A novel detection method is suggested using magnetic sensor to detect the short-defect line on LCD-TFT panel. With the voltage applied to the TFT panel, current flows along the short-defect line generating magnetic field around it. By scanning the magnetic sensor across the TFT panel, the defect line can be detected. Vision inspection is performed along the detected line to find out the defect point. Three main types of short-defects on TFT panel are tested and their locations are successfully detected by the suggested method.
{"title":"A novel line detection method using magnetic sensor for the optical inspection of electrical short defects on TFT LCD","authors":"Il-Han Hwang, Hee-Gu Yang, Sang-Su Choi, Seong-Yeol Lee, Chang-Wook Jeong, DaeHwa Jeong","doi":"10.1109/ISOT.2009.5326084","DOIUrl":"https://doi.org/10.1109/ISOT.2009.5326084","url":null,"abstract":"A novel detection method is suggested using magnetic sensor to detect the short-defect line on LCD-TFT panel. With the voltage applied to the TFT panel, current flows along the short-defect line generating magnetic field around it. By scanning the magnetic sensor across the TFT panel, the defect line can be detected. Vision inspection is performed along the detected line to find out the defect point. Three main types of short-defects on TFT panel are tested and their locations are successfully detected by the suggested method.","PeriodicalId":366216,"journal":{"name":"2009 International Symposium on Optomechatronic Technologies","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132080561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-11-10DOI: 10.1109/ISOT.2009.5326091
Cheol Song, MyoungKi Ahn, D. Gweon, Hyungsuck Cho
We have designed the spectral domain optical coherence tomography system using a broadband superluminescent diode laser source and home-built spectrometer, which acquires 2D or 3D images with high speed and high resolution. We have also introduced the N-point complex FFT algorithm, which is faster than 2N point real FFT, into the signal processing part, thus shortening signal processing time after image data acquisition. For the sake of convenient measurements, the spectral domain optical coherence tomography was manufactured in the form of a microscope. The volumetric image of a mouse anterior eye could be reconstructed from a few hundred 2D images.
{"title":"High-resolution high-speed spectral domain optical coherence tomography","authors":"Cheol Song, MyoungKi Ahn, D. Gweon, Hyungsuck Cho","doi":"10.1109/ISOT.2009.5326091","DOIUrl":"https://doi.org/10.1109/ISOT.2009.5326091","url":null,"abstract":"We have designed the spectral domain optical coherence tomography system using a broadband superluminescent diode laser source and home-built spectrometer, which acquires 2D or 3D images with high speed and high resolution. We have also introduced the N-point complex FFT algorithm, which is faster than 2N point real FFT, into the signal processing part, thus shortening signal processing time after image data acquisition. For the sake of convenient measurements, the spectral domain optical coherence tomography was manufactured in the form of a microscope. The volumetric image of a mouse anterior eye could be reconstructed from a few hundred 2D images.","PeriodicalId":366216,"journal":{"name":"2009 International Symposium on Optomechatronic Technologies","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116524219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-11-10DOI: 10.1109/ISOT.2009.5326108
Alexander Hoink, K. Meiners-Hagen, O. Jusko, A. Abou-Zeid
A new interferometric measurement technique for form measurements of cylindrical objects with diameters up to 2.5 mm is presented. This technique provides a contactless and non-scanning form measurement of reflective cylinders with a resolution in the nanometre range. The specimen is placed in the centre of an inverse conic mirror and is illuminated by a diode laser. The reflected light is superposed under a slight angle with a reference beam and imaged on a CCD camera. From the recorded interferogram the surface topography of the specimen can be derived by a spatial phase shifting algorithm. The measurement range can be varied from the nanometre to the micrometre range by using three lasers with different wavelengths. Results of form measurements of different samples are presented and discussed.
