CN2509592Y - Scanning apparatus capable of changing light path length - Google Patents
Scanning apparatus capable of changing light path length Download PDFInfo
- Publication number
- CN2509592Y CN2509592Y CN01271292U CN01271292U CN2509592Y CN 2509592 Y CN2509592 Y CN 2509592Y CN 01271292 U CN01271292 U CN 01271292U CN 01271292 U CN01271292 U CN 01271292U CN 2509592 Y CN2509592 Y CN 2509592Y
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- China
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- image information
- clear glass
- scanister
- original text
- path length
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Abstract
The utility model provides a scanning apparatus capable of changing light path length, which comprises a glass viewing window for placing the files to be scanned, a light source that can shine the files to be scanned to produce image information, a reflector set that has at least one reflector for receiving and reflecting the image information, a lens module that is used for receiving and focalizing the image information reflected from the reflector set, a light sensing and detecting element which receives the focalized image information, and at least one transparent glass which is assembly arranged between the lens module and the glass viewing window so as to make the image information through or not through the transparent glass according to the type of files to be scanned. The transparent glass can rotate or move so as to change the assembly angle or the assembly position of the transparent glass. Thus, according to the type of the files to the scanned, the utility model adjusts the configuration of the transparent glass so as to make the image information through or not through the transparent glass, therefore realizing the aim of changing the length of the light path.
Description
Technical field
The utility model relates to a kind of scanister, particularly relates to a kind of scanister that can be used for changing the translucent element of optical path length of being furnished with.
Background technology
General image-forming principle is that in optical theory, lens imaging is essential to be satisfied: the relational expression of 1/p+1/q=1/f.Wherein p represents object distance; Q represents image distance; F represents the focal length of lens.
The imaging results of scanister also is to satisfy the above-mentioned relation formula.Wherein the summation of object distance and image distance (p+q) is called as total optical path.
Existing plat form type scanning apparatus is described as follows in order to the light path of scanning reflection original text, and as shown in Figure 1, it is the light path synoptic diagram of scanning reflection original text 12.This reflection original text 12 is to be flattened on the glass vision panel 18.One light source 11 is with the scanning position 13 of irradiate light at this reflection original text 12, and light reflected is called as image information 14.This image information 14 reflects in one group of reflector group 15 advances, and after passing a lens module 16, focuses on the Photosensing Units 17.This Photosensing Units 17 can be charge-coupled device (CCD) (CCD).
Wherein, this image information 14 is not defined as object distance p through the stroke before this lens module 16.This image information 14 is defined as image distance q at the stroke of 17 of this lens module 16 and this Photosensing Units.The summation of this object distance and this image distance is a total optical path.
Existing plat form type scanning apparatus is described as follows in order to the light path that scanning penetrates original text, and as shown in Figure 2, it penetrates the light path synoptic diagram of original text 19 for scanning.It is fixing by clamper 21 that this penetrates original text 19, and be placed on this glass vision panel 18, and this moment, this penetrated original text 19 and glass vision panel 18 at a distance of a bit of space D.One light source 22 is located at the top that this penetrates original text 19, and 22 irradiations of this light source this penetrate the light that penetrates that original text 19 produced and be defined as image information 23.This image information 23 reflects in one group of reflector group 15 advances, and after passing a lens module 16, focuses on the Photosensing Units 17.
Wherein, this image information 23 is not defined as object distance p ' through the stroke before this lens module 16.This image information 23 is defined as image distance q ' at the stroke of 17 of this lens module 16 and this Photosensing Units.The summation of this object distance and this image distance is a total optical path.
The reflection original text is compared as follows with the light path that penetrates original text, comparison diagram 1 and Fig. 2, because the not change of distance of this lens module 16 and 17 of Photosensing Units, so q=q '.And penetrate between original text 19 and the glass vision panel 18 because of an intersegmental distance is arranged, so make p '＞p.For total optical path: p '+q '＞p+q.
Figure 3 shows that relatively synoptic diagram of light path.The position of obviously seeing this reflection original text 12 among the figure is different with the position that penetrates original text 19.More specifically, the total optical path (p+q) that this reflection original text 12 is caused is shorter, and it is longer to penetrate the total optical path that original text 19 caused (p '+q ').
Can obtain to know image when the scanner of prior art need satisfy scanning reflection original text 12, and scanning also can obtain to know image when penetrating original text 19.But known under the constant situation of image distance and focal length by Fig. 3, reflection original text 12 is inequality with the total optical path that penetrates original text 19, so same scanister can't be with making reflection original text 12 and the resolution and the enlargement ratio that penetrate original text 19 all reach optimized situation.And on production line, the nargin that can cause the scanister focusing to adjust diminishes, the situation that causes product percent of pass to reduce.
