A wide-angle illumination fiber for ophthalmic surgery
By designing a frustum-shaped structure at the end of the optical fiber in ophthalmic surgery and protecting it with a stainless steel needle tube, the problem of the small emission angle of traditional optical fibers was solved, enabling wide-angle illumination and improving the safety and efficiency of surgery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANJING CHUNHUI SCI & TECH IND
- Filing Date
- 2025-07-03
- Publication Date
- 2026-06-30
AI Technical Summary
Traditional ophthalmic lighting uses fiber optic cables with a small emission angle, resulting in a narrow illumination range during surgery. This necessitates multiple adjustments to the position, reducing the safety of the procedure.
A wide-angle illumination optical fiber is designed. By setting a frustum-shaped structure and a stainless steel needle tube for protection at the end of the fiber, the emission angle is increased. The components are then bonded and fixed with adhesive to ensure the stability and accuracy of the optical fiber.
It achieves a wide beam diffusion angle of over 100°, enhancing the surgical field of vision, reducing blind spots in lesion tissue illumination, and improving the safety and efficiency of surgery.
Smart Images
Figure CN224434220U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of optical fiber lighting technology, specifically to a wide-angle optical fiber for ophthalmic surgery. Background Technology
[0002] Efficient intraocular illumination is crucial for the success of diagnosis and surgery. Optical fiber optic lighting, as an advanced lighting solution, is increasingly becoming a key component of ophthalmic surgery. It provides ophthalmologists with clear, bright, and controllable lighting conditions, helping to improve surgical accuracy and safety, and enhancing patient outcomes.
[0003] Traditional illumination fibers have an emission angle of less than 80°. With the gradual advancement of minimally invasive ophthalmic surgery, the emission end has evolved from 20G to 23G, 25G, or even smaller 27G. The diameter of the corresponding illumination fiber has also been continuously reduced, resulting in a narrower intraocular illumination range during surgery. In order to ensure that the beam is guided to the required position throughout the ophthalmic surgery, the surgeon may need to adjust the position of the illumination fiber multiple times, which reduces the safety of the surgical procedure. Utility Model Content
[0004] To address the aforementioned problems, this invention provides a wide-angle illumination optical fiber for ophthalmic surgery.
[0005] The technical solution adopted in this utility model is:
[0006] A wide-angle illumination fiber for ophthalmic surgery includes an optical cable, a connector, a handle, and a stainless steel needle tube. The front end of the optical cable is connected to the connector, and the rear end is connected to the handle and the stainless steel needle tube. The front end of the stainless steel needle tube is located inside the handle. The optical cable includes an optical fiber and a coating layer. The end of the optical fiber extends from the coating layer and the rear side of the handle to form an insertion part. The insertion part is completely fitted inside the stainless steel needle tube, and the end of the insertion part radially contracts inward to form a frustum shape.
[0007] Furthermore, the small end face of the frustum is flush with the end face of the stainless steel needle tube.
[0008] Furthermore, the taper of the frustum is 20–45°.
[0009] Furthermore, an annular gap is provided between the optical fiber and the coating layer, and the front end of the stainless steel needle extends into the annular gap and is bonded to the optical fiber by an adhesive.
[0010] Furthermore, a stepped through hole is provided inside the handle. The large hole diameter is adapted to the outer diameter of the optical cable, and the small hole diameter is adapted to the outer diameter of the stainless steel needle tube. The handle and the optical cable are bonded together with adhesive and inserted into the stainless steel needle tube.
[0011] Furthermore, the connector is cured onto the front end of the optical cable with adhesive. The front end face of the connector is flat and flush with the front end face of the optical fiber.
[0012] Furthermore, the diameter of optical fiber is 250–1000 micrometers, and the diameter of optical cable is 1000–2500 micrometers.
[0013] Furthermore, the numerical aperture of the optical fiber filament is 0.45 to 0.75.
[0014] The beneficial effects of this utility model are:
[0015] The illumination fiber of this application has a wide beam diffusion angle, while the output of light flux is no different from that of traditional optical fibers. This greatly enhances the illumination range inside the eye during ophthalmic surgery, increases the surgical field of view, reduces the blind spot of diseased tissue, and improves the safety of the surgery. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of the wide-angle illumination optical fiber for ophthalmic surgery in this application.
