CN2630943Y

CN2630943Y - Improved structure of bar code scanner

Info

Publication number: CN2630943Y
Application number: CN 03264277
Authority: CN
Inventors: 田凯元
Original assignee: SHENLEI PHOTOELECTRIC CO Ltd
Current assignee: SHENLEI PHOTOELECTRIC CO Ltd
Priority date: 2003-06-23
Filing date: 2003-06-23
Publication date: 2004-08-04
Anticipated expiration: 2013-06-23

Abstract

A modified structure of a bar code scanner, mainly comprises of a lightning luminophor, a collimator, a focusing lens and a line type receiver. When the linear ray produced by the lightning luminophor is projected to the bar through the collimator, the image can focus on the line type receiver though the focusing lens and produce barcode signal. The features is that one or more than one spectroscope and reflector is arranged on the projection path of the lightning luminophor and the collimator so that the scanner can be multi-light and make the light well-distributed therefore save the cost of light sources components.

Description

The improvement structure of barcode scanner

Technical field

The utility model is the improvement structure of relevant a kind of barcode scanner, especially refer to a kind of at the wherein improvement of light source projects structure, mainly be to utilize the above spectroscope of a slice and the setting of catoptron, and make this scanner can be with the structure of one group of laser luminophor and collimator, and can obtain light source projects effect more than two roads, make the distribution of light sources of launching even to reach, and the effect of saving the light source cost of parts.

Background technology

General known is the barcode scanner structure of light emitting source with the laser light, as shown in Figure 6, it is mainly constructed and includes laser luminophor a at least, collimator b (is generally horizontal plano-convex column type lens, can make light be flat belt-like), condenser lens c and line style receiver d (must be line style CCD sensor or line style CMOS sensor) etc. are formed, and laser luminophor a and collimator b are sides of being located at condenser lens c, the light of launching as laser luminophor a is after collimator b is converted to straight line light, think that again the flat ribbon ray cast is to bar code e, and it promptly focuses on the line style receiver d at the image that is reflected on the bar code e by condenser lens c, and this line style receiver award the light intensity distribution plan on the light face (as shown in Figure 7), be to be an arc curve distribution plan, the light luminance on the center line of line style receiver d the strongest (as center of curve line position) wherein at Fig. 7, and more near line style receiver d two side ends (receiver side, position as shown in phantom in Figure 7, be distance center line part far away more) then its brightness is weak more, be reflection ray and can't average reflection the awarding on the light face of the line style receiver of strip, and the defective that back-end circuit is difficult for understanding the barcode image information takes place.For improveing the defective of the known structure of above-mentioned Fig. 6, cause industry and have the people to research and develop to design as shown in Figure 8 known structure, wherein be that dual-side in condenser lens c is provided with one group of laser luminophor a and collimator b respectively, be incident upon on the bar code e and one group of light source can be overlapped; According to and its reflex to line style receiver d award on the light face the light intensity distribution plan as shown in Figure 9, it is rendered as a kind of plateau formula arc curve distribution plan (shown in Fig. 9 solid line zone, be that light overlap action by two dotted lines is formed), even the light range widens of projected area, and making can be comparatively even at the light intensity of awarding on the light face of line style receiver d, is reflected in the brightness that line style receiver d two kicks and strengthens to improve its read performance and can make; Only, its light intensity at the light face of the awarding dual-side that depends on line style receiver d (leaning on the vertical dotted line place as Fig. 9) is still disliked deficiency, and this known structure need use structures such as two groups of above laser luminophors and collimator, thereby can produce the shortcoming that increases material cost, so this known techniques also there is necessity of improvement again.

The inventor is because the defectives of above-mentioned two kinds of known barcode scanners structure study intensively, and long-pending individual is engaged in the making and design many years of experience of this cause, creates a kind of improvement of brand-new barcode scanner eventually and constructs.

Summary of the invention

Fundamental purpose of the present utility model is providing a kind of improvement structure of barcode scanner, is to allow the light the same effect of uniform that distributes, and can save a group or more the laser luminophor and the cost of collimator; Again, beam split is many more, then can make the even more of distribution of light.

The purpose of this utility model is to realize like this, a kind of improvement structure of barcode scanner, it is mainly constructed and includes laser luminophor, collimator, condenser lens and line style receiver at least, the line style ray cast that penetrates through collimator when the laser luminophor is during to bar code, and the image that it reflected promptly sees through condenser lens and gathers on the line style receiver with generation bar code signal; The ray cast path of laser luminophor and collimator is provided with a slice or above spectroscope and the catoptron of a slice, so that this scanner becomes the kenel of multiple light courcess.

When collimator of the present utility model is the plano-convex column type lens of transverse type, then place the light projection route the place ahead and tool one angle of inclination of laser luminophor with a spectroscope, and on spectroscopical reflection paths, be provided with spectroscope or catoptron more than a slice at least corresponding to this, some penetrates spectroscope and on the bar code in directive the place ahead but make light, other has part light to be reflected on the spectroscope or catoptron of respective side, reflexes on the same bar code in the place ahead again.