Existing solution is to adopt the lens module 16 with big depth of field to revise the imaging problem that the light path difference is produced.But the camera lens cost that the depth of field is big is higher, and manufacturing cost is improved, and on the big lens aperture of the depth of field, can have influence on the raising of sweep velocity.
The utility model content
The purpose of this utility model is to provide a kind of scanning that optical path length fills that changes, and its design concept is that the distance of utilizing light refraction to produce changes, and changes the optical path length of image information, to address the above problem.
The purpose of this utility model is achieved in that promptly provides a kind of scanister that changes optical path length, includes: one for the glass vision panel of putting a file to be scanned; Thereby one in order to shine the light source that file to be scanned produces image information; One reflector group has a slice at least in order to receive and to reflect the catoptron of described image information; One in order to receive the lens module of image information that described reflector group reflects and focusing; One Photosensing Units in order to image information behind the collectiong focusing; Wherein, described scanister also comprises at least one clear glass, and its group is located between described lens module and the described glass vision panel, with the kenel according to file to be scanned, selects to make described image information to pass through or do not pass through described clear glass.
So, when scanning penetrates original text, because of having long object distance, so this image information is not passed through clear glass; And when strafing original text, because of object distance less, so image information is by clear glass, to reach the purpose that increases optical path length.
The advantage of the utility model device is that it can change optical path length, to satisfy the scanning demand of different types of contribution, therefore can reach same scanister with making reflection original text and the resolution and the enlargement ratio that penetrate original text all reach optimized situation.In addition, with regard to actual production, light path is adjusted efficient and can be improved, and penetrate original text and reflect original text with same CCD camera lens, so need not select the bigger camera lens of the depth of field for use, the aperture of camera lens is strengthened, both the camera lens cost can be reduced thus, sweep velocity can be improved again.
Description of drawings
Fig. 1 is the light path synoptic diagram of existing scanister scanning reflection original text;
Fig. 2 penetrates the light path synoptic diagram of original text for existing scanister scanning;
Fig. 3 is that the light path of Fig. 1, Fig. 2 compares synoptic diagram;
Fig. 4 is the structural representation of the utility model in plat form type scanning apparatus;
Fig. 5 penetrates the light path synoptic diagram of original text for the utility model scanning;
Fig. 6 is the light path synoptic diagram of the utility model scanning reflection original text;
Fig. 7 is that the utility model is to penetrating original text and the light path comparison diagram that reflects original text;
Fig. 8 is that the utility model another kind is to penetrating original text and the light path comparison diagram that reflects original text;
Fig. 9 applies to the combination of paper feeder and platform-type scanner for the utility model.
Embodiment
Structure in plat form type scanning apparatus of the present utility model as shown in Figure 4, it is the preferred embodiment structural representation in plat form type scanning apparatus of the present utility model.It comprises a light source 31, one group of reflector group 41, a lens module 51, a Photosensing Units 61 and clear glass 71.Shown in figure, more than each assembly all organize the below that is located at a glass vision panel 81.
Wherein this reflector group 41 is made up of one first catoptron 42, one second catoptron 43 and one the 3rd catoptron 44.The fix assembling (for example being assembled in the ray machine) of formula of this lens module 51 and this Photosensing Units 61 is maintained fixed this lens module 51 and the spacing of this Photosensing Units 61.
It is between this lens module 51 and reflector group 41 that the group of this clear glass 71 is established the position.It should be noted that this clear glass 71 is movable.That is, this clear glass 71 can be by the mode of rotating or moving, and the change group establishes angle and group is established the position.And the group of this clear glass 71 is established the state change, be to pass through servo motor, step motor, solenoid valve, or other equivalence mechanisms reaches.
One of state of this clear glass 71 is horizontal, forms the state that does not face one another with this lens module 51.Another state of this clear glass 71 is vertical (position shown in dotted line), forms the state that faces one another with this lens module 51.Perhaps, this clear glass 71 can have between vertical and horizontal between another state again.So, image information can be changed by the configuration of adjusting clear glass 71 by the effective length of clear glass 71.
The utility model to the scanning that penetrates original text as shown in Figure 5, it penetrates the light path synoptic diagram of original text 91 for scanning.When present embodiment scans this and penetrates original text 91, earlier this clear glass 71 is adjusted to horizontality.
