A lens assembly and a non-invasive arteriosclerosis early warning device

Abstract

This utility model discloses a lens assembly and a non-invasive arteriosclerosis early warning device. The lens assembly includes an optical lens; the optical lens includes a first lens for adjusting optical power, and a second lens and a third lens for co-correcting spherical aberration and coma occurring at the measurement target; the first lens, second lens, and third lens are sequentially arranged along the optical axis of the optical lens from the object side to the imaging plane; the first lens and third lens have positive optical power, and the second lens has negative optical power. The optical lens of the lens assembly in this embodiment adopts a three-element focusing lens structure, which balances imaging performance and cost control, resulting in lower cost and guaranteed measurement accuracy.

Description

Technical Field

[0001] This utility model relates to the field of optical technology, and in particular to a lens assembly and a non-invasive arteriosclerosis early warning device. Background Technology

[0002] Currently, early screening and diagnosis of arteriosclerosis mainly rely on non-invasive blood pressure measurement, ultrasound detection, and pulse wave velocity (PWV) analysis. Traditional non-invasive detection methods (such as cuff blood pressure measurement) have low accuracy in acquiring pulse wave signals, making it difficult to meet the needs of high-resolution vascular elasticity measurement. Ultrasound and other imaging methods are limited by sampling rate and signal processing, making it difficult to achieve high temporal resolution real-time monitoring of arterial hemodynamics.

[0003] In summary, most existing methods require direct contact with the skin and are greatly affected by individual differences (such as skin thickness and blood vessel depth), which may affect measurement stability and repeatability. Furthermore, existing measurement devices are usually large, expensive, difficult to operate, and difficult to measure accurately, making them difficult to popularize in primary healthcare or home testing environments. Utility Model Content

[0004] This invention provides a lens assembly and a non-invasive arteriosclerosis early warning device, which are low in cost and can guarantee measurement accuracy.

[0005] In a first aspect, embodiments of the present invention provide a lens assembly, including: an optical lens;

[0006] The optical lens includes a first lens for adjusting optical power, and a second and a third lens for co-correcting spherical aberration and coma occurring at the measurement target.

[0007] The first lens, the second lens, and the third lens are arranged sequentially along the optical axis of the optical lens from the object side to the imaging plane.

[0008] The first lens and the third lens have positive optical power, and the second lens has negative optical power.

[0009] Optionally, the aberration optimization wavelength of the optical lens is 1550nm.

[0010] Optionally, the first surface of the first lens near the object side is convex, and the radius of curvature of the first surface of the first lens near the object side is 26.818 nm; the second surface of the first lens near the second lens side is concave, and the radius of curvature of the second surface of the first lens near the second lens side is 60.12 nm.

[0011] The first surface of the second lens near the first lens is concave, and the radius of curvature of the first surface of the second lens near the first lens is 34.946 nm. The second surface of the second lens near the third lens is concave, and the radius of curvature of the second surface of the second lens near the third lens is 131.45 nm.

[0012] The first surface of the third lens near the second lens is convex, and the radius of curvature of the third lens near the second lens is 25.617 nm. The second surface of the third lens near the imaging surface is convex, and the radius of curvature of the second surface of the third lens near the imaging surface is 68.47 nm.

[0013] Optionally, the thickness of the spherical cap formed on the first surface of the first lens near the object side is 5 mm, and the thickness of the spherical cap formed on the second surface of the first lens near the second lens side is 2.12 mm.

[0014] The thickness of the spherical cap formed on the first surface of the second lens near the first lens is 6 mm, and the thickness of the spherical cap formed on the second surface of the second lens near the third lens is 2 mm.

[0015] The thickness of the spherical cap formed on the first surface of the third lens near the second lens is 5 mm, and the thickness of the spherical cap formed on the second surface of the third lens near the imaging surface is 24.88 mm.

[0016] Optionally, the first lens, the second lens, and the third lens are all H-K9L glass lenses.

[0017] Optionally, it may also include: a lens holder for adjusting the position of the optical lens;

[0018] The lens bracket includes a bottom fixing clip, a middle folding rod, and an upper lens clip;

[0019] The lens bracket includes a bottom fixing clip for fixing the lens assembly, a middle folding rod for adjusting the position of the optical lens, and an upper lens clip for fixing the optical lens and adjusting the lateral angle of the optical lens.

