CN1093348C - Scanning components with variable optical pathlength - Google Patents

Abstract

The invention discloses a scanning component with variable optical path, which comprises a shell, a photosensitive device arranged in the shell, a lens group and a plurality of lenses, wherein the lens group is provided with a first end and a second end, the plurality of lenses at least comprise a movable first lens used for changing the optical path from a scanned file to the photosensitive device, so that the light transmitted by the file is transmitted to the photosensitive device from a first optical path or a second optical path, and the distance from the first optical path to the photosensitive device through the lens group is different from the distance from the second optical path to the photosensitive device through the lens group, therefore, the photosensitive device can generate different resolutions when scanning the file, and the resolution of one scanning component is changed in a simple lens moving mode.

Description

Scanning components with variable optical pathlength

technical field

The invention relates to a scanning component, especially a scanning component with variable optical path.

Background technique

Most of the traditional scanning components use a fixed optical path to focus the image of a document onto a photosensitive device through a focusing lens to scan the document. This fixed optical path scanning method will not cause any trouble for scanning documents that are generally text-based, but if you need to scan some special documents such as art calligraphy and painting, pictures or color negatives at a higher resolution , the fixed optical path of traditional scanning components cannot be changed, so the resolution is not easy to improve.

Contents of the invention

The main purpose of the present invention is to provide a scanning unit with a variable optical path, which can change the direction of the light passing through the focusing lens to change the resolution of the scanning unit so as to overcome the limitation of the conventional scanning unit.

In order to achieve the purpose of the above invention, the present invention is a scanning assembly with variable optical path, which is composed of a housing, a photosensitive device, a lens group, a plurality of mirrors and a light source arranged in the housing, and is characterized in that: the housing The body has a first scanning position, the photosensitive device scans the light transmitted from the scanned document from the first scanning position, and the plurality of lenses guide the light transmitted from the document to the photosensitive device, so The above-mentioned lens group has a first end and a second end, and focuses the light transmitted from the document on the photosensitive device;

The light source is used to generate light to irradiate the document;

Among them, at least one movable first lens is included in the plurality of lenses, which is used to change the optical path between the document and the photosensitive device, so that the light transmitted from the document can be changed from a first optical path or a second optical path. On the first optical path, the light from the document will pass through the lens group through the first end of the lens group and focus on the photosensitive device, while the second light On the way, the light from the document passes through the lens group through the second end of the lens group and focuses on the photosensitive device.

The distance from the first optical path to the photosensitive device through the lens group is different from the distance from the second optical path to the photosensitive device through the lens group, so that the photosensitive device produces different resolutions when scanning documents.

The above-mentioned first mirror can be a double-sided reflector, which is arranged between the lens group and the photosensitive device. In the first optical path, the front reflector of the double-sided reflector will transmit the document to The incoming light is reflected to the first end of the lens group, and then the negative reflector of the double-sided reflector will reflect the light that passes through the lens group and returns to the photosensitive device through other lenses. During the optical path, the double-sided reflector is moved so that the light from the document passes through other lenses to the first and second ends of the lens group, and then passes through the lens group to reach the photosensitive device.

The above-mentioned casing can also have a second scanning position. At this time, the plurality of lenses passed by the second optical path can further include a movable second lens. A lens can be driven by a driving device, and it can be moved to another position so that light from a second document located at the second scanning position can pass through the moved second lens and the second optical material. Other lenses are passed to the photosensitive device.

A scanning component with variable optical path of the present invention is composed of a casing, a photosensitive device, a lens group, a lens and a light source arranged in the filling body, wherein:

The housing has a first scanning position and a second scanning position;

The photosensitive device is composed of a first photosensitive device and a second photosensitive device, wherein the first photosensitive device scans the light transmitted from the first scanning position of a first document, and the second photosensitive device scans a light from the second scanning position in the second file;

The lens group is arranged between the first and second photosensitive devices, and has a first end and a second end; the lens is composed of a movable first lens and a movable second lens, Wherein the movable first lens guides the light transmitted from the first document to the first end of the lens group, and focuses on the first photosensitive device through the lens group, and the movable second lens will The light from the second document is guided to the second end of the lens group and focused on the second photosensitive device through the lens group;

The light source is used to generate light to irradiate the document;

When the light from the first document is directed to the first end of the lens group by the first lens, the second lens will be moved away so that the light from the first document can be focused through the lens group On the first photosensitive device, when the light transmitted from the second document is guided by the second lens to the second end of the lens group, the first lens will be removed to allow the light transmitted from the second document The light rays can be focused on the second photosensitive device through the lens group.

The design of the variable optical path of the present invention can change the resolution of a scanning assembly with a very simple lens movement mode, and the photosensitive devices and lens groups used in these designs are all existing components, so there is a high cost in manufacturing. Advantages of low cost and simple manufacture.

Description of drawings

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

FIG. 1 is a schematic diagram of the appearance of the scanning system of the present invention;

Figures 2 to 4 show three different optical paths within the scanning assembly of Figure 1;

Fig. 5 is an internal structural diagram of another embodiment of the scanning assembly in Fig. 1;

FIG. 6 is another optical path of the scanning component in FIG. 5 .

