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    • 2. 发明授权
    • Autolensmeter
    • 自动电流表
    • US4828385A
    • 1989-05-09
    • US29728
    • 1987-03-24
    • Yasufumi FukumaAkihiro Arai
    • Yasufumi FukumaAkihiro Arai
    • G01M11/02
    • G01M11/0228
    • An autolensmeter for inspecting refracting power of optical systems is herein disclosed, which comprises a collimater lens for projecting light from a light source onto an optical system to be examined as a parallel luminous flux, a mask means having a mask pattern for selectively transmitting the luminous flux from the optical system and a photodetecting means for receiving the luminous flux partially transmitted through the mask pattern, disposed at a non-image forming position of the optical system, characterized in that an optical element is arranged in close vicinity of the mask pattern so that the light source and the photodetecting means are in an optical conjugate relationship with each other. The automlensmeter masks it possible to enlarge the width of the effective luminous flux for measuring the refracting power of the optical system without reducing the sharpness of the pattern projected on the photodetecting means and thereby eliminating the requirements for the use of photodetecting means of a high sensitivity and light sources of a high luminance and the accuracy of measurement being not influenced by the presence of, for instance dusts and/or water drops on the optical system and/or the mask means.
    • 本发明公开了一种用于检查光学系统的折射能力的自动光度计,其包括用于将来自光源的光投射到要被检查的光学系统作为平行光束的准直透镜,具有用于选择性地透射发光的掩模图案的掩模装置 来自光学系统的光束和用于接收部分透过掩模图案的光通量的光检测装置,其设置在光学系统的非图像形成位置,其特征在于,光学元件布置在掩模图案附近,所以 光源和光检测装置彼此处于光共轭关系。 自动计数器可以掩蔽有效光通量的宽度来扩大光学系统的折射能力,而不会降低投影在光检测装置上的图案的清晰度,从而消除了使用高灵敏度的光检测装置的要求 并且高亮度的光源和测量的精度不受光学系统和/或掩模装置上的灰尘和/或水滴的存在的影响。
    • 3. 发明授权
    • Opthalmological measuring apparatus
    • 光学测量仪器
    • US4796989A
    • 1989-01-10
    • US73707
    • 1987-07-15
    • Yasufumi FukumaYoshinori OanaAkihiro Arai
    • Yasufumi FukumaYoshinori OanaAkihiro Arai
    • A61B3/10A61B3/103G01M11/02
    • A61B3/103G01M11/0235
    • An ophthalmological measuring apparatus is disclosed. It comprises a projecting systems for projecting a target image to the cornea and retina of an eye to be tested, respectively, a measuring optical system for being introduced a corneal reflecting beam of light and a retina reflecting beam of light from the eye, a light receiving portion for receiving the corneal reflecting beam of light and the retina reflecting beam of light through the measuring optical system and photoelectrically transferring the same, an image displaying device for displaying an image of the anterior portion of the eye based on a signal from the light receiving portion, and a calculating device for calculating and measuring a corneal configuration and an eye refractive power of the eye to be tested based on the signals of the corneal reflecting beam of light and the retina reflecting beam of light detected by the light receiving portion.
    • 公开了一种眼科测量装置。 它包括一个用于将目标图像投射到被测眼睛的角膜和视网膜上的投影系统,用于引入角膜反射光束和从眼睛反射光束的视网膜的测量光学系统, 用于通过测量光学系统接收角膜反射光束和视网膜反射光束的光接收部分,并对其进行光电转移;图像显示装置,用于基于来自光的信号显示眼睛前部的图像 以及计算装置,用于基于由光接收部分检测到的角膜反射光束和视网膜反射光束的信号来计算和测量待测眼睛的角膜构型和眼睛屈光度。
    • 4. 发明授权
    • Optical image measurement device and optical image measurement method
    • 光学图像测量装置和光学图像测量方法
    • US07604351B2
    • 2009-10-20
    • US12055954
    • 2008-03-26
    • Yasufumi FukumaHisashi TsukadaTsutomu KikawaKazuhiko Yumikake
    • Yasufumi FukumaHisashi TsukadaTsutomu KikawaKazuhiko Yumikake
    • A61B3/14
    • G01B9/0203A61B3/102G01B9/02044G01B9/02067G01B9/02091G01B2290/65G01N21/4795
    • An optical image measurement device comprises: an interference-light generator configured to generate an interference light by splitting a low-coherence light into a signal light and a reference light and superimposing the signal light having passed through an eye and the reference light having passed through a reference object; a detector configured to detect the generated interference light; a calculator configured to obtain intensity distribution of the interference light in the eye, based on a result of the detection by the detector; a determining part configured to determine a projection position of the signal light to the eye, based on the obtained intensity distribution; and an image forming part configured to form an image of the eye, based on a result of detection of a new interference light based on a new signal light projected toward the determined projection position and a new reference light having passed through the reference object.
