CN214228299U - Vertical prism scanning device - Google Patents
Vertical prism scanning device Download PDFInfo
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- CN214228299U CN214228299U CN202120173264.2U CN202120173264U CN214228299U CN 214228299 U CN214228299 U CN 214228299U CN 202120173264 U CN202120173264 U CN 202120173264U CN 214228299 U CN214228299 U CN 214228299U
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Abstract
The utility model discloses a vertical prism scanning device belongs to scanning imaging technical field. The technical problems of weak imaging distortion correction capability and poor imaging quality in the prior art are solved. The vertical prism scanning device comprises a free-form surface prism, an installation part, a camera part and an image acquisition part, wherein a plane and at least two free-form surfaces exist on the surface of the free-form surface prism and are installed around the camera part through the installation part; the image light beam of the shot object on the bottom plane can be projected into the camera shooting part after passing through the refraction of a free-form surface of the free-form surface prism, the reflection of the plane and the refraction of the other free-form surface and forms an image on the lighting surface of the image acquisition part after passing through the camera shooting part; the image acquisition part can acquire the image data of the shot object according to the light beam received on the lighting surface and transmit the image data to the display to display the image of the shot object; the angle between the bottom plane and the display is 80-100 deg.. The utility model is used for improve vertical scanning device's imaging quality.
Description
Technical Field
The utility model belongs to the technical field of the scanning formation of image, especially a vertical prism scanning device.
Background
At present, a vertical scanning system shoots and scans articles such as files, labels and the like on a bottom plane by using a plane mirror and a camera, wherein the camera carried by a display and the bottom plane generally form a 90-degree right angle, so that the plane mirror is required to deflect light rays of shot objects and project the shot objects into the camera.
The inventor finds that the prior art has at least the following technical problems:
in the prior art, the image of a plane mirror on a plane object generates larger trapezoidal distortion, and although a more complex algorithm can be used for identifying and correcting the image and characters in the following process, the correction capability is limited, and the technical problem of poor imaging quality caused by weak imaging correction capability in the prior art still cannot be effectively solved.
SUMMERY OF THE UTILITY MODEL
The utility model provides a vertical prism scanning device, the imaging distortion correction ability that has solved prior art existence is weak, the relatively poor technical problem of imaging quality.
The embodiment of the utility model provides a following technical scheme at least:
the embodiment of the utility model provides a vertical prism scanning device, including free-form surface prism, installation department, portion of making a video recording and image acquisition portion, wherein:
the surface of the free-form surface prism is provided with a plane and at least two free-form surfaces, and the free-form surface prism is arranged around the camera shooting part through the mounting part;
the image light beam of the shot object on the bottom plane can be projected into the camera shooting part after passing through the refraction of a free-form surface of the free-form surface prism, the reflection of the plane and the refraction of the other free-form surface and forms an image on the lighting surface of the image acquisition part after passing through the camera shooting part;
the image acquisition part can acquire the image data of the shot object according to the light beam received on the lighting surface of the image acquisition part and transmit the image data to the display to display the image of the shot object;
the included angle between the bottom plane and the display is 80-100 degrees.
Preferably or optionally, the surface of the free-form surface prism has three surfaces, the three surfaces are an incident surface, a reflecting surface and an exit surface, the incident surface and the exit surface are both free-form surfaces, the reflecting surface is a plane, and the reflecting surface is provided with a reflecting film.
Preferably or optionally, the mounting part forms a housing of the free-form surface prism, and the mounting part is connected with the top of the display.
Preferably or optionally, the mounting portion is fixedly connected with the housing of the display through a sliding groove, a buckle or a clamping manner.
Preferably or optionally, the free-form surface prism is fixedly connected with the mounting part in a buckling or bonding mode.
Preferably or optionally, the image acquisition part is a CCD or CMOS sensor.
Preferably or optionally, the image capturing unit is a camera and includes a diaphragm and a lens group, a light hole is formed in the diaphragm, and a light beam passes through the light hole, irradiates the lens group, and is refracted to the image capturing unit through the lens group.
Preferably or optionally, the included angle between the lighting surface of the image acquisition part and the bottom plane is 80-100 degrees.
Preferably or optionally, the display is a flat panel display and the angle between the display and the bottom plane is 85-95 °.
