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    • 2. 发明申请
    • Optical wavelength converter and image forming apparatus using the same
    • 光波长转换器及使用其的成像装置
    • US20070002909A1
    • 2007-01-04
    • US11474998
    • 2006-06-27
    • Yukio FurukawaTakashi Yuasa
    • Yukio FurukawaTakashi Yuasa
    • H01S3/10
    • H01S5/06256G02F1/3532G02F1/3775G02F2202/20H01S5/005H01S5/0092H01S5/06253H01S5/0683H04N9/3129
    • An optical wavelength converter includes a distributed Bragg reflector laser having an active area, a phase area, and a distributed Bragg reflector area in which a distributed Bragg reflector is formed; an optical wavelength conversion device for receiving fundamental wave light emitted from said distributed Bragg reflector laser and outputting second harmonic wave light of the fundamental wave light; and a control circuit for controlling an emission wavelength and a light output by controlling an injection current to be injected into the distributed Bragg reflector laser for each period. The control circuit controls the injection current to be injected into the distributed Bragg reflector laser while satisfying a condition for controlling a light output mode of the distributed Bragg reflector laser so that light energy to be inputted into the optical wavelength conversion device in each period is constant and satisfying a condition for injecting a current into each of an active area, a phase area, and a distributed Bragg reflector area in each of periods in a mode of constant amount of generated heat so that an injection current-emission wavelength characteristic in the distributed Bragg reflector area is constant.
    • 光波长转换器包括分布布拉格反射激光器,其具有有源区域,相位区域和分布式布拉格反射器区域,其中形成分布式布拉格反射器; 光波长转换装置,用于接收从所述分布布拉格反射激光器发出的基波光并输出基波光的二次谐波; 以及控制电路,用于通过控制每个时间段内要喷射到分布式布拉格反射器激光器中的喷射电流来控制发射波长和光输出。 控制电路控制喷射到分布式布拉格反射体激光器中的注入电流,同时满足用于控制分布布拉格反射器激光器的光输出模式的条件,使得在每个周期中输入到光波长转换装置的光能是恒定的 并且满足用于以恒定量的发生热量的模式在每个周期中的有源区域,相位区域和分布式布拉格反射器区域中的每一个中注入电流的条件,使得分布式发射器件中的注入电流 - 发射波长特性 布拉格反射器面积是恒定的。
    • 3. 发明申请
    • OPTICAL TOMOGRAPHIC IMAGING APPARATUS
    • 光学成像装置
    • US20120300217A1
    • 2012-11-29
    • US13575730
    • 2011-03-18
    • Takashi Yuasa
    • Takashi Yuasa
    • G01B9/02
    • G06T7/0002A61B3/102A61B5/0066G01B9/02091G01B2290/70G06T7/0014G06T2207/10101G06T2207/20104G06T2207/30041G06T2207/30168
    • Provided is an optical tomographic imaging apparatus including: a unit for creating a measuring beam and a reference beam from beam of a light source, and generating interference light by combining a return beam resulting from the measuring beam and the reference beam; a unit for detecting the interference light to generate a detection signal; a unit for forming an image of the object based on the detection signal; a unit for designating a specific area in the image; a unit for setting a calculation index and a determination reference range used for determining image quality of the specific area; and a unit for applying calculation processing to a luminance value of the specific area based on the calculation index, determining whether a calculated value obtained as a result of the calculation processing is within the determination reference range, and outputting a detection result.
    • 本发明提供一种光学层析成像装置,包括:用于从光源的光束产生测量光束和参考光束的单元,并且通过组合由测量光束产生的返回光束和参考光束产生干涉光; 用于检测干涉光以产生检测信号的单元; 用于基于检测信号形成对象的图像的单元; 用于指定图像中的特定区域的单元; 用于设定用于确定特定区域的图像质量的计算索引和确定参考范围的单元; 以及用于基于计算指标将计算处理应用于特定区域的亮度值的单元,确定作为计算处理的结果获得的计算值是否在确定参考范围内,并输出检测结果。
    • 4. 发明授权
    • Optical wavelength converter and image forming apparatus using the same
    • 光波长转换器及使用其的成像装置
    • US07330490B2
    • 2008-02-12
    • US11474998
    • 2006-06-27
    • Yukio FurukawaTakashi Yuasa
    • Yukio FurukawaTakashi Yuasa
    • H01S3/10H01S3/00
    • H01S5/06256G02F1/3532G02F1/3775G02F2202/20H01S5/005H01S5/0092H01S5/06253H01S5/0683H04N9/3129
    • An optical wavelength converter includes a distributed Bragg reflector laser having an active area, a phase area, and a distributed Bragg reflector area in which a distributed Bragg reflector is formed; an optical wavelength conversion device for receiving fundamental wave light emitted from said distributed Bragg reflector laser and outputting second harmonic wave light of the fundamental wave light; and a control circuit for controlling an emission wavelength and a light output by controlling an injection current to be injected into the distributed Bragg reflector laser for each period. The control circuit controls the injection current to be injected into the distributed Bragg reflector laser while satisfying a condition for controlling a light output mode of the distributed Bragg reflector laser so that light energy to be inputted into the optical wavelength conversion device in each period is constant and satisfying a condition for injecting a current into each of an active area, a phase area, and a distributed Bragg reflector area in each of periods in a mode of constant amount of generated heat so that an injection current-emission wavelength characteristic in the distributed Bragg reflector area is constant.