    • 光学图像测量装置包括:干涉光发生器,被配置为通过将低相干光分解成信号光和参考光来产生干涉光,并叠加已经通过眼睛的信号光和已经穿过的参考光 参考对象; 检测器,被配置为检测所产生的干涉光; 配置为基于检测器的检测结果获得眼睛中的干涉光的强度分布的计算器; 确定部件,被配置为基于获得的强度分布来确定信号光对眼睛的投影位置; 以及基于对所确定的投影位置投射的新的信号光的新的干涉光的检测结果和通过所述参照对象的新的基准光,构成为形成所述眼睛的图像的图像形成部。
    • 5. 发明授权
    • Fundus observation device
    • 眼底观察装置
    • US07566132B2
    • 2009-07-28
    • US11697030
    • 2007-04-05
    • Yasufumi FukumaHiroyuki OtsukaKazuhiko YumikakeHiroaki OkadaYutaka Nishio
    • Yasufumi FukumaHiroyuki OtsukaKazuhiko YumikakeHiroaki OkadaYutaka Nishio
    • A61B3/10
    • A61B3/102
    • LCD 140 is provided for displaying an internal fixation target for fixating an eye E. Projection optical system (a part of an imaging optical system 120) is provided for projecting the displayed internal fixation target onto the a fundus oculi Ef. Image forming part 220 is provided for forming 2-dimensional images (images of fundus oculi) Ef of the surface of fundus oculi Ef. Display part 240A is provided for displaying images of fundus oculi Ef. Operation part 240B is provided for specifying the position of the displayed images of fundus oculi Ef. Main controller 211 is provided for changing the projection position of the internal fixation target on the fundus oculi by changing the display position of the fixation target by the LCD 140 based on the specified position. The image forming part 220 forms tomographic images of the fundus oculi Ef with the internal fixation target projected.
    • LCD 140用于显示用于固定眼睛E的内部固定目标。投影光学系统(成像光学系统120的一部分)用于将所显示的内部固定目标投影到眼底Ef上。 图像形成部220被设置用于形成眼底表面Ef的2维图像(眼底的图像)Ef。 显示部240A用于显示眼底Ef的图像。 操作部240B用于指定所显示的眼底图像的位置Ef。 主控制器211用于通过基于指定位置改变LCD 140的固定目标的显示位置来改变内眼固定目标在眼底上的投影位置。 图像形成部分220形成具有投影内固定目标的眼底Ef的断层图像。
    • 6. 发明申请
    • Optical Image Measuring Apparatus
    • 光学图像测量仪器
    • US20090153873A1
    • 2009-06-18
    • US12086280
    • 2006-11-07
    • Kinpui ChanMasahiro AkibaYasufumi FukumaHisashi Tsukada
    • Kinpui ChanMasahiro AkibaYasufumi FukumaHisashi Tsukada
    • G01B9/023
    • G01B9/02067G01B9/02014G01B9/02069G01B9/02081G01B9/02083G01B9/0209G01B2290/45G01B2290/70G01N21/21G01N21/4795
    • Provided is an optical image measuring apparatus capable of obtaining a high-accuracy image without being influenced by a movement of an object to be measured. Flash light is emitted from a xenon lamp (2) and converted into broad band light by an optical filter (2A). A polarization characteristic of the flash light is converted into linear polarization by a polarizing plate (3). Then, the flash light is divided into signal light (S) and reference light (R) by a half mirror (6). A polarization characteristic of the reference light (R) is converted into circular polarization by a wavelength plate (7). The signal light (S) and the reference light (R) are superimposed on each other by the half mirror (6) to produce interference light (L). A CCD (23) detects interference light having the same characteristic as that of the produced interference light (L). The produced interference light (L) is divided into an S-polarized light component (L1) and a P-polarized light component (L2) by a polarization beam splitter (11). The polarized light components are detected by CCDs (21 and 22). A signal processing section (20) of a computer (30) forms an image of the object to be measured (O) based on detection signals from the CCDs (21, 22, and 23).
