CN100476500C

CN100476500C - Scanning module capable of fine-tuning optical path

Info

Publication number: CN100476500C
Application number: CNB2004100066626A
Authority: CN
Inventors: 郑吉芳
Original assignee: Teco Image Systems Co Ltd
Current assignee: Teco Image Systems Co Ltd
Priority date: 2004-02-25
Filing date: 2004-02-25
Publication date: 2009-04-08
Anticipated expiration: 2024-02-25
Also published as: CN1661415A

Abstract

The invention provides a scanning module capable of finely adjusting an optical path, which comprises a lamp tube, a base, a photosensitive substrate, an auxiliary seat and an adjusting unit, wherein the lamp tube provides a light source required by scanning a document; the base is provided with a reflector group for receiving light rays transmitted by a scanning document and a lens for providing focusing treatment; the light output by the lens is converted into an electronic signal by the photosensitive substrate; the auxiliary seat is arranged between the photosensitive substrate and the base; the adjusting unit is used for adjusting the optical path distance between the base and the auxiliary seat and between the auxiliary seat and the photosensitive substrate; therefore, the total optical path length is adjusted, the magnification error can be corrected, or under the condition that the magnification error is allowed, the focal length is aligned by adjusting the distance between the lens and the photosensitive substrate, and better output image quality can be obtained.

Description

Scanning module capable of fine adjusting optical path

Technical field

The present invention relates to a kind of scanning module capable of fine adjusting optical path, particularly about a kind of adjustment photosensory assembly front-back direction of passing through, to adjust total optical path length or to adjust the scan module that the distance between camera lens and the sensitive substrate is focused.

Background technology

Generally with the one scan module (as the scanner or the office of computer peripheral device, the employed multifunctional paper feeding machine of family etc.) when scanning, its initial magnification is all controlled by the lens design that is positioned at scan module inside, in other words, when the one scan file places on the scan module when doing scanning, by a light source irradiation in scanning document, and receive light by scanning document transmitted by the reflector group that is positioned at scan module, at last light is reflexed to camera lens and focus on the photosensory assembly, convert the optical signalling of simulation to represent image digital signal, to finish the scan conversion of whole document image.

Above-mentioned camera lens magnification a little error can occur unavoidably on making; Moreover, the reflector group of being located in the scan module also can be because of the error that its putting position caused, make scanning document to the total optical path between photosensory assembly distance because of above-mentioned former thereby change, or difference takes place in two ends, the left and right sides, the file scan quality can't effectively be controlled, thereby have influence on the image quality of being exported at last.

As from the foregoing, above-mentioned known scan module in actual use, obviously has inconvenience and shortcoming, remains to be improved.

Summary of the invention

Fundamental purpose of the present invention, be to provide a kind of scanning module capable of fine adjusting optical path, by adjusting total optical path length to remedy the reason that the magnification error is caused, the magnification error of scan module output is closed in demand, or by adjust between camera lens and the sensitive substrate about distance remedy error so that about photosensory assembly the end light path consistent, and improve production acceptance rate and product quality thus.

Another object of the present invention, be to provide a kind of scanning module capable of fine adjusting optical path, make and to strengthen the sensitive substrate support when adjusting optical path length, effectively avoid the base plate deformation that causes easily because of locking, or avoid making the outside veiling glare invade unnecessary troubles such as photosensory assembly by the gap that is produced.

For achieving the above object, the present invention mainly provides a kind of scanning module capable of fine adjusting optical path, comprises a fluorescent tube, a pedestal, a sensitive substrate, an auxiliary block and an adjustment unit, wherein, and this fluorescent tube, required light source when scanning document is provided; This pedestal is provided with a reflector group and a camera lens, and this reflector group receives the light that this scanning document transmits, and is sent to this camera lens and is focused on processing; This sensitive substrate is done an image processing with the light that this camera lens focused on; This auxiliary block is located between sensitive substrate and the pedestal; And this adjustment unit, adjust between this pedestal and this auxiliary block and the optical path length between this auxiliary block and this sensitive substrate.

