CN200956168Y

CN200956168Y - Barcode identifying-reading device imaging system

Info

Publication number: CN200956168Y
Application number: CN 200620077313
Authority: CN
Inventors: 孙亚力; 刘荣生; 许猛鸿; 陈文传
Original assignee: Fujian New Continent Automatic Recognition Technology Coltd
Current assignee: Fujian New Continent Automatic Recognition Technology Coltd
Priority date: 2006-09-15
Filing date: 2006-09-15
Publication date: 2007-10-03
Anticipated expiration: 2016-09-15

Abstract

The utility model relates to an imaging system of a bar code read-study device comprising a lens, sensitization device and an output interface, wherein a reflector is arranged between the light-sensitive surface of the lens and the sensitization device, a vertical axis line of the light-sensitive surface and an axis line of the lens form an included angle Telta, of which the included angle range is 80 degree to 100 degree, the reflector and the axis line of the lens form an included angle Alpha, of which the included angle is 40 degree to 50 degree because of adopting the above-mentioned structure, the bar code light goes through the reflector and changes the light path, thereby the distance in image space between the lens and the sensitive surface is shortened than that in the prior art greatly so as to shorten the horizontal length of the component of the imaging system and to reduce the volume of the imaging system.

Description

Bar code recognizing apparatus imaging system

Technical field

The utility model relates to bar code recognizing apparatus, relates in particular to the imaging system in the bar code recognizing apparatus of shooting formula.

Background technology

In the bar code recognizing apparatus of the formula of shooting, imaging system (SENSOR) is crucial parts, bar code recognizing apparatus imaging system as shown in Figure 1, comprise camera lens 1, sensor devices 2, output interface 3, be provided with optical lens 11 in the camera lens 1, outside bar code 4 is imaged on the light-sensitive surface 21 of sensor devices 2 by optical lens 11, distance between the light-sensitive surface 21 of optical lens 11 and sensor devices 2 is L, after the light-sensitive surface 21 of sensor devices 2 receives the imaging of outside bar code 4, it is changed into digital signal, and with digital signal by output interface 3, import internal memory into, carry out decoding processing by CPU.This imaging system assembly is an important component part of shooting formula bar code reader equipment, and its volume is more little, just can make the volume of equipment more little.

Summary of the invention

The utility model purpose provides a kind of volume that dwindles into the picture system component, especially shortens the bar code recognizing apparatus imaging system that imaging system length reaches reduced volume.

The utility model is achieved through the following technical solutions, imaging system comprises camera lens, sensor devices and output interface, a reflecting optics wherein is set between the light-sensitive surface of camera lens and sensor devices, the vertical central lines of light-sensitive surface and the axial line of camera lens form angle theta, this angle theta scope is 80 °～100 °, the axial line of reflecting optics and camera lens forms angle α, and this angle α scope is 40～50 °.

The utility model adopts above structure, make bar code light change light path by reflecting optics, so camera lens shortens apart from the picture side's distance than classic method greatly with the picture side of light-sensitive surface, thereby makes the contraction in length on the imaging system component level direction, reaches the purpose that dwindles into the picture system bulk.

Description of drawings

Now in conjunction with the accompanying drawings the utility model is further elaborated:

The light path synoptic diagram of the existing bar code recognizing apparatus imaging system of Fig. 1;

Fig. 2 is the light path synoptic diagram of the utility model imaging system;

Fig. 3 is the physical distance figure of the imaging system of one of the utility model embodiment;

Fig. 4 is the physical distance figure of two the imaging system of the utility model embodiment.

Embodiment

Shown in Fig. 2,3,4, the utility model imaging system comprises camera lens 1, sensor devices 2 and output interface 3, a reflecting optics 5 is set between the light-sensitive surface 21 of camera lens 1 and sensor devices 2, be provided with optical lens 11 in the camera lens 1, the axial line of the vertical central lines of light-sensitive surface 21 and camera lens 1 forms angle theta, this angle theta scope is 80 °～100 °, shape α in an angle between the axial line of reflecting optics 5 and camera lens 1, and this angle α scope is 40 °～50 °.Outside bar code 4 reflects through reflecting optics 5 by optical lens 11, be imaged on the light-sensitive surface 21 of sensor devices 2, after the light-sensitive surface 21 of sensor devices 2 receives the imaging of outside bar code 4, it is changed into digital signal, and with digital signal by output interface 3, import internal memory into, carry out decoding processing by CPU, when angle theta equaled 90 ° of angle α and equals 45 °, reflecting optics 5 transmitted imaging effect the best of outside bar code 4.So optical lens 11 is L to the distance of reflecting optics 5 ₁, reflecting optics 5 is L to the distance of light-sensitive surface 21 ₂, L ₁+ L ₂=L, the utility model L ₂Utilize the longitudinal space of bar code recognizing apparatus, thereby realize the nearly L of the utility model imaging system contraction in length ₂Distance.

As shown in Figure 3, when the axial line of the vertical central lines of light-sensitive surface 21 and camera lens 1 formed between the axial line that angle theta is 80 °, reflecting optics 4 and camera lens 1 shape α is 50 ° in an angle, imaging system length overall M2 equaled the plane of incidence 12 and adds L to optical lens 11 apart from a1 ₁Add the distance b 2 of reflecting optics 4 incidence points, that is: to the imaging system external margin

M2＝a1+L ₁+b2

As shown in Figure 4, when the axial line of the vertical central lines of light-sensitive surface 21 and camera lens 1 formed between the axial line that angle theta is 100 °, reflecting optics 4 and camera lens 1 shape α is 40 ° in an angle, imaging system length overall M3 equaled the plane of incidence 12 and adds L to optical lens 11 apart from a1 ₁Add the distance b 3 of reflecting optics 4 incidence points, that is: to the imaging system external margin

M3＝a1+L ₁+b3

Imaging system length overall M1=a1+L+1 shown in Figure 1, b1 are light-sensitive surface 21 distance to the imaging system external margin, by among the above figure as seen, b1 ≈ b2 ≈ b3, L=L ₁+ L ₂, therefore, adopt technical solutions of the utility model imaging system length overall M2, M3 the nearly L of contraction in length than traditional imaging system length overall M1 ₂Distance.

Claims

1, bar code recognizing apparatus imaging system, comprise camera lens, sensor devices and output interface, it is characterized in that: a reflecting optics is set between the light-sensitive surface of camera lens and sensor devices, the vertical central lines of light-sensitive surface and the axial line of camera lens form angle theta, this angle theta scope is 80 °～100 °, the axial line of reflecting optics and camera lens forms angle α, and this angle α scope is 40 °～50 °.

2, bar code recognizing apparatus imaging system according to claim 1 is characterized in that: the angle theta best angle is 90 °, and angle α best angle is 45 °.