| 摘要 |
<p>There is disclosed an optical color sensor 16 comprising a light source 18 which comprises white LEDs for directing a white light onto a product 4 to be inspected, to directly illuminate the product 4 and generate a reflected light reflected from the product. The optical color sensor 16 further comprises first photo detecting element means 22 spaced from the product 4. A blue filter 24 is interposed between the first photo detecting element means 22 and the product 4 so that the first photo detecting element means 22 can receive and detect the reflected light passing through the blue filter 24. The optical color sensor 16 further comprises second photo detecting element means 26 spaced from the product 4. A red filter 28 is interposed between the second photo detecting element means 26 and the product 4 so that the second photo detecting element means 26 can receive and detect the reflected light passing through the red filter 28. The first and second photo detecting element means 22,26 are arranged to receive and detect the reflected light reflected from the product 4 at substantially the same position in a region onto which the white LEDs direct the white light. <IMAGE></p> |
