CN1254874A

CN1254874A - Optical scanning module components

Info

Publication number: CN1254874A
Application number: CN 98122598
Authority: CN
Inventors: 蔡振财; 陈国丰
Original assignee: Mustek Systems Inc
Current assignee: Hongyou Science & Technology Co Ltd
Priority date: 1998-11-25
Filing date: 1998-11-25
Publication date: 2000-05-31
Anticipated expiration: 2018-11-25
Also published as: CN1105984C

Abstract

An optical scanning module is composed of a casing with window, a light sensor in the casing for converting the light from document to image signals, a lens set in the casing and consisting of two parallel tracks in front of said light sensor, two lenses installed to said two tracks in slide mode, and a driver for driving two lenses in opposite directions to move any one lens to light path for focusing the light from document.

Description

Optical scan module

The present invention relates to a kind of optical scan module, particularly relate to a kind of optical scan module with twin-lens.

Along with the continuous development of computer software and hardware, and the demand of image input and universal, optical scanner just is widely used.The most common in the various optical scanners with flatbed scanner, its Scanning mold assembly with can before and after the mode that moves around be installed on the below of a transparent platform, to scan a file that places the transparent platform top.Because single-lens Scanning mold assembly only has a kind of resolution, can't satisfy the demand of user to the desired different resolution of different files.Therefore, the Scanning mold assembly that has many camera lenses in the single machine of development is just bet in many researchs, to reach the purpose that makes the multiple resolution of one scan utensil.

See also Fig. 1 and Fig. 2.Fig. 1 and Fig. 2 are the synoptic diagram of existing twin-lens Scanning mold assembly 10.Scanning mold assembly 10 is installed in the optical scanner (not shown), is used for scanning the image of a file 12.Scanning mold assembly 10 includes a housing 14, which is provided with a window 16, be used for accepting the light 18 that transmits by file 12, one optical sensing means 20, be located in the housing 14, be used for file 12 is rotated into corresponding picture signal by the predetermined light that optical path transmitted 18, and a lens group 22, be located in the housing 14, be used for light 18 is focused on the optical sensing means 20.Lens group 22 includes two parallel orbits 24,26, be located at the place ahead of optical sensing means 20, two valve jackets, 32,34 usefulness slidably mode are located at respectively on two parallel orbits 24,26, two camera lenses 28,30 are located at respectively in two valve jackets 32,34, be used for light 18 is focused on the optical sensing means 20 with the different types of focusing, and one drive device 36, be located in the housing 14, be used for simultaneously towards the camera lens 28,30 of equidirectional drive two valve jackets 32,34, so that the camera lens 28 or 30 of light 18 by wherein focuses on the optical sensing means 20.

Because the demand of different resolution, two camera lenses 28,30 provide the light 18 that the different types of focusing is transmitted file 12 to focus on the optical sensing means 20, producing different resolution, and need avoid camera lens 28 and 30 mutual interference mutually during scanning, so that light 18 only passes through a camera lens 28 or 30.Because two valve jackets 32,34 move towards equidirectional, two parallel orbits 24,26 occupy very big space in housing 14 domestic demands, can avoid 28, the 30 phase mutual interference of two camera lenses, therefore cause the bulky problem of Scanning mold assembly 10.

The object of the present invention is to provide a kind of optical scan module, it has the twin-lens device that moves in the opposite direction, to solve the bulky problem of above-mentioned optical scan module.

The object of the present invention is achieved like this, and a kind of optical scan module promptly is provided, and is used for an optical scanner, the scanning document image, and it includes: a housing which is provided with a window and is used for accepting the light that transmitted by this document; One optical sensing means is located in this housing, is used for converting this document to corresponding picture signal by the predetermined light that optical path transmitted; One lens group is located in this housing, and the light that is used for that this document is transmitted focuses to this optical sensing means, and it includes: two parallel orbits, and be located in this housing and be positioned at the place ahead of this optical sensing means; Two camera lenses are installed on respectively on this two parallel orbit slidably; And one drive device, is located in this housing, is used for the arbitrary camera lens in this two camera lens is moved on this optical path, so that the light that this document transmitted focuses on this optical sensing means by this camera lens; Wherein this two camera lens light that this document is transmitted focuses on this optical sensing means with the different types of focusing, to produce different resolution.

Below in conjunction with accompanying drawing, describe embodiments of the invention in detail, wherein:

Fig. 1 and Fig. 2 are the synoptic diagram of existing twin-lens Scanning mold assembly;

Fig. 3 is the synoptic diagram of Scanning mold assembly of the present invention;

Fig. 4 is the external view of Fig. 3 lens group;

Fig. 5 and Fig. 6 are the synoptic diagram of Fig. 3 Scanning mold assembly.

