CN1218195A - Reflective/transmissive light source device - Google Patents

Abstract

A reflection-type/transmission-type light source device for image scanner with a transparent scan window is composed of a light source arranged at one side of said transparent scan window for providing an initial optical signal, which can be projected to one side of said transparent scan window for reflection to obtain a reflection-type optical signal, and a reflector set arranged on the optical path of said initial optical signal for changing the optical path to make the initial optical signal projected from another side of said transparent scan window to said transparent scan window and pass through said transparent scan window to obtain a transmission-type optical signal.

Description

Reflective/transmissive light source unit

The invention relates to a light source device, in particular to a reflective/transmissive light source device for an image scanning device that can simultaneously provide a reflective light source and a transmissive light source.

First, referring to FIG. 1 , it is a side sectional view of a conventional image scanning device with reflective and transmissive scanning functions. As shown in the figure, a reflective light source 111 includes a reflecting mirror 112, a lens group 113 and a The image pickup unit of the CCD 114 is disposed in a carrying case 115 , the carrying case 115 is located inside the lower case 11 , and a driving unit 116 drives the carrying case 115 . A transmissive light source 121 is disposed inside the upper housing 12 , and a driving unit 122 drives the transmissive light source 121 . The lower casing 11 has a scanning window 117 for placing a transparent scanned object or a non-transparent scanned object 118 .

It can be seen from FIG. 1 that the conventional image scanning device with reflective and transmissive dual-purpose functions combines the light source used for scanning reflective manuscripts and the drive circuit associated with the light source, and the light source used for scanning transmissive manuscripts and their related components. The driving circuit related to the light source is separated, which causes the following disadvantages:

1. Because there are two light sources and driving circuits related to the light sources at the same time, the production cost is increased;

2. In order to arrange the above-mentioned device inside an image scanner, the volume of the whole scanner is increased;

3. In order to control the relevant driving circuits of the two groups of light sources, the complexity of the circuit is increased, resulting in an increase in maintenance rate;

4. If the two light sources are turned on at the same time, it will consume more power. If the two light sources are switched on, additional warm-up time will be required, which is more time-consuming.

An object of the present invention is to provide a reflective/transmissive light source device that can provide reflective light source and transmissive light source at the same time.

Another object of the present invention is to provide a reflective/transmissive light source device with small volume and low cost.

To achieve the above object, the present invention provides a reflective/transmissive light source device, which is used in an image scanning device with a transparent scanning window. The light source device includes: a light source, arranged on one side of the transparent scanning window, for To provide an initial optical signal, the initial optical signal can be projected to one side of the transparent scanning window and reflected to obtain a reflective optical signal; The optical path is changed so that the initial optical signal is projected onto the transparent scanning window from the other side of the transparent scanning window, and passes through the transparent scanning window to obtain a transmissive optical signal.

The above-mentioned image scanning device is preferably a reflective/transmissive image scanning device.

The image scanning device also includes an image pickup unit, the image pickup unit includes: a charge-coupled element, used to receive a scanning optical signal generated by projecting the initial optical signal to a scanned object, thereby generating an electronic signal; a mirror, used to make the scanning optical signal perpendicular to the charge-coupled device; a lens group, arranged between the mirror and the charge-coupled device, so as to converge the scanning optical signal onto the charge-coupled device; and a processing unit for processing the electronic signal output by the charge-coupled device to obtain an image of the scanned object.

The above-mentioned image pickup unit can be connected to the light source and driven by a driving unit so that the light source and the image pickup unit move synchronously.

The above-mentioned light source is a physical light source, and the physical light source can be a cold cathode tube or a fluorescent tube.

The above-mentioned light source is located below the transparent scanning window to provide the initial optical signal and project the initial optical signal to the lower surface of the transparent scanning window.

The above-mentioned transparent scanning window can be used to place a non-transparent scanned object, and the non-transparent scanned object faces the transparent scanning window, so that the initial optical signal is projected to the non-transparent scanned object and reflected to obtain a reflective scanning optical signal.

The above-mentioned reflective mirror group may include: a first reflective mirror, arranged under the transparent scanning window and on the same side as the light source, for receiving the initial optical signal provided by the light source, and making the initial optical signal vertically radiate towards the transparent scanning window; a second reflector, arranged above the transparent scanning window, and on the same vertical line as the first reflective mirror, so that the initial optical signal passing through the transparent scanning window can be parallel to The transparent scanning window advances; and a third reflective mirror is arranged above the transparent scanning window and is positioned on the same horizontal line as the second reflective mirror, so that the initial optical signal is directed to an upper surface of the transparent scanning window .

