CN2253958Y - Side emission fibre-optic scalpel with improved general interface - Google Patents

Abstract

The utility model relates to a side emission optical fiber scalpel with an improved general interface, which is matched with a laser medical treatment device. The utility model mainly comprises a silica optical fiber with a length of a plurality of meters, a core stem of the silica optical fiber is exposed from both ends of the silica optical fiber, the end surface of the core stem at one end is a circular optical surface, a foldable optical fiber plug is plugged into the end with a circular optical surface, the foldable optical fiber plug is matched with an optical fiber socket on a laser medical treatment device, the other end of the optical fiber plug corresponding to the circular optical surface is provided with an elastic optical fiber clamping head and a tightening screw nut, the end surface of the core stem at the other end of the silica optical fiber is an elliptical optical surface, and an outer cover and a sealing layer of the elliptical optical surface are coated with a protecting layer and a reinforced layer. The utility model has the advantages that the optical fiber plug can be disassembled and used for many times, the outer cover is provided with an anticorrosion protecting layer and can not drop off easily, and the service life of the optical fiber scalpel is extended.

Description

Improve the side emission type optical tool bit of general-purpose interface

This utility model relates to the side emission type optical tool bit of a kind of improvement general-purpose interface (SMA) of medical YAG laser therapeutic apparatus leaded light treatment accessory.

Prior art, YAG Lasar prostate therapeutic instrument are a kind of ideal modern medical service equipment for the treatment of the prostate hyperplasia illness of need not operating at present, need to be equipped with special-purpose SMA side emission type optical tool bit and enter the body cavity internal therapy via cystoscope.Optical tool bit at present commonly used is as the UNITECK side emission type optical tool bit of German CERAMOPTEE Inc and U.S. Uniteck Global Ind; all be that silica fibre one end is worn into optical surface and packed in the contact pin of the international fibre-optical splice of SMA905; so that tap on the laser therapeutic apparatus; the other end is partly peeled off silica core behind the fibre cladding and is worn into the plane and cut off cylindrical so; the quartzy capillary sleeve pipe of overcoat with cut off the air space that face forms sealing, with laser in the protection optical fiber after cutting off the face total internal reflection from the bright dipping of optical fiber side.

Tightening up the sub-miniature A connector end optical fiber and being connected of contact pin spare of above-mentioned prior art is by the needle cannula distortion of extruding optical fiber extrapolation or with the bonding realization of bonding agent, can only disposablely use; And optical tool bit end capillary quartz ampoule cover comes off automatically sometimes or is containing NaCl, H ₂Corroded easily in the liquid working environment such as O, hair appears becoming in exiting surface, loses transparent and the life-span termination optical tool bit to light.

The purpose of this utility model is the weak point at above-mentioned prior art, proposes a kind of improved novel side emission type optical tool bit, so that the service life of extended fiber cutter head.

Optical tool bit of the present utility model mainly comprises: the silica fibre 7 of long number rice, after the fibre cladding 14 and coating 15 of certain-length peeled off at two ends respectively, the stem stem end face of one end is worn into and the vertical circular optical surface 1 of fiber axis, in the removable general-purpose interface Optical fiber plug 17 (containing 2-6) that fiber-optical socket is complementary on insertion and the laser medicine instrument, it is oval optical surface 12 that the other end of stem stem cuts off quartzy stem stem end face, constitutes the other cutter head of penetrating with cutter head assembly 16 (comprising 8-13).Joint contact pin 2 and contact pin in the removable Optical fiber plug 17 (2-6) tighten up nut 3, manufacture by standard, therebetween with 4 movable connections of elastic ring, the outer cylinder away from an end of the circular optical surface 1 of optical fiber of contact pin 2, vertically slot along sidewall, become elasticity Fibre cartridge for optical connector 5, after optical fiber inserts, tighten up nut 6 by optical fiber and screw in the screw thread of elasticity Fibre cartridge for optical connector 5 and optical fiber 7 and contact pin 2 are fixed together.

