| 摘要 |
PURPOSE:To easily carry a densitometer and to take a measurement by providing an aperture for measurement, a lamp, a reflected light measurement system, a reference light measurement system, etc. CONSTITUTION:Illumination luminous flux emitted by the lamp 21 is controlled by an opening formed atop of a light shielding cylinder 20 to illuminate a body 22 to be measured in the aperture 17a for measurement. Further, the reflected light measurement system controls light reflected by the surface of the body 22 to be measured in the aperture 17a by the opening provided atop of the light shielding cylinder 23 and the light is incident on a photodetector 26 through a lens 24 and a filter 25 and converted photoelectrically. The reference light measurement system, on the other hand, consists of a light shielding cylinder 27 communicated with the light shielding cylinder 20, a filter 25, and a photodetecting element 28 and a part of the illumination light emitted by the lamp 21 is extracted and converted by the element 28 photoelectrically. Then the output signals of those measurement systems are converted into density signals and the obtained reflection density is displayed 11. Thus, the densitometer is easily carried and measurement is easily performed. |
