosed. Furthermore, specific designs of AOD including narrow transducer AODs which produce a diverging acoustic wave and AODs having two transducers and a selection switch are disclosed.Type: GrantFiled: February 10, 2014Date of Patent: August 11, 2015Assignee: UCL Business PLCInventors: Paul Anthony Kirkby, K. M. naga Srinivas Nadella, Robin Angus Silver
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Patent number: 9069227Abstract: The invention is directed to an acousto-optic lens (AOL) and corresponding method. The AOL of the invention comprises a first and second acousto-optic deflector, each being arranged to support a respective acoustic wave. The AOL includes a driver for synthesizing first and second drive signals for the respective first and second acousto-optic deflectors. The driver is arranged to synthesize the drive signals so as to be phase-modulated by functions that can be expressed as a Taylor series having one or more coefficients greater than second order. The functions are preferably non-sinusoidal and have sufficient magnitude at the higher orders to effect one or more of fixed aberration correction, dynamic aberration correction and Z-scanning.Type: GrantFiled: April 13, 2012Date of Patent: June 30, 2015Assignee: UCL BUSINESS PLCInventors: Paul A. Kirkby, K. M. Naga Srinivas Nadella, R. Angus Silver
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Publication number: 20140153081Abstract: Methods, systems and apparatus for manipulating electromagnetic radiation such as laser beams. A method and apparatus for correcting magnification chromatic aberration utilises one or more dispersive lenses such that long wavelength components are magnified less than short wavelength components. A telecentric relay is preferred to achieve this aim. Further, the use of polarisers to block the undesired zeroth order components of diffraction emanating from acousto-optic deflectors (AODs) is disclosed. Furthermore, specific designs of AOD including narrow transducer AODs which produce a diverging acoustic wave and AODs having two transducers and a selection switch are disclosed.Type: ApplicationFiled: February 10, 2014Publication date: June 5, 2014Applicant: UCL Business PLCInventors: Paul Anthony Kirkby, K. M. naga Srinivas Nadella, Robin Angus Silver
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Patent number: 8687268Abstract: Methods, systems and apparatus for manipulating electromagnetic radiation such as laser beams. A method and apparatus for correcting magnification chromatic aberration utilizes one or more dispersive lenses such that long wavelength components are magnified less than short wavelength components. A telecentric relay is preferred to achieve this aim. Further, the use of polarizers to block the undesired zeroth order components of diffraction emanating from acousto-optic deflectors (AODs) is disclosed. Furthermore, specific designs of AOD including narrow transducer AODs which produce a diverging acoustic wave and AODs having two transducers and a selection switch are disclosed.Type: GrantFiled: September 14, 2012Date of Patent: April 1, 2014Assignee: UCL Business PLCInventors: Paul Anthony Kirkby, K. M. Naga Srinivas Nadella, Robin Angus Silver
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Publication number: 20140029081Abstract: The invention is directed to an acousto-optic lens (AOL) and corresponding method. The AOL of the invention comprises a first and second acousto-optic deflector, each being arranged to support a respective acoustic wave. The AOL includes a driver for synthesizing first and second drive signals for the respective first and second acousto-optic deflectors. The driver is arranged to synthesize the drive signals so as to be phase-modulated by functions that can be expressed as a Taylor series having one or more coefficients greater than second order. The functions are preferably non-sinusoidal and have sufficient magnitude at the higher orders to effect one or more of fixed aberration correction, dynamic aberration correction and Z-scanning.Type: ApplicationFiled: April 13, 2012Publication date: January 30, 2014Applicant: UCL BUSINESS PLCInventors: Paul A. Kirkby, K.M. Naga Srinivas Nadella, R. Angus Silver
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Publication number: 20130148188Abstract: Methods and apparatus for optimising, improving or maximising the efficiency of an acousto-optic lens (AOL) system are disclosed. Data relating to efficiency is used to select drive frequencies of the acousto-optic devices (AODs) forming the AOL, thereby both increasing the usable field of view and reducing a prior art patternation problem. Preferably according to the invention, drive frequencies are selected that maximise efficiency of transmission through the AOL. When scanning, the centre of each scan is optimised to be of maximum efficiency.Type: ApplicationFiled: April 20, 2011Publication date: June 13, 2013Applicant: UCL BUSINESS PLCInventors: Paul A. Kirkby, K.M. Naga Srinivas Nadella, R. Angus Silver
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Publication number: 20130057946Abstract: Methods, systems and apparatus for manipulating electromagnetic radiation such as laser beams. A method and apparatus for correcting magnification chromatic aberration utilises one or more dispersive lenses such that long wavelength components are magnified less than short wavelength components. A telecentric relay is preferred to achieve this aim. Further, the use of polarisers to block the undesired zeroth order components of diffraction emanating from acousto-optic deflectors (AODs) is disclosed. Furthermore, specific designs of AOD including narrow transducer AODs which produce a diverging acoustic wave and AODs having two transducers and a selection switch are disclosed.Type: ApplicationFiled: September 14, 2012Publication date: March 7, 2013Applicant: UCL Business PLCInventors: Paul Anthony Kirkby, Robin Angus Silver, K. M. Naga Srinivas Nadella
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Patent number: 8294977Abstract: Methods, systems and apparatus for manipulating electromagnetic radiation such as laser beams. A method and apparatus for correcting magnification chromatic aberration utilizes one or more dispersive lenses such that long wavelength components are magnified less than short wavelength components. A telecentric relay is preferred to achieve this aim. Further, the use of polarizers to block the undesired zeroth order components of diffraction emanating from acousto-optic deflectors (AODs) is disclosed. Furthermore, specific designs of AOD including narrow transducer AODs which produce a diverging acoustic wave and AODs having two transducers and a selection switch are disclosed.Type: GrantFiled: September 12, 2007Date of Patent: October 23, 2012Assignee: UCL Business PLCInventors: Paul Anthony Kirkby, Robin Angus Silver, K. M. Naga Srinivas Nadella
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Publication number: 20100328759Abstract: Methods, systems and apparatus for manipulating electromagnetic radiation such as laser beams. A method and apparatus for correcting magnification chromatic aberration utilises one or more dispersive lenses such that long wavelength components are magnified less than short wavelength components. A telecentric relay is preferred to achieve this aim. Further, the use of polarisers to block the undesired zeroth order components of diffraction emanating from acousto-optic deflectors (AODs) is disclosed. Furthermore, specific designs of AOD including narrow transducer AODs which produce a diverging acoustic wave and AODs having two transducers and a selection switch are disclosed.Type: ApplicationFiled: September 12, 2007Publication date: December 30, 2010Inventors: Paul Anthony Kirkby, Robin Angus Silver, K.M. Naga Srinivas Nadella