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    • 9. 发明授权
    • Elastic foothold for stairs
    • US10174506B2
    • 2019-01-08
    • US15768499
    • 2016-10-10
    • Tae Joong Kim
    • Tae Joong Kim
    • E04F11/104E04F11/17E04F15/22
    • The present invention relates to an elastic foothold for stairs comprising: an upper plate, wherein one or more first coupling protrusions are formed on a side of a bottom surface, one or more first block insertion parts having second coupling protrusions are formed on the other side of the bottom surface, and a first anti-slip part is formed on a side of a top surface; a lower plate, wherein first coupling grooves corresponding to the first coupling protrusions are formed on a side of the bottom surface so as to be male/female-coupled to a side of the upper plate, and one or more second block insertion parts having third coupling protrusions are formed on the other side of the bottom surface; one or more first blocks that are inserted and coupled to the first block insertion parts, that have second coupling grooves formed on a bottom surface so as to be male/female-coupled to the second coupling protrusions, and that have third coupling grooves formed on a top surface; one or more second blocks that are inserted and coupled to the second block insertion parts, that have fourth coupling grooves formed on a bottom surface so as to be male/female-coupled to the third coupling protrusions, and that have fifth coupling grooves formed on a top surface; and one or more first elastic members, wherein both ends are respectively fixed to the fourth coupling grooves and the fifth coupling grooves between the first blocks and the second blocks. According to the present invention, an elastic foothold for stairs that can be fixed to stairs and that minimises shock applied to feet when climbing up and down the stairs so as to be able to prevent harmful effects on joints such as knees of a walker can be provided.
    • 10. 发明授权
    • Optical measuring apparatuses including polarized beam splitters
    • 包括偏振分束器的光学测量装置
    • US08736839B2
    • 2014-05-27
    • US13281656
    • 2011-10-26
    • Young HeoChang Hoon ChoiByung Seon ChunKwang Soo KimTae Joong Kim
    • Young HeoChang Hoon ChoiByung Seon ChunKwang Soo KimTae Joong Kim
    • G01J4/00
    • G02B21/0064G01B11/026G01B11/06G01B11/24
    • An optical measuring apparatus may include a light source, linear polarizer, polarized beam splitter, quarter wave plate, objective lens, and/or light receiver. The polarized beam splitter may be configured to transmit linearly polarized light from the linear polarizer to any one of a first and second optical path. The quarter wave plate may be configured to circularly polarize light transmitted through the first optical path from the polarized beam splitter and transmit the circularly polarized light to an object to be measured, and the quarter wave plate may be configured to linearly polarize the circularly polarized light reflected from the object to be measured and transmit the linearly polarized reflected light to the second optical path of the polarized beam splitter. The objective lens may be configured to generate light having different wavelengths by generating chromatic aberration in the circularly polarized light from the quarter wave plate.
    • 光学测量装置可以包括光源,线性偏振器,偏振分束器,四分之一波片,物镜和/或光接收器。 偏振分束器可以被配置为将来自线性偏振器的线偏振光透射到第一和第二光路中的任一个。 四分之一波片可以被配置为使从偏振分束器透射通过第一光路的光圆偏振,并将圆偏振光透射到被测量物体,并且四分之一波片可以被配置为使圆偏振光线性偏振 从被测量物体反射并将线性偏振反射光传输到偏振分束器的第二光路。 物镜可以被配置为通过在来自四分之一波片的圆偏振光中产生色差来产生具有不同波长的光。