The above-mentioned transparent scanning window can be used to place a transparent object to be scanned, so that the initial optical signal is projected onto the transparent object to be scanned, and transmitted to obtain a transmissive scanning optical signal.

The above-mentioned first reflector can be disposed inside a lower casing included in the image scanning device, and the light source is located inside the lower casing.

The above-mentioned second reflector can be located inside an upper casing of the image scanning device, and the third reflector can be located inside the upper casing.

The above-mentioned lower casing has the transparent scanning window, and the transparent scanning window can be divided into a scanning area and a light source penetrating area, wherein the scanning area is used to place a scanned object, and the light source penetrating area is used for passing through The initial optical signal reflected by the first mirror passes through.

The above-mentioned upper casing may have a first light-transmitting area and a second light-transmitting area respectively corresponding to the scanning area and the light source penetration area, and the first light-transmitting area and the second light-transmitting area are used for for the initial optical signal to pass through.

The first mirror and the second mirror are fixed inside the image scanning device.

The third reflective mirror is driven by a drive unit to make the third reflective mirror move synchronously with the light source.

The reflective/transmissive light source device provided by the present invention only uses one physical light source, but can provide reflective and transmissive light sources at the same time, and has the following advantages: only one light source and a group of light source related circuits need to be set in the image scanning device, It can reduce production costs; the overall structure is quite simple, and the volume of the image scanning device can be greatly reduced; no additional circuits are needed, the complexity is low, and the maintenance rate can be greatly reduced; there is no problem of simultaneous lighting or switching of two sets of light sources, so no It will consume extra power and will not consume extra time; there are no disadvantages such as black lines, different-color line outlines, and color distortion.

Embodiments of the present invention are described in detail below with reference to the accompanying drawings, wherein:

FIG. 1 is a side cross-sectional view of a conventional image scanning device with reflective and transmissive scanning functions;

FIG. 2 is a partial structural perspective view of a reflective/transmissive light source device of the present invention applied to an image scanning device;

3 is a side cross-sectional view of the structure of the reflective/transmissive light source device of the present invention applied to an image scanning device.

First, referring to the structural perspective view shown in FIG. 2 , which includes the light source device of the present invention, which can be used to provide a transmissive light source, the figure includes a lower casing 21 and an upper casing 22 of an image scanning device , wherein the lower housing 21 is provided with a scanning area 216 for placing the object to be scanned, and a light source penetration area 217 for an optical signal to pass through, and the upper housing 22 has the scanning area 216 and the light source penetration area respectively 217 corresponds to a first transparent region 221 and a second transparent region 222 .

The interior of the lower housing 21 includes: a physical light source 211; a first mirror M1, which is arranged on an optical path of an initial optical signal L1 provided by the physical light source 211, and the first mirror M1 is used to receive the initial optical signal L1. Signal L1, so that the initial optical signal L1 is perpendicular to the light source transmission area 217, and the initial optical signal L1 that passes through the light source transmission area 217 is projected to the second light transmission area 222, and penetrates the second light transmission area 222. Two light-transmitting regions 222 are projected onto the second mirror M2 located in the upper housing 22, and the second mirror M2 is located on the same vertical line as the first mirror M1, and the second mirror M2 In order to make the initial optical signal L1 projected thereon advance parallel to the scanning area 216 and project to the third reflective mirror M3, wherein the third reflective mirror M3 is arranged to be located at the same position as the second reflective mirror M2 On the same horizontal line, it is used to change the optical path of the initial optical signal L1, so that the initial optical signal L1 is projected to the first light-transmitting area 221, and penetrates the first light-transmitting area 221 to provide a transmissive light source, It is then projected to the scanning area 216 , penetrates the scanning area 216 to reach a mirror 212 , and is reflected by the mirror 212 for processing of other components.

Wherein the third reflective mirror M3 is driven by a driving unit, and the entity light source 211 and the reflector 212 are also driven by a drive unit, so that the third reflector M3 can be synchronized with the entity light source 211 and the reflector 212 moving, so that the third reflector M3 maintains a corresponding fixed position with the physical light source 211 and the reflector 212 .