Preferably or optionally, the shape of the free-form surface satisfies the following equation:
x, y and Z represent intercept coordinates of the intersection point of the ray and the surface of the free-form surface;
k is the conic coefficient of the curved surface, and the value of k is 0;
c is the curvature of the lens, R is the curvature radius, and the formula c is 1/R;
incident face 10< R <90, preferably 50.02,
-90< R < -10, preferably-55.426, of the exit face;
ai is a polynomial coefficient, which has 44 values; i is a running number of 44 values, 44 values a1, a2, A3.. a43, a44, for the incident face, in the following order:
0、0、0、0、0、0、0、1.24E-05、0、6.17E-06、8.40E-07、0、4.09E-07、 0、1.96E-08、0、3.76E-07、0、-4.41E-07、0、-5.12E-08、1.61E-07、 0、7.27E-08、0、1.30E-07、0、1.76E-08、0、5.76E-08、0、-5.58E-08、 0、-2.91E-08、0、-4.63E-09、2.29E-08、0、-3.58E-09、0、1.84E-08、 0、6.14E-09、0、1.17E-09；
44 values a1, a2, A3.. a43, a44, for the exit face, in order:
0、0、0、0、0、0、0、-2.87E-04、0、-1.98E-04、-5.61E-04、0、-4.26E-04、0、1.10E-05、0、8.71E-04、0、8.24E-04、0.00E+00、6.20E-04、 9.16E-04、0、1.00E-03、0、7.38E-04、0、-5.48E-06、0、-6.07E-04、 0、-1.07E-03、0、-3.60E-04、0、-6.86E-04、-5.30E-04、0、-8.91E-04、 0、-9.48E-04、0、-3.23E-04、0、-3.17E-04；
there are 44 equations Ei (x, y), i is the sequence number of 44 equations, and 44 equations E1(x, y), E2(x, y), E3(x, y).. E43(x, y), E44(x, y) are in turn:
x1y0, x0y1, x2y0, x1y1, x0y2, x3y0, x2y1, x1y2, x0y3, x4y0, x3y1, x2y2, x1y2, x0y2, x5y2, x4y2, x3y2, x2y2, x1y2, x0y2, x6y2, x5y2, x4y2, x3y2, x2y2, x1y2, x0y2, x7y 2, x6y2, x5y2, x4y2, x3y2, x2y2, x1y2, x0y2, x8y 2, x6y2, x5y2, x4y2, x3y2, x2y2, x1y2, x8y 2, x3y2, and the following number is x3y2, x2, y2, x3y2, and the following the number is the number.
For the plane of incidence, x-0.0000000000E +00, y-6.0639123873E + 01Z-0.0000000000E + 00;
for the exit face, x is 0.0000000000E +00, y is 5.4038300374E-01; Z-2.6477135881E-03.
Any one of the above technical solutions can produce at least the following technical effects:
because the utility model discloses well free-form surface prism is more for the plane mirror degree of freedom, eliminates the aberration and reduces optical system's the constitutional unit effect more ideal, so when using free-form surface prism, can obtain good formation of image distortion corrective capability, and then improve the imaging quality, so solved that the formation of image distortion corrective capability that prior art exists is weak, the relatively poor technical problem of imaging quality.
Drawings
Fig. 1 is a structural diagram of a vertical prism scanning device according to an embodiment of the present invention;
fig. 2 is a light path diagram of a vertical prism scanning device according to an embodiment of the present invention;
fig. 3 is a diagram comparing distortion correction capabilities of the vertical prism scanning device and the plane mirror type vertical scanning system according to the embodiment of the present invention;
in the figure, 100, a display; 101. an image acquisition unit; 110. a display panel; 120. an image pickup unit; 121. a bottom plane; 122. a diaphragm; 200. a prism portion of the scanning device; 210. an installation part; 220. a free-form surface prism; 221. an incident surface; 222. a reflective surface; 223. an exit surface; 3. a light beam.
Detailed Description
The present invention is described in detail below with reference to fig. 1 to 3, and as shown in fig. 1 to 3, an embodiment of the present invention provides a vertical prism scanning device, which includes a free-form surface prism 220, an installation portion 210, a camera portion 120, and an image acquisition portion 101, wherein:
the surface of the free-form surface prism 220 is a flat surface and at least two free-form surfaces, and the free-form surface prism 220 is installed around the image pickup unit 120 through the installation unit 210;
the image beam 3 of the object to be photographed on the bottom plane 121 can be projected into the image pickup part 120 after passing through the refraction of one free-form surface, the reflection of the plane and the refraction of the other free-form surface of the free-form surface prism 220, and is imaged on the lighting surface of the image acquisition part 101 after passing through the image pickup part 120;
the image acquisition part 101 can acquire the image data of the shot object according to the light beam 3 received on the lighting surface and transmit the image data to the display 100 to display the image of the shot object;
the angle between the bottom plane 121 and the display 100 is 80-100.
