Sham lens module, linear laser sensor

Abstract

The application provides a Schlieren lens module and a linear laser sensor. The Schlieren lens module comprises a lens assembly and an imaging assembly arranged in sequence; the imaging assembly comprises a photosensitive element CMOS1 and a photosensitive element CMOS2; the photosensitive element CMOS1 and the photosensitive element CMOS2 are arranged on both sides of a lens optical axis of the lens assembly; an imaging surface of the photosensitive element CMOS1 forms an acute angle with the lens optical axis; and an imaging surface of the photosensitive element CMOS2 forms an acute angle with the lens optical axis. In the volume measurement of a regular object, the Schlieren lens module is used, the height of the object is directly imaged on the photosensitive element CMOS1, the width of the object can be reflected by laser line irradiation on the line length of the object, and is also imaged on the photosensitive element CMOS1; the length of the object is imaged on the photosensitive element CMOS2; the measurement error caused by the unstable conveying belt rate due to various reasons is avoided, and the overall volume measurement precision is improved.

Description

Technical Field

[0001] This invention relates to the field of optical system technology, and in particular to SAM lens modules and line laser sensors. Background Technology

[0002] In the 3C industry, logistics industry, and other industries requiring precision measurement, line laser sensors with SAM lens modules are used for non-contact measurement to calculate the volume of target objects. The SAM lens allows for clear imaging of tilted targets across the entire field of view.

[0003] For example, in the process of measuring the volume of parcels on conveyor belts in the logistics industry, a line laser sensor with a SAM lens module can only measure the height and width of a single clear view of the target parcel, but the length cannot be directly measured. The traditional method is to calculate the length of the target parcel by multiplying the conveyor belt speed by the parcel's transit time.

[0004] However, the speed of the conveyor belt is affected by factors such as the material of the transmission belt, the performance of the motor, and the wear at both ends of the shaft, and cannot remain stable. This leads to errors in the measurement of the length of the target package, which in turn results in inaccurate measurement of the volume of the target package. Summary of the Invention

[0005] Therefore, it is necessary to provide a SAM lens module and a line laser sensor that can accurately measure the volume of a target object.

[0006] A phase converter includes: a lens assembly and an imaging assembly arranged sequentially;

[0007] The imaging components include photosensitive element CMOS1 and photosensitive element CMOS2;

[0008] Photosensitive element CMOS1 and photosensitive element CMOS2 are respectively disposed on both sides of the lens optical axis of the lens assembly;

[0009] The imaging surface of the CMOS sensor 1 forms an acute angle with the optical axis of the lens;

[0010] The imaging surface of the CMOS sensor 2 forms an acute angle with the optical axis of the lens.

[0011] In one embodiment, the lens assembly includes:

[0012] The first lens, second lens, third lens, aperture stop, fourth lens, fifth lens, sixth lens, and seventh lens are set in sequence;

[0013] The first lens, the second lens, the fifth lens, the sixth lens, and the seventh lens all have positive optical power;

[0014] Both the third and fourth lenses have negative optical power.

[0015] In one embodiment, the object-side surface of the first lens is convex, and the image-side surface is concave.

[0016] The object-side surface of the second lens is convex, and the image-side surface is concave.

[0017] The object-side surface of the third lens is convex, and the image-side surface is concave.

[0018] Both the object-side and image-side surfaces of the fourth lens are concave.

[0019] The object-side surface of the fifth lens is either concave or convex, while the image-side surface is convex.

[0020] Both the object-side and image-side surfaces of the sixth lens are convex.

[0021] The object-side surface of the seventh lens is convex, and the image-side surface is concave.

[0022] In one embodiment, TTL / IH ≤ 10; where TTL is the distance from the object side to the image plane of the first lens, and IH is the image height of the photosensitive element CMOS1; the image height of the photosensitive element CMOS1 is the same as the image height of the photosensitive element CMOS2.

[0023] 1.61≤f1 / f2≤2.10; where f1 is the focal length of the first lens and f2 is the focal length of the second lens;

[0024] 3.25≤f3 / f4≤4.14; where f3 is the focal length of the third lens and f4 is the focal length of the fourth lens;

[0025] 0.70≤f5 / f≤0.83; where f5 is the focal length of the fifth lens and f is the effective focal length of the lens assembly.

