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Imaging system and setting method thereof

An imaging system and imaging technology, applied in the field of optics, can solve the problems of high cost, increase the overall volume, increase cost, etc., and achieve the effect of reducing the resolution difference, reducing the included angle, and reducing the cost

Active Publication Date: 2021-07-16
SUZHOU RUINIU ROBOT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The first method is to further refine the lens so as to reduce the degree of field curvature as much as possible, but this method is expensive and the current technology is difficult to achieve the level of eliminating field curvature; the second method is to enlarge the image detection element 3, and the lens The distance between 1 and the image detection element 3 will increase, so the focal length of the lens 1 will increase. Generally, in order to ensure the imaging brightness and increase the passing luminous flux, the size of the lens 1 also needs to be increased accordingly, which is bound to increase Overall volume, increasing cost

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  • Imaging system and setting method thereof
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  • Imaging system and setting method thereof

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Embodiment 1

[0048] In this embodiment, in the single-lens imaging system of the visual sensor, the setting method of abandoning the entire field of view on one side of the main optical axis of the lens 1 is taken as an example for illustration. At this time, the lens is the lens 1 of the imaging system and is located in the detection range. The detection field angle β formed by the two endpoints of the obliquely set object plane A1-A3 and the center of the lens is equal to half of the lens field angle γ (β=1 / 2γ).

[0049] Such as Figure 5 and Figure 6 As shown, the target detection range H (object plane A1-A3) is allocated to the entire field of view on the side of the main optical axis 10 of the lens, and the near end point A3 of the object plane A1-A3 is located on the edge line on the left side of the lens field of view , the far point A1 of the object plane A1-A3 is located on the main optical axis 10 of the lens. This embodiment only utilizes half of the field of view of the lens...

Embodiment 2

[0054] In this embodiment, an example of setting aside more than half of the field of view in the single-lens imaging system of the visual sensor is used for illustration. At this time, the lens is the lens 1 of the imaging system, and the oblique object plane located within the detection range The detection field angle β formed by the two endpoints of A1-A3 and the lens center is less than half of the lens field angle γ (β﹤1 / 2γ).

[0055] Such as Figure 7 and Figure 8 As shown, the target detection range H (object plane A1-A3) is allocated within the entire field of view on the side reserved for the main optical axis 10 of the lens, and the near end point A3 of the object plane A1-A3 is located on the left edge of the lens field of view , the far end point A1 of the object plane A1-A3 is located on the right edge line of the reserved detection field of view. The imaging point of the laser spot or laser light pattern on the proximal point A3 is selectively imaged at the fi...

Embodiment 3

[0058] In this embodiment, in the single-lens imaging system of the visual sensor, the setting mode of less than half of the field of view is discarded as an example. At this time, the lens is the lens of the imaging system, and the obliquely set object plane A1 located within the detection range -The range of the detection field angle β formed by the two endpoints of A3 and the lens center is: 1 / 2γ﹤β≤3 / 4γ. Such as Figure 9 and Figure 10 As shown, the imaging situation of the chief ray in the light beam emitted by each detection point at different distances on the object surface 4 and the field curvature imaging surface at the corresponding distance is as follows: the detection point A1 on the object surface 4 is at the corresponding field curvature The imaging point on the imaging surface q1' is the field curvature imaging point a1', and the imaging point of the detection point A2 on the object surface 4 on the corresponding field curvature imaging surface q2' is the field...

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Abstract

The invention discloses an imaging system and a setting method thereof. The imaging system comprises a lens and an image detection element. The image detection element is arranged at a field curvature straight line or a straight line fitting line; the field curvature straight line is an imaging point connecting line formed by imaging two detection points which are located in a detection field angle range and have different distances from the lens on the corresponding field curvature imaging curved surface; the straight line fitting line is a straight line obtained by straight line fitting of imaging points formed by imaging a plurality of detection points with different distances from the lens on a corresponding field curvature imaging curved surface on an object surface within a detection field angle range; one edge line of the detection field angle coincides with one edge line of the lens field angle, and the detection field angle does not exceed 3 / 4 of the lens field angle. According to the system, the lowest detection resolution can be ensured, the resolution difference of imaging of objects at the near end and the far end in the detection field angle range on the image detection element is reduced, and the cost is reduced.

Description

technical field [0001] The invention relates to the field of optics, in particular to an imaging system and a setting method thereof. Background technique [0002] In the lens imaging system, due to the field curvature of the lens 1, there will inevitably be field curvature on the imaging surface, that is, the formed image is generally on an upwardly convex surface: as figure 1 and figure 2 As shown, the imaging surface of the object imaging on the object plane Q1 with field curvature is the field curvature imaging surface q1', the imaging surface of the object imaging on the object plane Q2 with field curvature is the field curvature imaging surface q2', and the field curvature imaging surface on the object plane Q3 The imaging surface with field curvature in object imaging is the field curvature imaging surface q3'. In the parallel imaging state, when there is field curvature, the selection of the position of the image detection element should take care of all places on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C11/30
CPCG01C11/30
Inventor 吕伟新张启航
Owner SUZHOU RUINIU ROBOT TECH CO LTD