[0017] Figure 2 This is a cross-sectional structural diagram of an optical cable.
[0018] Figure 3 for Figure 1 A schematic diagram of the longitudinal section.
[0019] Figure 4 for Figure 3 A magnified view of part A.
[0020] Figure 5 for Figure 3 A magnified view of section B.
[0021] Figure 6 This is a schematic diagram of the reflection principle of the wide-angle illumination optical fiber for ophthalmic surgery in this application. Detailed Implementation
[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with the accompanying drawings and preferred embodiments.
[0023] See Figure 1-5 This application provides a wide-angle illumination optical fiber for ophthalmic surgery, comprising an optical cable 3, a connector 4, a handle 2, and a stainless steel needle tube 1; the front end of the optical cable 3 is connected to the connector 4, and the rear end is connected to the handle 2 and the stainless steel needle tube 1.
[0024] The optical cable 3 consists of an optical fiber 31 and a coating layer 32. The coating layer 32 completely covers the outside of the optical fiber 31 to protect it from physical damage. An annular gap is provided between the coating layer 32 and the optical fiber 31. This annular gap ensures that when the optical fiber is stretched by external force, only the outer coating layer is stretched, protecting the optical fiber from damage and thus ensuring that the optical fiber's optical efficiency is not affected. The coating material can be plastics such as PVC, PE, or nylon.
[0025] The optical fiber 31 consists of a core 311 and a cladding 312. The cladding 312 completely covers the core 311 and confines the light beam within the core 311 for propagation. In specific implementations, the optical fiber diameter is preferably between 250 and 1000 micrometers, compatible with existing 23G-27G standard equipment. The optical cable diameter is preferably between 1000 and 2500 micrometers; the numerical aperture of the optical fiber is in the range of 0.45 to 0.75.
[0026] Connector 4 is cured to the front end of optical cable 3 with adhesive. The front end face of connector 4 is flat and flush with the front end face of optical fiber 31. The flat front end face of connector 4 ensures stable coupling efficiency of the optical signal during transmission, reducing light loss or reflection caused by tilted or uneven end faces. The flush front ends of optical fiber 31 and connector 4 prevent optical path misalignment, improving the transmission quality of the optical signal. After the adhesive cures, connector 4 and optical cable 3 form a unified whole, ensuring a fast and stable connection with light sources (such as LED, xenon, or halogen lamps), thereby guaranteeing optical coupling efficiency and improving beam quality.
[0027] In practice, a stepped through-hole is provided inside the connector 4. The large diameter of the stepped through-hole is adapted to the outer diameter of the optical cable 3, and the small diameter is adapted to the diameter of the optical fiber 31. The front end of the optical cable passes through the stepped through-hole of the connector 4. The coating layer 32 is located in the large hole of the stepped through-hole and is connected to the connector 4 by adhesive. The front end of the optical fiber 31 passes through the coating layer 32 and extends to the front end of the small hole of the stepped through-hole, and is connected to the connector 4 by adhesive.
[0028] See Figure 4 The end of the optical cable 3 is fitted with a handle 2, and the end of the optical fiber 31 extends from the rear of the handle 2 to form an insertion part. The end of the insertion part tapers radially inward to form a frustum shape. The handle 2 provides a stable grip, facilitating precise control by the surgeon during ophthalmic surgery, allowing the insertion part to illuminate intraocular lesions.
[0029] A stainless steel needle tube 1 is fitted over the outer surface of the fiber optic insertion section. The end face of the stainless steel needle tube 1 is flush with the end face of the fiber optic cable 31 to prevent the protrusion from accidentally contacting intraocular tissue. The front end of the stainless steel needle tube 1 extends into the handle 2 and is inserted into the annular gap between the coating layer 32 and the fiber optic cable 31. The stainless steel needle tube 1 encasing the fiber optic cable 31 insertion section significantly improves the fiber strength, enabling the beam emitted from the insertion section to stably and accurately illuminate intraocular lesions. The insertion of the front end of the stainless steel needle tube 1 into the annular gap between the coating layer 32 and the fiber optic cable 31 ensures that the fiber optic cable 31 remains axially aligned during insertion, restricts the fiber's range of motion, reduces wear, and protects the fiber's optical efficiency.
