CN1091907C - Scanning device with high analytic degree - Google Patents

Abstract

The present invention relates to a scanning device with high analytic degree, which comprises a lens, a charge coupled element CCD, deviation glass, a permanent magnet, an electromagnet, a counter weight and a scanning object. A refraction principle of glass to a light beam lambada is used, which enables a light path of the scanning object to horizontally move for half an image point. Thus image information between points of an original image can be obtained.

Description

Scanister with high-res

The present invention relates to a kind of scanister, refer to a kind of device of image scanning that obtains being higher than CCD sensor resolution especially with high-res.

The image analytic degree multiplication method that is used for charge coupled cell (CCD) sensor at present carries out with software approach mostly, no matter is method of difference or approximation to function method, and resolution effectively all can't double.

Between each adjacent sensing cell of normal CCD a bit of crested position is arranged, so when actual scanning, falling within each sensing cell of CCD image information between points can't be read, thereby has influence on image quality, although utilize the software mode correction, also can't recover fully.

The object of the present invention is to provide a kind of scanister with high-res, its CCD sensor (as 300dpi) by low-res is auxiliary with other mechanism, makes scanner can obtain higher resolution (as 600dpi, 900dpi).

The object of the present invention is achieved like this, and a kind of scanister with high-res promptly is provided, and it comprises: a shell; The light source of one scan object; One capture mechanism; One deflection of light member is set between scanned object and the capture mechanism; Utilize the light refraction principle, make a bit of distance of light path translation of scanned object, obtain the image information between points of former image by this.

The invention has the advantages that, utilize glass, make half imaging point of light path translation of scanned object, obtain the point of former image and the image information between point by this ray refraction principle.

Below in conjunction with accompanying drawing, embodiments of the invention are described, wherein:

Fig. 1 makes incident light be offset the synoptic diagram of half imaging point distance;

Fig. 2 is a synoptic diagram of the present invention;

Fig. 3 makes incident light be offset the side view of an angle via glass;

Fig. 4 is the synoptic diagram of another embodiment of the present invention.

See also the scanister that the present invention shown in Fig. 1,2 has high-res, it utilizes the refraction principle of glass to light λ, make half (0.5) imaging point of light path translation of scanned object, obtain the point of former image and the image information between point by this, this scanister comprises capture mechanism 1, deviation glass 2, permanent magnet 3, electromagnet 4, moving fulcrum 5, counter-balanced heavy hammer 6, face glass 7 and the scanned object 8 with lens group 11 and CCD12; Wherein: deviation glass 2 is located between capture mechanism 1 and the scanned object 8, this scanned object 8 is positioned on the face glass 7, the right-hand member of deviation glass 2 connects permanent magnet 3, and on the permanent magnet 3 corresponding positions electromagnet 4 is set, and this electromagnet 4 has upper end 41 and bottom 42; The left end of this deviation glass 2 is engaged on the moving fulcrum 5, these moving fulcrum 5 lefts connect counter-balanced heavy hammer 6, this counter-balanced heavy hammer 6 of mat makes electromagnet 4 can come mobile deviation glass 2 with less energy with 2 pairs of moving fulcrums of balance deviation glass, 5 formed clockwise moments.

When electromagnet 4 is subjected to forward when energising, its bottom 42 attracts permanent magnets 3, and permanent magnets 3 are repelled in upper end 41, and at this moment, the right-hand member of deviation glass 2 can reduce apart from the distance of horizontal line 5mm, and makes the turn left distance of skew 0.02mm of incident light.

Otherwise if when making electromagnet 4 be subjected to oppositely switching on, its upper end 41 attracts permanent magnets 3, permanent magnet 3 is repelled in bottom 42, and at this moment, deviation glass 2 can up move to 5mm place, horizontal line top, position as shown in phantom in Figure 2, and make the incident light skew 0.02mm that turns right.

The deviation distance of comprehensive incident light as can be known, when deviation glass 2 moved to 5mm place, horizontal line top by horizontal line below 5mm, this incident light was offset 0.02+0.02=0.04mm altogether, is equivalent to be offset 1/600inch.

Suppose the refractive index n 1=1 of air; The refractive index n 2=1.5 of glass; The thickness of deviation glass is 3mm, if desire to make incident light to be offset half picture point (Pixel) distance, is example with 300dpi, the width of each image is 1/300inch, then the side-play amount of incident light should be 1/600 (inch)=0.042333 (mm), the figure of its skew as shown in Figure 3, wherein:

The angle of θ 1 expression incident light and normal N;

The angle of θ 2 expression refract lights and normal N;

At this moment Promptly

Be SH=A * sin (θ 1-θ 2) ... (2)

(1) substitution (2) is got: $\mathrm{SH}=\frac{3}{\cos \mathrm{\θ}2}\×\sin (\mathrm{\θ}1-\mathrm{\θ}2)\…\…\…\…\…\…\left(3\right)$

Get by refraction theorem: n1 * sin θ 1=n2 * sin θ 2

Wherein: n1=1, n2=1.5

So sin θ 1=1.5 * sin θ 2 ... (4)

Now cooperate explanation for an embodiment, suppose that sweep limit is A4 Size, its width is 210mm, because the glass width must be greater than sweep limit, therefore getting the glass width in the present embodiment is 250mm; At this moment, if make deviation glass 2 right-hand members up raise 5mm, then this deviation glass 2 is sin with horizontal angle theta 1 (it is same as above-mentioned θ 1) ^-15/250=1.146 °, this value substitution formula (4) is got θ 2=0.764 °.With θ 1, θ 2 substitution formula (3), then can get SH=0.02mm again.In other words, be that 250mm, thickness are that the right-hand member of the deviation glass 2 of 3mm is up raised apart from horizontal line 5mm if make width, then can make incident light be offset 0.02mm to the right; In like manner, if the right-hand member of deviation glass 2 is reduced apart from horizontal line 5mm, then can make incident light be offset 0.02mm left.

See also shown in Figure 4ly, this deviation glass 2 places on the moving frame (not shown), preferably is positioned on the light path of file and catoptron 9, and along with frame moves, so, then can saves deviation glass 2 materials, only needs bar shaped glass to get final product, and does not need large-area glass.

In sum, the scanister that the present invention has high-res utilizes glass to the ray refraction principle, makes half imaging point of light path translation of scanned object, obtains the point of image and the image information between point by this.

Claims (3)

1. scanister with high-res, it comprises: a shell; The light source of one scan object; One capture mechanism; It is characterized in that a deflection of light member is set between scanned object and the capture mechanism; Utilize the light refraction principle, make a bit of distance of light path translation of scanned object, obtain the image information between points of former image by this.

2. the scanister with high-res as claimed in claim 1, it is characterized in that, described deviation member is the transparent deviation glass of a slice, the one end connects a permanent magnet, be provided with an electromagnet with the corresponding position of described permanent magnet, and the other end of deviation glass is engaged on the fulcrum of a movable object, makes deviation deflect on glass.

3. the scanister with high-res as claimed in claim 2 is characterized in that, connects a counter-balanced heavy hammer on the described movable object, to the formed moment of movable object, makes electromagnet can come mobile deviation member with less energy with balance deviation member.

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