    • 光波长转换器包括分布布拉格反射激光器,其具有有源区域,相位区域和分布式布拉格反射器区域,其中形成分布式布拉格反射器; 光波长转换装置,用于接收从所述分布布拉格反射激光器发出的基波光并输出基波光的二次谐波; 以及控制电路,用于通过控制每个时间段内要喷射到分布式布拉格反射器激光器中的喷射电流来控制发射波长和光输出。 控制电路控制喷射到分布式布拉格反射体激光器中的注入电流,同时满足用于控制分布布拉格反射器激光器的光输出模式的条件,使得在每个周期中输入到光波长转换装置的光能是恒定的 并且满足用于以恒定量的发生热量的模式在每个周期中的有源区域,相位区域和分布式布拉格反射器区域中的每一个中注入电流的条件,使得分布式发射器件中的注入电流 - 发射波长特性 布拉格反射器面积是恒定的。
    • 5. 发明授权
    • Optical tomographic imaging apparatus
    • 光学层析成像装置
    • US09299134B2
    • 2016-03-29
    • US13575730
    • 2011-03-18
    • Takashi Yuasa
    • Takashi Yuasa
    • G01B9/02G06T7/00A61B3/10A61B5/00
    • G06T7/0002A61B3/102A61B5/0066G01B9/02091G01B2290/70G06T7/0014G06T2207/10101G06T2207/20104G06T2207/30041G06T2207/30168
    • Provided is an optical tomographic imaging apparatus including: a unit for creating a measuring beam and a reference beam from beam of a light source, and generating interference light by combining a return beam resulting from the measuring beam and the reference beam; a unit for detecting the interference light to generate a detection signal; a unit for forming an image of the object based on the detection signal; a unit for designating a specific area in the image; a unit for setting a calculation index and a determination reference range used for determining image quality of the specific area; and a unit for applying calculation processing to a luminance value of the specific area based on the calculation index, determining whether a calculated value obtained as a result of the calculation processing is within the determination reference range, and outputting a detection result.
    • 本发明提供一种光学层析成像装置,包括:用于从光源的光束产生测量光束和参考光束的单元,并且通过组合由测量光束产生的返回光束和参考光束产生干涉光; 用于检测干涉光以产生检测信号的单元; 用于基于检测信号形成对象的图像的单元; 用于指定图像中的特定区域的单元; 用于设定用于确定特定区域的图像质量的计算索引和确定参考范围的单元; 以及用于基于计算指标将计算处理应用于特定区域的亮度值的单元,确定作为计算处理的结果获得的计算值是否在确定参考范围内,并输出检测结果。
    • 7. 发明申请
    • INFORMATION PROCESSING APPARATUS IN OCT SYSTEM
    • OCT系统中的信息处理设备
    • US20120053904A1
    • 2012-03-01
    • US13266468
    • 2010-03-30
    • Takashi YuasaMitsuro Sugita
    • Takashi YuasaMitsuro Sugita
    • G06F15/00
    • A61B3/102A61B5/0066A61B5/0073A61B5/0261
    • Provided is an information processing apparatus in an OCT system capable of acquiring tomographic information and moving velocity information of an object at high speed and over a region larger than a spot size. The apparatus splits light including a plurality of lights of at least first and second light into measurement lights and reference lights and acquires tomographic information and moving velocity information of an object, having: a scanning optical system for scanning with the measurement light; an optical system for applying the measurement light to different spot positions; interference signal generating devices which generate first and second interference signals from a return light obtained when the measurement light is applied to the positions and the reference light reflected by a reference mirror; and a signal processing device which calculates a variation in phase using the interference signals and computes a moving velocity of the object.
    • 提供了一种OCT系统中的信息处理装置,其能够以高速度和大于点尺寸的区域获取物体的断层信息和移动速度信息。 该装置将包括至少第一和第二光的多个光的光分解成测量光和参考光,并获取物体的断层信息和移动速度信息,具有:用测量光扫描的扫描光学系统; 用于将测量光施加到不同光斑位置的光学系统; 干扰信号产生装置,其从当将测量光施加到由参考反射镜反射的位置和参考光时获得的返回光产生第一和第二干涉信号; 以及信号处理装置,其使用干扰信号计算相位的变化,并计算物体的移动速度。