See also Fig. 3.It is for the synoptic diagram of Scanning mold assembly 40 of the present invention.Scanning mold assembly 40 is used in the optical scanner (not shown), is used for scanning the image of a file 42.Scanning mold assembly 40 includes a housing 44, which is provided with a window 46, be used for accepting the light 48 that transmitted by file 42, one lens set 56 is located in the housing 44, it includes a plurality of catoptrons and is used for that light 48 is directed to optical path 52, one optical sensing means 50 and is located in the housing 44, is used for converting light 48 to corresponding picture signal, and one lens group 54 be located in the housing 44, be used for light 48 is focused to optical sensing means 50.When the image of optical scanner scanning document 42, the light 48 that file 42 transmits is by optical path 52 and lens set 56, focuses on the optical sensing means 50 and converts corresponding picture signal to.

See also Fig. 4, it is the synoptic diagram of lens group 54.Lens group 54 includes two parallel orbits 58,60, be located at the place ahead of optical sensing means 50, two

valve jackets

62,64, slidably be located at respectively on two parallel orbits 58,60, two

camera lenses

74,76 have the different types of focusing, be located at respectively in two

valve jackets

62,64, and one drive device 66 and be located in the housing 44, be used for driving two

valve jackets

62,64 the

arbitrary camera lens

74 or 76 in two camera lenses is moved to optical path 52.The light 48 that file 42 is transmitted can be focused on the optical sensing means 50 with the different types of focusing by

camera lens

74 or 76, to produce different resolution.

Drive device 66 and include two runners 68, be fixed in the two ends of two parallel orbits 58,60 in rotating mode, an annular belt 70 is set on two runners 68, be used for driving two

valve jackets

62,64, and a stepper motor 72 is used for driving annular belt 70.Because two

valve jackets

62,64 are installed on annular belt 70 corresponding both sides, therefore when stepper motor 72 rotated annular belt 70, two

valve jackets

62,64 can be driven simultaneously in the opposite direction.

See also Fig. 5 and Fig. 6, Fig. 5 and Fig. 6 utilize the synoptic diagram of

camera lens

74 or 76 for Fig. 3 Scanning mold assembly 40.Fig. 5 shows that when utilizing camera lens 74 to focus, when promptly valve jacket 62 was driven the left of track 58, valve jacket 64 can be driven the right-hand of track 60, and the light 48 that file 42 is transmitted then focuses on the optical sensing means 50 through camera lens 74.Fig. 6 shows that when utilizing camera lens 76 to focus, when promptly valve jacket 64 was driven the left of track 60, valve jacket 62 can be driven the right-hand of track 58, and light 48 then focuses on the optical sensing means 50 by camera lens 76.Because two

valve jackets

62,64 lay respectively at the reverse direction of two parallel orbits 58,60, so

camera lens

74 and 76 not mutual interference mutually, and the light 48 that file 42 is transmitted only can pass through

camera lens

74 or 76 at synchronization.

Compare with existing twin-lens Scanning mold assembly, Scanning mold assembly 40 employed twin-lenss drive simultaneously in the opposite direction by driving device 66, have therefore reduced two parallel orbits, 58, the 60 required spaces of occupying, and have also dwindled the volume of Scanning mold assembly 40.

The above only is preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to the covering scope of patent of the present invention.

Claims

1. An optical scanning module assembly, used in an optical scanner to scan document images, is characterized in that it includes:

a housing provided with a window for receiving light from the document;

A light sensing device, installed in the casing, is used to convert the light transmitted from the document through a predetermined optical path into a corresponding image signal;

A lens group, set in the casing, is used to focus the light transmitted from the document to the light sensing device, which includes:

Two parallel tracks are arranged in the housing and located in front of the light sensing device;

Two lenses are slidably installed on the two parallel rails; and

a driving device, arranged in the casing, used to move any one of the two lenses to the optical path, so that the light from the document can be focused on the light sensing device through the lens;

The two lenses can make the light from the file focus on the light sensing device in different focusing ways to produce different resolutions.

2. The optical scanning module assembly according to claim 1, wherein the two lenses are respectively installed in two casings, and the two casings are movably installed on the two parallel rails, and the driving The device drives the two lenses on the two parallel tracks through the two casings.

3. The optical scanning module assembly according to claim 1, wherein the driving device includes two wheels, which are rotatably fixed to the two ends of the two parallel tracks, and an endless belt is set on the The two rotating wheels are used to drive the two lenses, and when the endless belt is rotated, the two lenses will be driven simultaneously.

4. The optical scanning module assembly according to claim 3, wherein the two lenses of the driving device are installed on the corresponding two sides of the endless belt, so when the endless belt is rotated, the two lenses will move in the opposite direction.

5. The optical scanning module assembly according to claim 4, wherein the driving device further comprises a stepping motor, which is used to drive the endless belt.

6. The optical scanning module assembly according to claim 1, further comprising a lens set disposed in the casing, the lens set includes a plurality of reflectors for passing the light from the document through the The light path passes to the light sensing device.