Telecentric modular zoom system

Patent metadata

Field	Value
Publication number	US-9429740-B2
Application number	US-201414255900-A
Country	US
Kind code	B2
Filing date	Apr 17, 2014
Priority date	Apr 19, 2013
Publication date	Aug 30, 2016
Grant date	Aug 30, 2016

Abstract

The invention relates to a telecentric modular zoom system for mapping an object plane on a sensor, in particular in a digital transmitted light microscope or incident light microscope having interchangeable lenses, comprising a fixed tube lens unit (LG 1 ) and multiple optical assemblies (LG 2 , LG 3 , LG 4 , LG 5 , LG 6 ), at least two of which are adjustably arranged relative to one another for the purpose of changing the magnification, characterized in that [sic]. According to the invention, a physical aperture (BL) conjugated relative to the rear focal points of the objectives used and having a variable diameter may be arranged in the beam path, wherein the rear focal points of the objective may be mapped in the space between a sensor image (BIE) and the intermediate image (ZB), the images of the rear focal points of the objectives (aperture BL) and the sensor image (BIE) do not lie within or migrate through the optical assemblies (LG 2 , LG 3 , LG 4 , LG 5 , LG 6 , LG 7 ).

First claim

The invention claimed is:

1. A telecentric module zoom system for mapping an object plane on a sensor in a digital transmitted light microscope or incident light microscope having interchangeable lenses, comprising:
a fixed tube lens unit (LG 1 ) and a plurality of optical assemblies (LG 2 , LG 3 , LG 4 , LG 5 , LG 6 , LG 7 ), at least two of which are adjustably arranged relative to one another for the purpose of changing the magnification,
wherein a physical aperture (BL) conjugated relative to rear focal points of objectives used and having a variable diameter is arranged in the beam path,
wherein the rear focal points of an objective are mapped in the space between a sensor image (BIE) and an intermediate image (ZB); and the intermediate image (ZB), the images of the rear focal points of the objectives and the sensor image (BIE) do not lie within or migrate through the plurality of optical assembles (LG 2 , LG 3 , LG 4 , LG 5 , LG 6 , LG 7 ), and
wherein the aperture (BL) is axially movable,
wherein the plurality of optical assemblies comprises four optical assemblies (LG 1 , LG 2 , LG 3 , LG 4 ), an intermediate image (ZB) and an aperture (BL), wherein, starting from the object side of the aperture plane (BLE),
a tube lens unit as a first fixed assembly (LG 1 ),
second movable assembly (LG 2 ) having positive refractive power,
a movable intermediate image (ZB)
a third movable group (LG 3 ) having positive refractive power,
a movable aperture (BL) and
a fourth fixed assembly (LG 4 ) having positive refractive power are implemented.

2. The telecentric modular zoom system according to claim 1 ,
wherein the aperture (BL) moves conjugate relative to the rear focal points of the objective depending on the position thereof.

3. The telecentric modular zoom system according to claim 1 ,
wherein the following relation applies to the aperture (BLE):
diameter aperture min≧diameter aperture max/3,

wherein the diameter of the aperture min is set at a magnification (β) min and the diameter of the aperture max is set at a magnification (β) max.

4. The telecentric modular zoom system according to claim 1 ,
wherein the maximum aperture diameter in the aperture plane (BLE) at a maximum magnification (β) equals 20 mm.

5. A telecentric module zoom system for mapping an object plane on a sensor in a digital transmitted light microscope or incident light microscope having interchangeable lenses, comprising:
a fixed tube lens unit (LG 1 ) and a plurality of optical assemblies (LG 2 , LG 3 , LG 4 , LG 5 , LG 6 , LG 7 ), at least two of which are adjustably arranged relative to one another for the purpose of changing the magnification,
wherein a physical aperture (BL) conjugated relative to rear focal points of objectives used and having a variable diameter is arranged in the beam path,
wherein the rear focal points of an objective are mapped in the space between a sensor image (BIE) and an intermediate image (ZB); and the intermediate image (ZB), the images of the rear focal points of the objectives and the sensor image (BIE) do not lie within or migrate through the plurality of optical assembles (LG 2 , LG 3 , LG 4 , LG 5 , LG 6 , LG 7 ), and
wherein the aperture (BL) is axially movable,
wherein the plurality of optical assemblies comprises five optical assemblies (LG 1 , LG 2 , LG 3 , LG 4 , LG 5 ), an intermediate image (ZB) and an aperture (BL), wherein, starting from the object side of the aperture plane (BLE),
a tube lens unit as a first fixed assembly (LG 1 ),
a field lens as a second movable assembly (LG 2 ),
a movable intermediate image (ZB),
a third movable assembly (LG 3 ) having positive refractive power,
a movable aperture (BL),
a fourth movable assembly (LG 4 ) having positive refractive power and
a fifth fixed assembly (LG 5 ) having negative refractive power are implemented.

6. A telecentric module zoom system for mapping an object plane on a sensor in a digital transmitted light microscope or incident light microscope having interchangeable lenses, comprising:
a fixed tube lens unit (LG 1 ) and a plurality of optical assemblies (LG 2 , LG 3 , LG 4 , LG 5 , LG 6 , LG 7 ), at least two of which are adjustably arranged relative to one another for the purpose of changing the magnification,
wherein a physical aperture (BL) conjugated relative to rear focal points of objectives used and having a variable diameter is arranged in the beam path,
wherein the rear focal points of an objective are mapped in the space between a sensor image (BIE) and an intermediate image (ZB); and the intermediate image (ZB), the images of the rear focal points of the objectives and the sensor image (BIE) do not lie within or migrate through the plurality of optical assembles (LG 2 , LG 3 , LG 4 , LG 5 , LG 6 , LG 7 ), and
wherein the aperture (BL) is axially movable,
wherein the plurality of optical assemblies comprises five optical assemblies (LG 1 , LG 2 , LG 3 , LG 4 , LG 5 ), an intermediate image (ZB) and an aperture (BL), wherein, starting from the aperture plane (BLE) on the object side,
a tube lens unit as a first fixed assembly (LG 1 ),
a field lens as a second fixed assembly (LG 2 ),
a fixed intermediate image (ZB),
a third movable assembly (LG 3 ) having positive refractive power,
a movable aperture (BL),
a fourth movable assembly (LG 4 ) having positive refractive power, and
a fifth movable assembly (LG 5 ) having negative refractive power are implemented.

Assignees

• Zeiss Carl Microscopy Gmbh

Inventors

• Winterot Johannes
• Dobschal Hans-Juergen
• Shafer David

Classifications

• G02B9/64

  having more than six components · CPC title

• G02B27/4211

  correcting chromatic aberrations (G02B27/0056, G02B27/4222, G02B27/4227 take precedence) · CPC title

• G02B15/14

  by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective · CPC title

• G03B5/00

  Adjustment of optical system relative to image or object surface other than for focusing · CPC title

• G02B5/005

  Diaphragms (for cameras G03B9/02) · CPC title