Patents by Inventor Pie-Yau Chien
Pie-Yau Chien 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: 20110299061Abstract: A distance measurement method for use in a laser range finding device to measure a distance between the laser range finding device and a target is disclosed. The method comprises the following steps. A laser signal is sent to the target in a first time point. A reflected laser signal reflected by the target is then received. A digital signal having a plurality of signal values ranging from 0 to N is obtained by sampling the reflected laser signal with a sampling signal, wherein N is an integer larger than two. A maximum signal value among the signal values is obtained. The distance is calculated according to the first time point and a second time point where the maximum signal value is generated.Type: ApplicationFiled: August 11, 2011Publication date: December 8, 2011Inventors: Yin-Long Luo, Sheng Liang, Peng-Fei Song, Pie-Yau Chien, Hua-Tang Liu
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Patent number: 8018580Abstract: A distance measurement method for use in a laser range finding device to measure a distance between the laser range finding device and a target is disclosed. The method comprises the following steps. A laser signal is sent to the target in a first time point. A reflected laser signal reflected by the target is then received. A digital signal having a plurality of signal values ranging from 0 to N is obtained by sampling the reflected laser signal with a sampling signal, wherein N is an integer larger than two. A maximum signal value among the signal values is obtained. The distance is calculated according to the first time point and a second time point where the maximum signal value is generated.Type: GrantFiled: September 20, 2010Date of Patent: September 13, 2011Assignee: Asia Optical Co., Inc.Inventors: Yin-Long Luo, Sheng Liang, Peng-Fei Song, Pie-Yau Chien, Hua-Tang Liu
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Publication number: 20110013173Abstract: A distance measurement method for use in a laser range finding device to measure a distance between the laser range finding device and a target is disclosed. The method comprises the following steps. A laser signal is sent to the target in a first time point. A reflected laser signal reflected by the target is then received. A digital signal having a plurality of signal values ranging from 0 to N is obtained by sampling the reflected laser signal with a sampling signal, wherein N is an integer larger than two. A maximum signal value among the signal values is obtained. The distance is calculated according to the first time point and a second time point where the maximum signal value is generated.Type: ApplicationFiled: September 20, 2010Publication date: January 20, 2011Inventors: Yin-Long Luo, Sheng Liang, Peng-Fei Song, Pie-Yau Chien, Hua-Tang Liu
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Patent number: 7800737Abstract: A distance measurement method for use in a laser range finding device to measure a distance between the laser range finding device and a target is disclosed. The method comprises the following steps. A laser signal is sent to the target in a first time point. A reflected laser signal reflected by the target is then received. A digital signal having a plurality of signal values ranging from 0 to N is obtained by sampling the reflected laser signal with a sampling signal, wherein N is an integer larger than two. A maximum signal value among the signal values is obtained. The distance is calculated according to the first time point and a second time point where the maximum signal value is generated.Type: GrantFiled: March 13, 2008Date of Patent: September 21, 2010Assignee: Asia Optical Co., Inc.Inventors: Yin-Long Luo, Sheng Liang, Peng-Fei Song, Pie-Yau Chien, Hua-Tang Liu
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Publication number: 20080316464Abstract: A distance measurement method for use in a laser range finding device to measure a distance between the laser range finding device and a target is disclosed. The method comprises the following steps. A laser signal is sent to the target in a first time point. A reflected laser signal reflected by the target is then received. A digital signal having a plurality of signal values ranging from 0 to N is obtained by sampling the reflected laser signal with a sampling signal, wherein N is an integer larger than two. A maximum signal value among the signal values is obtained. The distance is calculated according to the first time point and a second time point where the maximum signal value is generated.Type: ApplicationFiled: March 13, 2008Publication date: December 25, 2008Applicant: ASIA OPTICAL CO., INC.Inventors: Yin-Long Luo, Sheng Liang, Peng-Fei Song, Pie-Yau Chien, Hua-Tang Liu