Referring to Fig. 3 below, it is a side sectional view of the structure of the reflective/transmissive light source device of the present invention applied to an image scanning device, which includes a lower casing 21 and an upper casing 22 of an image scanning device; the lower casing 21 has a solid light source 211 inside, and an image pickup unit that includes a mirror 212, a lens group 213, and a charge-coupled device 214; and the solid light source 211, the mirror 212, the lens group 213 and the charge The coupling element 214 is arranged in a carrying case 215; a first reflector M1 included in a reflector group is arranged in the lower housing 21, a second reflector M2 and a first reflector included in the reflector group The three mirrors M3 are disposed in the upper casing 22 .

The lower casing 21 is provided with a scanning area 216 for the user to place an object 23 to be scanned, and the lower casing 21 is also provided with a light source penetration area 217 for the light reflected by the first mirror M1 The initial optical signal L1 passes through. The upper housing 22 is provided with a first light-transmitting area 221 and a second light-transmitting area 222 respectively corresponding to the scanning area 216 and the light source penetration area 217, and the bearing housing 215 has a first opening The groove 2151 and a second opening groove 2152 .

Relying on the above structure, when the user wants to scan a non-transparent scanned object 23, he only needs to place the non-transparent scanned object 23 in the scanning area 216 and face the non-transparent scanned object 23 to the scanning area 216 , then at this time a driving unit drives the carrying case 215 to make the components in the carrying case 215 start to move, then an initial optical signal L2 provided by the physical light source 211 passes through the first optical signal L2 on the carrying case 215 A slot 2151 is opened, so that the initial optical signal L2 is directly projected to the non-transparent scanned object 23 and reflected to obtain a reflective scanning optical signal L3.

Then the reflective scanning optical signal L3 is vertically irradiated to the charge-coupled device 214 through the reflection of the mirror 212, and through the lens group 213 arranged between the mirror 212 and the charge-coupled device 214, the reflected The scanning optical signal L3 is converged to the charge-coupled element 214, and the charge-coupled element 214 generates an electronic signal after receiving the reflective scanning optical signal L3, and sends the electronic signal to a processing unit for a processing action to obtain a Image of the scanned object.

When the user wants to scan a transparent object to be scanned 23, he only needs to place the transparent object to be scanned 23 on the scanning area 216, and then a drive unit drives the carrying case 215 to make the carrying case The components in 215 start to operate, and an initial optical signal L1 provided by the physical light source 211 is sent to the first reflector M1 through the second opening groove 2152 on the carrying case 215, and is reflected by the first reflector M1 The initial optical signal L1 is perpendicular to the light source penetrating area 217, and penetrates the light source penetrating area 217 and the second light penetrating area 222, and then the initial optical signal L1 is parallel to the scanning area 216 by the second mirror M2. Advance, and then by the third mirror M3, the initial optical signal L1 is directed to the first light transmission area 221, and penetrates the first light transmission area 221 and is projected to the transparent object 23 to be scanned, then by penetrating the transparent The initial optical signal L1 of the scanned object 23 obtains a transmissive scanning optical signal L3. At this time, the transmissive scanning optical signal L3 will penetrate the scanning area 216 to reach the reflector 212, and pass through the lens group 213. It reaches the charge-coupled device 214 to generate an electronic signal output, and a processing unit also performs a processing operation to obtain an image of the scanned object.

Of course, the lower casing of the image scanning device of the present invention may have a transparent scanning window, and is not limited to a hardware structure for separating a scanning area and a light source penetration area. It is only necessary to mark different areas on the transparent scanning window for easy use. Or place the object to be scanned; and the first light-transmitting area and the second light-transmitting area of the upper casing are not limited to being divided into two light-transmitting areas by a hardware structure, and only need to be covered by a complete light-transmitting area The transparent scanning window can also achieve the purpose of image scanning and providing reflective/transmissive light sources.

Of course, the light source penetrating area and the corresponding second light-transmitting area and the first light-transmitting area can use light-transmitting materials such as glass, and of course long slots can also be provided in the lower casing and the upper casing respectively. The purpose of optical signal penetration can be achieved.

To sum up, the reflective/transmissive light source device provided by the present invention only uses one physical light source, and can simultaneously provide reflective and transmissive light source signals, and is low in cost and easy to manufacture.

Claims (16)

1. reflective/transmissible optical source device is used for having the device of image scanning of a transparent scanning form, comprising:

One light source is arranged at described transparent scanning form one side, and in order to an initial optical signal to be provided, described initial optical signal is projected to described transparent scanning form one side and reflects, to obtain a reflective optic signal; And

One reflective mirror group, be arranged on the optical path of described initial optical signal, in order to change described optical path, and described initial optical signal is projected on the described transparent scanning form from the opposite side of described transparent scanning form, and pass described transparent scanning form and obtain a transmission-type optical signalling.

