Invention Application
US20070121176A1 Image forming apparatus having an optical unit and an image reading device capable of preventing deterioration of image reading accuracy
审中-公开
具有能够防止图像读取精度恶化的光学单元和图像读取装置的图像形成装置
- Patent Title: Image forming apparatus having an optical unit and an image reading device capable of preventing deterioration of image reading accuracy
- Patent Title (中): 具有能够防止图像读取精度恶化的光学单元和图像读取装置的图像形成装置
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Application No.: US11604242Application Date: 2006-11-27
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Publication No.: US20070121176A1Publication Date: 2007-05-31
- Inventor: Kohichi Yamazaki , Tetsuya Kimura , Hiroshi Kusumoto , Yoshiaki Nagao , Takehisa Shimazu
- Applicant: Kohichi Yamazaki , Tetsuya Kimura , Hiroshi Kusumoto , Yoshiaki Nagao , Takehisa Shimazu
- Assignee: Ricoh Company, Limited
- Current Assignee: Ricoh Company, Limited
- Priority: JP2005-341992 20051128
- Main IPC: H04N1/04
- IPC: H04N1/04
Abstract:
An optical unit may include an image pick-up device, a lens unit and a holding member. The image pick-up device may convert a reflected light reflected from an original document to an electric signal, after the light is irradiated on the original document from a light source. The lens unit may image the reflected light on the image pick-up device. The holding member may hold the image pick-up device and lenses. The direction of a fluctuation of a focal length of the lens unit caused by heat and a direction of the fluctuation of a distance between the image pick-up device and the lens unit caused by heat may agree with each other.
Information query
