CN2205216Y - Optical fiber coupling light tuning device for helium neon laser therapy apparatus - Google Patents

Abstract

The utility model discloses an optical fiber coupling light tuning device for a helium-neon laser therapy apparatus, which is particularly used for the controlling the light intensity on a helium-neon laser therapy apparatus. The utility model replaces an optical attenuation sheet with a metal anti-dazzling screen (3) to control the light quantity of the laser generated by a laser tube (1) entering a fiber optic coupler (9). The utility model is only composed of the anti-dazzling screen (3), a bell crank (5), a hole sealing disc (6), an adjusting disc (7), a coupling seat (8) matching and loading the fiber optic coupler (9), etc. The hole sealing disc (6) is arranged on a casing (2) as a bracket; the adjusting disc (7) is sheathed on the shaft neck of the coupling seat (8) which is arranged in the core hole of the hole sealing disc (6); the crank of the bell crank (5) positioned in an involute helical groove which is inserted in the inner end face of the adjusting disc (7) can steadily transfer through rotating the adjusting disc (7), causing the anti-dazzling screen (3) which is fixedly arranged on the rotating shaft end head of the bell crank (5) to transfer.

Description

Optical fiber coupling light tuning device for helium neon laser therapy apparatus

This utility model relates to a kind of device of machinery control light intensity, particularly a kind of He-Ne laser core instrument optical fiber coupling light modulating device.

The being seen in the market He-Ne laser core instrument that is used for the intravascular brachytherapy disease, the light modulating device of its control optical fiber stiffness of coupling generally all is to adopt with us to be called " a kind of He-Ne laser inner blood vessel irradiating therapeutic instrument " (number of patent application is 931150558) version that disclosed light modulating device is similar with name, promptly utilize the plane of incidence of the optical attenuation sheet of adjusting device on laser tube outfan and fiber coupler centre position and the relative angle of the laser beam that laser tube sends to control the light intensity that enters in the fiber coupler, thus the laser intensity that the optical fiber syringe needle on the control treatment head is exported.This is a kind of light modulation means commonly used in light path design, but is that to belong to the higher a kind of scheme of cost, the particularly processing technology of optical attenuation sheet wherein just very complicated in production practices, and the cycle is longer.And but dimming effect is not ideal enough.

The purpose of this utility model be again to the public provide that a kind of production cost is lower, the He-Ne laser core instrument optical fiber of good dimming effect coupling light modulating device.

For ease of introducing, we comprehensively narrate technical conceive of the present utility model and specific embodiments by accompanying drawing:

Fig. 1 is this novel light modulating device assembling condition sketch map in He-Ne laser core instrument;

The axial cut-away view of a kind of organization plan of Fig. 2 closure plate;

Fig. 3 is the axial section configuration diagram of coupling seat;

Fig. 4 is the axial section configuration diagram of adjustment disk;

Fig. 5 is helicla flute and a damping fin setting-in cave arrangement sketch map on the inner face of adjustment disk.

