Multiple-background device for a scanner and calibration device utilizing the same principle
AssigneeAvision Inc.
InventorBo-Hsiang Wang
Life of this patent
Estimating the term…
Abstract
A multiple-background device for a scanner and a calibration device utilizing the same principle are disclosed. The multiple-background device includes a shaft, a low-reflectance portion and a high-reflectance portion are formed along the length of the shaft. Thereby the shaft can provide various background colors, and the optical module can acquire a plurality of scan lines by means of rotating the shaft for image calibration.
Claims18
A multiple-background device for a scanner to provide an optical module with multiple scan backgrounds, comprising:
- a rotating shaft rotatably disposed on a position opposite to said optical module, having:
- a low reflectivity area formed axially on a surface of said rotating shaft;
- a high reflectivity area formed axially on a surface of said rotating shaft and adjacent to said low reflectivity area;
- and
- a power source driving said rotating shaft so that said low reflectivity area and said high reflectivity area are selectively facing said optical module;
- wherein said rotating shaft is a prism.
A multiple-background device for a scanner to provide an optical module with multiple scan backgrounds, comprising:
- a rotating shaft rotatably disposed on a position opposite to said optical module, having:
- a low reflectivity area formed axially on a surface of said rotating shaft;
- a high reflectivity area formed axially on a surface of said rotating shaft and adjacent to said low reflectivity area;
- and
- a power source driving said rotating shaft so that said low reflectivity area and said high reflectivity area are selectively facing said optical module;
- wherein said low reflectivity area is a trough formed axially along said rotating shaft.
A calibration device for a scanner for shading correction of an optical module, comprising:
- a rotating shaft rotatably disposed on a position opposite to said optical module and having a surface area of a specific light reflection coefficient;
- and
- a power source driving said rotating shaft to rotate relatively to said optical module, allowing said optical module to capture a plurality of scan lines therefrom for shading correction;
- wherein said rotating shaft is a prism.
Dependencies are inferred from the claim text.