{"title":"Form measurement of thin cylinders using three-wavelength interferometry","authors":"Alexander Hoink, K. Meiners-Hagen, O. Jusko, A. Abou-Zeid","doi":"10.1109/ISOT.2009.5326108","DOIUrl":"https://doi.org/10.1109/ISOT.2009.5326108","url":null,"abstract":"A new interferometric measurement technique for form measurements of cylindrical objects with diameters up to 2.5 mm is presented. This technique provides a contactless and non-scanning form measurement of reflective cylinders with a resolution in the nanometre range. The specimen is placed in the centre of an inverse conic mirror and is illuminated by a diode laser. The reflected light is superposed under a slight angle with a reference beam and imaged on a CCD camera. From the recorded interferogram the surface topography of the specimen can be derived by a spatial phase shifting algorithm. The measurement range can be varied from the nanometre to the micrometre range by using three lasers with different wavelengths. Results of form measurements of different samples are presented and discussed.","PeriodicalId":366216,"journal":{"name":"2009 International Symposium on Optomechatronic Technologies","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129501069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-11-10DOI: 10.1109/ISOT.2009.5326063
O. Ergeneman, M. Suter, G. Chatzipirpiridis, J. Zurcher, S. Graf, S. Pané, C. Hierold, B. Nelson
Magnetic polymer microactuators made of SU-8 and superparamagnetic nanoparticles are reported. Homogenous distribution of nanoparticles in the composite was obtained using superparamagnetic nanoparticles and a surfactant. The magnetic polymer composite (MPC) was micromachined into cantilevers using photolithography. The magnetic characterization of the MPC was performed by a superconducting quantum interference device (SQUID). An electromagnet applied magnetic forces to this composite. The force per volume of composite was determined experimentally by measuring the force on a film of MPC using a micro-force sensor. The cantilevers were excited with an AC electromagnet at different frequencies, and their resonance modes were captured by a laser-Doppler vibrometer. Deflections were increased about 10 times by the addition of a DC field. The tip deflection amplitude of a cantilever (160 µm x 1.65 µm) in resonance was found to be 63 nm at 15.78kHz.
报道了由SU-8和超顺磁性纳米颗粒制成的磁性聚合物微致动器。利用超顺磁性纳米颗粒和表面活性剂，获得了纳米颗粒在复合材料中的均匀分布。采用光刻技术将磁性聚合物复合材料(MPC)微机械加工成悬臂梁。利用超导量子干涉器件(SQUID)对MPC进行了磁性表征。电磁铁对这种复合材料施加磁力。利用微力传感器测量MPC薄膜上的作用力，实验确定了复合材料的单位体积作用力。用交流电磁铁在不同频率下激发悬臂梁，用激光多普勒振动计捕捉其共振模式。加入直流电场后，偏转量增加了约10倍。悬臂梁(160 μ m x 1.65 μ m)在15.78kHz时的尖端挠度幅值为63 nm。
{"title":"Characterization and actuation of a magnetic photosensitive polymer cantilever","authors":"O. Ergeneman, M. Suter, G. Chatzipirpiridis, J. Zurcher, S. Graf, S. Pané, C. Hierold, B. Nelson","doi":"10.1109/ISOT.2009.5326063","DOIUrl":"https://doi.org/10.1109/ISOT.2009.5326063","url":null,"abstract":"Magnetic polymer microactuators made of SU-8 and superparamagnetic nanoparticles are reported. Homogenous distribution of nanoparticles in the composite was obtained using superparamagnetic nanoparticles and a surfactant. The magnetic polymer composite (MPC) was micromachined into cantilevers using photolithography. The magnetic characterization of the MPC was performed by a superconducting quantum interference device (SQUID). An electromagnet applied magnetic forces to this composite. The force per volume of composite was determined experimentally by measuring the force on a film of MPC using a micro-force sensor. The cantilevers were excited with an AC electromagnet at different frequencies, and their resonance modes were captured by a laser-Doppler vibrometer. Deflections were increased about 10 times by the addition of a DC field. The tip deflection amplitude of a cantilever (160 µm x 1.65 µm) in resonance was found to be 63 nm at 15.78kHz.","PeriodicalId":366216,"journal":{"name":"2009 International Symposium on Optomechatronic Technologies","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129033175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-11-10DOI: 10.1109/ISOT.2009.5326113
Jae-Young Joo, Sun-Kyu Lee, Chang Seog Kang, Soon-Sub Park
Light-emitting diodes (LEDs) have begun to penetrate the traditional lighting industry and have left a profound impact on the illumination of thin and portable personnel telecommunication devices. Aside from this, LEDs can also be used in the design of visible optical wireless communication systems. In lighting applications, Surface Mount Device (SMD) LEDs play an important role; however, their low light flux brought about by the large viewing angle should be redistributed to increase luminescence and the communication range in communication applications. For this reason, the current study issue in this application is how to achieve a long data transmission range while dramatically reducing the overall system size for use in thin electronic products. This work presents a proposed design of an ultra-thin secondary lens for visible light communication based on white LEDs. The accurate physical modeling of a chip die and its package can make ray-trace simulation a powerful tool in predicting power distribution of the SMD LEDs in the near-field. To verify the proposed method, modeled ray data was compared with measured data. While relaxing several design constraints, the secondary light colliminator was carried out with a solution of a central refractive aspheric surface and an outer reflective surface. The optical performance of the modeled LEDs was very similar to the real one. The designed lens reduced the viewing angle of white SMD LEDs from 120° to 20° in FWHM. The proposed lens is extremely compact and efficient and is a good starting point in achieving an effective design of visible light communication between personnel telecommunication devices.
