Single lamp-tube scanning apparatus
The present invention relates to a kind of single lamp-tube scanning apparatus, particularly relate to a kind of multiple chip scanister of single fluorescent tube that is installed in the host computer housing.
Along with the progress of science and technology, product miscellaneous also makes rapid progress, and also is so for optical systems such as scanner, and in technology evolution, also more and more diversified for the requirement of scanner.Except higher and accurate resolution, can be installed in as the computer standard fitting also becomes a major requirement in the host computer housing.
Often utilize roller to send among the scanner scanned in the prior art, because accompanying dust powder on the roller, easily scratch is scanned, and can appear at the abnormal case that produces heterochromatic line or black line on the image output.In addition, the situation of holding paper often takes place in the roller type transmission frame, causes greatly inconvenience of user; And the roller type transmission frame also can't be applied among the transparent mode file such as transparency, and therefore there are many shortcomings in existing roller type transmission frame.
The comparatively advanced and widely used mode of another kind, be to be seated in a pallet top or the box body with scanned, send in the scanner again and scan, so just need not contact scanned surface, the scanned situation of scratch can not take place, also need not take the dust on the normal cleaning roller, thereby improve user's operation ease as the roller type transmitting device.
Yet the formula scanner is installed in existing inside, how can only scanning reflection formula file, and such as the file that light tight materials such as paper, photograph, business card are formed, reason is the many homonymies at scanned scanning plane in fluorescent tube present position.But for the transparent mode file, file such as transparency or lantern slide for example, not directly to scan, the servicing unit of necessary external scanning transparent mode file, need another fluorescent tube to be used for scanning the transparent mode file specially exactly, not only cause cost waste, extra servicing unit also need occupy additional space.
Because general scanister inner space is limited, so physical construction and optical element can't effectively dwindle, promptly has a strong impact on the scan area that the formula scanner is installed in inside.In addition, can't originate as the light beam of scanning because of brightness is low in the two ends of fluorescent tube, be example with Fig. 4, and label 401 is pointed out the length overall of fluorescent tube, the effective length of illumination of label 402 representatives, and it is with the central luminosity (B among Fig. 4
1) the 50% (B of Fig. 4
0.5) be the boundary; Label 403 expression fluorescent tube luminosity are B
1The 90% (B among Fig. 4
0.9) above part; 404 of labels are the invalid part of lamp luminescence, and it is about 20 millimeters long.As shown in Figure 4, scan available fluorescent tube length and have only the pointed length of label 403, so effective scanning area generally has only 4 inches * 6 inches size.Therefore a kind ofly can scan transparent mode and reflective file, and have the scanister of the area that exposes thoroughly, its coml necessity is just arranged.
The purpose of this invention is to provide a kind of single lamp-tube scanning apparatus, making it can scanning reflection formula file, can scan the transparent mode file again, and its cost increases little and can increase its effective sweep width simultaneously.
The object of the present invention is achieved like this, promptly adopt a kind of being fixed in the host computer housing, can adjust light source position according to scanned material, to scan this scanned single lamp-tube scanning apparatus, it comprises at least: a feed arrangement, and this is scanned to be used for input; One filming image device, it has a switchable light source, when the scanning thing of scanning reflection material, its light source is switched to the position of the face that is scanned of described scanning thing, when the scanning thing of scanning transmission material, its light source is switched to the position of the another side of described scanning thing, to produce this scanned signal of video signal; An and gearing, it is scanned to import this to be used to drive this feed arrangement, and be used to control the pass through operational movement of this filming image device of this scanning thing, this operational movement of passing through the filming image device continue to carry out up to this scanned all finished by the scanning of filming image device till.
Filming image device in the above-mentioned scanister comprises at least: single lamp-tube scanning apparatus as claimed in claim 1, and wherein said filming image device comprises at least: a light source, it can be switched to produce light beam and be projected to that this is scanned; One reflection unit is used to reflect this and is projected to scanned light beam; One imaging device is used to import this folded light beam to produce an imaging signal; And an image-taking device, be used to import this imaging signal to reappear this image.Described light source comprises a fluorescent tube at least, and this fluorescent tube is to be positioned at this inside to install formula long tube scanner body, is exposed at the part of this host computer housing outside.
The advantage of scanister of the present invention is, because it is at reflective and transparent mode file, the position of switching single fluorescent tube is scanned, fluorescent tube also can move on to the outside of host computer housing by actual needs, cooperate the lengthening fluorescent tube simultaneously, and except fluorescent tube, other element of scanister need not move all, thereby reduced the cost price of this scanister, and increased effective sweep width.
