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Manipulator device for the transfer of laser light into an optical fiber
| Details |
Inventors: Raagaard, Jacob; Nielsen, Claus J.;
Assignee: DantecElectronik, Medicinsk OG Videnskabeligt M.ang.leudstyr A/S (Skovlunde, DK)
Primary Examiner: Sikes; William L.
Assistant Examiner: Healy; Brian M.
Attorney, Agent or Firm: Larson & Taylor
For the transfer of laser light into an optical fiber in such a manipulator evice a laser beam is made to form a very finely focused spot of light on the end face of an optical fiber. In order to obtain an optimal transfer efficiency the manipulator includes firstly a plug member with fiber and focusing lens adjustable in the optical axial direction (z-direction) and, secondly, a supporting tube disposed in the z-direction in front of the lens for an optical glass body. Said supporting tube is adjustable in x- and y-directions at right angles to the z-axis, against the bias force from a spring member and angularly adjustable in relation to the z-axis. |
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DETAILED DESCRIPTION The invention differs from the above prior art in that the transferring manipulator device includes, a housing adapted to be located in the path of the laser beam and provided with an inlet opening for the arriving laser beam, a mainly tubular plug means displaceable in the axial z-direction in relation to the housing for the optical fibre and for focusing optics, resp.
, the latter being substantially axially centred on the axis of the fibre, a supporting tube accommodated in the housing for an optical glass body axially disposed on the z-axis, and means for maintaining the supporting tube in contact with adjusting means located respectively at either end of the supporting tube and adapted to adjust the position of supporting tube in relation to the z-axis in the housing.
The basic idea of the invention was to make solely the fibre and/or the supporting means for the fibre and the optics coarsely and finely adjustable in the axial z-direction, while the adjusting functions of the parameters x, y, .
theta.
.
sub.
x, .
theta.
.
sub.
y, in contradiction to the prior solution, have now been transferred to the glass member supporting tube that is x-y-displaceable and tiltable within the housing by means of the adjusting means.
It is then possible--this will be explained more specifically later on in the description--to trim said five parameters (x, y, z, .
theta.
.
sub.
x, .
theta.
.
sub.
y) mutually independently, and a very minute trimming is obtained by means of the optical body, since the beam moves only a little even in case of large movements of the glass body.
Moreover, a series of advantages is obtained.
Firstly, all of the active components of the manipulator are encapsulated within the housing and thus protected against physical influences from outside.
A very light and compact structure constituted by a few components is obtained.
Said maintaining means may advantageously consist in that the adjusting means are made from soft iron and that at least part of the supporting tube is magnetic
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I/O Systems 
