Image reading apparatus
AssigneePfu Limited
InventorAkira Iwayama
Life of this patent
Estimating the term…
Abstract
An image reading apparatus includes a light source unit, an image sensor, and a light guiding unit at least including a light reflector. The light guiding unit may include a first masking shield and a second masking shield. The light source unit irradiates light toward an original. The image sensor picks up an image of the original based on reflected light of the light by the original. The light guiding unit is provided on an opposite side to the light source unit to cause a part of the light to directly enter into the image sensor, when the original is not fed to the image sensor. The light guiding unit reduces light incident to the image sensor, among the light and light having transmitted through the original, at the time of picking up the image of the original by the image sensor.
Claims14
An image reading apparatus, comprising:
- a conveying path that conveys a reading medium having thereon an image to be read;
- a light source that irradiates light toward the conveying path, and irradiates the light toward the reading medium when the reading medium is conveyed;
- an image sensor that picks up an image on the reading medium based on reflected light of the light by the reading medium;
- and
- a light guiding unit that is provided on an opposite side to the light source with respect to the conveying path, the light guiding unit including
- a reflecting unit that reflects a part of the light irradiated from the light source to guide the part of the light directly to the image sensor when the reading medium is not conveyed to the light guiding unit, and
- a shielding unit provided between the reflecting unit and the image sensor in a direction orthogonal to the reading medium to reduce disturbance light incident to the image sensor, among the light irradiated from the light source and light having transmitted through the reading medium, when the reading medium is fed to the image sensor.
Dependencies are inferred from the claim text.