{"title":"Design of an ultra thin secondary lens for visible light communication based on a white LED","authors":"Jae-Young Joo, Sun-Kyu Lee, Chang Seog Kang, Soon-Sub Park","doi":"10.1109/ISOT.2009.5326113","DOIUrl":"https://doi.org/10.1109/ISOT.2009.5326113","url":null,"abstract":"Light-emitting diodes (LEDs) have begun to penetrate the traditional lighting industry and have left a profound impact on the illumination of thin and portable personnel telecommunication devices. Aside from this, LEDs can also be used in the design of visible optical wireless communication systems. In lighting applications, Surface Mount Device (SMD) LEDs play an important role; however, their low light flux brought about by the large viewing angle should be redistributed to increase luminescence and the communication range in communication applications. For this reason, the current study issue in this application is how to achieve a long data transmission range while dramatically reducing the overall system size for use in thin electronic products. This work presents a proposed design of an ultra-thin secondary lens for visible light communication based on white LEDs. The accurate physical modeling of a chip die and its package can make ray-trace simulation a powerful tool in predicting power distribution of the SMD LEDs in the near-field. To verify the proposed method, modeled ray data was compared with measured data. While relaxing several design constraints, the secondary light colliminator was carried out with a solution of a central refractive aspheric surface and an outer reflective surface. The optical performance of the modeled LEDs was very similar to the real one. The designed lens reduced the viewing angle of white SMD LEDs from 120° to 20° in FWHM. The proposed lens is extremely compact and efficient and is a good starting point in achieving an effective design of visible light communication between personnel telecommunication devices.","PeriodicalId":366216,"journal":{"name":"2009 International Symposium on Optomechatronic Technologies","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125289085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-11-10DOI: 10.1109/ISOT.2009.5326047
Massimo Fierro, Ho-Gun Ha, Yeong-Ho Ha
Color correction indicates the process of changing the colors of a digital image in order to reach given objectives. Usually the criteria under which color correction is performed match those of white-balancing and color constancy. In this work we present and automatic color correction method inspired by the Retinex and opponent colors theories with theoretical applicability on images with multiple illuminants. The method here presented has been tested in the field of skin tone color correction.
{"title":"An automatic color correction method inspired by the retinex and opponent colors theories","authors":"Massimo Fierro, Ho-Gun Ha, Yeong-Ho Ha","doi":"10.1109/ISOT.2009.5326047","DOIUrl":"https://doi.org/10.1109/ISOT.2009.5326047","url":null,"abstract":"Color correction indicates the process of changing the colors of a digital image in order to reach given objectives. Usually the criteria under which color correction is performed match those of white-balancing and color constancy. In this work we present and automatic color correction method inspired by the Retinex and opponent colors theories with theoretical applicability on images with multiple illuminants. The method here presented has been tested in the field of skin tone color correction.","PeriodicalId":366216,"journal":{"name":"2009 International Symposium on Optomechatronic Technologies","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115382661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-11-10DOI: 10.1109/ISOT.2009.5326040
S. Cho, Hyuk-Hoon Shim, Jong-Hyeong Kim, Chun-Sam Song, Joon Hyun Kim, Won-Jong Joo
X-ray images are heavily affected by noise which makes normal image processing not workable. This paper suggested a new method to identify the primary 3-D shape of an embedded object and its pose by using only single X-ray image. The image feature consists of corner points and edge/intersection lines of adjacent surfaces. The intensity of an X-ray image is attenuated exponentially with increasing the penetration thickness. The main finding is to model a precise exponential relationship to fit the variation of X-ray image intensity. It applied a least-square-method to the X-ray projection image and effectively extracted edges and intersection lines from the noise of X-ray image.
