Light beam guiding and homogenizing connection

Abstract

The utility model relates to medical instrument technical field discloses a kind of light beam guiding uniform light connecting pieces, including connecting seat, are provided with cavity structure, one end is equipped with light source entrance, the other end is equipped with light source exit;Light beam guiding, with light source entrance detachable connection, for guiding light source to enter connecting seat inside;Collimating mirror, setting is in the front side of connecting seat inner chamber, the light source that enters into connecting seat is adjusted to contract divergence angle and forms collimating light;Uniform light mirror, setting is in the rear side of connecting seat inner chamber, with collimating mirror interval setting in the rear side of collimating mirror, collimating light that is emitted by compression mirror group is converted into homogenization light and is emitted to the irradiation area to be illuminated;Edge cover, setting is at light source exit and uniform light mirror outside edge abutting fixed. Solve the problem that endoscope bayonet adapter imaging is tested, because light beam guiding single illumination exists light unevenness, local bright spot or dark area and the misjudgment of adapter lens uniformity.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a beam guide and light homogenizing connector. Background Technology

[0002] The initial light source in the beam guide is often a white LED or a laser, which have Lambertian and Gaussian distributions, respectively. That is, the beam guide outlet is untreated, the beam has a fixed divergence angle, such as a Gaussian distribution with a divergence angle of about 70°, the energy in the central region is higher than that in the edge region, and the illuminance of the irradiated area cannot be uniformly distributed.

[0003] Current medical endoscopes all transmit light through a single beam. The single beam design is used to connect to the front rigid endoscope to provide illumination when the endoscope is in use. For example, CN219594538U discloses a medical beam guide connection component.

[0004] However, when testing the imaging effect of the endoscope mount adapter, the front rigid endoscope is not connected, and only the beam can be used for illumination. Therefore, due to the LED and laser transmission characteristics of the light source, there may be one or more of the following defects:

[0005] 1. Uneven light intensity distribution leads to distorted test data: The center of the light spot is bright, while the edges are dark. During adapter testing, the signal-to-noise ratio (SNR) in the edge region decreases, which may be misjudged as insufficient equipment sensitivity or substandard optical performance. This introduces systematic errors in tests with stringent uniformity requirements (such as fluorescence imaging efficiency and narrowband NBI contrast ratio).

[0006] 2. Evaluation of Overexposure Interference Parameters in the Center: Excessive light intensity in the center area may cause local saturation of the camera, which may mask the true performance when testing the dynamic range of imaging (such as loss of details in overexposed areas); the automatic exposure algorithm may make incorrect adjustments due to uneven light spots, affecting test results such as white balance and color reproduction.

[0007] 3. Dark areas at the edges can mask defects or reduce detection sensitivity: Blurred imaging or increased noise at the edges of the adapter can lead to misjudgments of lens or sensor defects in resolution tests (such as line-to-line tests). Tiny structures (such as mucosal blood vessels or industrial cracks) are difficult to identify in dark areas, resulting in a higher false negative rate. Utility Model Content

[0008] To address the shortcomings of existing technologies, this utility model provides a beam guide and uniform light connector that enables a more uniform distribution of light intensity output from the beam guide, reduces local bright spots or dark areas, improves the uniformity of the light source, and ensures consistent brightness in the irradiated area. This reduces the problem of misjudgment of poor lens uniformity caused by the non-uniformity of the light source. At the same time, it can also disrupt the spatial coherence of the laser, suppress speckle noise, and reduce the impact on the image.

[0009] To achieve the above objectives, this application adopts the following technical solution:

[0010] This utility model is a beam guiding and light homogenizing connector, including a connector base, which is configured as a cavity structure, with a light source inlet at one end and a light source outlet at the other end.

[0011] The beam guide is detachably connected to the light source entrance and is used to guide the light source into the connector.

[0012] A collimating lens is installed on the front side of the inner cavity of the connector to adjust the divergence angle of the light source incident into the connector to form collimated light;

[0013] The homogenizing mirror is located on the rear side of the inner cavity of the connecting seat and is positioned on the rear side of the collimating mirror through a spacer ring. It converts the collimated light emitted from the compression mirror group into homogenized light and emits it to the area to be irradiated.

[0014] The edge cap is fixed at the light source outlet and abuts against the outer edge of the homogenizing mirror.

[0015] A further improvement is that the light source inlet, collimating lens, homogenizing lens, and light source outlet are coaxially arranged.

[0016] A further improvement is that the homogenizing mirror is designed as a compound eye lens.

[0017] A further improvement is that the collimating lens is set as a biconvex lens.

[0018] A further improvement is that: two collimating lenses of the same specifications are provided, and the two collimating lenses are arranged side by side at a fixed interval through a partition ring, and one of the collimating lenses abuts against the limiting protrusion provided in the connecting seat.

[0019] A further improvement is that the thickness of the partition ring is less than that of the spacer ring.

[0020] A further improvement is that the light source entrance is provided with an internal thread that is compatible with the beam guide.

