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Lens system

a technology of a lens and a lens body, applied in the field of lenses, can solve the problems of low specificity, high sensitivity and specificity of available methods capable of screening large areas, and large false positives, and achieve the effect of high sensitivity and specificity

Inactive Publication Date: 2010-07-08
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is a lens system for an optical biopsy device that can form images at both a first and second magnification. The lens system has a common optical axis and can be designed to be compact and easily switched between the two magnifications. The first magnification allows for viewing a significant area of a target, while the second magnification allows for high sensitivity and specificity. The lens system can be used in a single optical biopsy procedure to examine a target on a cellular level and make a pathological determination. The invention also includes an image sensor to capture the image formed by the lens system.

Problems solved by technology

Firstly it must be able to scan a significant area within a limited time.
Secondly, it must have a high sensitivity and specificity.
The available methods capable of screening larger areas (in general non-point-like methods) have a high sensitivity but a rather low specificity.
Hence, these methods produce a lot of false positives.
These methods can give a good diagnosis but are not suited to scan significant areas in a short period of time.
This results in rather bulky devices.

Method used

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Embodiment Construction

[0028]Particular and preferred aspects of the invention are set out in the accompanying independent and dependent claims. Features of the dependent claims may be combined with features of the independent claims and with features of other dependent claims, as appropriate and not merely as explicitly set out in the claims.

[0029]The present invention will be described with respect to particular embodiments and with reference to certain drawings, but the invention is not limited thereto but only by the claims. Any reference signs in the claims shall not be construed as limiting the scope. The drawings described are only schematic and are non-limiting. In the drawings, the size of some of the elements may be exaggerated and not drawn to scale for illustrative purposes. Where the term “comprising” is used in the present description and claims, it does not exclude other elements or steps. Where an indefinite or definite article is used when referring to a singular noun e.g. “a” or “an”, “t...

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Abstract

A lens system comprises a first lens group and a second lens group, and is configured to form an image at a first magnification and at a second magnification. The lens system has a common optical axis in both magnifications. The lens system is further configured to form an intermediate image between the first lens group and the second lens group at the first magnification. The intermediate image formed in the first magnification is further imaged onto an optical detector. In the first magnification, the second lens group acts as a relay lens imaging the intermediate image onto the optical detector. In the second magnification, the first and second lens groups together form an image on the optical detector without forming an intermediate image.

Description

FIELD OF THE INVENTION[0001]This invention relates to a lens system, more in particular to the lens system included in an optical biopsy device.BACKGROUND TO THE INVENTION[0002]A biopsy is carried out during a minimal-invasive surgery to determine the status of a suspicious lesion. Since suspicious lesions must be visible for a surgeon, these biopsies are taken generally in a later stage of a disease. The biopsies are then sent to a pathologist to examine target tissue sections. The outcome thus depends on the local tissue samples that may or may not represent the actual disease stage in the tissue. Optical biopsy is an alternative method, where in-vivo optical technology is used to determine whether the disease has affected the tissue. This method also enables the diagnosis of the disease in an early stage. Light can interact with tissue in a number of ways, including elastic and inelastic (multiple or single) scattering, reflection at boundary layers and absorption, and can for in...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04N7/18G02B15/00G02B21/02G02B23/24
CPCG02B26/103G02B23/243
Inventor HENDRIKS, BERNARDUS HENDRIKUS WIHELMUSHIMIZU, JEFFKUIPER, STEIN
Owner KONINKLIJKE PHILIPS ELECTRONICS NV