[0026] In one embodiment, 1.19 ≤ φ6 / φ ≤ 1.30; 0.19 ≤ φ7 / φ ≤ 0.41; 0.35 ≤ (φ1 + φ2 + φ3) / φ ≤ 0.53;

[0027] Wherein, φ6 is the optical power of the sixth lens, φ7 is the optical power of the seventh lens, φ1 is the optical power of the first lens, φ2 is the optical power of the second lens, φ3 is the optical power of the third lens, and φ is the optical power of the lens assembly.

[0028] In one embodiment, 1.59≤Nd2≤1.62, 60.30≤Vd2≤68.39; where Nd2 is the refractive index of the second lens and Vd2 is the Abbe number of the second lens;

[0029] 1.88≤Nd7≤2.02, 29.01≤Vd7≤41.01; where Nd7 is the refractive index of the seventh lens and Vd7 is the Abbe number of the seventh lens.

[0030] In one embodiment, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are all spherical mirrors.

[0031] In one embodiment, the SAM lens module includes a filter disposed between the lens assembly and the imaging assembly.

[0032] In one embodiment, the operating wavelength range of the SAM lens module is 587nm to 808nm.

[0033] Secondly, this application provides a line laser sensor, including: a laser, and any of the SAM lens modules provided in the first aspect of this application.

[0034] This application provides a SAM lens module and a line laser sensor. The SAM lens module includes a lens assembly and an imaging assembly arranged sequentially. The imaging assembly includes a CMOS sensor 1 and a CMOS sensor 2. The CMOS sensor 1 and CMOS sensor 2 are respectively disposed on both sides of the optical axis of the lens assembly. The imaging surface of the CMOS sensor 1 forms an acute angle with the optical axis of the lens. The imaging surface of the CMOS sensor 2 also forms an acute angle with the optical axis of the lens. When measuring the volume of a regular object, using this SAM lens module, the height of the object is directly imaged on the CMOS sensor 1, the width of the object is reflected by the line length of the laser beam illuminating the object, and is also imaged on the CMOS sensor 1; the length of the object is imaged on the CMOS sensor 2. This avoids measurement errors introduced by the unstable conveyor belt speed due to various reasons, and improves the overall volume measurement accuracy. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the structure of a Sham lens module according to one embodiment;

[0037] Figure 2 This is a schematic diagram illustrating the imaging principle of a Sham lens module according to one embodiment;

[0038] Figure 3This is a schematic diagram of the structure of a Sham lens module according to one embodiment;

[0039] Figure 4 for Figure 3 A schematic diagram of the optical path of the Sham lens module in the image;

[0040] Figure 5 for Figure 3 MTF imaging quality curves of image sensors CMOS1 and CMOS2 in the Sham lens module;

[0041] Figure 6 for Figure 3 F-tanθ distortion curves of image sensors CMOS1 and CMOS2 in the Sham lens module;

[0042] Figure 7 for Figure 3 The focus shift curve of the Sham lens module in the image;

[0043] Figure 8 This is a schematic diagram of the structure of a Sham lens module according to one embodiment;

[0044] Figure 9 for Figure 8 Optical path diagram of the Sham lens module in the image;

[0045] Figure 10 for Figure 8 MTF imaging quality curve corresponding to the CMOS1 image sensor in the Sham lens module;

[0046] Figure 11 for Figure 8 MTF imaging quality curve corresponding to the CMOS2 image sensor in the Sham lens module;

[0047] Figure 12 for Figure 8 The F-tanθ distortion curve of the CMOS sensor 1 in the Sham lens module;

[0048] Figure 13 for Figure 8 The F-tanθ distortion curve of the CMOS2 image sensor in the Sham lens module;

[0049] Figure 14 for Figure 8 The focus shift curve corresponding to the CMOS sensor 1 in the Sham lens module;

[0050] Figure 15 for Figure 8 The focus shift curve corresponding to the CMOS sensor 2 in the Sham lens module;

[0051] Figure 16 This is a schematic diagram of the structure of a Sham lens module according to one embodiment;

[0052] Figure 17 for Figure 16 Optical path diagram of the Sham lens module in the image;

[0053] Figure 18 for Figure 16 MTF imaging quality curve corresponding to the CMOS1 image sensor in the Sham lens module;

[0054] Figure 19 for Figure 16 MTF imaging quality curve corresponding to the CMOS2 image sensor in the Sham lens module;

[0055] Figure 20 for Figure 16 The F-tanθ distortion curve of the CMOS sensor 1 in the Sham lens module;

[0056] Figure 21 for Figure 16 The F-tanθ distortion curve of the CMOS2 image sensor in the Sham lens module;

[0057] Figure 22 for Figure 16 The focus shift curve corresponding to the CMOS sensor 1 in the Sham lens module;

[0058] Figure 23 for Figure 16 The focus shift curve corresponding to the CMOS sensor 2 in the Sham lens module;

[0059] Figure 24 is a schematic diagram of the structure of a line laser sensor according to an embodiment. Detailed Implementation

[0060] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0061] 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 application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0062] It is understood that the terms "first," "second," etc., used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first lens may be referred to as a second lens, and similarly, a second lens may be referred to as a first lens. Both the first lens and the second lens are lenses, but they are not the same lens.