Detailed ways

Please refer to FIG. 1 . FIG. 1 is a schematic diagram of the appearance of the scanning system 10 of the present invention. Scanning system 10 comprises a casing 12, a transparent platform 14 is positioned at the upper end of casing 12 and is used for placing the document 16 to be scanned, and a film platform 17 is positioned at the front end of casing 12 and is used for placing the negative film 19 to be scanned, and a front opening 15 is positioned at casing. The front end of 12 is used for inserting the film platform 17 and the film 19 above it, and a scanning unit 18 is used for scanning the document 16 on the transparent platform 14 or the film 19 on the film platform 17 .

Please refer to FIG. 2 to FIG. 4 , which respectively show the first optical path 34 , the second optical path 36 and the third optical path 46 in the scanning unit 18 in FIG. 1 . The scanning unit 18 includes a housing 27, the upper end of which is provided with an upper scanning hole 21 for scanning the document 16 on the transparent platform 14, and the lower end is provided with a lower scanning hole 23 for scanning the negative film 19 on the negative film platform 17 . The scanning unit 18 further includes an upper side light source 38 for illuminating the document 16 to generate reflected light for scanning, a lower side light source 44 for illuminating the negative 19 to generate transmitted light for scanning, and a photosensitive device 25 located in the casing Inside the body 27, it is used to scan the light from the upper scanning hole 21 of the document 16 or the light of the negative film 19 from the lower scanning hole 23, a movable double-sided reflector 26, and two fixed reflectors 22 And 24, a movable single-sided reflector 20, a lens group 28, which includes a first end 30 and a second end 32, used for focusing the light transmitted by the document 16 or negative film 19 on the photosensitive device 25 , and a driving device (not shown), used to drive the movable double-sided mirror 26 and the single-sided mirror 20, respectively. For the driving device, reference may be made to the new patent No. 114192 and the US patent No. 5574274.

There are two ways to scan the document 16 : it can be scanned through the first optical path 34 shown in FIG. 2 or the first optical path 36 shown in FIG. 3 . The difference between the first optical path 34 and the second optical path 36 lies in the position of the movable double-sided reflector 26. In these two optical paths, the movable single-sided reflector 20 is maintained at a fixed position. Location. FIG. 2 shows that in the first optical path 34 , the reflected light generated by the document 16 is reflected by the first surface 40 of the double-sided mirror 26 to the first end 30 of the lens group 28 . After being focused by the lens group 28 , the light will enter the photosensitive device 25 along the mirrors 24 , 22 , the single-sided mirror 20 , and the second surface 42 of the double-sided mirror 26 . Figure 3 shows that in the second optical path 36, the double-sided reflector 26 will be removed so that the reflected light generated by the document 16 can pass directly to the single-sided reflector 20, and then the light will travel along the reflectors 22, 24 And into the second end 32 of the lens group 28 . After being focused by the lens group 28 , the light will directly enter the photosensitive device 25 .

In the first optical path 34, the reflected light generated by the document 16 is transmitted from the transparent platform 14 to the first end 30 of the lens group 28. The distance transmitted to the photosensitive device 25 is the image distance of the lens group 28 . In the second optical path 36, the reflected light produced by the document 16 is transmitted from the transparent platform 14 to the second end 32 of the lens group 28. The distance from 30 to the photosensitive device 25 is the image distance of the lens group 28 . Since the ratio of the object distance to the image distance of the first optical path 34 and the second optical path 36 is different, the resolutions of the two are also different. The resolution of the first optical path 34 is higher, but the file size that can be scanned is smaller, while the resolution of the second optical path 36 is smaller, but the file size that can be scanned is larger.

Figure 4 shows that in the third optical path 46, the double-sided reflector 26 will be removed, and the single-sided reflector 20 will be turned to a new angle so that the light from the negative film 19 can pass along the reflector. 22, 24 into the second end 32 of lens group 28. After being focused by the lens group 28 , the light will directly enter the photosensitive device 25 .

Referring to FIG. 5 and FIG. 6 , FIG. 5 is an internal structure diagram of another scanning component 80 of the present invention, which shows the first optical path 70 in the scanning component 80 . FIG. 6 shows another optical path 72 of the scanning assembly 80 of FIG. 5 . The scanning unit 80 includes a housing 81, the upper end of which is provided with an upper scanning hole 76 for scanning the document 16 on the transparent platform 14, and the lower end is provided with a lower scanning hole 78 for scanning the negative film 19 on the negative film platform 17. . The scanning unit 80 also includes an upper side light source 38 for illuminating the document 16 to produce reflected light for scanning, a lower side light source 44 for illuminating the negative 19 to produce transmitted light for scanning, and a first photosensitive device 82. In the casing 81, it is used to scan the light emitted by the document 16 from the upper scanning hole 76, and a second photosensitive device 84 is arranged in the casing 81 to scan the light emitted by the negative film 19 from the lower scanning hole 78. Light, two movable one-way reflectors 96, 98, a lens group 90, which includes a first end 92 and a second end 94, used to focus the light from the document 16 or negative film 19 on the first photosensitive The device 82 or the second photosensitive device 84, and a driving device (not shown), are used to drive the movable single-sided mirrors 96, 98 respectively.