[0020] The bottom fixing clip is fixedly connected to the first end of the middle folding rod, and the upper lens clip is fixedly connected to the second end of the middle folding rod.

[0021] Optionally, the bottom fixing clamp includes a first clamping plate, a second clamping plate, and fasteners for fixing the distance between the first clamping plate and the second clamping plate;

[0022] An object is clamped and fixed between the first clamp and the second clamp.

[0023] Optionally, the upper lens clip includes a first housing and a second housing;

[0024] Screw holes are provided on both sides of the middle part of the first housing and the second housing;

[0025] The optical lens is fixed to the first housing and the second housing by screws.

[0026] Optionally, the upper lens clip may also include a lateral angle adjustment device;

[0027] The lateral angle adjustment device is fixed on the side of the first housing away from the second housing;

[0028] The lateral angle adjustment device includes a head fixed to one side of the first housing and a tail suspended in the air;

[0029] The rear end of the lateral angle adjustment device is provided with a screw hole;

[0030] The lateral angle adjustment device and the central folding rod are fixed with screws.

[0031] Secondly, this utility model embodiment also provides a non-invasive arteriosclerosis early warning device, including the lens assembly, main unit and fiber optic system described in the first aspect.

[0032] This invention provides a lens assembly and a non-invasive arterial early warning device. The lens assembly includes an optical lens; the optical lens includes a first lens for adjusting optical power, and a second and a third lens for co-correcting spherical aberration and coma occurring at the measurement target; the first, second, and third lenses are sequentially arranged along the optical axis of the optical lens from the object side to the imaging plane; the first and third lenses have positive optical power, and the second lens has negative optical power. The optical lens of the lens assembly of this invention adopts a three-element focusing lens structure, which balances imaging performance and cost control, resulting in lower cost while ensuring measurement accuracy.

[0033] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the structure of an optical lens provided in an embodiment of the present invention;

[0036] Figure 2 This is a schematic diagram of a measurement result provided by an embodiment of the present utility model;

[0037] Figure 3 This is a schematic diagram of another measurement result provided by an embodiment of the present utility model;

[0038] Figure 4 This is a schematic diagram of another measurement result provided by an embodiment of the present utility model;

[0039] Figure 5 This is a schematic diagram of another measurement result provided by an embodiment of the present utility model;

[0040] Figure 6 This is a schematic diagram of the structure of a lens holder provided in an embodiment of the present utility model;

[0041] Figure 7 This is a schematic diagram of the structure of an upper lens clip provided in an embodiment of the present utility model;

[0042] Figure 8 This is a schematic diagram of another upper lens clip provided in this embodiment of the utility model;

[0043] Figure 9 This is a schematic diagram of another measurement result provided by an embodiment of the present utility model;

[0044] Figure 10 This is a schematic diagram of the structure of a non-invasive arteriosclerosis early warning device provided in an embodiment of this utility model. Detailed Implementation

[0045] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0046] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0047] This utility model provides a lens assembly, which includes an optical lens. Figure 1 This is a schematic diagram of the structure of an optical lens provided in an embodiment of this utility model, for reference. Figure 1 The optical lens 100 includes a first lens 110 for adjusting optical power, and a second lens 120 and a third lens 130 for co-correcting spherical aberration and coma occurring at the measurement target. The first lens 110, the second lens 120 and the third lens 130 are arranged sequentially along the optical axis of the optical lens 100 from the object side to the imaging plane. The first lens 110 and the third lens 130 have positive optical power, and the second lens 120 has negative optical power.

[0048] It is understood that the optical lens 100 in this embodiment of the present invention is a laser Doppler vibrometer (LDV) lens, and the laser Doppler vibrometer (LDV) lens has a three-element focusing lens structure, which is designed to balance imaging performance and cost control. The first lens 110 primarily provides the optical power required by the system to achieve effective focusing of the laser beam. The second lens 120 and the third lens 130 work together to correct spherical aberration and coma that may occur at the measurement target, improving imaging quality and measurement accuracy.