And collimator is when being non-spherical lens, then place the light projection route the place ahead and tool one angle of inclination of laser luminophor with a spectroscope, and on spectroscopical reflection paths, be provided with spectroscope or catoptron more than a slice at least corresponding to this, and invest the direction of bar code at the light of above-mentioned spectroscope and catoptron, respectively be provided with a vertical type lens pillar, it can directly make the light that casts out form elongated line style light.

Spectroscope of the present utility model, catoptron and vertical type lens pillar can be formed in one.

The utility model also can be respectively equipped with a catoptron again at the flat light belt of the multiple light courcess kenel that is formed by a slice or the spectroscope more than a slice and catoptron or the outer side edges of line style light, so that when ray cast arrives bar code, can be with both sides light more weak and exceed the light of awarding unemployed zone outside the light face, compensate to through these mirror reflects and contiguous to award light face marginal ray more weak zone, must make that light is more concentrated, light intensity evenly and can more effectively reflect light to the awarding on the light face of line style receiver.

This line style receiver is a CCD line style sensor; Also can be CMOS line style sensor.

In sum, structure of the present utility model can make throw light more concentrated really, distribution more even, and can reach the advantage and the effects such as flat cost of saving laser luminophor and collimator.

Description of drawings

Fig. 1 is the whole vertical view of one of the utility model barcode scanner embodiment.

Fig. 2 is the vertical view of the utility model barcode scanner time embodiment.

Fig. 3 is the vertical view of the another embodiment of the utility model barcode scanner.

Fig. 4 makes the enforcement stereographic map of special water chestnut mirror for spectroscope in the utility model and catoptron etc.

Fig. 5 A is the utility model barcode scanner vertical view of an embodiment again.

Fig. 5 B is the light intensity distribution plan by Fig. 5 A structure gained.

Fig. 6 is the whole vertical view of known structure.

Fig. 7 is for being constructed the light intensity distribution plan of gained by Fig. 6.

Fig. 8 is the whole vertical view of known another structure.

Fig. 9 is for being constructed the light intensity distribution plan of gained by Fig. 8.

Laser luminophor 10

Collimator 21,22

Condenser lens 30

Line style receiver 40

Bar code 50

Spectroscope 61,62

Catoptron 71,72,73

Vertical

type lens pillar

81,82,83

Embodiment

At first see also shown in Figure 1, the improvement structure of barcode scanner described in the utility model, it is mainly constructed and includes laser luminophor 10, collimator 21 (this collimator 21 is the plano-convex column type lens for transverse type, and it can directly change laser light into flat belt-like light), condenser lens 30 and line style receiver 40 (must be line style CCD sensor or line style CMOS sensor) etc. at least and formed; Its feature exists: be provided with a slice or spectroscope more than a slice 61,62 and catoptron 71 on the ray cast path of laser luminophor 10 and collimator 21, so that this scanner becomes the kenel of multiple light courcess, and make the distribution of light more even, and save the light source cost of parts.

As above-mentioned, please cooperate Fig. 2 and shown in Figure 3 in addition, (this collimator 22 is a non-spherical lens when adopting collimator 22 among this embodiment, laser light is changed into parallel point-like light beam, become line style light through the vertical type lens pillar of its collocation again), promptly on the path of bar code, need respectively to add in addition a vertical

type lens pillar

81,82,83 in spectroscope 61,62 and catoptron 71 projections, it can directly make the point-like parallel beam that casts out be converted to line style light, can project the bar code that will read.

And for example above-mentioned, the collimator of being lifted in the embodiment in figure 1 21 is the plano-convex column type lens of a transverse type, when seeing through this collimator 21, laser light is flat belt-like light, and present embodiment is light projection route the place ahead and tool one angle of inclination that places laser luminophor 10 with a spectroscope 61, and on reflection paths, be provided with a catoptron 71 corresponding to this spectroscope 61, some penetrates spectroscope 61 and on the bar code 50 in directive the place ahead but make light, other has part light to be reflected on the catoptron 71 of respective side, reflexes on the same bar code 50 in the place ahead again; According to and it can obtain the distribution of light effect as Fig. 9, so it can save the constructions cost of one group of laser luminophor and collimator than the known structure of Fig. 8.Same with above-mentioned kenel (as shown in Figure 2), collimator 22 wherein is a non-spherical lens, it can make the light by this collimator 22 change into the point-like light beam, this point-like light beam can become line style light through a vertical

type lens pillar

81,82 again, and present embodiment equally can be on its light source projects path suitable be provided with spectroscope 61 and catoptron 71, to reach described purpose as Fig. 1 embodiment.