This penetrates the top that original text 91 cooperation clampers 93 are placed on glass vision panel 81, and this top that penetrates original text 91 sets a light source 82 in addition.Wear to penetrate when light source 82 and promptly form image information 94 after this penetrates original text 91.This image information 94 advances in the reflector group 41, and advances in these reflector group 41 internal reflections.After this image information 94 is spread out of reflector group 41,, and receive by this Photosensing Units 61 after the line focus promptly by this lens module 51.It should be noted that in the present embodiment image information 94 is not passed this clear glass 71.
The utility model to the reflection original text scanning as shown in Figure 6, it is the light path synoptic diagram of scanning reflection original text 92.When present embodiment scans this reflection original text 92, earlier this clear glass 71 is adjusted to upright group and establishes state.
This reflection original text 92 pastes the surface, top that is placed on this glass vision panel 81.When the light of light source 31 shines the scanning position of reflection original text 92 and promptly forms image information 95 through reflection.This image information 95 advances in this reflector group 41, just advances in these reflector group 41 internal reflections.Treat that this image information 95 is spread out of reflector group 41, pass this clear glass 71 earlier, receive and focus on by this lens module 51 again, receive by this Photosensing Units 61 at last.
Passing original text compares with the light path that reflects original text, as Fig. 5 and shown in Figure 6, except the group of this clear glass 71 is established the state difference, this penetrates original text 91 because of exceeding glass vision panel 81, so 41 of file to be scanned and reflector group, this image information 94 that penetrates original text 91 has more a bit of length than image information 95 of reflection original texts 92.
As shown in Figure 7, it is the light path comparison diagram of the utility model to penetrating original text 91 and reflecting original text 92.Dotted line is in order to the enforcement state of expression to reflection original text 92 among the figure.
Show the optical path length that this clear glass 71 and the image information 95 that reflects 92 of original texts are advanced among the figure, less than this clear glass 71 and penetrate the optical path length of the image information 94 of 91 of original texts.When these image information 95 these clear glasses 71 of process, because light path produces refraction effect, so can increase by one section optical path length.
So select, can make to equate the optical path length of the image information 95 of passing this clear glass 71 with the optical path length of the image information 94 of not passing this clear glass 71 by the thickness of this clear glass 71.So under the state that this lens module 51 and the spacing of Photosensing Units 61 are fixed, make this image information that penetrates original text 91 94 not by this clear glass 71, and the image information 95 that should reflect original text 92 is passed through clear glass 71, can on same scanister, reach scanning and penetrate original text 91 and reflection original text 92, all obtain the effect of optimum resolution.
Shown in Figure 8, it is to penetrate original text 91 and the another kind of light path comparison diagram that reflects original text 92.Because the refraction effect that the change of object distance is a light passes this clear glass 71 causes, therefore can utilize the rotational angle (non-90 degree) of clear glass 71, make light when passing this clear glass 71, improve optical path length, in order to mate the image distance length between this lens module 51 and the Photosensing Units 61; Or mate the focal length of this lens module 51.
In Fig. 5 and platform-type scanner shown in Figure 6, because this penetrates original text 91 and is placed on the height that this reflection original text 92 of aspect ratio on the glass vision panel 81 is placed on the glass vision panel 81 and exceeds 1mm, therefore on making, the desirable 3mm of clear glass 71 thickness that is set makes light increase optical path length when passing clear glass 71.
As shown in Figure 9, it is that paper feeder 96 is implemented state with the combination of platform-type scanner.Paper feeder 96 shown in the figure is arranged on the glass vision panel 81, and is attached to glass vision panel 81 surfaces with a transparent guide plate 97.When carrying out the scanning of file 98, file 98 is pasting transparent guide plate 97 and is passing the U-shaped passage.Because the scanning position on this paper feeder 96 has exceeded the height of this transparent guide plate 97 than the scanning position of platform-type scanner, approximately is 1.7mm, so during the manufacturing scanner, just take the clear glass 71 of thickness 5mm.
The platform-type scanner of the clear glass 71 of thickness 3mm is equipped with in the above inside, with inside the platform-type scanner of the clear glass 71 of thickness 5mm is housed, and it is two different scanners.
Further, can be in a platform-type scanner two clear glasses 71 of assembly.For example install the clear glass 71 and the thick clear glass 71 of a slice 2mm of a slice 3mm thickness.When mismatching paper feeder 96 uses, the user selects the clear glass 71 of used thickness 3mm when scanning reflection original text 92, passes to increase optical path length for light; And when cooperating paper feeder 96 to use, then select the clear glass 71 of used thickness 3mm and the clear glass 71 of thickness 2mm, and make two blocks of clear glasses 71 overlapping to constitute thickness 5mm, so when reflecting the scanning of original text 92, can make the clear glass 71 of light, reach the purpose that improves optical path length through thickness 5mm.
