Hybrid Telescope for Optical Beam Delivery and Related Systems and Methods
First Claim
1. An optical coherence tomography (OCT) imaging system comprising:
- a source of broadband optical radiation coupled to a sample arm of the OCT imaging system;
a beam shaping optical assembly in the sample arm of the OCT imaging system, the beam shaping optical assembly being configured to receive optical radiation from the source as a beam of optical radiation and to shape the spatial profile of the beam of optical radiation;
a scan mirror assembly coupled to the beam shaping optical assembly in the sample arm of the OCT system;
wherein the beam shaping optical assembly comprises a lens assembly configured to;
change a numerical aperture (NA) of the OCT system without changing a focus of the OCT system;
to change a focus of the OCT system without changing a NA of the system;
orto change both the NA and the focus of the OCT system responsive to a control input; and
an objective lens assembly coupled to the beam shaping optical assembly.
1 Assignment
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Accused Products
Abstract
Optical coherence tomography (OCT) imaging systems are provided including a source of broadband optical radiation coupled to a sample arm of the OCT imaging system; a beam shaping optical assembly in the sample arm, the beam shaping optical assembly being configured to receive optical radiation from the source as a beam of optical radiation and to shape the spatial profile of the beam of optical radiation; a scan mirror assembly coupled to the beam shaping optical assembly; and objective lens assembly coupled to the beam shaping optical assembly. The beam shaping optical assembly includes a lens assembly configured to change a NA of the OCT system without changing a focus; to change a focus of the OCT system without changing a NA of the system; or to change both the NA and the focus of the OCT system responsive to a control input.
5 Citations
21 Claims
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1. An optical coherence tomography (OCT) imaging system comprising:
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a source of broadband optical radiation coupled to a sample arm of the OCT imaging system; a beam shaping optical assembly in the sample arm of the OCT imaging system, the beam shaping optical assembly being configured to receive optical radiation from the source as a beam of optical radiation and to shape the spatial profile of the beam of optical radiation; a scan mirror assembly coupled to the beam shaping optical assembly in the sample arm of the OCT system; wherein the beam shaping optical assembly comprises a lens assembly configured to; change a numerical aperture (NA) of the OCT system without changing a focus of the OCT system; to change a focus of the OCT system without changing a NA of the system;
orto change both the NA and the focus of the OCT system responsive to a control input; and an objective lens assembly coupled to the beam shaping optical assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An optical scanning beam system comprising:
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a collimator configured to receive an optical fiber couple to a source of the system; a scan mirror assembly coupled to the collimator of the system; and a focal assembly preceding the scan mirror assembly of the system between the collimator and the scan mirror assembly, wherein the focal assembly is configured to change a numerical aperture (NA) of the system, a focus of the system or both the NA and the focus responsive to a control input. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A controller for an optical coherence tomography (OCT) imaging system, the imaging system comprising a collimator in a sample arm of the OCT configured to receive an optical fiber couple to a source of the OCT system, a scan mirror assembly coupled to the collimator in the sample arm of the OCT system a hybrid telescope preceding the scan mirror assembly in the sample arm of the OCT system between the collimator and the scan mirror assembly, the controller comprising:
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a means for controlling two or more lenses of the hybrid telescope, wherein the HT comprises; a first positive lens following the collimator; a second, movable, negative lens following the first positive lens; and a third, moveable, positive lens following the second movable, negative lens and preceding the scan mirror assembly, wherein the means for controlling comprises means for controlling the second, movable, negative lens, the third moveable, positive lens or both to change a numerical aperture (NA) of the system, a focus of the system or both the NA and the focus responsive to a control input of the controller.
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20. A method for operating a scanning beam system, the method comprising:
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setting a hybrid telescope (HT) to a long focal length and a low numerical aperture (NA) upon entry into a region of interest in a sample; identifying a structure of interest within the region of interest of the sample; increasing the NA, reducing a depth of field and increasing brightness of a focal plane; and varying a focal length such that the focal length matches a working distance of a tool associated with the scanning beam system.
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21. An optical scanning beam system comprising:
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an input source of optical radiation configured to transmit an optical beam having an initial beam diameter and a beam divergence; a beam conditioning assembly having an input configured to receive the optical radiation from the input source, a means for altering the beam diameter and the beam divergence, and an output configured to direct the optical radiation to a means for steering a beam of optical radiation along at least one direction orthogonal to a direction of beam propagation; a means for directing the steered beam of optical radiation to a region of interest associated with a subject; a means for collecting at least a portion of the optical radiation that scattered from or transmitted through the region of interest; a means for detecting the collected optical radiation; a means for processing the detected optical radiation to produce an image derived from an attribute of the region of interest responsive to an interaction of the beam of optical radiation with the subject; a controller in communication with the beam conditioning assembly configured to control at least two motional degrees of freedom of the beam conditioning assembly, wherein the controller is configured to set the optical scanning beam system to one of a multiplicity of prescribed focus positions at fixed system numerical aperture and to set the optical scanning beam system to one of a multiplicity of prescribed numerical apertures at a fixed focal position.
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Specification