    • 本发明提供能够得到高精度图像而不受被测定物的移动影响的光学图像测定装置。 闪光灯从氙灯(2)发射并通过滤光器(2A)转换成宽带光。 闪光的偏振特性由偏光板(3)转换成线偏振光。 然后,闪光被半反射镜(6)分为信号光(S)和参考光(R)。 参考光(R)的偏振特性由波片(7)转换成圆偏振。 信号光(S)和参考光(R)通过半反射镜(6)彼此重叠以产生干涉光(L)。 CCD(23)检测与产生的干涉光(L)的特性相同的干涉光。 所产生的干涉光(L)被偏振分束器(11)分为S偏振光分量(L1)和P偏振光分量(L2)。 偏振光分量由CCD(21和22)检测。 计算机(30)的信号处理部(20)基于来自CCD(21,22,23)的检测信号,形成被测量物体(O)的图像。
    • 9. 发明授权
    • Optical image measuring apparatus
    • 光学图像测量装置
    • US07372578B2
    • 2008-05-13
    • US11223928
    • 2005-09-13
    • Masahiro AkibaKinpui ChanYasufumi FukumaHiroyuki OtsukaHisashi TsukadaKazuhiko Yumikake
    • Masahiro AkibaKinpui ChanYasufumi FukumaHiroyuki OtsukaHisashi TsukadaKazuhiko Yumikake
    • G02B9/02
    • G01B9/02014G01B9/02003G01B9/02027G01B9/02069G01B9/02091G01B11/2441G01B2290/45G01B2290/70
    • Provided is an optical image measuring apparatus capable of effectively receiving interference light, particularly an alternating current component thereof using a smaller number of photo sensors. The optical image measuring apparatus includes a polarizing plate for converting a light beam from a broad-band light source to linearly polarized light, a half mirror for dividing the light beam into signal light and reference light, a piezoelectric element for vibrating a reference mirror, a wavelength plate for converting the reference light to circularly polarized light, a polarization beam splitter for extracting two different polarized light components from interference light produced from the signal light and the reference light which are superimposed on each other by the half mirror, CCDs for detecting the two different polarized light components, and a signal processing portion for producing an image of an object to be measured based on the detected polarized light components. A frequency for intensity modulation of the light beam is synchronized with a beat frequency of the interference light. A frequency of vibration of the reference mirror is synchronized with the beat frequency of the interference light and an amplitude of vibration thereof is set to be equal to or smaller than a wavelength of the interference light.
    • 提供一种光学图像测量装置,其能够使用较少数量的光传感器有效地接收干涉光,特别是其交流分量。 该光学图像测量装置包括用于将来自宽带光源的光束转换为线偏振光的偏振片,用于将光束分成信号光的半反射镜和参考光,用于振动参考反射镜的压电元件, 用于将参考光转换成圆偏振光的波长板,用于从由半反射镜彼此叠加的信号光和参考光产生的干涉光中提取两种不同的偏振光分量的偏振分束器,用于检测的CCD 两个不同的偏振光分量,以及用于基于检测到的偏振光分量产生待测物体的图像的信号处理部分。 光束的强度调制频率与干涉光的拍频同步。 参考反射镜的振动频率与干涉光的拍频同步,其振动振幅被设定为等于或小于干涉光的波长。