Endoscopic optical system

Patent metadata

Field	Value
Publication number	US-2018024347-A1
Application number	US-201515541735-A
Country	US
Kind code	A1
Filing date	Dec 16, 2015
Priority date	Jan 9, 2015
Publication date	Jan 25, 2018
Grant date	—

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.

First claim

What is claimed is:

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.

Assignees

• Winter & Ibe Olympus

Inventors

• Kiedrowski Gregor
• Schouwink Peter

Classifications

• G02B27/0025

  for optical correction, e.g. distorsion, aberration · CPC title

• G02B23/2407 Primary

  Optical details · CPC title

• G02B23/2476

  Non-optical details, e.g. housings, mountings, supports · CPC title

• A61B1/0011

  Manufacturing of endoscope parts · CPC title

• G02B5/3083

  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) · CPC title