CN111047798B - Linear spot lens, linear optical device and pos machine optical scanning system - Google Patents

Abstract

The invention discloses a linear light spot lens, a linear optical device and an optical scanning system of a pos machine. The above-mentioned linear spot lens includes a lens body, the lens body has an incident surface and an exit surface arranged oppositely, and the incident surface is flat; the two ends of the exit surface are convex and the middle is concave, so that the The exit surface forms two opposite convex ends and two opposite concave ends, and the ratio of the curvature radius of the convex end to the curvature radius of the concave end is 3-5:9-11; the linear optical device It includes lamp beads, light blocking windows and the above-mentioned linear light spot lens arranged in sequence; the pos machine optical scanning system includes the above-mentioned linear optical device. The linear light spot lens of the invention has simple structure and low cost.

Description

Linear spot lens, linear optical device and pos machine optical scanning system

technical field

The invention relates to the technical field of optical systems, in particular to a linear light spot lens, a linear optical device and a pos machine optical scanning system.

Background technique

Electronic payment has now become the mainstream consumer payment method, and pos, as a main electronic payment method, has become more and more widely used. When the pos machine is in use, it needs to have a positioning light spot aligned with the QR code to quickly align and scan. Alignment of linear light spots is also a commonly used solution, but the current linear light spots generally need to be formed by a combination of lenses, which results in a complex optical path and high cost of the optical system.

SUMMARY OF THE INVENTION

Based on this, it is necessary for the present invention to provide a linear spot lens with a simple structure and low cost.

The present invention also provides a linear optical device.

The invention also provides an optical scanning system of a pos machine.

In order to realize the purpose of the present invention, the present invention adopts the following technical solutions:

A linear spot lens includes a lens body, the lens body has an incident surface and an exit surface arranged oppositely, the incident surface is in a plane shape; the two ends of the exit surface are convex and the middle is concave, so that the The exit surface forms two opposite convex ends and two opposite concave ends, and the ratio of the curvature radius of the convex end to the curvature radius of the concave end is 3-5:9-11.

In the above-mentioned linear spot lens, after the light is incident on the incident surface, it is condensed into a narrow line by the convex ends of the exit surface, and the narrow line is elongated by the concave end. The curvature radius is set at a specific ratio, so that the light can be elongated with a better ratio, and the light loss can be reduced, thereby obtaining a narrow and long linear light spot with high brightness. The linear light spot lens has a simple structure and can be used with Get a linear spot at a lower cost.

In some embodiments, the protruding end forms the bottom surface and the top surface of the lens body, the concave end forms the side surface of the lens body, and the height of the lens body is greater than the width of the lens body.

In some of the embodiments, the radius of curvature of the protruding end is 4.5 mm.

In some of the embodiments, the radius of curvature of the protruding end is 10 mm.

The present invention also provides a linear optical device, comprising a lamp bead, a light blocking member and a linear light spot lens arranged in sequence, the light blocking member is provided with a light transmission window corresponding to the lamp bead, and the linear light spot lens includes a lens The lens body has an incident surface and an exit surface arranged oppositely, and the incident surface is in the shape of a plane; the two ends of the exit surface are convex and the middle is concave, so that the exit surface forms two opposite convexities For the outgoing end and the two opposite concave ends, the ratio of the curvature radius of the convex end to the curvature radius of the concave end is 3-5:9-11.

In some embodiments, the protruding end forms the bottom surface and the top surface of the lens body, the concave end forms the side surface of the lens body, and the height of the lens body is greater than the width of the lens body.

In some of the embodiments, the radius of curvature of the protruding end is 4.5 mm.

In some of the embodiments, the radius of curvature of the protruding end is 10 mm.

The present invention also provides an optical scanning system of a pos machine, including the linear optical device.

In some of the embodiments, the optical scanning system of the pos machine further includes a casing, the casing is provided with an installation opening, and the linear light spot lens is installed in the installation opening.

Description of drawings

1 is a schematic structural diagram of a linear spot lens according to Embodiment 1 of the present invention;

FIG. 2 is a schematic structural diagram of another viewing angle of the linear spot lens described in FIG. 1;

3 is a schematic structural diagram of a rectangular light spot after blocking light emitted by the linear light spot lens described in FIG. 1;

4 is a schematic structural diagram of a light spot emitted by the linear light spot lens described in FIG. 1;

5 is a schematic structural diagram of the linear optical device according to the second embodiment of the present invention;

FIG. 6 is a schematic structural diagram of the optical scanning system of the pos machine according to the second embodiment of the present invention.

