Patents by Inventor Cornelius Antonius Hezemans
Cornelius Antonius Hezemans 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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Patent number: 9131846Abstract: An optical scanning probe assembly for microscopic guide optic scanning and inspection of tissues includes an outer housing having a spring element for a scanning motor. The spring element is formed as a hollow tube configured to receive an optical guide, where the hollow tube has a mechanical stiffness larger than the optical guide to be received. The assembly further includes a lens system and a deflector configured to deflect the distal end of the hollow tube in directions transverse to the longitudinal extension of the hollow tube, so as to form an optical scan pattern.Type: GrantFiled: October 19, 2009Date of Patent: September 15, 2015Assignee: Koninklijke Philips N.V.Inventors: Franciscus Martinus Antonius Maria Van Gaal, Bernardus Hendrikus Wilhelmus Hendriks, Augustinus Laurentius Braun, Cornelius Antonius Hezemans, Waltherus Cornelis Jozef Bierhoff
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Patent number: 9036140Abstract: An optical probe system having a probe with an optical guide (G) having a distal end. The optical guide (G) is mounted inside a housing (H) so that the distal end is displaceable with respect to the housing (H). A set of actuators (A), e.g. electromagnetic drive coils, can displace the distal end by application of a drive signal (Vx, Vy). A control unit (CU) generates the drive signal (Vx, Vy) so as to provide a scanning frequency which varies according to an amplitude of the drive signal (Vx, Vy). With such probe system it is possible to scan a field of view with a scanning frequency that varies with the scanning radius. Taking into account the maximum allowable drive current, it is possible to increase scanning speed compared to scanning at the mechanical resonance frequency of the optical system, since small radii can be scanned at a high scanning frequency.Type: GrantFiled: September 10, 2010Date of Patent: May 19, 2015Assignee: Koninklijke Philips N.V.Inventors: Nenad Mihajlovic, Jeroen Jan Lambertus Horikx, Waltherus Cornelis Jozef Bierhoff, Cornelius Antonius Hezemans, Bernardus Hendrikus Wilhelmus Hendriks
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Patent number: 8742384Abstract: An optical system for detecting light from a 2D area of a sample (36) comprises a collection lens (34) for collecting light from a collection region of the sample. A light detector (44) is positionally fixed with respect to the sample, and a reflector arrangement (61) directs collected light to the detector. The reflector arrangement comprises movable components and the collection lens (34) is movable relative to the sample. The collection lens and the movable components are configurable to define different collection regions, and the movement of the components effects a direction of the light from the collection region to a substantially unchanged area of the light detector (44). This arrangement avoids the need for a bulky detector in order to detect signals from a 2D sample area formed by scanning across the sample.Type: GrantFiled: May 18, 2009Date of Patent: June 3, 2014Assignee: Koninklijke Philips N.V.Inventors: Erik Martinus Hubertus Petrus Van Dijk, Cornelius Antonius Hezemans
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Patent number: 8717654Abstract: The present invention relates to an optical probe (1) suitable for miniature applications. An example application is a fiber-based confocal miniaturized microscope. The optical probe comprises a coil-based actuation system (9, 10) comprising drive coils (9) capable of displacing the distal end (3) of an optical guide (2) housed (4) by the optical probe. The probe makes use of a feedback loop which alternate between driving the displacement of the optical guide by driving a current through the drive coils and switching off the current through the drive coils, and while the drive current being switched off, measure the speed of the distal end of the optical guide. The measured speed is compared to the set-point speed, and if a difference is detected, the drive current is adjusted to eliminate, or at least bring down, this difference.Type: GrantFiled: May 10, 2010Date of Patent: May 6, 2014Assignee: Koninklijke Philips N.V.Inventors: Cornelius Antonius Hezemans, Bernardus Hendrikus Wilhelmus Hendriks, Waltherus Cornelis Jozef Bierhoff, Augustinus Laurentius Braun, Nenad Mihajlovic