Because the utility model discloses well free-form surface prism 220 is more for the plane mirror degree of freedom, to eliminating the aberration and reducing optical system's constitutional unit effect more ideal, so when using free-form surface prism 220, can obtain good formation of image distortion corrective capability, and then improve the imaging quality.
As an alternative embodiment, the surface of the free-form surface prism 220 has three surfaces, the incident surface and the exit surface are both free-form surfaces, the reflection surface is a plane surface, the three surfaces are the incident surface 221, the reflection surface 222 and the exit surface 223, respectively, and the reflection surface is provided with a reflection film. When the incident surface and the emergent surface are both free-form surfaces, the light beam 3 can be corrected, so that high-quality imaging is obtained. The incident surface 221 and/or the exit surface 223 may also be provided with an antireflection film.
In an alternative embodiment, the mounting portion 210 forms a housing for the freeform prism 220 and is attached to the top of the display 100. The mounting portion 210 functions to fix the position of the free-form surface prism 220.
As an alternative embodiment, the mounting portion 210 is fixedly connected to the housing of the display 100 by a sliding slot, a snap, or a clamping. The above-mentioned fixed connection mode is the mode of detachable connection, has made things convenient for dismouting and maintenance of installation department 210 and free-form surface prism 220.
As an alternative embodiment, the free-form surface prism 220 is fixedly connected with the mounting portion 210 by means of a snap or adhesive. The buckle is a detachable connection mode, which facilitates the disassembly, assembly and maintenance of the free-form surface prism 220. The bonding has the advantages of simple connection operation and strong connection force.
As an alternative embodiment, the image capturing part 101 is a CCD (Charge Coupled Device, chinese translation: Charge Coupled Device) or CMOS sensor. The CCD sensor has the advantages of good imaging quality, small volume, light weight and low power consumption. The CMOS sensor has the advantages of high integration level, low power consumption, high speed and low cost.
As an alternative embodiment, the image capturing unit 120 is a camera, the pixel of the camera may be about 1200 thousands, the camera includes a diaphragm and a lens group, a light transmission hole is formed in the diaphragm, and the light beam 3 passes through the light transmission hole, irradiates onto the lens group, and is refracted to the image capturing unit 101 through the lens group. The diaphragm concentrates light rays more, and the lens group makes images displayed clearly on the lighting surface of the image acquisition part 101 by using refraction.
In an alternative embodiment, the angle between the lighting surface of the image capturing part 101 and the base plane 121 is 80 ° to 100 °. Under the angle, the lighting surface of the image acquisition part 101 is approximately parallel to the display 100, which is beneficial to making the structure of the product more compact.
In an alternative embodiment, the display 100 is a flat panel display and is angled from 85 ° to 95 ° from the bottom plane 121. This range of angles facilitates a user viewing content displayed by the display 100 through the display 100.
As an alternative embodiment, the shape of the free-form surface satisfies the following equation:
x, y and Z are intercept coordinates of the intersection point of the light ray and the surface of the free-form surface;
k is the conic coefficient of the curved surface, and the value of k is 0;
c is the curvature of the lens, R is the curvature radius, and the formula c is 1/R;
incident plane 10< R <90, preferably incident plane R50.2,
exit face-90 < R < -10, preferably exit face R ═ 55.426;
ai is a polynomial coefficient having 44 values, i is the order of the 44 values, 44 values a1, a2, A3.. a43, a44, in order for the plane of incidence:
0、0、0、0、0、0、0、1.24E-05、0、6.17E-06、8.40E-07、0、4.09E-07、 0、1.96E-08、0、3.76E-07、0、-4.41E-07、0、-5.12E-08、1.61E-07、 0、7.27E-08、0、1.30E-07、0、1.76E-08、0、5.76E-08、0、-5.58E-08、 0、-2.91E-08、0、-4.63E-09、2.29E-08、0、-3.58E-09、0、1.84E-08、 0、6.14E-09、0、1.17E-09；
44 values a1, a2, A3.. a43, a44, for the exit face, in order:
0、0、0、0、0、0、0、-2.87E-04、0、-1.98E-04、-5.61E-04、0、 -4.26E-04、0、1.10E-05、0、8.71E-04、0、8.24E-04、0.00E+00、6.20E-04、 9.16E-04、0、1.00E-03、0、7.38E-04、0、-5.48E-06、0、-6.07E-04、 0、-1.07E-03、0、-3.60E-04、0、-6.86E-04、-5.30E-04、0、-8.91E-04、 0、-9.48E-04、0、-3.23E-04、0、-3.17E-04；
among the above values, a1 is 0, a2 is 0, A3 is-9.99E-03, and so on, a44 is 1.42E-06 (scientific counting);
there are 44 equations Ei (x, y), i is the sequence number of 44 equations, and 44 equations E1(x, y), E2(x, y), E3(x, y).. E43(x, y), E44(x, y) are in turn:
x1y0, x0y1, x2y0, x1y1, x0y2, x3y0, x2y1, x1y2, x0y3, x4y0, x3y1, x2y2, x1y2, x0y2, x5y2, x4y2, x3y2, x2y2, x1y2, x0y2, x6y2, x5y2, x4y2, x3y2, x2y2, x1y2, x0y2, x7y 2, x6y2, x5y2, x4y2, x3y2, x2y2, x1y2, x0y2, x8y 2, x6y2, x5y2, x4y2, x3y2, x2y2, x1y2, x8y 2, x3y2, and the following number is x3y 2;
e1(x, y) ═ x1y0, i.e., the first power of x times the 0 th power of y, E2(x, y) ═ x0y 1; by analogy, E44(x, y) is x0y8, i.e., x to the 0 th power of x times y to the 8 th power of y.
