| 摘要 |
PROBLEM TO BE SOLVED: To provide a device for projecting and accepting light in which the light from the light-projecting part is prevented from intruding as harmful light to an accepting part so as to realize high accuracy measurement without changing the packaging design. SOLUTION: This device for projecting and accepting light consists of a projecting part 11 to project light to the object, an accepting part 12 to accept the light projected to the object and reflected by the object, and a light- transmitting panel having window frame members 6a, 6b, 3a in a separated body from the device and disposed on the front face of the light-accepting part 12. For example, light-shielding members 14a, 14b to cover the joined part of the window members 6a, 6b and the window member 3a are attached, or the joined part is coated with a light-shielding coating material to change into opaque so that intrusion of projected light reflected on the inner face near the joined part is prevented from entering the accepting part 12. |