[0030] The stainless steel needle tube 1 can be bonded to the optical fiber 31 with adhesive. In a specific implementation, a stepped through hole can be provided in the handle 2. The large hole diameter is adapted to the outer diameter of the optical cable, and the small hole diameter is adapted to the outer diameter of the stainless steel needle tube. The handle 2 is bonded to the optical cable with adhesive and inserted into the stainless steel needle tube and bonded with adhesive.
[0031] See Figure 5 and Figure 6 The end of fiber 31 is configured as a frustum, with a taper of 20–45°. When the beam is input from the large end of the fiber's tapered section, the divergence angle of the emitted light at the small end will increase. At this time, the emission angle θ2 of the emitted beam is larger than the incident angle θ1 of the incident beam. The emission angle θ2 and the incident angle θ1 satisfy the following equation 1.
[0032] D1*sinθ1=D2*sinθ2(1).
[0033] Where D2 is the diameter of the large end of the fiber frustum, D1 is the diameter of the small end of the fiber frustum, θ2 is the exit angle, and θ1 is the incident angle.
[0034] The above structure allows the wide-angle illumination fiber to have a wide beam diffusion angle of over 100°, while the output of light flux is no different from that of traditional optical fibers. This greatly enhances the illumination range inside the eye during ophthalmic surgery, increases the surgical field of view, reduces the blind spot of diseased tissue, and improves the safety of the surgery.
[0035] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications are also within the protection scope of the present utility model.
Claims
1. A wide-angle illumination optical fiber for ophthalmic surgery, characterized in that, It includes an optical cable (3), a connector (4), a handle (2), and a stainless steel needle tube (1); the front end of the optical cable (3) is connected to the connector (4), and the rear end is connected to the handle (2) and the stainless steel needle tube (1), with the front end of the stainless steel needle tube (1) located inside the handle (2); the optical cable (3) includes an optical fiber (31) and a coating layer (32), with the end of the optical fiber (31) extending from the rear side of the coating layer (32) and the handle (2) to form an insertion part; the insertion part is completely fitted inside the stainless steel needle tube (1), and the end of the insertion part radially contracts inward to form a frustum shape.
2. The wide-angle illumination optical fiber for ophthalmic surgery according to claim 1, characterized in that, The small end face of the frustum is flush with the end face of the stainless steel needle tube.
3. The wide-angle illumination optical fiber for ophthalmic surgery according to claim 1, characterized in that, The taper of the frustum is 20–45°.
4. The wide-angle illumination optical fiber for ophthalmic surgery according to claim 1, characterized in that, An annular gap is provided between the optical fiber (31) and the coating layer (32), and the front end of the stainless steel needle tube (1) extends into the annular gap and is bonded to the optical fiber (31) by an adhesive.
5. The wide-angle illumination optical fiber for ophthalmic surgery according to claim 1, characterized in that, The handle (2) is provided with stepped through holes. The large hole diameter is adapted to the outer diameter of the optical cable, and the small hole diameter is adapted to the outer diameter of the stainless steel needle tube. The handle (2) and the optical cable (3) are bonded together with adhesive and inserted into the stainless steel needle tube (1).
6. The wide-angle illumination optical fiber for ophthalmic surgery according to claim 1, characterized in that, The connector (4) is fixed to the front end of the optical cable (3) by adhesive. The front end face of the connector (4) is flat and flush with the front end face of the optical fiber (31).
7. The wide-angle illumination optical fiber for ophthalmic surgery according to claim 1, characterized in that, The diameter of the optical fiber (31) is 250 to 1000 micrometers, and the diameter of the optical cable (3) is 1000 to 2500 micrometers.
8. The wide-angle illumination optical fiber for ophthalmic surgery according to claim 1, characterized in that, The numerical aperture of the fiber filament of the optical fiber (31) is 0.45 to 0.75.