Abstract:
An image reading apparatus of the present invention includes a first light source, a first light guide, a second light source, a second light guide, light receiving elements and a lens unit. The first light source emits first light. The first light guide directs the first light from the first light source toward an image-carrying object as first linear light extending in a primary scanning direction. The second light source emits second light of a wavelength different from that of the first light. The second light guide directs the second light from the second light source toward the image-carrying object as second linear light extending in the primary scanning direction. The light receiving elements are arranged in the primary scanning direction. The first and second linear lights are reflected by the image-carrying object, and the reflected lights are guided by the lens unit toward the light receiving elements.
Abstract:
An elongate light guide includes a light incident portion provided at an end in the longitudinal direction of the guide, a light reflecting portion extending in the longitudinal direction, a light emitting portion extending in the longitudinal direction for emitting linear light, and a scatterer for scattering the light entering through the light incident portion. For instance, the scatterer is provided as a grained portion formed at least part of the reflecting portion.
Abstract:
An image reading apparatus includes a light source, a plurality of light receiving elements arranged in a primary scanning direction, and an optical part having either one of the function to direct light emitted from the light source toward an object to be read as linear light extending in the primary scanning direction and the function to guide reflected light of the linear light toward the light receiving elements. The light source, the light receiving elements and the optical part are accommodated in a case which is in the form of an elongated rectangle. The case is formed with an opening extending in the primary scanning direction. A glass cover is fitted in the opening, and part of the glass cover is bonded to part of the opening with resin. The case includes a pair of inner walls adjoining the opening and facing each other at a predetermined distance in a secondary scanning direction. The optical part includes a first surface facing an inner surface of the glass cover and a second surface facing one of the inner walls. The optical part is arranged along one of the paired inner walls. An inclined surface is provided between the first and the second surfaces. The inclined surface is so inclined as to become more distant from the inner surface of the glass cover as proceeding toward the second surface.
Abstract:
An optical component structure includes an elongate optical component, a support member to which the optical component is fixed, and an adhesive for bonding the optical component to the support member. The optical component is provided with a contacting portion and a bonding portion different in position from the contacting portion. The contacting portion is brought into direct contact with the support member in a direction perpendicular to the longitudinal direction of the optical component. The adhesive is applied to the bonding portion, but not to the contacting portion. Examples of the optical component include a linear light source unit and a lens unit used in an image sensor module.