公开(公告)号：US10801829B2

公开(公告)日：2020-10-13

申请号：US16179743

申请日：2018-11-02

Applicant: AMO Development, LLC

Inventor： Thomas D. Raymond ,  Isaac Neal ,  Daniel R. Hamrick ,  Thomas M. Shay

IPC: G01B9/02 ,  A61B3/10 ,  A61B3/00

Abstract: Swept source optical coherence tomography (SS-OCT) systems and methods may employ down-conversion. Down-converter systems and methods may utilize a distribution element and a frequency down shifter. The distribution element may receive an output signal of a photo detection device, the output signal comprising a first frequency component at or below a maximum conversion frequency and a second frequency component above the maximum conversion frequency. The distribution element may send the first frequency component to an analog to digital (A/D) converter and send the second frequency component to a frequency down shifter. The frequency down shifter may down shift the second frequency component to a frequency at or below the maximum conversion frequency to form a down shifted second frequency component. The frequency down shifter may send the down shifted second frequency component to the A/D converter.

公开(公告)号：US10849495B2

公开(公告)日：2020-12-01

申请号：US16148950

申请日：2018-10-01

Applicant: AMO Development, LLC

Inventor： Paul Pulaski ,  Daniel R. Neal ,  Thomas D. Raymond ,  Stephen W. Farrer ,  Daniel R. Hamrick ,  Richard J. Copland

IPC: A61B3/10 ,  A61B3/00 ,  G02B6/12

Abstract: An optical coherence tomography (OCT) system includes: a light source; a multi-focal delay line; and a light detector. The multi-focal delay line includes: a positive lens; and an optical switch configured to: receive a light from the light source; selectively direct the sample light to the positive lens via a selected one of a plurality of light interfaces each located a different distance from the focal plane of the positive lens; and direct the sample light to an object to be measured. The light detector is configured to receive return light returned from the object to be measured in response to the sample light, and to receive a reference light produced from the light from the light source, and in response thereto to detect at least one interference signal. An associated OCT method may be performed with the OCT system.