{"title":"Development of 3-D shapes estimation by using single X-ray image","authors":"S. Cho, Hyuk-Hoon Shim, Jong-Hyeong Kim, Chun-Sam Song, Joon Hyun Kim, Won-Jong Joo","doi":"10.1109/ISOT.2009.5326040","DOIUrl":"https://doi.org/10.1109/ISOT.2009.5326040","url":null,"abstract":"X-ray images are heavily affected by noise which makes normal image processing not workable. This paper suggested a new method to identify the primary 3-D shape of an embedded object and its pose by using only single X-ray image. The image feature consists of corner points and edge/intersection lines of adjacent surfaces. The intensity of an X-ray image is attenuated exponentially with increasing the penetration thickness. The main finding is to model a precise exponential relationship to fit the variation of X-ray image intensity. It applied a least-square-method to the X-ray projection image and effectively extracted edges and intersection lines from the noise of X-ray image.","PeriodicalId":366216,"journal":{"name":"2009 International Symposium on Optomechatronic Technologies","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127858941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-11-10DOI: 10.1109/ISOT.2009.5326055
M. Gohlke, T. Schuldt, D. Weise, U. Johann, A. Peters, C. Braxmaier
The gravitational wave detector LISA utilizes as current baseline a high sensitivity Optical Readout (ORO) for measuring the relative position and tilt of a free flying proof mass with respect to the satellite housing. The required sensitivities in the frequency band from 30 µHz to 1 Hz are in the picometer range for the translation and in the nanoradiant range for the tilt measurement. EADS Astrium, in collaboration with the Humboldt University Berlin and the University of Applied Sciences Konstanz, has realized a prototype ORO over the past years. The interferometer is based on a highly symmetric design where both, measurement and reference beam have a similar optical pathlength, and the same frequency and polarization. The technique of differential wavefront sensing (DWS) for tilt measurement is implemented. With our setup noise levels below 5pm/√HZ for translation and below 10nrad/√Hz for tilt measurements-both for frequencies above 10mHz-were demonstrated. We give an overview over the experimental setup, its current performance and the planned improvements.
{"title":"A high precision heterodyne interferometer for relative and absolute displacement measurement","authors":"M. Gohlke, T. Schuldt, D. Weise, U. Johann, A. Peters, C. Braxmaier","doi":"10.1109/ISOT.2009.5326055","DOIUrl":"https://doi.org/10.1109/ISOT.2009.5326055","url":null,"abstract":"The gravitational wave detector LISA utilizes as current baseline a high sensitivity Optical Readout (ORO) for measuring the relative position and tilt of a free flying proof mass with respect to the satellite housing. The required sensitivities in the frequency band from 30 µHz to 1 Hz are in the picometer range for the translation and in the nanoradiant range for the tilt measurement. EADS Astrium, in collaboration with the Humboldt University Berlin and the University of Applied Sciences Konstanz, has realized a prototype ORO over the past years. The interferometer is based on a highly symmetric design where both, measurement and reference beam have a similar optical pathlength, and the same frequency and polarization. The technique of differential wavefront sensing (DWS) for tilt measurement is implemented. With our setup noise levels below 5pm/√HZ for translation and below 10nrad/√Hz for tilt measurements-both for frequencies above 10mHz-were demonstrated. We give an overview over the experimental setup, its current performance and the planned improvements.","PeriodicalId":366216,"journal":{"name":"2009 International Symposium on Optomechatronic Technologies","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125279295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-11-10DOI: 10.1109/ISOT.2009.5326158
Wuzhou Song, D. Psaltis
We introduce a novel tuning mechanism for optofluidic devices by embedding pressure driven actuator inside microfluidic chips. Multiple tunable optofluidic devices remotely controlled by the pressure of air or liquid were demonstrated.
{"title":"Novel tuning method for optofluidics","authors":"Wuzhou Song, D. Psaltis","doi":"10.1109/ISOT.2009.5326158","DOIUrl":"https://doi.org/10.1109/ISOT.2009.5326158","url":null,"abstract":"We introduce a novel tuning mechanism for optofluidic devices by embedding pressure driven actuator inside microfluidic chips. Multiple tunable optofluidic devices remotely controlled by the pressure of air or liquid were demonstrated.","PeriodicalId":366216,"journal":{"name":"2009 International Symposium on Optomechatronic Technologies","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132002617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2009-11-10DOI: 10.1109/ISOT.2009.5326110
T. Bodendorfer, M. S. Muller, F. Hirth, A. Koch
The resolution of many optical measurement systems employing 1D or 2D array sensors (e.g. CCD-cameras) is limited by the pixel-resolution of the detector. Subpixel algorithms allow to exceed this limit.
{"title":"Comparison of different peak detection algorithms with regards to spectrometic fiber Bragg grating interrogation systems","authors":"T. Bodendorfer, M. S. Muller, F. Hirth, A. Koch","doi":"10.1109/ISOT.2009.5326110","DOIUrl":"https://doi.org/10.1109/ISOT.2009.5326110","url":null,"abstract":"The resolution of many optical measurement systems employing 1D or 2D array sensors (e.g. CCD-cameras) is limited by the pixel-resolution of the detector. Subpixel algorithms allow to exceed this limit.","PeriodicalId":366216,"journal":{"name":"2009 International Symposium on Optomechatronic Technologies","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129710636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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