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Publication number: 20120170030Abstract: An optical probe system having a probe with an optical guide (G) having a distal end. The optical guide (G) is mounted inside a housing (H) so that the distal end is displaceable with respect to the housing (H). A set of actuators (A), e.g. electromagnetic drive coils, can displace the distal end by application of a drive signal (Vx, Vy). A control unit (CU) generates the drive signal (Vx, Vy) so as to provide a scanning frequency which varies according to an amplitude of the drive signal (Vx, Vy). With such probe system it is possible to scan a field of view with a scanning frequency that varies with the scanning radius. Taking into account the maximum allowable drive current, it is possible to increase scanning speed compared to scanning at the mechanical resonance frequency of the optical system, since small radii can be scanned at a high scanning frequency.Type: ApplicationFiled: September 10, 2010Publication date: July 5, 2012Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Nenad Mihajlovic, Jeroen Jan Lambertus Horikx, Waltherus Cornelis Jozef Bierhoff, Cornelius Antonius Hezemans, Bernardus Hendrikus Wilhelmus Hendriks
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Publication number: 20120113491Abstract: The present invention relates to an optical probe (1) suitable for miniature applications. An example application is a fibre-based confocal miniaturized microscope. The optical probe comprises a coil-based actuation system (9, 10) comprising drive coils (9) capable of displacing the distal end (3) of an optical guide (2) housed (4) by the optical probe. The probe makes use of a feedback loop which alternate between driving the displacement of the optical guide by driving a current through the drive coils and switching off the current through the drive coils, and while the drive current being switched off, measure the speed of the distal end of the optical guide. The measured speed is compared to the set-point speed, and if a difference is detected, the drive current is adjusted to eliminate, or at least bring down, this difference.Type: ApplicationFiled: May 10, 2010Publication date: May 10, 2012Applicant: Koninklijke Philips Electronics N.V.Inventors: Cornelius Antonius Hezemans, Bernardus Hendrikus Wilhelmus Hendriks, Waltherus Cornelis Jozef Bierhoff, Augustinus Laurentius Braun, Nenad Mihajlovic
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Publication number: 20110201941Abstract: The present invention relates to an optical scanning probe assembly for microscopic guide optic scanning and inspection of tissues suitable for application in, e.g. in vivo medical inspection and biopsy. The assembly comprises an outer housing (3) comprising: i) a spring element for a scanning motor, the spring element formed as a hollow tube (5) adapted to receive an optical guide, the hollow tube having mechanical stiffness larger than the optical guide to be received, ii) a lens system (7) and iii) N means for deflecting (6) the distal end of the hollow tube in directions transverse to the longitudinal extension of the hollow tube, so as to form an optical scan pattern. The optical assembly is particularly advantageous as it increases the freedom to optimize the optical and mechanical performance of the system which is defined respectively by the optical guide and by the hollow tube. The probe can be used in resonant and non-resonant scanning modes.Type: ApplicationFiled: October 19, 2009Publication date: August 18, 2011Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Franciscus Martinus Antonius Maria Van Gaal, Bernardus Hendrikus Wilhelmus Hendriks, Augustinus Laurentius Braun, Cornelius Antonius Hezemans, Waltherus Cornelis Jozef Bierhoff
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Publication number: 20110068260Abstract: An optical system for detecting light from a 2D area of a sample (36) comprises a collection lens (34) for collecting light from a collection region of the sample. A light detector (44) is positionally fixed with respect to the sample, and a reflector arrangement (61) directs collected light to the detector. The reflector arrangement comprises movable components and the collection lens (34) is movable relative to the sample. The collection lens and the movable components are configurable to define different collection regions, and the movement of the components effects a direction of the light from the collection region to a substantially unchanged area of the light detector (44). This arrangement avoids the need for a bulky detector in order to detect signals from a 2D sample area formed by scanning across the sample.Type: ApplicationFiled: May 18, 2009Publication date: March 24, 2011Applicant: Koninklijke Philips Electronics N.V.Inventors: Erik Martinus Hubertus Petrus Van Dijk, Cornelius Antonius Hezemans
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Patent number: 7773466Abstract: The invention relates to a tray mechanism consisting of sliding means comprising an electrical tray motor, for moving a tray—provided for containing a disc (for example an optical disc) on which information is recorded—from a projected position, for the placement of the disc or its discharge, to a contained one, for the reproduction of recorded information, or reciprocally, and a drive power source, for supplying an applied voltage to said tray motor. Control means supply different values of the voltage applied to the tray motor according to different mechanical functions controlled by said motor.Type: GrantFiled: January 30, 2004Date of Patent: August 10, 2010Assignee: Koninklijke Philips Electronics N.V.Inventors: Cornelius Antonius Hezemans, Hendrikus Albertus Looijmans
