METHOD AND APPARATUS FOR MEASURING TASTE DEGREE OF RICE

摘要

PURPOSE:To make it possible to measure the taste of rice accurately and objectively by projecting light rays on boiled rice to be measured, reflecting the light rays, provid ing a polarizing filter in the light path of the light rays, and judging the gloss of the rice. CONSTITUTION:The light emitted from a light source 3 is inputted on the surface of a boiled rice A through a diffusing plate 4 and reflected. Of the reflected light, the reflected light from the surface of a water holding film becomes the polarized light. The light, which is transmitted through the water holding film and diffused and reflected from the surface of the rice, becomes the non-polarized light. The reflected light wherein the polarized light and the non-polarized light are overlapped passes a polarizing filter 5. The filter 5 passes only the component whose optical axis is in parallel with the optical axis of the filter among the components of the arrived light. The component which is orthogonal to the optical axis of the filter is shielded. Therefore, the component of the passed light (or the shielded light) can be controlled by turning the filter 5 and changing the angle of the optical axis. The light which has passed through the filter 5 reaches a photodetector 8 through a convex lens 7, and the amount of the light is measured. The light from the photodetector 8 is sent to a display device 9 and converted into the numerical value, and the result is displayed.