公开(公告)号：WO1991011743A1

公开(公告)日：1991-08-08

申请号：PCT/US1991000565

申请日：1991-01-28

Applicant: OLYMPUS CORPORATION

Inventor： OLYMPUS CORPORATION ,  MESSINGER, Elmar, K.

IPC: G02B23/26

CPC classification number: A61B1/07 ,  A61B1/00126 ,  A61B1/0669 ,  A61B1/128 ,  G02B6/0006 ,  G02B6/4296 ,  G02B6/4298 ,  G02B23/2469

Abstract: A fiberoptic bundle or liquid light guide (3) for a borescope, fiberscope or videoscope is coupled to the light source (2) using a light guide coupler (5) having a plurality of air passages (11) to vent excess heat. The illumination unit comprises a fan (7) that draws cool air through the passages (11) into the light source (2) to remove excess heat from the light guide coupler (5). Heat radiators can be added to the coupler to increase its surface area and to improve heat dissipation. Air baffles can be added to optimize the air flow through the light guide coupler (5). The light guide coupler (5) thus acts as a heat sink while dissipating excess heat using an air flow caused by the difference in air pressure created by the fan in the illumination unit (1).

公开(公告)号：WO1990006081A1

公开(公告)日：1990-06-14

申请号：PCT/US1989005429

申请日：1989-12-05

Applicant: OLYMPUS CORPORATION

Inventor： OLYMPUS CORPORATION ,  COSTELLO, James, G.

IPC: A61B05/055

CPC classification number: A61B5/055 ,  G01R33/28 ,  G02B6/06 ,  G09F9/305

Abstract: A coherent fiberoptic display (9) for a region having strong magnetic field comprises transfer optics (2) which launch the image into one end of a coherent fiberoptic bundle (3) that transfers the image from (1) to a fiberoptic display (9). The image from (1) is viewed on the expanded end of a fiberoptic taper (8). The image can comprise a video image formed by a CRT (1) located in a region of low magnetic flux density (5) and the fiberoptic taper (8) can be positioned in the imaging zone of a Magnetic Resonance Imaging (MRI) apparatus (10). The video image can allow the patient (11) to watch television during magnetic resonance imaging. This distraction will reduce the anxiety experienced during magnetic resonance so that the patient is less apt to move and the magnetic resonance images are less apt to be blurred or destroyed. The efficiency of magnetic resonance imaging is thus improved.