The present invention is described in further detail below in conjunction with the accompanying drawing illustrated embodiment, in the accompanying drawing:
Figure 1A is the vertical view cutaway drawing of first preferred embodiment of single lamp-tube scanning apparatus;
Figure 1B is the side sectional view of scanister shown in Figure 1A;
Fig. 2 A is the vertical view cutaway drawing of second preferred embodiment of single lamp-tube scanning apparatus;
Fig. 2 B is the side sectional view of scanister shown in Fig. 2 A;
Fig. 3 A is illustrated in first kind of switching mode of fluorescent tube in second preferred embodiment;
Fig. 3 B is illustrated in second kind of switching mode of fluorescent tube in second preferred embodiment;
Fig. 4 represents the relation between fluorescent tube luminous intensity and the scanning effective length.
Figure 1A and Figure 1B are respectively the overlooking and side sectional view of first preferred embodiment of single lamp-tube scanning apparatus, they express the organism internal structure of this single lamp-tube scanning apparatus, mark host computer housing 101, single lamp-tube scanning apparatus 102, fluorescent tube 103, catoptron 105, lens 106, charge-coupled image sensor 107 and pallet 108 among the figure.The visual scanned material in the position of fluorescent tube 103 and changing when for example fluorescent tube is positioned at the position of label 104, can be used for scanning the transparent mode file, and can scanning reflection formula file when the position of label 103.It should be noted that except fluorescent tube, other elements of scanister all need not move.
When fluorescent tube is positioned at position shown in the label 103, represent that scanned 108 are reflective file, the light path of scanning will be via fluorescent tube 103, scanned 108, catoptron 105, lens 106 to charge-coupled image sensor 107; When scanned 108 were the transparent mode file, light path will be via fluorescent tube 104, scanned 108, catoptron 105, lens 106 to charge-coupled image sensor 107.
Learn by first preferred embodiment, some protrudes in single lamp-tube scanning apparatus 102 outside the host computer housing 101, and outstanding part comprises fluorescent tube 103 and catoptron 105, because this outshot is wideer than the width of host computer housing 101, so the length of fluorescent tube 103 can extend, the length of catoptron 104, also elongated along with the lengthening of fluorescent tube 103, but the length of answering attention reflex mirror 104 to be increased must be consistent with the effective scanning length of fluorescent tube 103.
Fig. 2 A and Fig. 2 B are respectively the overlooking and side sectional view of second preferred embodiment of single lamp-tube scanning apparatus, they represent the organism internal structure of this single lamp-tube scanning apparatus, mark host computer housing 201, single lamp-tube scanning apparatus 202, fluorescent tube 203, catoptron 205, lens 206, charge-coupled image sensor 207 and pallet 208 among the figure.
Similar to first preferred embodiment is, when fluorescent tube is positioned at position shown in the label 203, represents that scanned 208 are reflective file, and the light path of scanning will be via fluorescent tube 203, scanned 208, catoptron 205, lens 206 to charge-coupled image sensor 207; When scanned 208 were the transparent mode file, light path will be via fluorescent tube 204, scanned 208, catoptron 205, lens 206 to charge-coupled image sensor 207.It should be noted that no matter scanned material why, the light path of scanning is all identical, and except fluorescent tube, other elements of scanister all need not move.
As for the switching mode of fluorescent tube, visual practical situations utilize the mode of the translation fluorescent tube shown in Fig. 3 A, or the mode of the mobile fluorescent tube of rotation shown in Fig. 3 B is finished.In addition, the switching mechanism of fluorescent tube can utilize mechanical arm, be connected two of fluorescent tube and bring in and finish change action, and the switching controls of fluorescent tube can be utilized soft-body equally, or set up all to change button outside body and finish.
Compare with first preferred embodiment, whole bodies of the single lamp-tube scanning apparatus 102 of second preferred embodiment, all be positioned within the host computer housing 101, but the same visual scanned material in the position of fluorescent tube 203 and changing, for example when fluorescent tube is positioned at the position of label 204, can be used for scanning the transparent mode file, and can scanning reflection formula file when the position of label 203.Yet because of fluorescent tube 203 is positioned among the host computer body, so the length of fluorescent tube 203 is short than fluorescent tube 103, so effective scanning length is also little than first preferred embodiment.
In above-mentioned two preferred embodiments, neither using done further restriction to gear train, existing gear set or tooth bar cooperate the kind of drive of transmission shaft, cable wire and motor even screw rod to add that the kind of drive such as motor all can be applicable in the long tube scanner.
The invention described above preferred embodiment can not be used for limiting the scope of protection of present invention; All do not exceed the change of claims limited range of the present invention, and change or other equivalent measure all are considered as the claimed content of the present invention.