FIG. 5 shows that in the first optical path 70 , the one-way reflector 98 will be moved away, and the reflected light generated by the document 16 will enter the first end 92 of the lens group 90 through the one-way reflector 96 . After being focused by the lens group 90 , the light directly enters the first photosensitive device 82 . FIG. 6 shows that in the second optical path 72 , the one-way reflector 96 is removed, and the reflected light generated by the film 19 is transmitted to the second end 94 of the lens group 90 through the one-way reflector 98 . After being focused by the lens group 90 , the light directly enters the second photosensitive device 84 . Because the required resolution of the negative film 19 is larger than the required resolution of the general document 16, in design, the lens group 90 should be close to the first photosensitive device 82 and away from the second photosensitive device 84, the upper scanning hole 76 and the single-sided The location of the reflecting mirror 96 should also be close to the second photosensitive device 84 . This design allows the image-to-object distance ratio in the first optical path 70 to be smaller than that in the second optical path 72, thus allowing the second optical path 72 to produce greater resolution.

The design of the variable optical path of the present invention can change the resolution of a scanning assembly with a very simple lens movement mode, and the photosensitive devices and lens groups used in these designs are all existing components, so there is a high cost in manufacturing. Advantages of low cost and simple manufacture.

Claims (7)

1. the scan components with variable light path is made of housing and photosensitive device, set of lenses, a plurality of eyeglass and the light source be located in this housing, it is characterized in that:

Described housing has one first scanning position;

Described photosensitive device is used for scanning the light that a scanned document is transmitted by this first scanning position;

Described a plurality of eyeglass is with the light that this scanned document transmitted this photosensitive device that leads, at least include first eyeglass movably in these a plurality of eyeglasses, be used for changing this scanned document to the light path between this photosensitive device, the light that this scanned document is transmitted reaches this photosensitive device via one first light path or one second light path;

Described set of lenses includes first end and second end, and the light focusing that is used for this scanned document is transmitted is on this photosensitive device;

Described light source is used for shining described file;

Wherein, on described first light path, the light that this scanned document transmitted can be via first end of this set of lenses by this set of lenses and focus on this photosensitive device, and on described second light path, the light that this scanned document transmitted can be via second end of this set of lenses by this set of lenses and focus on this photosensitive device.

2. the scan components with variable light path according to claim 1 is characterized in that: described light source is used for producing light in order to shine described scanned document file.

3. the scan components with variable light path according to claim 1 is characterized in that: have a drive unit that is used for driving described first eyeglass.

4. the scan components with variable light path according to claim 1 is characterized in that: described first light path does not wait via this set of lenses to the distance between this photosensitive device via this set of lenses to distance between this photosensitive device and described second light path.

5. the scan components with variable light path according to claim 1, it is characterized in that: described first eyeglass is a two-sided speculum, be arranged at asking of this set of lenses and this photosensitive device, in described first light path, the front mirror of this double mirror can reflex to the light that this document transmitted first end of this set of lenses, then the negative speculum of this double mirror can will see through this set of lenses and reflex to this photosensitive device via the light that other eyeglasses are passed back, in described second light path, this double mirror can be moved and make light that this document transmits reach second end of this set of lenses via other eyeglasses, then sees through this set of lenses again and reaches this photosensitive device.

6. the scan components with variable light path according to claim 5, it is characterized in that: described housing includes one second scanning position in addition, and described second light path include second eyeglass movably in a plurality of eyeglasses of process in addition, this second eyeglass and described first eyeglass can be driven by a drive unit, and this second eyeglass can be moved to the another location so that the light that second file transmitted that is positioned at this second scanning position can reach described photosensitive device via other eyeglasses of this second eyeglass that is moved and described second light path.

7. the scan components with variable light path is made of housing and photosensitive device, set of lenses, eyeglass and the light source be located in this housing, it is characterized in that:

Described housing has one first scanning position and one second scanning position;

Described photosensitive device is made up of one first photosensitive device and one second photosensitive device, wherein, this first photosensitive device scans the light that one first file is transmitted by this first scanning position, and this second photosensitive device scans the light that one second file is transmitted by this second scanning position;

Described set of lenses is located between this first and second photosensitive device, and it has first end and second end;

Described eyeglass by one movably first eyeglass and movably second eyeglass form, this lead first end of this set of lenses of first eyeglass light that this first file is transmitted movably wherein, and focus on this first photosensitive device via this set of lenses; This is lead second end of this set of lenses of second eyeglass light that this second file is transmitted movably, and focuses on this second photosensitive device via this set of lenses;

Described light source is used for producing light to shine described file;

Wherein, when the light that is transmitted when described first file is led first end of this set of lenses by this first eyeglass, this second eyeglass can be removed so that the light that this first file transmitted can focus on this first photosensitive device via this set of lenses, and the light that is transmitted when described second file is when being led second end of this set of lenses by this second eyeglass, and this first eyeglass can be removed so that the light that this second file transmitted can focus on this second photosensitive device via this set of lenses.

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