This novel light modulating device that is exclusively used on the He-Ne laser core instrument, also be mounted between laser tube (1) and the fiber coupler (9), only we have substituted optical attenuation sheet commonly used with a foil of handling through blackout as brake sack (3), launch laser beam and enter light quantity in the fiber coupler (9) in order to directly to block laser tube (1), thus the laser intensity that the optical fiber pin (13) in the control treatment head (12) sends.Whole light modulating device is to be hidden the crank throw (5) of emission port area of laser tube (1) and closure plate (6) that one plays the support effect, an adjustment disk (7) and assembled as the coupling seat (8) of axis by a manipulation brake sack (3), closure plate (6) is coaxial with the laser beam that is packed in the laser tube (1) in the housing (2) with the core hole, be fitted in laser tube (1) outfan in the hole seat offered on the right housing (2); Described crank throw (5) is two ends to be on same plane with a thinner metal bar to be bent into the right angle respectively in the other direction and to turn, one of them termination is rotating shaft, the screw thread that installs brake sack (3) in its termination articulation, and the other end is crank, crank throw is fitted on closure plate (6) wall towards the inner chamber of housing (2) with the termination of rotating shaft, axial line parallels in the shaft hole of offering with closure plate (6) core hole axial line, brake sack (3) then is on the rotating shaft termination that perpendicular shape is packed in crank throw (5) with the laser beam of plane and laser tube (1), brake sack (3) is the smaller the better with the distance of laser tube (1) output end face, but should not wipe the output end face of running into laser tube (1), on the rotating shaft neck of the crank throw (5) between brake sack (3) and closure plate (6) inner face, preferably damped ring (4) of making of rubber or other elastomeric material of sleeve gasket produces bobbing in order to restriction brake sack (3) when accent revolves; Coupling seat (8) is the axis of whole light modulating device, it is again the assembling stand of fiber coupler (9), coupling seat (8) just is fitted in the core hole of closure plate (6) with end thereafter, the core hole axial line of coupling seat (8) should overlap with the axial line of closure plate (6), is connecting the fiber coupler (9) that is being hinged with on the terminal head of optical fiber (11) of treatment head (12) and is being fixed and is fitted in the front end position in coupling seat (8) the core hole; Adjustment disk (7) essence is exactly the turn-knob of alloting of this novel light modulating device, adjustment disk (7) is to be contained on the axle journal of coupling seat (8) middle part with the core borehole jack, the inner face of adjustment disk (7) almost with relative subsides the in outer face of closure plate (6), be the rotator inertia of restriction adjustment disk (7) when tuning, be preferably in the damping fin made from rubber or other elastomeric material on the liner between the contact surface of the inner face of adjustment disk (7) and closure plate (6) outer face (10), damping fin (10) also can be inlaid on the inner face of adjustment disk (7) or in the damping fin setting-in cave of offering on the relevant position, outer face of closure plate (6); Brake sack (3) is by rotation adjustment disk (7) the crank deflection of crank throw (5) to be realized to the size of laser tube (1) the output end face amount of blocking.It is the involute helicla flute at center with the axial line together that practical version is offered on the inner face of adjustment disk (7) exactly, and the crank end that makes crank throw (5) is inserted in the involute helicla flute on adjustment disk (7) inner face, when adjustment disk (7) rotates, just the crank of crank throw (5) can be offset reposefully, thereby the rotating shaft of crank throw (5) is rotated, the brake sack (3) that is packed on crank throw (5) the rotating shaft termination also just changes to the shielded area of laser tube (1) outfan, and this has just controlled the size of the laser beam of laser tube (1) ejaculation.Reverse size simultaneously and do the photoswitch effect.

The structure of this novel dimmer arrangement is very simple, and each part all be need not any special process technology requirement, and closure plate wherein (6), adjustment disk (7) and coupling seat (8) all are to be the garden to coil and garden axle shape, so be easy to guarantee the concentricity of assembling; With the optical attenuation sheet that metal brake sack instead of glass is made, proof has better dimming effect in practicality.

Claims (1)

1, a kind of He-Ne laser core instrument optical fiber coupling light modulating device, it is installed between laser tube (1) and the fiber coupler (9), it is characterized in that: it is by brake sack (3), crank throw (5), closure plate (6), adjustment disk (7) and coupling seat (8) assemble, closure plate (6) is coaxial with the laser beam that is packed in the laser tube (1) in the housing (2) with the core hole, be fitted in laser tube (1) outfan in the hole seat offered on the right housing (2), crank throw (5) is fitted on closure plate (6) wall with the inner chamber of its rotating shaft termination towards housing (2), in axial line and the shaft hole that closure plate (6) core hole axial line parallels, brake sack (3) is on the rotating shaft termination that perpendicular shape is packed in crank throw (5) with the laser beam of plane and laser tube (1), on the rotating shaft neck of the crank throw (5) between brake sack (3) and closure plate (6) inner face, cover cushions damped ring (4), coupling seat (8) is fitted in the core hole of closure plate (6) with rearward end, connecting the fiber coupler (9) that is being hinged with on the terminal head of optical fiber (11) of treatment head (12) is packed in the front end position in coupling seat (8) the core hole, adjustment disk (7) is contained on the axle journal of coupling seat (8) middle part with the core borehole jack, damping fin (10) is inlaid on adjustment disk (7) inner face or in the damping fin setting-in cave on closure plate (6) relevant position, outer face, and the crank end of crank throw (5) is inserted in the involute helicla flute on adjustment disk (7) inner face.

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