Detailed ways

In order to facilitate understanding of the present invention, the present invention will be described more fully below. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that a thorough and complete understanding of the present disclosure is provided.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention.

Example 1

Please refer to FIG. 1 and FIG. 2 , the present invention provides a linear light spot lens 100 for forming a linear light spot, which can be applied to an optical system that requires a linear light spot. The linear spot lens 100 includes a lens body 10, the lens body 10 has an incident surface 20 and an exit surface 30 arranged oppositely, the incident surface 20 is planar, the exit surface 30 is a deformed aspheric surface, and the exit surface 30 is convex at both ends The exit and the middle are concave, so that the exit surface 30 forms two opposite convex ends 31 and two opposite concave ends 32, and the curvature radius of the convex end 31 is smaller than the curvature radius of the concave end 32. Specifically, the convex The ratio of the radius of curvature of the outgoing end 31 to the radius of curvature of the concave end 32 is 3-5:9-11.

When the linear spot lens 100 is working, please refer to FIG. 3 . After the light is incident on the incident surface, the light is condensed into a narrow line by the convex ends of the exit surface, and the narrow line is elongated by the concave end. , the radius of curvature of the convex end and the radius of curvature of the concave end are set in a specific ratio, so that the light can be elongated with a better ratio, and the light loss can be reduced, thereby obtaining a narrow and long linear light spot with high brightness, Referring to FIG. 4 , the linear light spot lens has a simple structure and can obtain a linear light spot at a lower cost.

The lens body 10 is a cylindrical lens, which is processed to form the above-mentioned linear spot lens 100 .

Please refer to FIG. 1 , wherein the size of the protruding end 31 of the exit surface 30 is smaller than the size of the concave end 32 . Thus, the lens body 10 having a height greater than its length and width is formed, which is more favorable for forming a longer linear light spot. Specifically, the convex end 31 forms the bottom surface and the top surface of the lens body 10 , the concave end 32 forms the side surface of the lens body 10 , and the height of the lens body 10 is greater than the width of the lens body 10 . For example, the height h of the lens body 10 is 7 mm-10 mm, and the width a of the lens body 10 is 1 mm-5 mm. This ratio can better adjust the shape of the light to achieve the purpose of obtaining linear light. Of course, the height and width of the lens body 10 may also be other ratios, which are not limited here, as long as the above conditions are satisfied.

The height h of the lens body 10 used is 8 mm, and the width a of the lens body 10 is 3 mm.

On the lens body 10 , the convex end 31 forms the bottom surface 11 and the top surface of the lens body 10 , the concave end 32 forms the side surface 12 of the lens body 10 , and the height of the lens body 10 is greater than the width of the lens body 10 . The lens body 10 obtained in this way can draw longer light rays, and can obtain longer linear rays.

The ratio of the radius of curvature of the convex end 31 to the radius of curvature of the concave end 32 is 4-5:9.5-10.5. Adjusting the radius of curvature of the convex end 31 and the concave end 32 within this range can make it easier to obtain narrow and long linear light. For example, the ratio of the radius of curvature of the convex end 31 to the radius of curvature of the concave end 32 is 4.5:10.

The above-mentioned linear spot lens 100 can be applied to any equipment that requires linear light, such as a pos machine optical system, a laser system, and the like.

The effect of the above-mentioned linear spot lens 100 will be verified by experiments below, and the same light source is used to ensure that the light source and the lens maintain the same distance. Table 1 shows the ratio of the curvature radius R1 of the convex end 31 to the curvature radius R2 of the concave end 32 of the linear spot lens participating in the test, and the obtained spot length L and width D and the brightness of the spot.

Table I

R1:R2 L(mm) D(mm) brightness Test one 4.5:10 180 9 brighter Test two 3:9 185 10 brighter Test three 5:9.5 176 9.5 brighter Test four 3:10.5 180 8.5 brighter Test five 5:11 180 10 brighter Test six 1:10 160 12 brighter Test seven 1:1 150 12.5 dark edge Test eight 2:15 166 11 Normal brightness

It can be seen from the test in Table 1 that the ratio of the curvature radii of the lenses in Examples 1 to 5 is kept in the range of 3-5:9-11, and the final emitted light spot is relatively long and narrow, and the brightness is better. The ratios of the radii of curvature of the lenses of Examples 6 to 8 are not within the above-mentioned range, their linearity is not high, their lengths are shorter than those of Examples 1 to 5, and their widths are larger, and their linear conversion degrees are not good enough. . It is proved that the linearity of the light emitted by the lens of the present invention is relatively high.

