| 摘要 |
<P>PROBLEM TO BE SOLVED: To surely remove harmful light such as flare and ghost caused by reflection of an objective lens back (or a boundary surface) even in the case of using either visible light or infrared light. <P>SOLUTION: This ophthalmology test device sharing the objective lens 11 with a photographing optical system and an illuminating optical system is provided with a black point board 8 having a black point 8a shading an infrared area and a black point 8b shading a visible light area. The thickness d of the black point board 8 is selected so that the black point 8a and the black point 8b are respectively disposed in designated positions in the illuminating optical system suitable for shielding harmful light having a wavelength to be shielded. For example, the black point 8a for infrared light and the black point 8b for visible light are given different transmission characteristics, respectively, so that the black point 8a shades the infrared region only, and the black point 8b for visible light shades light of overall wavelength region. <P>COPYRIGHT: (C)2003,JPO |