In like manner, in platform-type scanner, also can install three or three above thickness differences/or identical clear glass 71, to cooperate the demand in the various uses.
It should be noted that, though with clear glass 71 as between reflector group 41 and the lens module 51 being preferable mode (because the size of clear glass 71 can minimize), but clear glass 71 is arranged on the light path between the reflector group 41, or clear glass 71 is arranged between reflector group 41 and the glass vision panel 81, also be feasible mode.Generally speaking, so long as clear glass 71 is arranged on the light path between glass vision panel 81 and the lens module 51, can reach effect of the present utility model.
By above enforcement of the present utility model, can reach the purpose that changes optical path length significantly, with the scanning demand of the contribution that satisfies different kenels, therefore can reach same scanister with making reflection original text 92 and the resolution and the enlargement ratio that penetrate original text 91 all reach optimized situation.In addition, has the U type automatic paper feeder of little form applicable on the platform scanner device with big glass vision panel.
With regard to actual production, light path is adjusted efficient and can be improved in addition, and penetrates original text and reflect original text with same CCD camera lens, so need not select the bigger camera lens of the depth of field for use, the aperture of camera lens is strengthened, and both can reduce the camera lens cost in view of the above, can improve sweep velocity again.
Claims (9)
1. the scanister that can change optical path length includes: a glass vision panel for storing one file to be scanned; Thereby one in order to shine the light source that file to be scanned produces image information; One reflector group has a slice at least in order to receive and to reflect the catoptron of described image information; One in order to receive the lens module of image information that described reflector group reflects and focusing; One Photosensing Units in order to image information behind the collectiong focusing; It is characterized in that described scanister also comprises at least one clear glass, its group is located between described lens module and the described glass vision panel, with the kenel according to file to be scanned, selects to make described image information to pass through or do not pass through described clear glass.
2. the scanister that changes optical path length as claimed in claim 1 is characterized in that, described clear glass is rotating.
3. the scanister that changes optical path length as claimed in claim 1 is characterized in that, described clear glass is for movably.
4. the scanister that changes optical path length as claimed in claim 1 is characterized in that, the clear glass when described scanister scanning penetrates original text is positioned at the position that image information can not be passed its clear glass.
5. the scanister that changes optical path length as claimed in claim 1 is characterized in that, the clear glass during described scanister scanning reflection original text is positioned at the position that image information can be passed its clear glass.
6. the scanister that changes optical path length as claimed in claim 5 is characterized in that, when described scanister was mismatched paper feeder and carried out the scanning reflection original text, being provided with the thickness that image information is passed in it was the clear glass of 3mm.
7. the scanister that changes optical path length as claimed in claim 5 is characterized in that, when described scanister cooperated paper feeder to carry out the scanning reflection original text, being provided with the thickness that image information is passed in it was the clear glass of 5mm.
8. the scanister that changes optical path length as claimed in claim 5, it is characterized in that, when described scanister cooperates paper feeder to carry out the scanning reflection original text, be provided with in it and make clear glass that image information is passed and that form by the clear glass that the thickness clear glass that is 3mm and thickness are 2mm.
9. the scanister that changes optical path length as claimed in claim 1, it is characterized in that, described at least one clear glass, group is located between described lens module and the described reflecting module, with kenel according to file to be scanned, select to make described image information by or the described clear glass that do not pass through.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01271292U CN2509592Y (en) | 2001-12-24 | 2001-12-24 | Scanning apparatus capable of changing light path length |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01271292U CN2509592Y (en) | 2001-12-24 | 2001-12-24 | Scanning apparatus capable of changing light path length |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2509592Y true CN2509592Y (en) | 2002-09-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN01271292U Expired - Lifetime CN2509592Y (en) | 2001-12-24 | 2001-12-24 | Scanning apparatus capable of changing light path length |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2509592Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004088391A1 (en) * | 2003-03-31 | 2004-10-14 | Beijing Starshine Tongyuan Digital System Co., Ltd | Books dismargin scanner |
| CN113125450A (en) * | 2021-04-20 | 2021-07-16 | 江苏善果缘智能科技有限公司 | Scanning device for product surface detection and assembling method thereof |
-
2001
- 2001-12-24 CN CN01271292U patent/CN2509592Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004088391A1 (en) * | 2003-03-31 | 2004-10-14 | Beijing Starshine Tongyuan Digital System Co., Ltd | Books dismargin scanner |
| CN113125450A (en) * | 2021-04-20 | 2021-07-16 | 江苏善果缘智能科技有限公司 | Scanning device for product surface detection and assembling method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20111224 Granted publication date: 20020904 |