[0063] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0064] In one embodiment, such as Figure 1 As shown, a SAM lens module is provided, including a lens assembly and an imaging assembly arranged sequentially. The imaging assembly includes a CMOS sensor 1 and a CMOS sensor 2; the CMOS sensor 1 and the CMOS sensor 2 are respectively disposed on opposite sides of the optical axis of the lens assembly; the imaging surface of the CMOS sensor 1 forms an acute angle with the optical axis of the lens; the imaging surface of the CMOS sensor 2 also forms an acute angle with the optical axis of the lens. The tilted arrangement of the CMOS sensor 1 and the CMOS sensor 2 helps to improve the depth of field and its imaging quality.

[0065] like Figure 2 The diagram shows the imaging principle of the SAM lens module. Object plane OB1 is imaged onto image sensor CMOS1 through the lens assembly, and object plane OB2, perpendicular to OB1, is imaged onto image sensor CMOS2 through the lens assembly. AO-A' is the lens optical axis, and D and E are the centers of image sensors CMOS1 and CMOS2, respectively. This off-axis design, deviating from the lens optical axis, reduces the CMOS size and improves space utilization compared to a coaxial structure. CMOS stands for Complementary Metal Oxide Semiconductor, an image sensor.

[0066] According to Scham's Law: .in α Let OB1 be the angle between the object plane and the lens optical axis. α ' is the angle between the first imaging plane (corresponding to CMOS1) and the lens optical axis, where β Let OB2 be the angle between the object plane and the lens optical axis. β' is the angle between the imaging plane CMOS2 and the lens optical axis, and h and h' are the equivalent object distance and image distance of the lens, respectively.

[0067] When measuring the volume of a regular object, such as Figure 2 As shown, OB1 is defined as the height direction of the object, OB2 as the length direction of the object, and the intersection point A of OB1 and OB2, perpendicular to the plane of the paper, is the width direction of the object. Using the SAM lens module provided in this embodiment, the height OB1 of the object can be directly imaged on the photosensitive element CMOS1, and the width of the object can be reflected by the length of the laser line illuminating the object, which is also imaged on the photosensitive element CMOS1; the length OB2 of the object can be measured by imaged on the photosensitive element CMOS2. This avoids measurement errors caused by the unstable conveyor belt speed due to various reasons and improves the overall measurement accuracy.

[0068] Furthermore, the SAM lens module provided in this embodiment can effectively improve the automation level and quality control capability of the production process, and has high practicality and economic value.

[0069] In one embodiment, such as Figure 3 As shown, a lens assembly in a SAM lens module includes: a first lens L1 with positive optical power, a second lens L2 with positive optical power, a third lens L3 with negative optical power, an aperture ST, a fourth lens L4 with negative optical power, a fifth lens L5 with positive optical power, a sixth lens L6 with positive optical power, and a seventh lens L7 with positive optical power, arranged sequentially.

[0070] In one embodiment, a SAM lens module provides a first lens L1 with a convex object-side surface S1 and a concave image-side surface S2; a second lens L2 with a convex object-side surface S3 and a concave image-side surface S4; a third lens L3 with a convex object-side surface S5 and a concave image-side surface S6; a fourth lens L4 with both concave object-side surface S8 and image-side surface S9; a fifth lens L5 with either a concave or convex object-side surface S10 and a convex image-side surface S11; a sixth lens L6 with both convex object-side surface S12 and image-side surface S13; and a seventh lens L7 with a convex object-side surface S14 and a concave image-side surface S15.

[0071] The fourth lens L4 helps to eliminate spherical aberration and field curvature produced by the front group lenses (first lens L1, second lens L2 and third lens L3), the fifth lens L5 helps to eliminate distortion and astigmatism, the sixth lens L6 helps to correct lens distortion, and the seventh lens L7 helps to eliminate field curvature and distortion of the lens.