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Patent number: 7395604Abstract: A laser level with temperature control device (2) and the temperature control method thereof are disclosed. The temperature control device includes a thermal insulation chamber (22), a thermoelectric cooler (25), a control unit (21), and first and second temperature sensors (23, 24). The second temperature sensor is received in the thermal insulation chamber together with a tilt sensor (12). The control unit controls operation of the thermoelectric cooler according to the external and internal temperature signals respectively output by the first and second temperature sensors, so as to adjust the internal temperature inside the thermal insulation chamber to be a calibration temperature point close to the external temperature. Accordingly, the temperature drift problem can be addressed, and the working temperature of the tilt sensor can be maintained in a stable range. Further, the acceptable ambient temperature range within which the tilt sensor works can be expanded.Type: GrantFiled: July 10, 2006Date of Patent: July 8, 2008Assignee: Asia Optical Co., Inc.Inventors: Pie-Yau Chien, Hua-Tang Liu, Yi-qi Li, Yong-ce Qi, Zhang-yong Jian, Yue-ye Chen
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Patent number: 7304727Abstract: A laser distance-measuring device includes a laser-transmitting portion, a laser-receiving portion, a coupling portion, an inclination-measuring portion, a signal-processing portion, and a display. The laser-transmitting portion emits a laser beam, and the laser-receiving portion receives the laser beam. The coupling portion interconnects the laser-receiving portion and the signal-processing portion. The inclination-measuring portion detects an inclination angle of the laser beam. The signal-processing portion processes the signals received from the laser-receiving portion and the inclination-measuring portion and sends the result to the display. The display receives and displays the result of processing by the signal-processing portion.Type: GrantFiled: November 29, 2005Date of Patent: December 4, 2007Assignee: Asia Optical Co., Inc.Inventors: Pie-Yau Chien, Hua-Tang Liu, Hui-Qing Chen, Shou-Qing Yang, Hai-Hua Chen, Liang Li, Han Lu, Peng-Fei Song
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Patent number: 7180583Abstract: An apparatus, which is for assisting in calibration of an optical axis of a light beam generated by a light emitter of an instrument, includes a body, a sensor module, and an indicator module. The instrument includes a sighting unit that has a specified position relationship with the light emitter. The body has a surface provided with a reference mark. The sensor module is mounted on the surface of the body, generates an output signal upon receipt of the light beam generated by the light emitter of the instrument, and has a reference position relationship with the reference mark. The reference position relationship corresponds to the specified position relationship between the sighting unit and the light emitter. The indicator module is associated operably with the sensor module, and indicates position of an incident light beam received by the sensor module.Type: GrantFiled: June 22, 2004Date of Patent: February 20, 2007Assignee: Asia Optical Co., Inc.Inventors: Pie-Yau Chien, Bing Sheng, Li-Ming Lin
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Publication number: 20060272167Abstract: A laser level with temperature control device (2) and the temperature control method thereof are disclosed. The temperature control device includes a thermal insulation chamber (22), a thermoelectric cooler (25), a control unit (21), and first and second temperature sensors (23, 24). The second temperature sensor is received in the thermal insulation chamber together with a tilt sensor (12). The control unit controls operation of the thermoelectric cooler according to the external and internal temperature signals respectively output by the first and second temperature sensors, so as to adjust the internal temperature inside the thermal insulation chamber to be a calibration temperature point close to the external temperature. Accordingly, the temperature drift problem can be addressed, and the working temperature of the tilt sensor can be maintained in a stable range. Further, the acceptable ambient temperature range within which the tilt sensor works can be expanded.Type: ApplicationFiled: July 10, 2006Publication date: December 7, 2006Applicant: Asia Optical Co., Inc.Inventors: Pie-Yau Chien, Hau-Tang Liu, Yi-qi Li, Yong-ce Qi, Zhang-yong Jian, Yue-ye Chen
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Publication number: 20060268261Abstract: A laser distance-measuring device includes a laser-transmitting portion, a laser-receiving portion, a coupling portion, an inclination-measuring portion, a signal-processing portion, and a display. The laser-transmitting portion emits a laser beam, and the laser-receiving portion receives the laser beam. The coupling portion interconnects the laser-receiving portion and the signal-processing portion. The inclination-measuring portion detects an inclination angle of the laser beam. The signal-processing portion processes the signals received from the laser-receiving portion and the inclination-measuring portion and sends the result to the display. The display receives and displays the result of processing by the signal-processing portion.Type: ApplicationFiled: November 29, 2005Publication date: November 30, 2006Inventors: Pie-Yau Chien, Hua-Tang Liu, Hui-Qing Chen, Shou-Qing Yang, Hai-Hua Chen, Liang Li, Han Lu, Peng-Fei Song