See also shown in Figure 3 again, when implementing, the utility model also must between spectroscope 61 and catoptron 71, add a component light microscopic 62, the light source score that three roads are invested on the bar code 50 is penetrated by three directions of condenser lens 30, can increase the effect that a light source can evenly be adjusted its distribution of light easily again.In this embodiment, collimator 22 is a non-spherical lens again, so respectively establish a vertical

type lens pillar

81,82,83 light beam is changed into line style light at its point-like light beam front end.

Other sees also shown in the embodiment of Fig. 4, only from bottom to top the collimator 22 that sees through of wherein being located at the laser luminophor 10 of condenser lens 30 1 sides casts out, establish a spectroscope 61 above it earlier, establish a catoptron 71 in these spectroscope 61 tops again, and establish a catoptron 72 in aforementioned spectroscope 61 respective side, be provided with another catoptron 73 in these catoptron 72 tops again, make this two-

mirror

71 and 73 light that reflected get directive the place ahead, and respectively being provided with a vertical

type lens pillar

81 and 82 in the place ahead of two-

mirror

71 and 73, it can directly make the light that casts out form elongated line style light and invest same bar code.Again, the spectroscope 61 of this embodiment,

catoptron

71,72,73 and vertical

type lens pillar

81,82 etc. can as shown in the drawingly be can be directly by transparent material one-body molded (as special formed water chestnut mirror), and also can change into the enforcement state that is provided with for separation as other embodiment: light source projects direction wherein also can be sought suitable projecting direction for it again.

Please consult shown in Fig. 5 A again, this embodiment is respectively equipped with a vertical

type lens pillar

81 and 82 in spectroscope 61 and catoptron 71 the place aheads of Fig. 2 embodiment, and be respectively equipped with a

catoptron

72 and 73 again in the light source outer side edges that penetrates by vertical

type lens pillar

81,82, before arriving bar code 50 in ray cast, it can reflex to the light of two line style light outer side edges in the bar code zone; Light intensity distribution plan both sides light shown in Fig. 5 B a little less than, and exceed the light source (as parallel oblique line A) of awarding unemployed zone outside the light face, through the zone of these

catoptron

72,73 reflection compensations to parallel oblique line B, and make this light intensity distribution plan level off to rectangular curve, must make light more concentrated, more and effectively barcode image light is reflexed to awarding on the light face of line style receiver 40.

In sum, structure of the present utility model can make throw light more concentrated really, distribution more even, and can reach the advantage and the effects such as flat cost of saving laser luminophor and collimator, and be that a kind of more known article can be promoted the good of effect and relate to.

Again, more than only lift be possible embodiments more of the present utility model, can reach effect described in the utility model such as, and on light source or collimator, do easy variation person, all should be by the contained lid of claim of the present utility model.

Claims

1. the improvement of a barcode scanner is constructed, it is mainly constructed and includes laser luminophor, collimator, condenser lens and line style receiver at least, the line style ray cast that the laser luminophor penetrates through collimator is to bar code, and the image that it reflected promptly sees through condenser lens and gathers on the line style receiver with generation bar code signal; It is characterized in that:

The laser luminophor is provided with a slice with the ray cast path of collimator or a slice is above so that this scanner becomes the spectroscope and the catoptron of the kenel of multiple light courcess.

2. the improvement of barcode scanner is constructed according to claim 1, it is characterized in that: collimator is the plano-convex column type lens of transverse type, one spectroscope places the light projection route the place ahead and tool one angle of inclination of laser luminophor, on spectroscopical reflection paths, be provided with spectroscope or catoptron more than a slice at least corresponding to this, but some penetrates spectroscope and on the bar code in directive the place ahead light, other has part light to be reflected on the spectroscope or catoptron of respective side, reflexes on the same bar code in the place ahead again.

3. the improvement of barcode scanner is constructed according to claim 1, it is characterized in that: collimator is a non-spherical lens, one spectroscope places the light projection route the place ahead and tool one angle of inclination of laser luminophor, on spectroscopical reflection paths, be provided with spectroscope or catoptron more than a slice at least corresponding to this, and invest the direction of bar code at the light of above-mentioned spectroscope and catoptron, respectively be provided with one and can directly make the light that casts out form the vertical type lens pillar of elongated line style light.

4. as the improvement structure of barcode scanner as described in the claim 3, it is characterized in that: spectroscope, catoptron and vertical type lens pillar can be formed in one.

5. as the improvement structure of barcode scanner as described in claim 2 or 3, it is characterized in that: it is respectively equipped with a catoptron again at the flat light belt of the multiple light courcess kenel that is formed by a slice or the spectroscope more than a slice and catoptron or the outer side edges of line style light, when ray cast arrives bar code, both sides light is more weak and exceed the light of awarding unemployed zone outside the light face, compensates to vicinity through these mirror reflects and awards light face marginal ray more weak zone.

6. as the improvement structure of barcode scanner as described in the claim 5, it is characterized in that: the line style receiver is a CCD line style sensor.

7. as the improvement structure of barcode scanner as described in the claim 5, it is characterized in that: the line style receiver is a CMOS line style sensor.