[0072] In one embodiment, the provided Sham lens module satisfies the following condition:

[0073] TTL / IH≤10; where TTL is the distance from the object side S1 of the first lens L1 to the image plane, and IH is the image height of the photosensitive element CMOS1; the image height of the photosensitive element CMOS1 is the same as that of the photosensitive element CMOS2, that is, the photosensitive elements CMOS1 and CMOS2 have the same size.

[0074] 1.61≤f1 / f2≤2.10; where f1 is the focal length of the first lens L1 and f2 is the focal length of the second lens L2; ​​3.25≤f3 / f4≤4.14; where f3 is the focal length of the third lens L3 and f4 is the focal length of the fourth lens L4; 0.70≤f5 / f≤0.83; where f5 is the focal length of the fifth lens L5 and f is the effective focal length of the lens assembly.

[0075] In one embodiment, the provided Sham lens module satisfies the following condition:

[0076] 1.19≤φ6 / φ≤1.30; where φ6 is the optical power of the sixth lens L6; and φ is the optical power of the lens assembly.

[0077] 0.19≤φ7 / φ≤0.41; where φ7 is the optical power of the seventh lens L7.

[0078] 0.35≤(φ1+φ2+φ3) / φ≤0.53; where φ2 is the optical power of the second lens L2, φ3 is the optical power of the third lens L3, and (φ1+φ2+φ3) / φ is the proportion of optical power distribution of the front group (aperture ST object side) lenses.

[0079] In one embodiment, the provided Sham lens module satisfies the following condition:

[0080] 1.59≤Nd2≤1.62, 60.30≤Vd2≤68.39; where Nd2 is the refractive index of the second lens L2 and Vd2 is the Abbe number of the second lens L2.

[0081] 1.88≤Nd7≤2.02, 29.01≤Vd7≤41.01; where Nd7 is the refractive index of the seventh lens L7 and Vd7 is the Abbe number of the seventh lens L7.

[0082] In one embodiment, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 in the provided Sham lens module are all spherical mirrors.

[0083] In one embodiment, the provided Sham lens module includes a filter G1. The filter G1 is disposed between the lens assembly and the imaging assembly. For example, the filter G1 is disposed between the seventh lens L7 and the imaging assembly.

[0084] In one embodiment, the provided SAM lens module operates in the wavelength range of 587nm to 808nm, covering the near-infrared band.

[0085] In one embodiment, the design parameters of the provided Sham lens module are shown in Table 1.

[0086] Wherein, OBJ represents the object surface, Surface represents the surface number, Radius represents the surface radius of curvature, Thickness represents the thickness, Nd represents the refractive index, and Vd represents the Abbe number. The unit of the above design parameters is millimeters (mm).

[0087] In this embodiment, the structure of the Sham lens module is as follows: Figure 2 As shown. Figure 2 As shown, the object-side surface S10 of the fifth lens L5 in this embodiment is concave. The image plane size of this SAM lens module is F / #=1.8, IH=5.76mm, focal length f=26.26mm, TTL=45mm, TTL / IH=7.81, and the angle between the object plane OB1 and the lens optical axis is... α =45 degrees, the angle between the image sensor CMOS1 and the lens optical axis α =86.97 degrees, lens magnification is =0.05.

[0088] Figure 4 This is the optical path diagram of the Sham lens module provided in this embodiment. Figure 5 This is a graph showing the MTF (Modulation Transfer Function) imaging quality of the SAM lens module provided in this embodiment at image sensor CMOS1 and image sensor CMOS2; from... Figure 5 It can be seen from 105 l At p / mm, the MTF of each field of view is greater than 0.55; Figure 6 This is a graph showing the optical F-tanθ distortion curves of photosensitive elements CMOS1 and CMOS2 in this embodiment; from Figure 6 As can be seen, the distortion of this SAM lens module is less than 0.4% in each field of view. Figure 7 The focal shift curve of the Sham lens module provided in this embodiment.

[0089] Table 1: Design parameters of the Sham lens module provided in this embodiment

[0090]

[0091] In one embodiment, the design parameters of the provided SAM lens module are shown in Table 2. In this embodiment, the structure of the SAM lens module is as follows: Figure 8 As shown. Figure 8 As shown, in this embodiment, the object-side surface S10 of the fifth lens L5 is convex. In this embodiment, the image plane size of the SAM lens module is F / #=1.8, IH=5.76mm, focal length f=30.62mm, TTL=57.55mm, TTL / IH=9.99, and the angle between the object plane OB1 and the lens optical axis is... α =25 degrees, the angle between the image sensor CMOS1 and the lens optical axis α =82.5 degrees, the angle between the optical axis and the object plane OB2 β =65 degrees, the angle between the CMOS sensor 2 and the lens optical axis β =88.35 degrees, lens magnification is =0.06.