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Patent number: 7046345Abstract: An apparatus for precise distance measurement has a multiple frequency generator, a laser transmitter, an optical receiver, a first measuring unit, a second measuring unit and a central processing unit. The laser transmitter outputs a light signal to a target, and the optical receiver receives the reflected light signal and mixes the base frequency signal from the multiple frequency generator and the reflected light signal and further outputs an measurement signal to the first and second measuring units. The first and second measuring units calculate respectively a time difference and a phase difference between the light signal and the reflected light signal. The central processing unit is connected to the first and second measuring units to calculate a precise distance by the time and the phase difference.Type: GrantFiled: January 12, 2004Date of Patent: May 16, 2006Assignee: Asia Optical Co., Inc.Inventors: Pie-Yau Chien, Dong Huang, Kuo-Hua Yang, Dan Duan
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Publication number: 20050195410Abstract: An apparatus, which is for assisting in calibration of an optical axis of a light beam generated by a light emitter of an instrument, includes a body, a sensor module, and an indicator module. The instrument includes a sighting unit that has a specified position relationship with the light emitter. The body has a surface provided with a reference mark. The sensor module is mounted on the surface of the body, generates an output signal upon receipt of the light beam generated by the light emitter of the instrument, and has a reference position relationship with the reference mark. The reference position relationship corresponds to the specified position relationship between the sighting unit and the light emitter. The indicator module is associated operably with the sensor module, and indicates position of an incident light beam received by the sensor module.Type: ApplicationFiled: June 22, 2004Publication date: September 8, 2005Inventors: Pie-Yau Chien, Bing Sheng, Li-Ming Lin
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Publication number: 20050184221Abstract: An optical power meter including a photodiode and an amplifier circuit is provided. The photodiode is for generating a current based on the power of a light beam incidents thereon. The amplifier circuit is for converting the current into a voltage and includes an amplifier, a capacitor, a plurality of resistors and a relay. The amplifier includes an inverting input terminal and an output terminal. The capacitor has a first terminal connected with the inverting input terminal and a second terminal connected with the output terminal. Each of the plurality of resistors has a first terminal connected with the inverting input terminal. The relay has a first terminal connected with the output terminal. The relay selectively connects one of the resistors with the output terminal so that the value of the voltage outputted by the output terminal is within a predetermined range. The on-resistance of the relay is not larger than 10 ?.Type: ApplicationFiled: January 12, 2005Publication date: August 25, 2005Inventors: Pie-Yau Chien, Xiao-Yong Wang
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Publication number: 20050173058Abstract: A method for bonding flat glasses that adjusts proper conditions of bonding surfaces of the flat glasses and then compresses the flat glasses until two flat glasses bind by Ven Der Wall's interaction, an inherent interaction between molecules, to achieve a combined lens assembly. Moreover, heating may be used in the bonding method to decrease time for bonding the flat glasses and to enhance bonding strength. The combined lens assembly is simply bonded by molecular interaction without any adhesive or cohesive solution used in conventional bonding techniques.Type: ApplicationFiled: February 10, 2004Publication date: August 11, 2005Inventors: Pie-Yau Chien, Jin-Teng Lin
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Publication number: 20050151956Abstract: An apparatus for precise distance measurement has a multiple frequency generator, a laser transmitter, an optical receiver, a first measuring unit, a second measuring unit and a central processing unit. The laser transmitter outputs a light signal to a target, and the optical receiver receives the reflected light signal and mixes the base frequency signal from the multiple frequency generator and the reflected light signal and further outputs an measurement signal to the first and second measuring units. The first and second measuring units calculate respectively a time difference and a phase difference between the light signal and the reflected light signal. The central processing unit is connected to the first and second measuring units to calculate a precise distance by the time and the phase difference.Type: ApplicationFiled: January 12, 2004Publication date: July 14, 2005Inventors: Pie-Yau Chien, Dong Huang, Kuo-Hua Yang, Dan Duan
