LENS FOR A CIS CAPABLE OF EVENLY DIFFUSING THE LIGHT OF AN LED TO A LONGITUDINAL DIRECTION AND A LIGHT SOURCE FOR THE CIS INCLUDING THE SAME AND THE CIS INCLUDING THE LIGHT SOURCE

摘要

PURPOSE: A lens for a CSI, a light source for the CSI including the same, and a CSI including the light source are provided to improve scan quality and to evenly diffuse the light of an LED by a diffusing sheet which is laminated on the outer circumferential side of the top of the lens.;CONSTITUTION: A plurality of LEDs is installed on the top of an LED array(100) which is extended as a fixed length. A CIS(Contact Image Sensor) lens(200) is composed of an upper part for refracting light and a lower part for covering the top of the LED array. The upper part of the CIS lens has a semicircular cross section and the lower part of the CIS lens has a flat incidence surface. The LED array is located in the bottom of the lower part of the CIS lens. A groove(200h) accepts the LED. A diffusing sheet is laminated on the outer circumferential side of the upper part of the CIS lens. A prism sheet is laminated on the outer circumferential side of the diffusing sheet.;COPYRIGHT KIPO 2012