[0049] The optical lens 100 of the lens assembly in this embodiment of the present invention adopts a three-element focusing lens structure, which balances imaging performance and cost control in its design, resulting in lower cost and ensuring measurement accuracy.

[0050] Optionally, based on the above embodiments, the aberration optimization wavelength of the optical lens 100 is 1550nm.

[0051] Understandably, the aberration optimization wavelength of the optical lens 100 is 1550nm, which is compatible with the laser wavelength of this system.

[0052] Optionally, based on the above embodiments, the first surface of the first lens 110 near the object side is convex, and the radius of curvature of the first surface of the first lens 110 near the object side is 26.818 nm; the second surface of the first lens 110 near the second lens 120 is concave, and the radius of curvature of the second surface of the first lens 110 near the second lens 120 is 60.12 nm; the first surface of the second lens 120 near the first lens 110 is concave, and the radius of curvature of the first surface of the second lens 120 near the first lens 110 is... The second surface of the second lens 120 near the third lens 130 is concave, and the radius of curvature of the second surface of the second lens 120 near the third lens 130 is 131.45 nm; the first surface of the third lens 130 near the second lens 120 is convex, and the radius of curvature of the third lens 130 near the second lens 120 is 25.617 nm; the second surface of the third lens 130 near the imaging surface is convex, and the radius of curvature of the second surface of the third lens 130 near the imaging surface is 68.47 nm.

[0053] Optionally, based on the above embodiments, the thickness of the spherical cap formed on the first surface of the first lens 110 near the object side is 5 mm, and the thickness of the spherical cap formed on the second surface of the first lens 110 near the second lens 120 is 2.12 mm; the thickness of the spherical cap formed on the first surface of the second lens 120 near the first lens 110 is 6 mm, and the thickness of the spherical cap formed on the second surface of the second lens 120 near the third lens 130 is 2 mm; the thickness of the spherical cap formed on the first surface of the third lens 130 near the second lens 120 is 5 mm, and the thickness of the spherical cap formed on the second surface of the third lens 130 near the imaging plane is 24.88 mm.

[0054] It is understood that the parameters of the first lens 110, the second lens 120 and the third lens 130 provided in this embodiment of the present invention can improve the imaging quality and measurement accuracy of the optical lens 100.

[0055] Optionally, based on the above embodiments, the first lens 110, the second lens 120, and the third lens 130 are all H-K9L glass lenses.

[0056] It is understandable that the first lens 110, the second lens 120, and the third lens 130 are all H-K9L glass lenses in order to effectively control costs while ensuring optical performance.

[0057] Most commercially available PWV measurement devices are cuff-type, requiring significant pressure to be applied to the artery area, which can cause discomfort to the subject. Furthermore, prolonged or repeated measurements within a short period are not possible, and this pressure can have unpredictable effects on the artery, leading to inaccurate results. Optical PWV measurement designs typically employ a handheld structure. The optical output is fixed within a handheld mechanism, with a duckbill-like portion at the front to hold the skin near the artery for stable measurement. This method demands a high level of skill from the operator. Figure 2 This is a schematic diagram of a measurement result provided by an embodiment of the present utility model. Figure 3 This is a schematic diagram of another measurement result provided by an embodiment of the present utility model. Figure 4 This is a schematic diagram of another measurement result provided by an embodiment of the present utility model. Figure 5 This is a schematic diagram of another measurement result provided by an embodiment of the present invention. The result is shown in the diagram, obtained by an untrained operator using a handheld device. Figure 2 As shown, the results were very messy. After a period of training, the measurement results became as follows: Figure 3 As shown, there has been some improvement, but it is still quite messy. The results measured by an experienced operator with three months of training using a handheld device are as follows... Figure 4 and Figure 5 As shown, there is a high degree of uniformity. To obtain accurate measurement results without prior training, this embodiment of the invention also provides a lens holder. Figure 6 This is a schematic diagram of the structure of a lens holder provided in an embodiment of this utility model.

