# US 2014/0194687 A1 · Filter for use with imaging endoscopes

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- Number: US 2014/0194687 A1
- Document ID: US20140194687A1
- Status: Published application
- Kind: A1
- Application number: 14/154,177
- Filed: 2014-01-13
- Published: 2014-07-10
- Earliest claimed: 2005-05-04
- Assignees: Novadaq Technologies Inc.
- Applicants: Novadaq Technologies Inc.
- Inventors: John J.P. FENGLER; Francis REGAMEY
- Web page: https://patentgrep.com/patent/US20140194687A1

## CPC

- A61B 1/043: {for fluorescence imaging}
- A61B 1/00006: {of control signals}
- A61B 1/00009: {of image signals during a use of endoscope}
- A61B 1/00045: {Display arrangement}
- A61B 1/00101: {the distal tip features being detachable}
- A61B 1/00186: {with imaging filters}
- A61B 1/05: characterised by the image sensor, e.g. camera, being in the distal end portion
- A61B 1/0638: {providing two or more wavelengths}
- A61B 1/0646: {with illumination filters}
- A61B 1/0655: {Control therefor}
- A61B 1/0661: {Endoscope light sources}
- G02B 23/2423: {of the distal end}
- H04N 23/55: Optical parts specially adapted for electronic image sensors; Mounting thereof
- H04N 23/56: provided with illuminating means
- H04N 23/555: {for picking-up images in sites, inaccessible due to their dimensions or hazardous conditions, e.g. endoscopes or borescopes}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

A fluorescence endoscopy video system includes a multi-mode light source that produces light for white light and fluorescence imaging modes. A filter is positioned at the distal end of an imaging endoscope so that the endoscope can produce fluorescence and white light images of a tissue sample.

## Claims

### Claim 1

A filter assembly for use with an imaging endoscope, comprising:
a filter adapted to be positioned in front of an imaging lens of the endoscope, the filter blocking excitation light from reaching an image sensor of the endoscope so that the image sensor can produce fluorescence images, the filter also passing an amount of blue light so that the image sensor can produce white light images of the tissue.

### Claim at position 2

2-27. (canceled)