For achieving the above object, the present invention also provides a kind of scanning module capable of fine adjusting optical path, comprising: a fluorescent tube, required light source when scanning document is provided; One pedestal, be provided with a reflector group and a camera lens, this reflector group receives the light that this scanning document transmits, and is sent to this camera lens and is focused on processing, this pedestal outside is provided with a window that allows this camera lens export light, and is provided with a pilot hole in this window side; One sensitive substrate is done an image processing with the light that this camera lens focused on; One auxiliary block, be located between this sensitive substrate and this pedestal, this auxiliary block inboard is provided with a register pin, this register pin is sticked in this pilot hole, and this auxiliary block side respectively is provided with a lug, this lug inboard is provided with an internal thread, and this lug side also is extended with side plate, and is provided with a profile groove in this side plate; An and adjustment unit, comprise one first connecting portion, formed by an adjustment screw and a flange, this flange is located at this window both sides, and be provided with a fixed orifice in this flange, this adjustment screw wears this fixed orifice and this profile groove is spirally connected, and this pedestal and this auxiliary block are connected and fixed, to adjust between this pedestal and this auxiliary block and the optical path length between this auxiliary block and this sensitive substrate.

Therefore, scanning module capable of fine adjusting optical path of the present invention has following characteristics:

(1) reason that can cause regardless of the magnification error, and adjust total optical path length by adjusting lens location and adjustment unit, the magnification error of scan module output is closed in demand, and improve production acceptance rate and product quality.

(2) pass through about fine setting before and after two hold-doun nuts, the as easy as rolling off a log Charged Coupled Device (CCD) that makes all is adjusted at best focus position, and the reason error does not cause an end poor focusing.

(3) adjustment unit is simple to operate when adjusting optical path length, utilizes the adjustment nut and the hold-doun nut that are bolted on the double-screw bolt to do the corresponding adjustment in front and back, makes at the sensitive substrate of adjusting between nut and the hold-doun nut to reach the effect of adjusting optical path length.

In order to further describe feature of the present invention and technology contents, see also following about detailed description of the present invention and accompanying drawing, yet accompanying drawing only provide with reference to and the explanation usefulness, be not to be used for the present invention is limited.

Description of drawings

Fig. 1 is the light path path synoptic diagram of scanning imagery of the present invention.

Fig. 2 is the schematic perspective view of first embodiment of the invention.

Fig. 3 is the diagrammatic cross-section in the inner light path of first embodiment of the invention path.

Fig. 4 is the schematic perspective view of second embodiment of the invention.

Fig. 5 is the diagrammatic cross-section in the inner light path of second embodiment of the invention path.

Fig. 6 is the schematic perspective view of third embodiment of the invention.

Fig. 7 is the schematic perspective view of fourth embodiment of the invention.

Wherein, description of reference numerals is as follows:

1 fluorescent tube, 2 pedestals, 21 reflector group

211 first catoptrons, 212 second catoptrons 213 the 3rd catoptron

22 camera lenses, 23 light slits, 24 windows

241 pilot holes, 3 sensitive substrates, 31 Charged Coupled Devices

4 adjustment units, 41 first connecting portions 411 are adjusted nut

411a packing ring 412 double-screw bolts 411 ' are adjusted screw

412 ' flange, 4121 ' fixed orifice, 42 second connecting portions

421 ' the perforation of 421 perforation, 422 hold-down nuts

422 ' fixed screw, 43 elastic body 43a elastic bodys

5 glass, 6 auxiliary blocks, 61 lugs

62 side plates, 621 profile grooves, 63 register pins

Embodiment

Please consult Fig. 1 to Fig. 3 simultaneously.The present invention relates to a kind of scanning module capable of fine adjusting optical path, comprise a fluorescent tube 1, a pedestal 2, a sensitive substrate 3 and an adjustment unit 4, wherein:

Fig. 1 is the light path path synoptic diagram of scanning imagery of the present invention, by adjusting the longitudinal separation of sensitive substrate, promptly adjust total optical path length, can make itself and file keeping parallelism and certain apart from length, and remedy the total optical path error that error or other reason caused or the inconsistent error of two ends, left and right sides light path of making thus, thereby can access a preferable image output quality because of camera lens.

