Patent ID: 7646487

Claim:
A reflectance measuring apparatus, comprising: a light source, capable of providing detection light; a first light detection portion, capable of detecting the intensity of light; a light source modulating portion capable of modulating the detection light to a sample and modulating reflected light from the sample to the first light detection portion, the light source modulating portion comprising: a beam splitter capable of splitting the detection light into a first detection light and a second detection light; and a lens capable of focusing the first detection light on the sample; a second light detection portion, capable of detecting the intensity of light; and a reflecting cover comprising: a cone-shaped aperture formed therein for the detection light and the reflected light to pass through; and a parabolic surface with a focal point located at the sample so that the parabolic surface is capable of modulating the reflected light to become parallel light to the second light detection portion, the reflecting cover being disposed between the sample and the light source modulating portion, the reflecting cover being capable of introducing the reflected light scattered from the sample to the second light detection portion.