PROBLEM TO BE SOLVED: To improve the visibility of irregularities on biological tissues of surface microstructures, hyperplasia, and the like.SOLUTION: Excitation light EL strikes phosphors, causing the excitation and emission of white light W. High extinction wavelength regions A1 and A2, among the white light, in which the extinction coefficient for blood hemoglobin is high, are removed by a high extinction wavelength removal filter to generate light from which high extinction wavelengths have been eliminated. The light from which high extinction wavelengths have been eliminated is used to illuminate a subject, and image light reflected therefrom is captured by a color CCD. A microstructure image is generated on the basis of a signal Bp outputted from B pixels of the CCD. In the microstructure image, the display of surface microvasculature is suppressed, thus relatively improving the visibility of surface microstructures such as pit patterns.COPYRIGHT: (C)2013,JPO&INPIT【課題】表層微細構造や肥厚などの生体組織上の凹凸の視認性を向上させる。【解決手段】励起光ELを蛍光体に当てて白色光Wを励起発光させる。白色光のうち血中ヘモグロビンの吸光係数が高い高吸光波長域A1,A2の成分を、高吸光波長除去フィルタで除去して高吸光波長カット光を生成する。この高吸光波長カット光を被検体に照明し、その反射光の像光をカラーのCCDで撮像する。CCDのB画素から出力される信号Bpに基づき微細構造画像を生成する。この微細構造画像は、表層微細血管の表示が抑制されていることで、相対的にピットパターンなどの表層微細構造の視認性が向上している。【選択図】図4
