TW200707786A - Whiteness level detector - Google Patents

Abstract

A whiteness level detector for detecting the whiteness of objects comprises a case, a container for containing objects to be detected, a detect unit, a display unit and a power supply unit. The container is in a spoon type and is located at a front end of the case. The container is furnished with a top cover. The detect unit and the power supply unit are furnished in the case. The display unit is exposed outside the case. A transparent plate is furnished between the detect unit and container. The detect unit further comprises a light source, a light spreader, a light sensor and a control circuit. The light source, light sensor, power supply unit and display unit are coupled to the control circuit. The light sensor is located at the front end of the detect unit and is adjacent to the transparent plate. The light source is located opposite to a rear end of the light sensor and can emit light toward the light sensor. The light spreader is located between the light sensor and the light sensor. The light emitted by the light source is smoothed by the light spreader and then emits on the objects through the transparent plate. The light sensor receives the reflected light from the objects and transforms the brightness of the reflected light into electrical signals which are then transmitted to the control circuit to calculate the whiteness ratio. The result of the detection is then displayed no the displayed unit.