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Patent number: 6854900Abstract: A method of fabricating a WDM unit consists of attaching a first and a second GRIN lenses to opposite faces of a WDM filter. A dual fiber pigtail and a single fiber pigtail are mounted in corresponding glass tubes. The glass tube with the dual fiber pigtail and the glass tube with the single fiber pigtail are mounted on the second GRIN lens and the first GRIN lens respectively. The position of the dual fiber pigtail and the single fiber pigtail are adjusted with respect to the second GRIN lens and the first GRIN lens respectively to obtain the best optical property. The invention prevents the WDM filter from tilting during temperature variation by sandwiching the WDM filter in between the two GRIN lenses, and further prevents the WDM unit from increasing the reflection loss and insertion loss.Type: GrantFiled: July 16, 2002Date of Patent: February 15, 2005Assignee: Asia Optical Co., Inc.Inventors: I-Jen Lai, Pie-Yau Chien, Chin-Hsiang Wang, Yu-Ting Lee, Tsung-Yueh Tsai, Chih-Hsien Lin
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Patent number: 6717656Abstract: The present invention is a method and an apparatus of a laser range detector, a delay circuit is comprised for generating a plurality of delay signals. With the delay signal, the precision of detecting could be improved without faster clock signals or higher power consumption.Type: GrantFiled: March 28, 2002Date of Patent: April 6, 2004Assignee: Asian Optical Co. Ltd.Inventors: Pie-Yau Chien, Chia-Jung Wu
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Publication number: 20030234869Abstract: A camera for measuring the distance to an object is combined with a laser range measuring device by using a beam splitting device so as to simultaneously take the image of the object and measure the distance between the camera and the object. Using the focal length of the lens, the width and height of the image on the image detector, and the distance between the camera and the object, it is then possible to compute the width and height of the object according to the geometrical optics. By means of obtaining the speed of the image moving on the image detector, the camera of the invention further computes the speed of the object which is projected on a plane perpendicular to the optical axis of the lens.Type: ApplicationFiled: June 21, 2002Publication date: December 25, 2003Applicant: Asian Optical Co., Inc.Inventors: Chih-Hui Chen, Lung-Pin Chung, Hua-Tang Liu, Te-Wei Liu, Jui-Feng Huang, Chin-Wei Hung, Chih-Hsiang Lin, Hsin-Feng Lee, Charles Liou, Pie-Yau Chien
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Publication number: 20030185507Abstract: A method of fabricating a WDM unit consists of attaching a first and a second GRIN lenses to opposite faces of a WDM filter. A dual fiber pigtail and a single fiber pigtail are mounted in corresponding glass tubes. The glass tube with the dual fiber pigtail and the glass tube with the single fiber pigtail are mounted on the second GRIN lens and the first GRIN lens respectively. The position of the dual fiber pigtail and the single fiber pigtail are adjusted with respect to the second GRIN lens and the first GRIN lens respectively to obtain the best optical property. The invention prevents the WDM filter from tilting during temperature variation by sandwiching the WDM filter in between the two GRIN lenses, and further prevents the WDM unit from increasing the reflection loss and insertion loss.Type: ApplicationFiled: July 16, 2002Publication date: October 2, 2003Inventors: I-Jen Lai, Pie-Yau Chien, Chin-Hsiang Wang, Yu-Ting Lee, Tsung-Yueh Tsai, Chih-Hsien Lin
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Publication number: 20030152116Abstract: The present invention provides a power-equalizing multi-channel fiber laser array, which comprises a pumping laser source, a 1×N ratio splitter, a plurality of WDM couplers, some pieces of EDFs, some pieces of fiber grating pairs, and a power-equalizing device (which may include variable optical attenuators). The power-equalization approach is realized by: (1) adding in some variable optical attenuators; (2) controlling the pumping power ratio to the individual channels by a 1×N variable ratio splitter; (3) adjusting the fiber lengths or the Er3+ concentration; or (4) adjusting the fiber gratings reflectivity.Type: ApplicationFiled: February 12, 2002Publication date: August 14, 2003Inventors: Hsien-Kuei Liao, Pie-Yau Chien, Hong-Yih Tseng, Sien Chi