[0092] Table 2: Design parameters of the Sham lens module provided in this embodiment

[0093]

[0094] Figure 9 The optical path diagram of the Sham lens module provided in this embodiment. Figure 10 This is the MTF imaging quality curve corresponding to the photosensitive element CMOS1 in this embodiment, at 105 l At p / mm, the MTF of each field of view is greater than 0.55; Figure 11 This is the MTF imaging quality curve corresponding to the photosensitive element CMOS2 in this embodiment, at 105 l At p / mm, the MTF of each field of view is greater than 0.5.

[0095] Figure 12 This is the optical F-tanθ distortion curve corresponding to the photosensitive element CMOS1 in this embodiment. The distortion is less than 0.5% in each field of view. Figure 13 This is the optical F-tanθ distortion curve corresponding to the photosensitive element CMOS2 in this embodiment. The distortion is less than 0.5% in each field of view. Figure 14 This is the focus shift curve corresponding to the photosensitive element CMOS1 in this embodiment; Figure 15 This is the focal shift curve corresponding to the CMOS sensor 2 in this embodiment.

[0096] In one embodiment, the design parameters of the provided Sham lens module are shown in Table 3.

[0097] Table 3: Design parameters of the Sham lens module provided in this embodiment

[0098]

[0099] like Figure 16 The diagram shown is a structural schematic of the Sham lens module provided in this embodiment. Figure 16 As shown, the object-side surface S10 of the fifth lens L5 is convex. In this embodiment, the image plane size of the SAM lens module is F / #=1.8, IH=5.76mm, focal length f=29.35mm, TTL=55.24mm, TTL / IH=9.59, and the angle between the object plane OB1 and the lens optical axis is... α =37 degrees, the angle between the image sensor CMOS1 and the lens optical axis α = 85.58 degrees, the angle between the object plane OB2 and the lens optical axis β =53 degrees, the angle between the CMOS sensor CMOS2 and the lens optical axis β =87.49 degrees, lens magnification is =0.06.

[0100] Figure 17 This is the optical path diagram of the Sham lens module provided in this embodiment; Figure 18 This is the MTF imaging quality curve corresponding to the photosensitive element CMOS1 in this embodiment, at 105 l At p / mm, the MTF of each field of view is greater than 0.6; Figure 19 This is the MTF imaging quality curve corresponding to the photosensitive element CMOS2 in this embodiment, at 105 l At p / mm, the MTF of each field of view is greater than 0.6; Figure 20 This is the optical distortion curve corresponding to the photosensitive element CMOS1 in this embodiment. The distortion is less than 0.45% in each field of view. Figure 21 This is the optical distortion curve corresponding to the photosensitive element CMOS2 in this embodiment. The distortion is less than 0.25% in each field of view. Figure 22 This is the focus shift curve corresponding to the photosensitive element CMOS1 in this embodiment; Figure 23 This is the focal shift curve corresponding to the CMOS sensor 2 in this embodiment.

[0101] In this application, the conditional optical characteristics in the embodiments corresponding to Tables 1, 2 and 3 are summarized to form Table 4.

[0102] Table 4: Summary of conditional optical properties in the embodiments corresponding to Tables 1, 2 and 3

[0103]

[0104] As can be seen from Table 4, the SAM lens module provided in this application can achieve different field of view and measurement accuracy by adjusting the angle between its object plane, image plane and the lens optical axis.

[0105] The Schahm lens module provided in the above embodiments has the characteristics of good imaging quality, low distortion, small chromatic aberration, and small size; it adopts an off-axis dual image plane design, with different image planes sharing a single optical path, which can simultaneously see two object planes in perpendicular directions; it conforms to Schahm's law and has high resolution; the small F-number design increases the amount of light entering the camera and improves measurement accuracy.

[0106] For example, when recognizing patterns or QR codes, a high-brightness light source is usually needed to illuminate the camera, but a high-exposure light source will introduce a lot of stray light. The SAM lens module provided in the above embodiment adopts a large aperture and small F number design to increase the amount of light transmitted, which can reduce the number of high-exposure light sources used or reduce their power, thereby reducing the interference of stray light.