[0058] Optionally, based on the above embodiments, refer to Figure 6 The lens assembly also includes a lens holder 200 for adjusting the position of the optical lens 100; the lens holder 200 includes a bottom fixing clip 210, a middle folding rod 220 and an upper lens clip 230; the lens holder 200 includes a bottom fixing clip 210 for fixing the lens assembly, a middle folding rod 220 for adjusting the position of the optical lens 100, and an upper lens clip 230 for fixing the optical lens 100 and adjusting the lateral angle of the optical lens 100; the bottom fixing clip 210 is fixedly connected to the first end of the middle folding rod 220, and the upper lens clip 230 is fixedly connected to the second end of the middle folding rod 220.

[0059] Understandably, the bottom fixing clip 210 is used to fix the lens bracket 200 to a bed, table, or other location at the measurement site; the middle folding rod 220 is used to flexibly change the position of the optical lens 100 so as to accurately align it with the point being measured; and the upper lens clip 230 can firmly fix the optical lens 100 in place. The middle folding rod 220 is foldable, and the position of the optical lens 100 can be changed by adjusting the degree of folding.

[0060] The lens holder 200 provided in this embodiment of the utility model can be used for measurement without handheld operation, which can ensure the consistency of measurement results, is simple to operate, and can further ensure measurement accuracy.

[0061] Optionally, based on the above embodiments, continue to refer to... Figure 6 The bottom fixing clamp 210 includes a first clamping plate 211, a second clamping plate 212, and a fastener 213 for fixing the distance between the first clamping plate 211 and the second clamping plate 212; the first clamping plate 211 and the second clamping plate 212 clamp and fix an object.

[0062] It should be noted that the distance between the first clamping plate 211 and the second clamping plate 212 is adjustable. In use, first adjust the distance between the first clamping plate 211 and the second clamping plate 212 to clamp and fix the object between them. Then rotate the fastener 213 to fix the distance between the first clamping plate 211 and the second clamping plate 212, thereby fixing the lens bracket 200 to the fixed object. The fixed object can be a bed or a table, etc.

[0063] Figure 7 This is a schematic diagram of the structure of an upper lens clip provided in an embodiment of the present invention. Figure 8 This is a schematic diagram of another upper lens clip provided in an embodiment of the present invention, wherein, Figure 7 and Figure 8 for Figure 6 The diagram shows the structure of the upper lens clip 230 at different angles. Optionally, based on the above embodiment, refer to... Figure 7 and Figure 8 The upper lens clip 230 includes a first housing 231 and a second housing 232; screw holes are provided on both sides of the middle part of the first housing 231 and the second housing 232; the first housing 231 and the second housing 232 use screws to fix the optical lens 100.

[0064] Optionally, based on the above embodiments, continue to refer to... Figure 7 and Figure 8The upper lens clip 230 also includes a lateral angle adjustment device 233; the lateral angle adjustment device 233 is fixed to the side of the first housing 231 away from the second housing 232; the lateral angle adjustment device 233 includes a head fixed to one side of the first housing 231 and a tail suspended in the air; the tail of the lateral angle adjustment device 233 is provided with a screw hole; the lateral angle adjustment device 233 and the middle folding rod 220 are fixed with screws.

[0065] In this embodiment of the invention, the lateral angle adjustment device 233 can also allow the optical lens 100 to swing laterally, increasing the degree of adjustment freedom.

[0066] Figure 9 This is a schematic diagram of another measurement result provided by an embodiment of the present invention. The result of measurement performed by an untrained operator using the lens holder 200 provided by this embodiment of the present invention is as follows. Figure 9 As shown, the uniformity of the measurements easily surpasses that of a skilled operator with three months of experience using existing technologies.

[0067] In summary, the optical lens 100 provided in this embodiment of the present invention adopts a three-element focusing lens structure, which balances imaging performance and cost control in its design. It has a low cost and can ensure measurement accuracy. The lens bracket 200 can be used for measurement without handheld operation, which can ensure the consistency of measurement results. It is simple to operate and can further ensure measurement accuracy.

[0068] Figure 10 This is a schematic diagram of the structure of a non-invasive arteriosclerosis early warning device provided in an embodiment of the utility model, for reference. Figure 10 The non-invasive arteriosclerosis early warning device includes the lens assembly (including optical lens 100 and lens support 200) provided in the above embodiments, the main unit 300 and the fiber optic system 400.