This pedestal 2 is located at the below of this fluorescent tube 1, pedestal 2 tops are provided with a light slit 23, pedestal 2 inside then are provided with a reflector group 21 and a camera lens 22, this reflector group 21 is made up of one first catoptron 211, one second catoptron 212 and one the 3rd catoptron 213, this camera lens 22 is located at the output light path path of reflector group 21, and focus on processing in order to light to reflector group 21 output, and be provided with can be for a window 24 of camera lens 22 output light in pedestal 2 outsides.

This sensitive substrate 3 is located at outside this pedestal 2, is used for the light that this camera lens 22 is focused on is done an image processing, and this sensitive substrate 3 is provided with Charged Coupled Device (CCD) 31, and it makes the optical signalling of simulation convert the digital signal of representing image to.

This adjustment unit 4 is made up of one first connecting portion 41 and one second connecting portion 42, it is used to adjust the optical path length between pedestal 2 and the sensitive substrate 3, wherein this first connecting portion 41 is located at the side in these pedestal 2 inside, camera lens 22 output light path paths, it is formed by adjusting nut 411 and double-screw bolt 412, this double-screw bolt 412 is located at window 24 both sides, and this adjustment nut 411 is bolted in double-screw bolt 412, adjusts nut 411 and is bolted in position on the double-screw bolt 412 and is used for determining optical path length between pedestal 2 and the sensitive substrate 3.

This second connecting portion 42 is located on this sensitive substrate 3, it is made up of perforation 421 and hold-down nut 422, and Charged Coupled Device 31 both sides are located in this perforation 421, wear for double-screw bolt 412, and be arranged in perforation 421 o'clock at double-screw bolt 412, sensitive substrate 3 can move up and down on double-screw bolt 412.

When first connecting portion 41 is connected with second connecting portion 42, be arranged in elastic body 43 respectively and bore a hole 421 by double-screw bolt 412, one elastic body, 43 compressions that will be sheathed on the double-screw bolt 412 up to sensitive substrate 3 are resisted against adjustment nut 411, be bolted in the double-screw bolt 412 of outstanding perforation 421 1 sides again by hold-down nut 422, sensitive substrate 3 is lock onto between adjustment nut 411 and the hold-down nut 422, pedestal 2 and sensitive substrate 3 are connected and fixed, and elastic body 43 wherein is meant spring, and before adjustment is finished as yet, (refer to adjust nut 411, sensitive substrate 3 and hold-down nut 422 position to each other) in order to produce an elastic force, by gently pushing down sensitive substrate 3 so as in the middle of adjustment process temporarily the location.

According to said structure, when scanning, on glass 5, put one scan file (figure slightly), the light source irradiation that makes fluorescent tube 1 emission is in scanning document, and by the 21 reception light that this scanning document transmitted of the reflector group in the pedestal 2, make the light that first catoptron 211 is transmitted light slit 23 reflex to second catoptron 212, reflex to the 3rd catoptron 213 by second catoptron 212 again, by the 3rd catoptron 213 light is sent to camera lens 22 at last and does the focusing processing, adjust the position up and down of sensitive substrate 3, so that the light positive that light slit comes shines well on Charged Coupled Device 31, the front and back adjustment of hold-down nut 422 can be adjusted to best focus position with Charged Coupled Device 31, and adjustment nut 411 was locked to sensitive substrate 3 directions and gets final product after adjustment was finished.And the light that this sensitive substrate 3 is focused on this camera lens 22 is done an image processing, obtain a digital signal of representing image, and camera lens 22 wherein might be because the error on making or because of the error of 21 putting positions of reflector group, make the magnification of camera lens 22 change with the variation of total optical path, thereby can remedy aforesaid error this moment by the position of adjusting camera lens 22 and the optical path length of being adjusted between camera lens 22 and the sensitive substrate 3 by adjustment unit 4.

