CN2354184Y

CN2354184Y - Optical scanning module components

Info

Publication number: CN2354184Y
Application number: CN 98245721
Authority: CN
Inventors: 蔡振财; 陈国丰
Original assignee: Mustek Systems Inc
Current assignee: Hongyou Science & Technology Co Ltd
Priority date: 1998-11-23
Filing date: 1998-11-23
Publication date: 1999-12-15
Anticipated expiration: 2008-11-23

Abstract

An optical scanning module assembly, which has a housing with a window on it to receive the light from the scanned document, and an optical sensing device is arranged in the housing to convert the light from the document into a corresponding image signal, Three mirrors guide the light from the document to the optical sensing device, and a lens gathers the light from the document to the optical sensing device through the movable first reflector or the movable second and Design of the third reflector, or movable third reflector, lens and optical sensing device, or movable lens and optical sensing device, the optical path between the document and the lens can be adjusted to correct the optical path error .

Description

Optical scan module

The utility model relates to a kind of optical scan module, particularly relates to a kind of optical scan module with adjustable light path.

Plate scanner is used in various computer systems at large, be used for file data is converted into picture signal with the input computing machine, and optical scan module is the element of most critical in the plate scanner.A common optical scan module includes a housing, which is provided with a window and be used for accepting the light that transmits by this document, one optical sensing devices is located in this housing, the light that is used for that this document is transmitted converts corresponding picture signal to, and the light-ray condensing that several eyeglasses are used for this document is transmitted is in this optical sensing devices.

The resolution of general optical scan module is a fixed value, and it is by optical scan module the magnification of image and the resolution of optical sensing means to be decided.Optical scan module then is by its lens to the magnification of image, and file is to the object distance between the lens, and lens to the image distance between the optical sensing means decides.If the object distance of optical scan module or image distance produce error in assembling process, the resolution of optical scan module will be affected.

Along with the user is more and more stricter to the quality requirements of scan image, manufacturer also constantly makes great efforts to dwindle the error range of optical scan module magnification.Usually elements such as the lens of optical scan module and reflective eyeglass all can have the tolerance in the manufacturing, and these lens and eyeglass installation site and the angle in optical scan module also can produce error in the process of assembling, and the tolerance of these elements and locational error all can influence the magnification of optical scan module.When the error of optical scan module magnification was limited in more and more littler scope, these tolerances and error can make the efficient of product and quality descend hastily, and correction work is increased in large quantities, and whole manufacturing cost also thereby improve.

The purpose of this utility model is to provide a kind of structural design of light modulation journey of utilizing to increase or reduce the path-length error of light path with the calibrating optical Scanning mold assembly, can reduce the workload of calibration.

The purpose of this utility model is achieved in that promptly provides a kind of optical scan module, is arranged in an optical scanner, and this optical scan module includes: a housing which is provided with a window that is used for accepting to be transmitted by this document light; One light that file is transmitted converts the optical sensing means of corresponding picture signal to, is located in this housing; One light that this document is transmitted reaches the lens set of this optical sensing means, comprises that several are located at the catoptron in this housing; One with light focusing that this document the transmitted lens combination to this optical sensing means, be located in this housing, and be located between this optical sensing means and this lens set, wherein this lens combination and this optical sensing means are fixed in this housing in the mode that can move simultaneously, or including a catoptron in this lens set at least is fixed in this housing in a movable manner.This document to the object distance of this lens combination is adjusted, to proofread and correct the cumulative errors that each element was produced of this optical scan module.

The advantage of the utility model device is, because this optical scan module has the structural design of adjustable light path, and after finishing, each element assembling still can proofread and correct the error that total system produces, and do not need to re-assembly again after each element dismounting, therefore reduce whole manufacturing cost in large quantities.

Below in conjunction with accompanying drawing, describe embodiment of the present utility model in detail, wherein:

Fig. 1 is the outside drawing of the utility model scanner;

Fig. 2 is the synoptic diagram of the optical scan module of Fig. 1 scanner;

Fig. 3 is an embodiment of the optical scan module of the adjustable light path of the utility model;

Fig. 4 is another embodiment of the optical scan module of the adjustable light path of the utility model;

Fig. 5 is an embodiment again of the optical scan module of the adjustable light path of the utility model;

Fig. 6 is the another embodiment of the optical scan module of the adjustable light path of the utility model;

Fig. 7 is the front elevation of the valve jacket shown in Fig. 6;

Fig. 8 is the vertical view of the valve jacket shown in Fig. 6;

Fig. 9 is the side view of the valve jacket shown in Fig. 6.

See also Fig. 1.It is the outside drawing of scanner 10 of the present utility model.Scanner 10 includes a transparent window 12 and is used for putting a file 14 to be scanned, and an optical scan module 20 is located in the scanner 10 in a movable manner, is used for the image of scanning document 14.

