Microscope and microscopy method for imaging an object involving changing size of depth-of-field region

Patent metadata

Field	Value
Publication number	US-11143857-B2
Application number	US-201916402209-A
Country	US
Kind code	B2
Filing date	May 2, 2019
Priority date	May 3, 2018
Publication date	Oct 12, 2021
Grant date	Oct 12, 2021

Abstract

A microscopy method for imaging an object includes: imaging the object into an optical image onto an image detector, generating electronic image data from the optical image using the image detector and generating an electronic image from the electronic image data, defining a region of interest in the electronic image, determining a depth distribution in the region of interest and/or in a region of the object corresponding to the region of interest, determining a desired depth region in the depth distribution, selecting at least one imaging parameter with which a size of a depth-of-field region can be changed, and setting the depth-of-field region of the electronic image by changing the at least one selected imaging parameter such that the depth-of-field region covers the desired depth region or covers a specific portion thereof.

First claim

What is claimed is:

1. A microscopy method for imaging an object, the method comprising:
imaging the object into an optical image on an image detector;
generating electronic image data from the optical image with the image detector;
generating an electronic image from the electronic image data;
defining a region of interest in the electronic image;
determining a depth distribution in the region of interest and/or in a region of the object that corresponds to the region of interest;
determining a desired depth region in the depth distribution;
selecting at least one imaging parameter with which a size of a depth-of-field region can be changed; and
setting the depth-of-field region of the electronic image by changing the at least one imaging parameter to permit the depth-of-field region to cover the desired depth region or to cover a specific portion thereof.

2. The microscopy method according to claim 1 , wherein the desired depth region is determined based on the region of interest.

3. The microscopy method according to claim 1 , further comprising:
imaging the object onto the image detector with an adjustable imaging scale, wherein the at least one imaging parameter is an optical imaging scale;
reducing the optical imaging scale to set the depth-of-field region; and
digitally post-enlarging the electronic image for compensation.

4. The microscopy method according to claim 1 , further comprising:
imaging the object onto the image detector with a stop having an adjustable aperture size, wherein the at least one imaging parameter is the adjustable aperture size; and
changing the adjustable aperture size to set the depth-of-field region.

5. The microscopy method according to claim 4 , further comprising:
changing a quantity of light during the imaging of the object onto the optical image and/or during the generating of the electronic image data to compensate the changing of the adjustable aperture size.

6. The microscopy method according to claim 3 , wherein:
a focal length of the imaging is adjustable, and
the depth-of-field region is centered onto the desired depth region by changing the focal length.

7. The microscopy method according to claim 1 , further comprising:
determining the depth distribution in the object using a depth distribution sensor.

8. The microscopy method according to claim 1 , further comprising:
generating an electronic stereo image of the object, the electronic stereo image including two partial images.

9. The microscopy method according to claim 8 , further comprising:
applying the microscopy method to only one of the two partial images.

10. The microscopy method according to claim 8 , further comprising:
calculating the depth distribution from one of the two partial images.

11. The microscopy method according to claim 1 , further comprising:
displaying the electronic image on a display device,
capturing a location on the display device at which an observer aims his or her gaze during a specified time interval with a capturing device included in a control device, and
wherein the control device is configured to define the region of interest based on the location.

12. A microscope for capturing an electronic image of an object, the microscope comprising:
an image detector configured to generate electronic image data from an optical image;
an imaging optics configured to image the object into the optical image on the image detector, and
a control device having an input device and being configured to:
generate an electronic image of the object from the electronic image data,
select a region of interest in the electronic image with the input device,
determine a depth distribution in a region of interest and/or in a region of the object corresponding to the region of interest,
determine a desired depth region in the depth distribution with the input device,
select at least one imaging parameter to change a size of a depth-of-field region, and
set the depth-of-field region by changing the at least one selected imaging parameter to permit the depth-of-field region to coincide with the desired depth region.

13. The microscope according to claim 12 , wherein the control device is configured to:
image the object into an optical image on an image detector;
generate electronic image data from the optical image with the image detector;
generate an electronic image from the electronic image data;
define a region of interest in the electronic image;
determine a depth distribution in the region of interest and/or in a region of the object that corresponds to the region of interest;
determine a desired depth region in the depth distribution,
select at least one imaging parameter with which a size of a depth-of-field region can be changed, and
set the depth-of-field region of the electronic image by changing the at least one selected imaging parameter to permit the depth-of-field region to cover the desired depth region or to cover a specific portion thereof.

Assignees

• Zeiss Carl Meditec Ag

Inventors

• Regensburger Alois
• Hoegele Artur
• Hauger Christoph

Classifications

• G02B21/22 Primary

  Stereoscopic arrangements · CPC title

• G02B21/0012

  Surgical microscopes (counterbalanced structures for surgical microscopes G02B7/001) · CPC title

• G02B21/367

  providing an output produced by processing a plurality of individual source images, e.g. image tiling, montage, composite images, depth sectioning, image comparison · CPC title

• G02B21/365

  Control or image processing arrangements for digital or video microscopes (G02B21/361, G02B21/362 take precedence) · CPC title

• G06T7/593

  from stereo images · CPC title