See also Fig. 4 and shown in Figure 5, after locking, sensitive substrate 3 and pedestal 2 make sensitive substrate 3 distortion easily, and the break joint of avoiding sensitive substrate 3 to be produced when adjusting optical path length, and the veiling glare that causes the outside is invaded the Charged Coupled Device 31 on the sensitive substrate 3, therefore be provided with auxiliary block 6 in sensitive substrate 3 one sides, and make this auxiliary block 6 between pedestal 2 and sensitive substrate 3, it is a hollow strip housing that can supply light to penetrate, and be provided with lug 61 in both sides, and lug 61 is a hollow form, make double-screw bolt 412 penetrable adjustment nuts 411, elastic body 43, lug 61 and bore a hole 421, again by adjusting nut 411 with elastic body 43, sensitive substrate 3 and auxiliary block 6 lock onto to be adjusted between nut 411 and the hold-down nut 422, makes pedestal 2, auxiliary block 6 is connected and fixed with sensitive substrate 3.

In addition, adjustment nut 411 among Fig. 4 also can make packing ring 411a as shown in Figure 6 into, packing ring 411a is sheathed on the double-screw bolt 412, and sensitive substrate 3 and auxiliary block 6 are lock onto on the double-screw bolt 412 by hold-down nut 422, make elastic body 43a compression and packing ring 411a is resisted against on the pedestal 2, so that pedestal 2, auxiliary block 6 are connected and fixed with sensitive substrate 3.

See also shown in Figure 7, wherein first connecting portion 41 ' is formed by adjusting 412 ' of screw 411 ' and flange, flange 412 ' is located at window 24 both sides, and be provided with fixed orifice 4121 ' in flange 412 ', can wear fixed orifice 4121 ' so that adjust screw 411 ', and wherein window 24 sides are provided with a pilot hole 241.

Second connecting portion 42 ' is made up of perforation 421 ' and fixed screw 422 ' institute, and Charged Coupled Device 31 both sides are located in this perforation 421 ', and are used for wearing for fixed screw 422 '.

Auxiliary block 6 inboards are provided with a register pin 63, and the lug 61 that is positioned at auxiliary block 6 both sides is provided with internal thread (figure slightly) in the inboard, can be used to be spirally connected with fixed screw 422 ', and lug 61 sides are extended with side plate 62, and side plate 62 is provided with a profile groove 621.

When first connecting portion 41 ' is connected with second connecting portion 42 ', with the register pin 63 of auxiliary block 6 and the pilot hole 241 mutual clampings of window 24, and make that the side plate 62 of auxiliary block 6 both sides can be adjacent to flange 412 ', wear fixed orifice 4121 ' and be spirally connected by adjusting screw 411 ' again, so that pedestal 2 is connected and fixed with auxiliary block 6 with the profile groove 621 of side plate 62; And be arranged in the perforation 421 ' of sensitive substrate 3 on the other hand by fixed screw 422 ', and be bolted in the lug 61 of auxiliary block 6, sensitive substrate 3 and auxiliary block 6 are connected and fixed; When the optical path length that will adjust between pedestal 2 and the sensitive substrate 3, by controlling the position that adjustment screw 411 ' and profile groove 621 are spirally connected, and reach the effect that to adjust total optical path length, and remedy the total optical path error that error or other reason caused of making thus because of camera lens 22.

The above, only be the detailed description of the best specific embodiment of the present invention and graphic, but be not in order to restriction the present invention, feature of the present invention is not limited thereto, claim of the present invention should be as the criterion with appended claim scope, all embodiment that meets the spirit variation similar of the present patent application claim with it, all should be contained in the category of the present invention, those skilled in the art in the field of the invention, can think easily and variation or modify all can be encompassed in the application's the claim.

