Scanning apparatus for preventing defocus aberration
AssigneePrimax Electronics Ltd.
InventorsHsi-Yu Chen, Chien-Kuo Kuan
Life of this patent
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Abstract
A scanning apparatus for preventing defocus aberration is provided. The scanning apparatus includes a flatbed scanning portion and a scanning module. The flatbed scanning portion includes a glass platform. The scanning module includes a scanning module case, a light source, multiple reflective mirrors, a lens, an optical sensing element, a printed circuit board and a metallic post. The metallic post is interconnected between the scanning module case and the printed circuit board. The printed circuit board is not in direct contact with the scanning module case so as to prevent defocus aberration resulting from thermal expansion.
Claims13
A scanning module for preventing defocus aberration, said scanning module comprising:
- a scanning module case having a perforated structure;
- a light source disposed on said scanning module case for emitting a light beam and projecting the light beam onto a document;
- multiple reflective mirrors disposed on said scanning module case for successively reflecting said light beam;
- a lens for focusing said light beam;
- an optical sensing element for receiving said light beam and converting said light beam into an electronic signal;
- a printed circuit board connected to said optical sensing element for receiving said electronic signal, thereby outputting an image of said document;
- and
- a metallic post partially embedded into said perforated structure and fixed on said scanning module case, wherein said metallic post has a first end connected to said printed circuit board such that said printed circuit board is not in direct contact with said scanning module case.
A scanning apparatus for preventing defocus aberration and reading an image of a document, said scanning apparatus comprising:
- a flatbed scanning portion including a glass platform;
- and
- a scanning module comprising:
- a scanning module case having a perforated structure;
- a light source disposed on said scanning module case for emitting a light beam and projecting the light beam onto the document;
- multiple reflective mirrors disposed on said scanning module case for successively reflecting said light beam;
- a lens for focusing said light beam;
- an optical sensing element for receiving said light beam and converting said light beam into an electronic signal;
- a printed circuit board connected to said optical sensing element for receiving said electronic signal, thereby outputting an image of said document;
- and
- a metallic post partially embedded into said perforated structure and fixed on said scanning module case, wherein said metallic post has a first end connected to said printed circuit board such that said printed circuit board is not in direct contact with said scanning module case.
Dependencies are inferred from the claim text.