| 摘要 |
PURPOSE:To enable the measurement depending on the luminosity difference, by inserting a measuring section into an object to be measured. CONSTITUTION:A light source (A) is provided longitudinally above a cylinder body 1. Light beam irradiated from the light source (A) is transmitted through a half mirror or a prism 2 and is incident from the top plane of the cylinder body 1, pentrating it 1. The light beam is transmitted through an object (B) to be measured at a measuring section 4 separated at an interval and reflected with a reflector 3 provided below the body changes to the reflected light. Then, it is transmitted again through the body (B) being measured and be incident into the cylinder body 1 from the bottom plane of the cylinder body 1 penetrat ing the body 1. Moreover, it is reflected at the right angle with the half mirror or the prism 2 from the top plane and received with a light measuring device (C) to obtain the measured value depending on the luminosity difference. |