[0107] Based on the same inventive concept, embodiments of this application provide a line laser sensor. For example... Figure 24 As shown, in one embodiment, the line laser sensor includes a laser and any of the Sham lens modules provided in the foregoing embodiments. The line laser sensor can be referred to as a 3D camera.

[0108] The SAM lens module in this embodiment can simultaneously measure two vertical surfaces, which can reduce the number of line laser sensors required in many applications.

[0109] For example, when using the line laser sensor provided in this embodiment for image recognition or QR code recognition in a 3D scene, it can simultaneously measure two surfaces of a regular object, such as... Figure 2 The OB1 and OB2 surfaces shown reduce the number of linear laser sensors in application scenarios, saving costs and improving efficiency.

[0110] For example, when using structured light detection to measure the shape of a target object, if a traditional line laser sensor is used, at least three line laser sensors are required to stitch together the shape of the target object. However, by using the line laser provided in this embodiment, the number of line laser sensors can be reduced, thereby reducing the need for supplementary lighting sources, reducing stray light between lenses, and improving imaging quality.

[0111] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0112] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A SAM lens module, characterized in that, include: The lens assembly and imaging assembly are arranged sequentially; The imaging assembly includes a photosensitive element CMOS1 and a photosensitive element CMOS2; the lens assembly has a total of 7 lenses; The photosensitive element CMOS1 and the photosensitive element CMOS2 are respectively disposed on both sides of the lens optical axis of the lens assembly; The imaging surface of the photosensitive element CMOS1 forms an acute angle with the optical axis of the lens; The imaging surface of the photosensitive element CMOS2 forms an acute angle with the optical axis of the lens; The lens assembly includes: a first lens, a second lens, a third lens, an aperture stop, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged sequentially; the first lens, the second lens, the fifth lens, the sixth lens, and the seventh lens all have positive optical power; the third lens and the fourth lens both have negative optical power. The first lens has a convex object-side surface and a concave image-side surface; the second lens has a convex object-side surface and a concave image-side surface; the third lens has a convex object-side surface and a concave image-side surface; the fourth lens has both a concave object-side surface and a concave image-side surface; the fifth lens has either a concave or convex object-side surface and a convex image-side surface; the sixth lens has both a convex object-side surface and a convex image-side surface; and the seventh lens has a convex object-side surface and a concave image-side surface. TTL / IH ≤ 10; where TTL is the distance from the object side to the image plane of the first lens, and IH is the image height of the CMOS sensor 1; the image height of the CMOS sensor 1 is the same as that of the CMOS sensor 2; 1.61 ≤ f1 / f2 ≤ 2.10; where f1 is the focal length of the first lens, and f2 is the focal length of the second lens; 3.25 ≤ f3 / f4 ≤ 4.14; where f3 is the focal length of the third lens, and f4 is the focal length of the fourth lens; 0.70≤f5 / f≤0.83; where f5 is the focal length of the fifth lens and f is the effective focal length of the lens assembly.

2. The Sham lens module according to claim 1, characterized in that, 1.19≤φ6 / φ≤1.30; 0.19≤φ7 / φ≤0.41; 0.35≤(φ1+φ2+φ3) / φ≤0.53; Wherein, φ6 is the optical power of the sixth lens, φ7 is the optical power of the seventh lens, φ1 is the optical power of the first lens, φ2 is the optical power of the second lens, φ3 is the optical power of the third lens, and φ is the optical power of the lens assembly.

3. The Sham lens module according to claim 1, characterized in that, 1.59≤Nd2≤1.62, 60.30≤Vd2≤68.39; where Nd2 is the refractive index of the second lens and Vd2 is the Abbe number of the second lens; 1.88≤Nd7≤2.02, 29.01≤Vd7≤41.01; where Nd7 is the refractive index of the seventh lens and Vd7 is the Abbe number of the seventh lens.

4. The Sham lens module according to any one of claims 1-3, characterized in that, The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are all spherical mirrors.

5. The Sham lens module according to any one of claims 1-3, characterized in that, The Sham lens module includes: a filter; The filter is disposed between the lens assembly and the imaging assembly.

6. The Sham lens module according to claim 1, characterized in that, The operating wavelength range of the SAM lens module is 587nm to 808nm.

7. A line laser sensor, characterized in that, include: A laser, and a SAM lens module as described in any one of claims 1-6.

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