Optical scanner for image system

Abstract

The invention provides an optical scanning module with linear CMOS image sensor, comprising a light source capable of giving out scanning lights, a reflection mirror group, a focus lens group and a linear CMOS image sensor comprising at least one CMOS image sensor unit, and an A / D analog-digital converter, wherein the light source after giving out the light rays is radiated on the object to be scanned, the object to be scanned reflects the light rays which become scanning light rays, and is focalized to the CMOS image sensing unit through the reflection mirror group and the focus lens group as well as is converted into an electronic signal which is converted to the digital signal through the A / D analog-digital converter, a USB signal or an LVDS signal is transmitted to the outside world so as to achieve the high speed scanning and low distortion rate, to have depth of field and to meet the requirement of convenient transportation.

Description

technical field [0001] The present invention relates to an optical scanning device of an image system, especially an optical scanning module (Optical scanning module) composed of a linear complementary metal oxide semiconductor image sensor (linear CMOS image sensor), which can be applied to image Systems such as scanners or MFPs. Background technique [0002] At present, in the imaging system (imaging system), objects are scanned by light and then converted into electronic signals for application, such as scanners, printers, fax machines, or integrated photocopying, scanning, Multi-function printers (MPF, multi-function printers) that integrate printing and faxing are the most common; most of these imaging systems have an optical scanning module (optical scanning module). The above-mentioned light source can emit light onto the picture or text to be scanned or printed, and then receive the reflected light through an image sensor component (image sensor, or image photorecep...

AI Technical Summary

Problems solved by technology

For an A4-sized object to be scanned 10, after the reflected light passes through the reflective lens 12 and the focusing lens 13 to the CCD image sensing component 16, the focal length (Focus Length) is about 1 meter, although the DOF (depth of focus) is relatively large. Can scan a little crumpled paper, but relatively also make CCDM1 bulky; And because the CCD image sensing assembly 16 is smaller than the object 10 to be scanned, it is necessary to focus the relative position of the object 10 to be scanned on the CCD image sensing assembly 16 , which increases the necessity of adjustment in assembly; but the CCD image sensing component 16 can accept low noise ratio S / N, so the colors are richer, as disclosed in JP2006-067504, US2004 / 263915, etc.

[0004] The CCD image sensing assembly 16 is developed with an array CCD (array CCD) and a linear CCD (linear CCD). The main problem of the optical scanning module CCDM that utilizes the CCD image sensing assembly 16 to form is that the CCD image The sensing component 16 requires additional electronic components to convert the analog signal converted by the CCD image sensing component 16 into a digital signal and transmit it to the outside world. This is called the back-end function of image capture; the back-end of this image capture Components required for functionality such as image 3 , if it is to be transmitted to the outside world in a low voltage differential (LVDS, Low Voltage Differential Signaling) digital format, the A / D analog-to-digital converter / transmitter 15 includes: a sequencer 14, a transmitter (Emitter) 153, an A / D D conversion unit 151 and LVDS transmission unit 152; the electronic signal generated by the CCD image sensing component 16 under the control of the sequencer 14 first sends an analog signal through the transmitter 153, and the A / D conversion unit 151 converts the analog signal into a digital signal , and the LVDS transmission unit 152 transmits the digital signal to the outside world via the connector 161 as a signal in LVDS digital format; since the CCD image sensing component 16 cannot be integrated with these image capture back-end components, it increases the complexity and Reduce reliability and relatively increase cost, hindering the development of CCDM

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