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    • 18. 发明授权
    • Surveying instrument having an optical distance meter
    • 具有光学距离计的测量仪器
    • US06532059B2
    • 2003-03-11
    • US09842780
    • 2001-04-27
    • Masami ShiraiKiyoshi Araki
    • Masami ShiraiKiyoshi Araki
    • G01C300
    • G01S7/497G01C3/08G01S7/4812G01S7/4818
    • A surveying instrument includes an optical distance meter which has a light-transmitting optical system and a light-receiving optical system, the light-receiving optical system including a light-receiving element; a first wavelength selection filter and a second wavelength selection filter for allowing only light within a first wavelength range to pass therethrough, to be thereafter incident on the light-receiving element, wherein the first wavelength selection filter allows light with a wavelength equal to or greater than a first specific wavelength to pass therethrough, and a second wavelength selection filter allows light with a wavelength equal to or shorter than a second specific wavelength, which is longer than the first specific wavelength, to pass therethrough; and an angle adjusting device for adjusting an angle of inclination of the first and second wavelength selection filter with respect to an optical path thereof.
    • 测量仪器包括具有透光光学系统和光接收光学系统的光学距离计,所述光接收光学系统包括光接收元件; 第一波长选择滤光器和第二波长选择滤光器,其仅允许第一波长范围内的光通过,然后入射到光接收元件上,其中第一波长选择滤光器允许波长等于或更大的光 比第一特定波长通过,第二波长选择滤光器允许波长等于或短于第一特定波长的波长的光通过其中; 以及用于调整第一和第二波长选择滤光器相对于其光路的倾斜角度的角度调节装置。