The oval optical surface 12 of the other end of said optical fiber 7, when around when being air dielectric, cut off angle θ and be $\mathrm{\θ}\≤\frac{\mathrm{\π}}{2}\±{\mathrm{Sin}}^{-1}\left(\frac{\mathrm{NA}}{n}\right)-{\mathrm{Sin}}^{-1}\left(\frac{1}{n}\right)$ Wherein NA enters the effective numerical aperture of optical fiber 7 stem stems for the YAG laser coupled, get NA=0.12, n is an optical fiber stem stem coefficient of refraction, generally, the optical fiber stem stem is a fused quartz, its coefficient of refraction n=1.45843, so in the above-mentioned formula of coefficient of refraction substitution of optical fiber stem stem, θ≤41.85 °, in order around oval optical surface 12, to form air dielectric interlayer 13, in the outside of cutting off oval optics face 12 outer housing 9 is arranged, outer housing 9 is to make with the capillary quartz ampoule of end sealing, embeds outer housing 9 backs and forms sealant 10 with fibre cladding 14 contact portions with bonding agent.Fused quartz material SiO ₂Being corroded the process that makes its transparent surface become the hair devitrification in containing liquid such as NaCl and water is Na ⁺, OH ^-And SiO ₂Produce under the heat-flash situation at the laser emitting position, can form Na ₂SO ₃, and sodium silicate can be dissolved in water.Be corroded in order to prevent that the quartzy shroud of capillary from contacting with liquid; outer housing 9 and sealant 10 outsides apply silicone oil to 1.06 μ laser-light transparent as anti-corrosion protection layer 11; adding the cover heat-shrinkable T bush in the outside of protective layer 11 in the position of optical fiber coating 15 contacts is back-up coat 8; it all can strengthen the fastness that is connected of outer housing 9 with the optical fiber of capillary quartz ampoule with silicone oil protective layer 11; in case outer housing 9 comes off, but the length of suitably choosing heat-shrinkable T bush also indexed optical fiber enter the cystoscopic degree of depth.As shown in Figure 1.

Adopt the side emission type optical tool bit of said structure that following advantage is arranged: removable general-purpose interface (SMA) fibre-optical splice 2-6 can use repeatedly, when the circular optical surface 1 of fiber tip damages because of the coupling mismatch, can pull down and reinstall use after refacing, unlikely whole optical tool bit scrapped; After optical tool bit was scrapped, removable general-purpose interface (SMA) fibre-optical splice 2-6 still can join new optical fiber reuse; Silicone oil isolated protective layer 11 in quartz capillary outer housing 9 outsides can prevent SiO ₂Material is corroded, thereby has prolonged the service life of optical tool bit; The back-up coat 8 of protective layer 11 and heat-shrinkable T bush also can be prevented coming off of outer housing 9, strengthens the fastness of capillary tube outer housing 9, is not destroyed to keep oval optical surface 12 ambient air dielectric interlayer 13, and the life-span is prolonged, and removes the hardship that come off by outer housing 9 from.

Description of drawings:

Fig. 1 is the structural representation of improvement general-purpose interface of the present utility model (SMA) side emission type optical tool bit.

Embodiment:

SMA side emission type optical tool bit with reference to Fig. 1 structure, get and be about 3 meters, one of the optical fiber that quartzy core diameter is Φ 0.6mm, after one end is peeled off covering 14 and is about 2.5mm with coating 15, wear into circular optical surface 1, the other end is peeled off covering 14 about 6mm and is grown, it is long to peel off coating 15 about 9mm, cut off angle θ=37 °, wear into oval optical surface 12, standby behind the careful clean surface.Press the dimensional accuracy working joint contact pin 2 of IEC 874-2 1993 standards, contact pin tightens up nut 3, the opening elastic ring 4 of choosing Φ 7.1 * 0.5 * 1 flexibly connects both, guarantee firmly lock in the accurate SMA905 of insertion of the contact pin energy socket and with nut 3, the size that elasticity Fibre cartridge for optical connector 5 and optical fiber tighten up nut 6 is made and is enough to tighten up optical fiber, outside coordination attractive in appearance.The external diameter of outer housing 9 is identical with the optical fiber external diameter, and internal diameter is identical with fibre cladding 14 external diameters, and outer housing 9 effective cylinders are about 10mm.

By above stated specification, pack into optical fiber 7 in the removable SMA connector and tighten up; At outer housing 9 on the radiator grille of oval optical surface 12 and be bonded on the covering 14; evenly be coated with one deck silicone oil as protective layer 11 in its junction; this protective layer encases the seam of outer housing 9 and optical fiber coating, the back-up coat 8 of the outside reheat Heat-Shrinkable Tubings that protective layer 11 contacts with coating 15.

This novel side emission type optical tool bit than service life of the described side emission type optical tool bit of prior art to three to five times of the youthful and the elderlys.

Claims (1)

1. side emission type optical tool bit that improves general-purpose interface, comprise: several meters long silica fibre (7), two ends are removed fibre cladding (14) and coating (15) respectively, expose stem stem, the stem stem end face of one end is circular optical surface (1), this end inserts the joint contact pin (2) that contains standard, contact pin tighten up nut (3) and elastic ring (4) with the laser medicine instrument on the Optical fiber plug (17) that is complementary of fiber-optical socket, the stem stem end face of the other end cuts off ovalisation optical surface (12), in the outside of oval optics face (12) outer housing (9) is arranged, on the contact portion of outer housing (9) and fibre cladding (14) sealant (10) is arranged, it is characterized in that the contact pin (2) in the Optical fiber plug that can roll over (17) vertically has fluting to become elasticity Fibre cartridge for optical connector (5) away from an end of the circular optical surface of optical fiber (1) along sidewall, the outer nut (6) that tightens up of elasticity Fibre cartridge for optical connector (5); On the outer surface of outer housing (9) and sealant (10) etch-proof protective layer (11) is arranged, there is back-up coat (8) outside that protective layer (11) contacts with coating (15).