[0021] A further improvement is that the rear side of the connecting seat is provided with a columnar cavity structure, and the front side of the connecting seat, the position between the light source inlet and the limiting boss, is provided with a conical cavity structure that communicates with the columnar cavity structure.

[0022] Compared with the prior art, the advantages of this utility model are:

[0023] This application incorporates a collimating lens and a homogenizing lens within the connector to reduce the divergence angle of the light source entering the beam, achieving near-collimation. The beam is then homogenized by the homogenizing lens, resulting in a more uniform light intensity distribution from the beam, reducing local bright spots or dark areas and minimizing false detections. In the detection of adapter lens uniformity, the beam source needs to illuminate a portion of the area, and the lens is used to observe that area. The non-uniformity of the unprocessed light source can lead to false judgments about lens uniformity. Adding this device improves the uniformity of the light source, ensuring consistent brightness across the illuminated area, reducing false judgments of poor lens uniformity due to light source non-uniformity, and enhancing the reliability and sensitivity of the detection data.

[0024] Meanwhile, the homogenized emitted light also destroys the coherence of the laser source. Untreated laser light irradiation is very likely to cause laser interference effect, resulting in interference fringes on the image. Using the connector of this application can destroy the spatial coherence of the laser and suppress speckle noise, thereby reducing the impact on the image. Attached Figure Description

[0025] Figure 1 This is a cross-sectional structural diagram of the present invention.

[0026] Figure 2 This is a schematic diagram of the optical path transmission of one embodiment of the present invention.

[0027] Figure 3 This is a schematic diagram of the optical path adjustment and homogenization principle of this utility model.

[0028] Attached image labels:

[0029] Connector 1; Light source inlet 11; Conical cavity structure 12; Limiting boss 13; Baffle ring 14; Spacer ring 15; Light source outlet 16; Beam guide 2; Collimating lens 3; Edge cover 4; Beam homogenizer 5; Area to be irradiated 6. Detailed Implementation

[0030] To enhance understanding of this utility model, it will be further described in detail below with reference to the accompanying drawings. This embodiment is only used to explain this utility model and does not constitute a limitation on the scope of protection of this utility model.

[0031] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the combination or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0033] Figure 1-3 The diagram shows a beam guide and homogenizing connector, comprising a connector 1, which is a cavity structure with a light source inlet 11 at one end and a light source outlet 16 at the other end; a beam guide 2, detachably connected to the light source inlet 11, used to guide the light source into the connector 1; a collimating lens 3, located on the front side of the cavity of the connector 1, which adjusts the divergence angle of the light source incident into the connector 1 to form collimated light; a homogenizing lens 5, located on the rear side of the cavity of the connector 1, and spaced apart from the collimating lens 3 by a spacer 15, which converts the collimated light emitted through the compression lens assembly into homogenized light and emits it to the area to be irradiated 6; and a pressure cover 4, located at the light source outlet 16 and abutting against the outer edge of the homogenizing lens 5 for fixation; the light source inlet 11, the collimating lens 3, the homogenizing lens 5, and the light source outlet 16 are coaxially arranged; the homogenizing lens 5 is a compound eye lens; and the collimating lens 3 is a biconvex lens.

[0034] This application establishes a cavity-structured connector 1 detachably connected to the beam guide 2. Within the connector 1, a collimating lens 3 and a homogenizing lens 5 are sequentially arranged at predetermined intervals, and the collimating lens 3 and homogenizing lens 5 are sealed to form an integrated structure with a light source inlet 11 and a light source outlet 16. The light source enters the collimating lens 3 within the cavity of the connector 1 via the beam guide 2. The collimating lens 3 contracts and adjusts the divergence angle, approximating a collimated beam propagation. The beam then passes through the homogenizing lens 5 to form the desired homogenized beam for irradiating the area 6 to be irradiated. This results in a more uniform distribution of output light intensity, reducing local bright spots or dark areas, improving light source uniformity, and ensuring consistent brightness across the irradiated area. It also reduces misjudgments due to poor lens uniformity caused by light source inhomogeneity, improving the reliability and sensitivity of detection data. Furthermore, it disrupts the spatial coherence of the laser, suppresses speckle noise, and reduces its impact on the image.

[0035] An alternative implementation, such as Figure 1-3 As shown, there are two collimating lenses 3 in the connecting seat 1 with the same specifications. The two collimating lenses 3 are arranged side by side with a fixed distance between them through the partition ring 14. One collimating lens 3 abuts against the limiting boss 13 in the connecting seat 1. A light-diffusing lens 5 is arranged in the inner cavity of the connecting seat 1 with the next collimating lens 3 through the spacer ring 15. A pressure cover 4 adapted to the inner cavity is set on the back side of the light-diffusing lens 5 in the inner cavity to fix and seal the two collimating lenses 3 with the light-diffusing lens 5. The thickness of the partition ring 14 is less than that of the spacer ring 15. The thickness of the partition ring 14 and the spacer ring 15 is customized according to the requirements.

