CN2377623Y

CN2377623Y - Optial-mechanical module capable of decreasing size of scanner

Info

Publication number: CN2377623Y
Application number: CN 99210706
Authority: CN
Inventors: 蔡振财
Original assignee: Mustek Systems Inc
Current assignee: Hongyou Science & Technology Co Ltd
Priority date: 1999-05-11
Filing date: 1999-05-11
Publication date: 2000-05-10
Anticipated expiration: 2009-05-11

Abstract

The utility model relates to an optical-mechanical module of an image scanner. The utility model is mainly formed by the method that a lamp device is composed of a main body part and extended flexure parts on both ends of the main body part, the plane formed by the main body part and the flexure parts of the lamp device is perpendicular to a location plane which is scanned, and thereby, a lamp which has shorter length can be used to reduce the volume of the scanner.

Description

Can dwindle the ray machine module of scanner volume

The utility model relates to a kind of ray machine module of image scanner.

At present, known device of image scanning has a lamp tube device 14, in order between scanning pattern (direction as shown by arrow A) and scanned 10 (for example: paper lattice, picture etc.), to relatively move, so that with above-mentioned scanned 10 image, for example:, and (for example: charge-coupled device (CCD) CCD etc.) be projected to video receiver 12 via a focal imaging device 16.

Above-mentioned lamp tube device 14 can be cold-cathode tube, and it has fluorescent tube 142 always, and the power supply connector 144 that is installed in above-mentioned straight fluorescent tube 142 two ends.And above-mentioned lamp tube device 14 is to be installed on the above-mentioned scanning pattern, in order to emission light to above-mentioned scanned 10, as the light source that makes above-mentioned scanned 10 reflections (as shown by arrow B).

Above-mentioned focal imaging device 16 can be made of lens, in order to above-mentioned scanned 10 light that reflected back are given focal imaging at above-mentioned video receiver 12 (as shown by arrow C).

Generally speaking, the light intensity that uses the straight fluorescent tube of " one " font to be sent is also inhomogeneous, usually the briliancy of lamp tube ends than center section a little less than, make that scanned reflection ray intensity in lamp tube ends is faint than center section, cause electric coupling device to receive the error of light intensity, reduced the correctness that signal reads, thereby the quality of influence scanning, as shown in Figure 2, length is L's " one " font fluorescent tube 30, at its two end portions L2, L3, its brightness value descends apace, the zone that only has middle L1 brightness value partly to can be applicable to scan.

In order to address the above problem, located by prior art mostly is the length of the straight fluorescent tube of lengthening, and abandon the more weak part of lamp tube ends light need not, only use intermediate rays comparatively uniformly part shine scanned; Yet this mode but can cause scanner volume to become big, and for example: the length L of general straight fluorescent tube is 262mm, but live part L1 is 226mm only but, supposes that desired maximum sweep width is 226mm, but must use the fluorescent tube of 262mm, therefore can't effectively reduce the volume of scanner.

In addition, for the problem of the briliancy deficiency that solves straight lamp tube ends, shown in Fig. 3-6, various fluorescent tubes mainly are to form bent part at the two ends of straight fluorescent tube, utilize the brightness of formed bent part reinforcement both sides, also dwindle the volume of scanner.

As shown in Figure 7, wherein have two ends and be the fluorescent tube 30 of L type, scanned 32, charge-coupled device (CCD) (a kind of lamp tube device) 34, focal imaging device 36, also mark catoptrical path D, the width LS of sweep trace, because the plane parallel of fluorescent tube 30 disposes in scanned 32, so, block the path D of light reflection for fear of lamp tube ends L bent part, so the length of fluorescent tube 30 still needs the width LS greater than sweep trace, especially when fluorescent tube 30 more when scanned, the chance that lamp tube ends L bent part is blocked the path D of light reflection then heals big, because the length of fluorescent tube can't be as much as possible near scanning line width, the reduced volume effectively so scanner volume still can be subject to fluorescent tube length.

In view of this, the purpose of this utility model provides a kind of ray machine module that dwindles scanner volume, it mainly is that lamp tube device is disposed in the mode perpendicular to scanned plane, suffers lamp tube body stopping of the two ends bent part of extending partly so as to the path of avoiding light.

The purpose of this utility model is achieved in that a kind of ray machine module that dwindles scanner volume comprises a lamp tube device, a video receiver and scanned, wherein lamp tube device is by a body part and a bent part by this body part two ends extension, and it is characterized in that: the body part of lamp tube device and the plane that bent part is constituted are perpendicular to the plane at scanned place; The body of described lamp tube device is curved shape partly.