Claims

1. A scanning module capable of finely adjusting the optical path length, comprising:

A light tube, which provides the light source required for scanning documents;

A base is provided with a reflector group and a lens, and the reflector group receives the light from the scanned document and sends it to the lens for focusing;

A photosensitive substrate, which performs image processing on the light focused by the lens;

an auxiliary seat disposed between the photosensitive substrate and the base; and

An adjusting unit adjusts the optical path distance between the base and the auxiliary seat and between the auxiliary seat and the photosensitive substrate.

2. The scanning module capable of finely adjusting the optical length according to claim 1, characterized in that the photosensitive substrate is provided with a charge coupled device.

3. The scanning module capable of finely adjusting the optical length according to claim 1, characterized in that a window for the lens to output light is provided on the outside of the base, and the adjustment unit includes:

A first connection part for adjusting the optical path distance is arranged on the side of the window; and

A second connection part is arranged on the photosensitive substrate and connected to the first connection part, and the auxiliary seat is located between the first connection part and the second connection part, and the base, the auxiliary seat It is connected and fixed with the photosensitive substrate.

4. The scanning module capable of finely adjusting the optical path length as claimed in claim 3, wherein the first connecting part is a stud and an adjusting nut arranged on the outside of the base, and the adjusting nut is screwed to the stud , and the position where the adjusting nut is screwed on the stud determines the optical path distance.

5. The scanning module capable of finely adjusting the optical path length according to claim 4, wherein the second connection part is a through hole and a fixing nut provided on the photosensitive substrate, the through hole is used for the stud to pass through, and The photosensitive substrate and the auxiliary seat are locked between the fixing nut and the adjusting nut by the fixing nut.

6. The scanning module capable of finely adjusting the optical path length according to claim 5, characterized in that the auxiliary seat is a hollow strip-shaped shell that can pass through light, and has a lug on each side, and the The lug is hollow so that the stud can pass through the lug.

7. The scanning module capable of finely adjusting the optical length according to claim 6, characterized in that an elastic body is provided between the base and the auxiliary seat, and the studs are respectively passed through the elastic body, the lug and the perforation.

8. The scanning module capable of finely adjusting the optical length according to claim 7, wherein the elastic body is a spring.

9. A scanning module capable of finely adjusting the optical path length, comprising:

A light tube, which provides the light source required for scanning documents;

A base is provided with a reflector group and a lens, the reflector group receives the light from the scanned document and transmits it to the lens for focusing processing, and a window for the lens to output the light is provided on the outside of the base , and a positioning hole is provided on the side of the window;

An auxiliary seat is arranged between the photosensitive substrate and the base, a positioning pin is provided on the inner side of the auxiliary seat, and the positioning pin is engaged with the positioning hole, and a lug is provided on each side of the auxiliary seat, and the lug an internal thread is provided on the inside, a side plate extends from the side of the lug, and a split groove is formed in the side plate; and

An adjustment unit, including a first connecting part, is composed of an adjustment screw and a convex plate, the convex plate is arranged on both sides of the window, and a fixing hole is arranged on the convex plate, and the adjusting screw passes through the fixing The hole is screwed with the split groove, so that the base and the auxiliary seat are connected and fixed, so as to adjust the optical path distance between the base and the auxiliary seat and between the auxiliary seat and the photosensitive substrate.

10. The scanning module capable of finely adjusting the optical length according to claim 9, characterized in that the photosensitive substrate is provided with a charge-coupled device.

11. The scanning module with finely adjustable optical length according to claim 10, characterized in that the adjustment unit further comprises:

A second connection part is arranged on the photosensitive substrate and consists of a through hole and a fixing screw. The fixing screw passes through the through hole and is screwed with the lug, so that the photosensitive substrate is connected and fixed with the auxiliary seat.