[0036] Specific: such as Figure 2As shown, collimating lens 31 and collimating lens 32 have the same specifications, and are biconvex lenses with a diameter of D=25.4mm and a focal length of F=60mm; the homogenizing lens 5 is a compound eye lens with a diameter of D=25.4mm, a unit curvature of 25°×25°, and a unit size of 2×2mm.

[0037] The collimating lens 31 is installed on the rear side of the limiting boss 13 in the connecting seat 1, with a distance of 30mm from the exit end of the beam guide 2. The collimating lens 32 is then installed separately with a partition ring 14, and the distance between the two collimating lenses is 2mm. Then, the homogenizing lens 5 is installed separately with a spacer ring 15, and the distance between the homogenizing lens 5 and the collimating lens 32 is 30mm. Finally, the entire system is locked with the edge cover 4 to ensure that the beam of light uniformly covers the sample in the area to be irradiated 6.

[0038] Among them: the compound eye lens setting is based on the distance between the sample in the irradiated area 6 and the light output port of the guide beam, and the actual required divergence angle is calculated. The curvature of the compound eye lens is customized to achieve the required divergence angle of the beam after homogenization. In this embodiment, when the beam is emitted from the light output port of the guide beam 2 as a Gaussian distributed diverging beam, it is converted into a collimated beam after passing through the collimating lens 31 and collimating lens 32. Then, after passing through the compound eye lens, a beam with a diffusion angle of 25° reaches the surface to be irradiated. At this time, the beam has a certain homogenization effect, the illuminance is relatively uniform and covers the entire irradiated area 6, so as to complete various tests.

[0039] Alternatively, the distance between collimating lens 31 and collimating lens 32 can be set to 1mm, and the distance between homogenizing lens 5 and collimating lens 32 can be 10mm to form a homogenized beam with a required diffusion angle of another specification. Alternatively, a homogenized beam with the required diffusion angle can be achieved by setting collimating lenses and homogenizing lenses 5 of different specifications and the distance between them.

[0040] In one optional implementation, the light source inlet 11 is provided with a connecting internal thread adapted to the guide beam 2; the light source inlet 11, which can be connected to the guide beam, facilitates the uniform beam full coverage of the sample when performing various image tests that require light source illumination.

[0041] In one optional embodiment, the rear side of the connecting seat 1 is provided with a columnar cavity structure, and the front side of the connecting seat 1, between the light source inlet 11 and the limiting boss 13, is provided with a conical cavity structure 12 that communicates with the columnar cavity structure.

[0042] This application achieves collimation first, followed by homogenization; it first reduces the divergence angle of the light source to approximate collimation, and then designs corresponding homogenization lenses according to the required illumination area area and distance; the illumination area has uniform brightness, reducing detection misjudgment; and it destroys the spatial coherence of the laser to suppress speckle noise.

[0043] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A beam guiding and homogenizing connector, characterized in that: include The connecting seat (1) is designed as a cavity structure, with a light source inlet (11) at one end and a light source outlet (16) at the other end. The beam guide (2) is detachably connected to the light source inlet (11) and is used to guide the light source into the connector (1); Collimating lens (3) is set on the front side of the inner cavity of the connecting seat (1) to adjust the divergence angle of the light source incident into the connecting seat (1) to form collimated light; The homogenizing mirror (5) is located on the rear side of the inner cavity of the connecting seat (1) and is spaced apart from the collimating mirror (3) by a spacer (15) on the rear side of the collimating mirror (3). It converts the collimated light emitted from the compression mirror group into homogenized light and emits it to the area to be irradiated (6). The edge cover (4) is set at the light source outlet (16) and fixed to the outer edge of the uniform mirror (5).

2. The beam guiding and homogenizing connector according to claim 1, characterized in that: The light source inlet (11), collimating lens (3), homogenizing lens (5) and light source outlet (16) are coaxially arranged.

3. The beam guiding and homogenizing connector according to claim 1, characterized in that: The homogenizing mirror (5) is configured as a compound eye lens.

4. The beam guiding and homogenizing connector according to claim 1, characterized in that: The collimating lens (3) is configured as a biconvex lens.

5. The beam guiding and homogenizing connector according to claim 4, characterized in that: The collimating lens (3) is set in two identical parts. The two collimating lenses (3) are arranged side by side at a fixed interval through a partition ring (14). One of the collimating lenses (3) abuts against the limiting boss (13) inside the connecting seat (1).

6. The beam guiding and homogenizing connector according to claim 5, characterized in that: The thickness of the partition ring (14) is less than that of the partition ring (15).

7. The beam guiding and homogenizing connector according to claim 1, characterized in that: The light source inlet (11) is provided with an internal thread that is compatible with the beam guide (2).

8. The beam guiding and homogenizing connector according to any one of claims 1-7, characterized in that: The rear side of the connecting seat (1) is provided with a columnar cavity structure, and the front side of the connecting seat (1), between the light source inlet (11) and the limiting boss (13) is provided with a conical cavity structure (12) that communicates with the columnar cavity structure.

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