[0069] Specifically, the host unit 300 integrates an infrared laser, a red laser, a silicon photonics chip, a photodetector, a power supply, and control circuitry. Externally, it connects to the host computer 500 via a data cable, is powered by a 12V adapter, and is connected to an optical fiber via an LC adapter. During measurement, the user fixes the optical lens 100 to the top of the lens bracket 200 using the upper lens clip 230, adjusts it above the measurement point (such as the carotid artery or femoral artery), and uses the red laser to indicate the measurement position. After the system starts, optical displacement detection begins.

[0070] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A lens assembly, characterized by, include: Optical lens; The optical lens includes a first lens for adjusting optical power, and a second and a third lens for co-correcting spherical aberration and coma occurring at the measurement target. The first lens, the second lens, and the third lens are arranged sequentially along the optical axis of the optical lens from the object side to the imaging plane. The first lens and the third lens have positive optical power, and the second lens has negative optical power.

2. The lens assembly of claim 1, wherein, The aberration optimization wavelength of the optical lens is 1550nm.

3. The lens assembly according to claim 1, characterized in that, The first surface of the first lens near the object side is convex, and the radius of curvature of the first surface of the first lens near the object side is 26.818 nm. The second surface of the first lens near the second lens side is concave, and the radius of curvature of the second surface of the first lens near the second lens side is 60.12 nm. The first surface of the second lens near the first lens is concave, and the radius of curvature of the first surface of the second lens near the first lens is 34.946 nm. The second surface of the second lens near the third lens is concave, and the radius of curvature of the second surface of the second lens near the third lens is 131.45 nm. The first surface of the third lens near the second lens is convex, and the radius of curvature of the third lens near the second lens is 25.617 nm. The second surface of the third lens near the imaging surface is convex, and the radius of curvature of the second surface of the third lens near the imaging surface is 68.47 nm.

4. The lens assembly according to claim 3, characterized in that, The thickness of the spherical cap formed on the first surface of the first lens near the object side is 5 mm, and the thickness of the spherical cap formed on the second surface of the first lens near the second lens side is 2.12 mm. The thickness of the spherical cap formed on the first surface of the second lens near the first lens is 6 mm, and the thickness of the spherical cap formed on the second surface of the second lens near the third lens is 2 mm. The thickness of the spherical cap formed on the first surface of the third lens near the second lens is 5 mm, and the thickness of the spherical cap formed on the second surface of the third lens near the imaging surface is 24.88 mm.

5. The lens assembly according to claim 3 or 4, characterized in that, The first lens, the second lens, and the third lens are all H-K9L glass lenses.

6. The lens assembly according to claim 1, characterized in that, Also includes: Lens bracket for adjusting the position of the optical lens; The lens bracket includes a bottom fixing clip, a middle folding rod, and an upper lens clip; The lens bracket includes a bottom fixing clip for fixing the lens assembly, a middle folding rod for adjusting the position of the optical lens, and an upper lens clip for fixing the optical lens and adjusting the lateral angle of the optical lens. The bottom fixing clip is fixedly connected to the first end of the middle folding rod, and the upper lens clip is fixedly connected to the second end of the middle folding rod.

7. The lens assembly according to claim 6, characterized in that, The bottom fixing clamp includes a first clamping plate, a second clamping plate, and fasteners for fixing the distance between the first clamping plate and the second clamping plate; An object is clamped and fixed between the first clamp and the second clamp.

8. The lens assembly according to claim 6, characterized in that, The upper lens clip includes a first housing and a second housing; Screw holes are provided on both sides of the middle part of the first housing and the second housing; The optical lens is fixed to the first housing and the second housing by screws.

9. The lens assembly according to claim 8, characterized in that, The upper lens clip also includes a lateral angle adjustment device; The lateral angle adjustment device is fixed on the side of the first housing away from the second housing; The lateral angle adjustment device includes a head fixed to one side of the first housing and a tail suspended in the air; The rear end of the lateral angle adjustment device is provided with a screw hole; The lateral angle adjustment device and the central folding rod are fixed with screws.

10. A non-invasive arteriosclerosis early warning device, characterized in that, Includes the lens assembly, main unit, and fiber optic system as described in any one of claims 1-9.

Images