2. as claimed in claim 1 reflective/the transmissible optical source device, it is characterized in that described device of image scanning is a reflective/transmission-type device of image scanning.

3. as claimed in claim 1 reflective/the transmissible optical source device, it is characterized in that described device of image scanning also comprises an image pickup unit, described image pickup unit comprises:

One charge coupled cell projects a scanned one scan optical signalling that produces in order to receive described initial optical signal, to produce an electronic signal;

One catoptron is used so that the described charge coupled cell of the vertical directive of described scanning optical signal;

One lens combination is arranged between described catoptron and the described charge coupled cell, with described scanning optical signal gathering to described charge coupled cell; And

One processing unit is in order to handle the described electronic signal of described charge coupled cell output, to obtain a scanned image.

4. as claimed in claim 3 reflective/the transmissible optical source device, it is characterized in that described image pickup unit is linked to described light source, by a drive unit drives, described light source and described image pickup units synchronization are moved.

5. as claimed in claim 1 reflective/the transmissible optical source device, it is characterized in that described light source is an entity light source, it is a cold-cathode tube.

6. as claimed in claim 1 reflective/the transmissible optical source device, it is characterized in that described light source is an entity light source, it is a fluorescent tube.

7. as claimed in claim 1 reflective/the transmissible optical source device, it is characterized in that, described light source is positioned at described transparent scanning form below, so that described initial optical signal to be provided, and makes described initial optical signal invest a lower surface of described transparent scanning form.

8. as claimed in claim 7 reflective/the transmissible optical source device, it is characterized in that, described transparent scanning form is nontransparent scanned in order to put one, and it is described nontransparent scanned towards described transparent scanning form, it is described nontransparent scanned that described initial optical signal is projected to, and reflection, to obtain a reflective scanning mode optical signalling.

9. as claimed in claim 1 reflective/the transmissible optical source device, it is characterized in that described reflective mirror group comprises:

One first reflective mirror is arranged at described transparent scanning form below, and is positioned at the same side with described light source, in order to receiving the described initial optical signal that described light source provides, and makes the described transparent scanning form of the vertical directive of described initial optical signal;

One second reflective mirror is arranged at described transparent scanning form top, and is positioned on the same perpendicular line with described first reflective mirror, with so that penetrate the described initial optical signal of described transparent scanning form and can be parallel to described transparent scanning form and advance; And

One the 3rd reflective mirror is arranged at described transparent scanning form top, and is positioned on the same horizontal line with described second reflective mirror, uses so that a upper surface of the described transparent scanning form of described initial optical signal directive.

10. as claimed in claim 9 reflective/the transmissible optical source device, it is characterized in that described transparent scanning form is one transparent scanned in order to put, it is described transparent scanned that described initial optical signal is projected to, and transmission, to obtain a transmission-type scanning optical signalling.

11. as claimed in claim 9 reflective/the transmissible optical source device, it is characterized in that described first reflective mirror is arranged at the included enclosure interior once of described device of image scanning, and described light source is positioned at described lower house inside.

12. as claimed in claim 11 reflective/the transmissible optical source device, it is characterized in that described second reflective mirror is positioned at the included upper shell inside of described device of image scanning, and described the 3rd reflective mirror is positioned at described upper shell inside.

13. as claimed in claim 12 reflective/the transmissible optical source device, it is characterized in that, described lower house has described transparent scanning form, and described transparent scanning form can be divided into an one scan district and a light source penetrating region, wherein said scanning area is one scanned in order to put, and described light source penetrating region is used for the described initial optical signal via described first reflective mirror reflection and passed through.

14. as claimed in claim 13 reflective/the transmissible optical source device, it is characterized in that, described upper shell has respectively and described scanning area and corresponding one first photic zone of described light source penetrating region and one second photic zone, and described first photic zone and described second photic zone are used for described initial optical signal and passed through.

15. as claimed in claim 9 reflective/the transmissible optical source device, it is characterized in that described first reflective mirror and described second reflective mirror are fixedly arranged on described device of image scanning inside.

16. as claimed in claim 9 reflective/the transmissible optical source device, it is characterized in that described the 3rd reflective mirror is by a drive unit drives, and make described the 3rd reflective mirror and the same moved further of described light source.

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