See also Fig. 2.It is the synoptic diagram of the optical scan module 20 of Fig. 1 scanner 10.Optical scan module 20 includes a housing 22, which is provided with a window 24 and be used for accepting the light that file 14 transmits, one light source 26 is located at and is used for shot file 14 in the housing 22, one optical sensing devices 28 is located in the housing 22, it is a carrier coupling device (charge coupled device), be used for converting the light that file 14 transmits to corresponding picture signal, three

catoptrons

29,30 and 31 are used for light guiding optical sensing devices 28 that file 14 is transmitted, and one lens 32 be located between catoptron 31 and the optical sensing devices 28, the light-ray condensing that is used for file 14 is transmitted is to optical sensing devices 28.When scanner 10 scanning documents 14, the light that file 14 transmits by three

catoptrons

29,30 and 31 and lens 32 focus to optical sensing means 28, and convert corresponding picture signal to.

See also Fig. 3 to Fig. 6.Fig. 3 to Fig. 6 is four kinds of embodiment of the optical scan module of the adjustable light path of the utility model.In the optical scan module 20 shown in Figure 3, its

catoptron

30 and 31 is movable.Optical scan module 20 promptly increases or reduces light path by the

catoptron

30 and 31 that left and right horizontal ground moves simultaneously.Because the mobile of catoptron 30 can change the light light path that is transmitted by catoptron 29, and the mobile light light path that passes to optical sensing devices 28 that can change of catoptron 31, therefore when proofreading and correct a specific path-length error value, a half-distance that only needs

catoptron

30 and 31 to be moved simultaneously this path-length error value gets final product.

In the optical scan module 20 shown in Figure 4, its catoptron 29 is movable, and optical scan module 20 is promptly proofreaied and correct path-length error by left and right horizontal ground mobile mirror 29.Pass to catoptron 30 because the major function of catoptron 29 is the light that will be transmitted by file 14, therefore after catoptron 29 moved, the scanning position on the transparent window 12 of its pairing scanner 10 also can move.

Optical scan module 20 shown in Figure 5 is by vertically mobile mirror 31, lens 32 and optical sensing devices 28 are proofreaied and correct path-length error up and down simultaneously.20 of optical scan modules shown in Figure 6 are to increase or reduce light path by left and right horizontal ground while mobile lens 32 and optical sensing devices 28.At this moment, include a valve jacket 48 in the optical scan module 20 in addition and be located in a movable manner in the housing 22 of optical scan module 20, be used for installing lens 32 and optical sensing devices 28.

See also Fig. 7, Fig. 8 and Fig. 9.Fig. 7 is the front elevation of valve jacket shown in Figure 6 48, and Fig. 8 is the vertical view of valve jacket 48, and Fig. 9 then is the side view of valve jacket 48.Including two adjustment screws 56 in the valve jacket 48 is used for the two ends of this valve jacket 48 are fixed in the housing 22 in adjustable mode, and two spring 58 be located at two respectively and adjust between screws 56 and valve jacket 48 two ends, be used for fixing valve jacket 48, two ends rock to prevent that valve jacket 48 from producing.Because lens 32 are that the light focusing that is used for being transmitted by file 14 is to optical sensing devices 28, distance between lens 32 and the optical sensing devices 28 must be maintained fixed, therefore when utilizing mobile lens 32 to change object distance, optical sensing devices 28 must move thereupon, and is constant to guarantee image distance.Behind the installing valve jacket 48, can under the situation that does not change image distance, change object distance in the optical scan module 20.

Claims

1. An optical scanning module assembly, which is located in an optical scanner, is characterized in that the optical scanning module assembly includes: a housing, which is provided with a window for receiving light from the document ; a light sensing device that converts the light from the document into a corresponding image signal is located in the housing; a lens group that transmits the light from the document to the light sensing device includes several devices A reflector in the housing; a lens group that focuses the light from the document to the light sensing device, located in the housing, and between the light sensing device and the lens group, the The lens group and the light sensing device are fixed in the casing in a movable manner at the same time, or the lens group includes at least one reflector and is fixed in the casing in a movable manner.

2. The optical scanning module assembly according to claim 1, wherein the light sensing device is a charge coupled device that converts the light from the document into a corresponding image signal.

3. The optical scanning module assembly according to claim 1, wherein the lens group and the light sensing device are installed in a shell, and the shell is fixed in the casing in a movable manner.

4. The optical scanning module assembly according to claim 2, further comprising two adjusting screws for fixing the two ends of a casing in the housing in an adjustable manner, and for fixing the The two ends of the shell cover are used to prevent the two springs from shaking of the shell cover, and are respectively arranged between the two adjusting screws and the two ends of the shell cover.