Imaging devices, imaging arrangements, and imaging methods

• US 10,724,958 B2
• Filed: 11/06/2017
• Issued: 07/28/2020
• Est. Priority Date: 11/06/2017
• Status: Active Grant

• Current Assignee: Sensors Unlimited Inc. (Rtx Corporation)
• Original Assignee: Sensors Unlimited Inc. (Rtx Corporation)
• Inventors: Nguyen, Thuc-Uyen
• Primary Examiner(s): Porta, David P
• Assistant Examiner(s): Gutierrez, Gisselle M
• Application Number:
  US15/804,460
• Publication Number:
  US 20190137400A1
• Time in Patent Office: 995 Days
• Field of Search: 2504591, 2504581
• CPC Class Codes: G01N 2021/6471 Special filters, filter wheel
• CPC Class Codes: G01N 21/6458 Fluorescence microscopy fluorescence microscopes per se G02B21/0076 and G02B21/16
• CPC Class Codes: G02B 21/06 Means for illuminating specimens
• CPC Class Codes: G02B 21/084 having annular illumination around the objective
• CPC Class Codes: G02B 21/16 adapted for ultraviolet illumination ; Fluorescence microscopes G02B21/0076 takes precedence
• CPC Class Codes: G02B 26/001 based on interference in an adjustable optical cavity interference filters G02B5/28; devices or arrangements using multiple reflections in spectrometry or monochromators G01J3/26

Abstract

An imaging device includes a camera and an illuminator. The illuminator is positioned and configured to illuminate an article through an illuminator tunable filter disposed along an optical axis and capture an image of the article through a camera tunable filter arranged along the optical axis. Imaging arrangements and imaging methods are also described.

Claims

1. An imaging device, comprising:

a camera; and

an illuminator positioned and configured to illuminate an article through an illuminator tunable filter disposed along an optical axis and capture an image of the article through a camera tunable filter arranged along the optical axis, wherein the imaging device does not have a dichroic mirror;

wherein the illuminator tunable filter and the camera tunable filter are coplanar with one another.

2. The imaging device as recited in claim 1, wherein one of the illuminator tunable filter and camera tunable filter parametrically surrounds the other of the illuminator tunable filter and camera tunable filter.

3. The imaging device as recited in claim 1, wherein the wherein one of the illuminator tunable filter and camera tunable filter has a plurality of filter elements.

4. The imaging device as recited in claim 1, further comprising a lead electrically connected to one of the illumination tunable filter and the camera tunable filter.

5. The imaging device as recited in claim 1, wherein at least one of the illuminator tunable filter and the camera tunable filter transmits light with wavelength in the first bandpass upon receipt of a first voltage, wherein the tunable filter arrangement transmits light with wavelength in the second bandpass upon receipt of a second voltage.

6. The imaging device as recited in claim 1, further comprising a voltage source electrically connected to at least one of the illuminator tunable filter and the camera tunable filter.

7. The imaging device as recited in claim 1, further comprising a camera tunable filter lead, the camera tunable filter lead being electrically connected to the camera tunable filter and electrically isolated from the illuminator tunable filter.

8. The imaging device as recited in claim 1, further comprising a stage with an article containing a fluorophore optically coupled to at least one of the illuminator tunable filter and the camera tunable filter.

9. The imaging device as recited in claim 1, further comprising:

a controller operatively connected to the tunable filter arrangement,

wherein the controller is configured to select bandpass of the tunable filter arrangement without optically uncoupling the illuminator tunable filter and the camera tunable filter from the optical axis.

10. An imaging arrangement, comprising:

an imaging device as recited in claim 1;

an ocular lens arranged along the optical axis;

an objective lens optically coupled to the ocular lens by the optical axis; and

a tunable filter arrangement including the illuminator tunable filter and the camera tunable filter, the tunable filter arrangement optically coupled to the ocular lens and the objective lens and arranged between the ocular lens and objective lens,

wherein the illuminator tunable filter and camera tunable filter each have a first bandpass and at least one second bandpass to image an article containing a fluorophore with a camera and illuminator disposed along the optical axis without an intervening dichroic mirror.

11. The imaging arrangement as recited in claim 10, wherein the camera is optically coupled to the ocular lens by the illuminator tunable filter.

12. The imaging arrangement as recited in claim 10, wherein the illuminator is optically coupled to the ocular lens by the tunable filter arrangement.

13. The imaging arrangement as recited in claim 10, wherein the camera tunable filter is coplanar with the illuminator tunable filter, and further comprising:

a first lead electrically connected to the illuminator tunable filter; and

a second lead electrically connected to the camera tunable filter, the second lead electrically isolated from the illuminator tunable filter for coincidently applying different voltages to the illuminator tunable filter and camera tunable filter.

18. The imaging arrangement of claim 10, wherein the imaging device is configured to:

tune the illuminator tunable filter to the first illuminator bandpass;

tune the camera illuminator tunable filter to the first camera bandpass;

excite a fluorophore using light from within the first illuminator bandpass; and

image an article containing the fluorophore using light within the first camera bandpass.

14. An imaging method, comprising:

at an imaging device having a camera and an illuminator positioned and configured to illuminate an article through an illuminator tunable filter disposed along an optical axis and capture an image of the article through a camera tunable filter arranged along the optical axis, wherein the imaging device does not have a dichroic mirror,

tuning the illuminator tunable filter to a first illuminator bandpass;

tuning the camera illuminator tunable filter to a first camera bandpass;

exciting a fluorophore using light from within first illuminator bandpass; and

imaging an article containing the fluorophore using light within the first camera bandpass;

further comprising arranging the illuminator and the camera tunable filters to be coplanar.

15. The imaging method as recited in claim 14, further comprising:

tuning the illuminator tunable filter to a second illuminator bandpass without optically uncoupling the illuminator tunable filter from the optical axis; and

imaging the article containing the fluorophore using light within the first camera bandpass.

16. The imaging method as recited in claim 14, further comprising:

tuning the camera tunable filter to a second camera bandpass without optically uncoupling the camera tunable filter from the optical axis; and

imaging the article containing the fluorophore using light within the second camera bandpass.

17. The imaging method as recited in claim 14, further comprising:

tuning the illuminator tunable filter to a second illuminator bandpass without optically uncoupling the illuminator tunable filter from the optical axis;

tuning the camera tunable filter to a second camera bandpass without optically uncoupling the camera tunable filter from the optical axis; and

imaging the article containing the fluorophore using light within the second camera bandpass.