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Publication number: 20100145538Abstract: The present invention relates to a method of limiting a power supply current in a system comprising a power supply (10), a motor (12) operating at different speeds, a driver (14) for driving the motor and a controller (16) for controlling the driver, the method comprising the steps of: specifying a first value that is related to a maximum power supply current (IPSmax); determining a second value that is related to an electromagnetic force-dependent voltage (VEMF) of the motor; determining a desired third value (Cdes) that is related to a desired motor current (IMdes); determining a first boundary value (a) and a second boundary value (b) for the third value, taking into account the first value and the second value; comparing the boundary values (a) and (b) to the third value (Cdes); and setting the third value in dependence on the result of the comparing stepType: ApplicationFiled: March 16, 2006Publication date: June 10, 2010Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.Inventors: Hendrikus Albertus. Johanna Looijmans, Cornelius Antonius Hezemans
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Patent number: 7683559Abstract: The present invention relates to a method of recovering energy from the turntable motor (12) in an optical disc drive comprising a power supply and a circuitry (10) that is capable of selectively feeding a current from the power supply into the motor in a first state and from the motor into the power supply in a second state, the method comprising the steps of: decelerating the motor, during decelerating the motor, repeatedly calculating a ratio between a duration of the first state and a duration of the second state in dependence on an angular velocity of the motor, such that a current integrated over the whole decelerating process is fed from the motor into the power supply, and after calculating the ratio, selecting the duration of the first state and the duration of the second state in accordance with the calculated ratio. The present invention further relates to an optical device.Type: GrantFiled: July 6, 2006Date of Patent: March 23, 2010Assignee: Koninklijke Philips Electronics N.V.Inventors: Hendrikus Albertus Johanna Looijmans, Cornelius Antonius Hezemans, Joop Van Bijnen
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Publication number: 20080218106Abstract: The present invention relates to a method of recovering energy from the turntable motor (12) in an optical disc drive comprising a power supply and a circuitry (10) that is capable of selectively feeding a current from the power supply into the motor in a first state and from the motor into the power supply in a second state, the method comprising the steps of: decelerating the motor, during decelerating the motor, repeatedly calculating a ratio between a duration of the first state and a duration of the second state in dependence on an angular velocity of the motor, such that a current integrated over the whole decelerating process is fed from the motor into the power supply, and after calculating the ratio, selecting the duration of the first state and the duration of the second state in accordance with the calculated ratio. The present invention further relates to an optical device.Type: ApplicationFiled: July 6, 2006Publication date: September 11, 2008Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.Inventors: Hendrikus Albertus Johanna Looijmans, Cornelius Antonius Hezemans, Joop Van Bijnen
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Patent number: 7224654Abstract: An optical disc drive apparatus (1) comprises: rotating means (4) for rotating an optical disc (2); a sledge (10) radially displaceable with respect to an apparatus frame (3); a platform (20) radially displaceable with respect to said sledge (10); an optical system (30) for scanning a disc, the optical system (30) defining an optical path (80) which is substantially fixed with respect to the sledge (10) and comprising an optical element (34) which is fixed with respect to the platform (20); an optical detector (35) fixed to said sledge (10); vibration detection means for detecting vibrations caused by the rotating disc; said vibration detection means comprising radial displacement detection means for detecting a radial displacement of said platform (20) with respect to said sledge (10).Type: GrantFiled: July 10, 2003Date of Patent: May 29, 2007Assignee: Koninklijke Philips Electronics N.V.Inventors: Hendrikus Albertus Johanna Looijmans, Cornelius Antonius Hezemans