Owing to adopt such scheme: can use the less fluorescent tube of length, so that reduce the volume of scanner.

Below in conjunction with drawings and Examples the utility model is further specified.

A kind of embodiment synoptic diagram of Fig. 1 known techniques.

The performance diagram of the straight fluorescent tube size of a kind of embodiment of Fig. 2 known techniques and its briliancy.

The various fluorescent tubes of the straight lamp tube ends luminosity of the known compensation of Fig. 3-6.

The another kind of embodiment synoptic diagram of Fig. 7 known techniques.

Fig. 8 the utility model exemplary embodiments schematic perspective view.

Fig. 9 the utility model exemplary embodiments schematic side view.

Figure 10 the utility model exemplary embodiments schematic top plan view.

A kind of fluorescent tube of Figure 11 the utility model exemplary embodiments be scanned figure thing configuration schematic diagram.

Among the figure: 10,32,50 scanned, 12,52 video receivers, 14 lamp tube devices, 16,36,56 focal imaging devices, 30,34,54,84,142 lamp tube devices, 144 connectors, the arrow in A beacon scanning path, the LS length of scanning line.

Present embodiment, shown in Fig. 8-10, has a lamp tube device 54, in order between scanning pattern (as direction that arrow A is required assistance) and scanned 50 (for example: paper, picture etc.), to relatively move, so that scanned 50 image, for example:, and be projected to video receiver 52 (as: charge-coupled device (CCD)) via a focal imaging device 56 (as: lens combination).

Above-mentioned lamp tube device 54 can be cold-cathode tube, it comprises that a body partly reaches the sweep that is extended by above-mentioned body part two ends, the various lamp tube devices of its possibility shape shown in Fig. 3-6, use U type fluorescent tube as shown in Figure 3 in the present embodiment, above-mentioned lamp tube device 54 is to be installed on the above-mentioned scanning pattern, in order to launch light to above-mentioned scanned 50, as the light source that makes above-mentioned scanned 50 reflections (as shown by arrow B), above-mentioned focal imaging device 56 is in order to give focal imaging at above-mentioned video receiver 52 (as shown by arrow C) with above-mentioned scanned 50 light that reflected back.

The plane system that the body part of above-mentioned lamp tube device 54 and the extension at two ends thereof are partly constituted is perpendicular to the plane at above-mentioned scanned 50 places, as shown in Figure 9, scanned catoptrical path B promptly can not taken place by the situation that U type lamp tube ends bent part shelters from.Therefore, promptly the length that need not painstakingly make fluorescent tube is greater than sweep trace, and the length of fluorescent tube is reduced, so the volume of scanner also can relatively reduce.

Since fluorescent tube system vertically with scanned configuration, so the extension of lamp tube ends partly promptly can't be carried out the compensation of luminosity to the sweep trace two ends, in order to remedy this shortcoming, lamp tube device among Figure 10 54 can be changed into the lamp tube device 84 among Figure 11, change the linear portions body of original lamp pipe into arc-shaped bend, so, the central part of lamp tube body and be scanned figure between distance greater than lamp tube ends and scanned 's distance, because the brightness and the square distance of light are inversely proportional to, so use when having the fluorescent tube 84 of arc body, the brightness meeting of scanned central part is less than the fluorescent tube 54 that uses original linear body, so the brightness meeting partly of sweep trace central part and its two ends is more even.

In like manner, when other lamp tube devices of using shown in Fig. 3-6, also can be as mentioned above partly change the body of fluorescent tube into arc-shaped bend, can be even so that be scanned the brightness of line.

From the above, being characterized as of ray machine module of the present utility model: the lamp tube device that will have U type bent part is vertical the putting of 90 degree with the plane of scanning motion, so as to making fluorescent tube can not block opticpath, and fluorescent tube is shortened as best one can, and then, the volume of reduction scanner, in addition, in order to make the luminance brightness on the sweep trace can be average, also can partly change the straight line body of fluorescent tube into arc, and obtain uniform brightness.

Claims

1, a kind of ray machine module that dwindles scanner volume comprises a lamp tube device, a video receiver and scanned, wherein lamp tube device is by a body part and a bent part by this body part two ends extension, and it is characterized in that: the body part of lamp tube device and the plane that bent part is constituted are perpendicular to the plane at scanned place.

2, by the described ray machine module that dwindles scanner volume of claim 1, it is characterized in that: the body of described lamp tube device is curved shape partly.