For the plane of incidence, x-0.0000000000E +00, y-6.0639123873E + 01Z-0.0000000000E + 00;
for the exit face, x is 0.0000000000E +00, y is 5.4038300374E-01; Z-2.6477135881E-03.
The free-form surface can be designed by adopting optical studio software of Zemax.
Above-mentioned technical scheme has only embodied the utility model discloses technical scheme's preferred technical scheme, some changes that this technical field's technical personnel probably made to some parts wherein have all embodied the utility model discloses a principle belongs to within the protection scope of the utility model.
Claims (9)
1. The utility model provides a vertical prism scanning device which characterized in that, includes free-form surface prism, installation department, portion of making a video recording and image acquisition portion, wherein:
the surface of the free-form surface prism is provided with a plane and at least two free-form surfaces, and the free-form surface prism is arranged around the camera shooting part through the mounting part;
the image light beam of the shot object on the bottom plane can be projected into the camera shooting part after passing through the refraction of a free-form surface of the free-form surface prism, the reflection of the plane and the refraction of the other free-form surface and forms an image on the lighting surface of the image acquisition part after passing through the camera shooting part;
the image acquisition part can acquire the image data of the shot object according to the light beam received on the lighting surface of the image acquisition part and transmit the image data to the display to display the image of the shot object;
the included angle between the bottom plane and the display is 80-100 degrees.
2. The vertical prism scanning device according to claim 1, wherein the surface of the free-form surface prism has three surfaces, which are an incident surface, a reflecting surface, and an exit surface, respectively, the incident surface and the exit surface being free-form surfaces, the reflecting surface being a flat surface, the reflecting surface being provided with a reflecting film.
3. The upright prism scanning device of claim 1, wherein the mounting portion forms a housing for the freeform prism and the mounting portion is coupled to the top of the display.
4. The vertical prism scanning device according to claim 1, wherein the mounting portion is fixedly connected to the housing of the display by a sliding slot, a snap or a clamp.
5. The vertical prism scanning device according to claim 1, wherein the free-form surface prism is fixedly connected to the mounting portion by means of a snap or adhesive.
6. The vertical prism scanning device according to claim 1, wherein the image capturing part is a CCD or CMOS sensor.
7. The vertical prism scanning device according to claim 1, wherein the image capturing unit is a camera head, and comprises a diaphragm and a lens set, wherein the diaphragm has a light hole, and the light beam passes through the light hole, irradiates the lens set, and is refracted to the image capturing unit through the lens set.
8. The vertical prism scanning device according to claim 1, wherein an angle between a lighting surface of the image capturing portion and the bottom plane is 80 ° -100 °.
9. The vertical prism scanning device according to claim 1, wherein the display is a flat panel display and the angle between the display and the bottom plane is 85 ° -95 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120173264.2U CN214228299U (en) | 2021-01-22 | 2021-01-22 | Vertical prism scanning device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120173264.2U CN214228299U (en) | 2021-01-22 | 2021-01-22 | Vertical prism scanning device |
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| CN214228299U true CN214228299U (en) | 2021-09-17 |
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| CN202120173264.2U Active CN214228299U (en) | 2021-01-22 | 2021-01-22 | Vertical prism scanning device |
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- 2021-01-22 CN CN202120173264.2U patent/CN214228299U/en active Active
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