Embodiment 2

Referring to FIG. 5 , this embodiment provides a linear optical device 200 , which includes a lamp bead 40 , a light blocking member 50 and the linear light spot lens 100 described in the first embodiment, and the light blocking member 50 is provided with a corresponding lamp. The light-transmitting window 51 of the bead 40, the linear spot lens 100 includes a lens body 10, the lens body 10 has an incident surface 20 and an exit surface 30 arranged oppositely, the incident surface 20 is a plane shape, and the exit surface 30 is a deformed aspheric surface. The two ends of the surface 30 are convex and the middle is concave, so that the exit surface 30 forms two opposite convex ends 31 and two opposite concave ends 32, and the curvature radius of the convex ends 31 is smaller than that of the concave ends 32. The radius of curvature, specifically, the ratio of the radius of curvature of the convex end 31 to the radius of curvature of the concave end 32 is 3-5:9-11.

When the linear optical device 200 is in operation, the light emitted by the lamp bead 40 is trimmed into a basic rectangular beam through the light-transmitting window 51 , and the rectangular beam is distributed by the linear spot lens 100 to finally emit a linear spot.

Wherein, the distance from the lamp bead 40 to the linear light spot lens 100 will affect the length and shape of the final emitted light spot, but the obtained light is still a linear light spot with a better shape. In this embodiment, the distance from the lamp bead 40 to the linear light spot lens 100 is set to 10mm-30mm. Preferably, the distance from the lamp bead 40 to the linear light spot lens 100 is set to 10 mm.

Embodiment 3

Referring to FIG. 6 , this embodiment provides an optical scanning system for a POS machine, including the line-type optical device 200 described in the second embodiment. That is, the linear optical device 200 described in the second embodiment is applied to a POS machine. As an optical device of the POS machine, the light is concentrated into a linear light spot and aligned with the two-dimensional code, so as to quickly align the two-dimensional code scanning and improve payment scanning. s efficiency.

Further, the optical scanning system of the pos machine further includes a housing 60 , and the housing 60 is provided with an installation opening 61 , and the linear spot lens 100 is installed in the installation opening 61 . The linear spot lens 100 is fixed by the housing 60, so that the linear spot lens 100 can function stably.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as limiting the scope of the patent of the present invention. It should be pointed out that for those skilled in the art, without departing from the concept of the present invention, several modifications and improvements can be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the appended claims.

Claims (10)

1. The linear facula lens is characterized by comprising a lens body, wherein the lens body is provided with an incident surface and an emergent surface which are oppositely arranged, and the incident surface is planar; the two ends of the emergent surface are convex, the middle of the emergent surface is concave, so that two opposite convex ends and two opposite concave ends are formed on the emergent surface, the emergent surface is a deformed aspheric surface, and the ratio of the curvature radius of the convex ends to the curvature radius of the concave ends is 3-5: 9-11, the lens body is used for converting the rectangular light beam into a linear light spot.

2. The line-spot lens of claim 1, wherein the convex ends form a bottom surface and a top surface of the lens body, the concave ends form side surfaces of the lens body, and the height of the lens body is greater than the width of the lens body.

3. The line spot lens of claim 1 wherein the radius of curvature of the convex end is 4.5 mm.

4. The line spot lens of claim 1 or 3 wherein the radius of curvature of the convex end is 10 mm.

5. A linear optical device is characterized by comprising a lamp bead, a light blocking component and a linear facula lens which are sequentially arranged, wherein the light blocking component is provided with a light transmitting window corresponding to the lamp bead, and the light transmitting window is used for obtaining rectangular light; the linear light spot lens comprises a lens body, wherein the lens body is provided with an incident surface and an emergent surface which are oppositely arranged, and the incident surface is planar; the two ends of the emergent surface are convex, the middle of the emergent surface is concave, so that two opposite convex ends and two opposite concave ends are formed on the emergent surface, the emergent surface is a deformed aspheric surface, and the ratio of the curvature radius of the convex ends to the curvature radius of the concave ends is 3-5: 9-11, the lens body is used for converting the rectangular light beam into a linear light spot.

6. The linear optical device according to claim 5, wherein the convex ends form a bottom surface and a top surface of the lens body, the concave ends form side surfaces of the lens body, and the height of the lens body is greater than the width of the lens body.

7. The linear optical device according to claim 5, wherein the convex end has a radius of curvature of 4.5 mm.

8. A linear optical device according to claim 5 or claim 7, in which the convex end has a radius of curvature of 10 mm.

9. A pos machine optical scanning system comprising a linear optical device according to any of claims 5-8.

10. The pos machine optical scanning system of claim 9, further comprising a housing having a mounting port to which the linear spot lens is mounted.

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