ENDOSCOPIC OPTICAL SYSTEM

• US 20180024347A1
• Filed: 12/16/2015
• Published: 01/25/2018
• Est. Priority Date: 01/09/2015
• Status: Active Grant

• Current Assignee: Olympus Winter & Ibe GmbH (Olympus Corporation)
• Original Assignee: Olympus Winter & Ibe GmbH (Olympus Corporation)
• Inventors: KIEDROWSKI, Gregor, SCHOUWINK, Peter
• Granted Patent: US 10,481,383 B2
• Time in Patent Office: Days
• CPC Class Codes: A61B 1/0011 Manufacturing of endoscope parts
• CPC Class Codes: A61B 1/0017 Details of single optical fibres, e.g. material or cladding
• CPC Class Codes: A61B 1/00186 with imaging filters
• CPC Class Codes: G02B 23/2407 Optical details
• CPC Class Codes: G02B 23/243 Objectives for endoscopes
• CPC Class Codes: G02B 23/2476 Non-optical details, e.g. housings, mountings, supports
• CPC Class Codes: G02B 23/26 using light guides for illumination G02B23/2469
• CPC Class Codes: G02B 27/0025 for optical correction, e.g. distorsion, aberration
• CPC Class Codes: G02B 27/1066 for enhancing image performance, like resolution, pixel numbers, dual magnifications or dynamic range, by tiling, slicing or overlapping fields of view
• CPC Class Codes: G02B 5/3083 Birefringent or phase retarding elements G02B5/3008, G02B5/3016 take precedence; systems for polarisation control G02B27/286; manufacturing phase modulating patterns by lithographic processes G03F7/001

Abstract

An endoscopic optical system including: a fiber image conductor arranged in an elongated shaft tube, the fiber image conductor having a proximal face; an objective arranged distally relative to the fiber image conductor; an observation device arranged proximally relative to the proximal face of the fiber image conductor; a mask; and a transparent cover pane arranged between the proximal face of the fiber image conductor and the observation device; wherein the transparent cover pane is configured as a moire filter.

Claims

1. An endoscopic optical system comprising:

a fiber image conductor arranged in an elongated shaft tube, the fiber image conductor having a proximal face;

an objective arranged distally relative to the fiber image conductor;

an observation device arranged proximally relative to the proximal face of the fiber image conductor;

a mask;

a transparent cover pane arranged between the proximal face of the fiber image conductor and the observation device;

wherein the transparent cover pane is configured as a moire filter.

2. The endoscopic optical system according to claim 1, wherein the moire filter comprises a plurality of birefringent layers arranged parallel to a distal face of the moire filter, the plurality of birefringent layers being arranged so as to produce blurring in different directions parallel to the distal face.

3. The endoscopic optical system according to claim 2, wherein the plurality of birefringent layers comprises three birefringent layers.

4. The endoscopic optical system according to claim 1, wherein the mask is arranged on a distal face of the moire filter.

5. The endoscopic optical system according to claim 4, wherein the mask is a vapor deposition layer on the distal face of the moire filter.

6. The endoscopic optical system according to claim 1, further comprising an adhesive disposed on a distal face of the moire filter to adhere the proximal face of the fiber image conductor to the distal face of the moire filter.