An optical coherence tomography device includes a light source, a mirror device including a movable mirror configured to perform a reciprocating operation, a support part configured to support an object, a beam splitter configured to generate interfering light, an optical sensor configured to detect the interfering light, and a control unit. Each of the plurality of pixels included in the optical sensor includes a light receiving part, a plurality of transfer gates, and a discharge gate. The control unit applies an electric signal to the optical sensor so that the plurality of transfer gates are sequentially brought into a charge transfer state in at least three time ranges separated from each other and the discharge gate is brought into a charge discharge state in a time range other than the at least three time ranges for each period of an interferogram signal of the interfering light.

The technology disclosed in this patent document can be used to implement an optical coherent tomography (OCT) system that combines a control of the probe light to the target sample with different optical aberration patterns in optically probing the target sample and an OCT imaging processing to enhance the OCT imaging quality by combining image signals from in-phase contributions from the probing with different optical aberration patterns while suppressing randomly phased contributions from scattering by the target sample.

Various embodiments may provide an optical system. The optical system may include a laser source configured to emit a pump beam. The optical system may also include a non-linear medium configured to generate, based on the pump beam, an idler beam configured to incident on the sample and configured to be reflected, and a signal beam. The optical system may further include a mirror configured to reflect the signal beam so that the reflected signal beam interacts with the reflected idler beam in the non-linear medium to generate a resultant signal beam that carries an interference pattern. The optical system may additionally include a detector configured to receive the resultant signal beam for imaging the sample. The optical system may also include one or more optical elements configured to direct the idler beam from the non-linear medium to the sample, and the signal beam from the non-linear medium to the mirror.

An interference image acquisition apparatus includes a light source, a beam splitter, a second reflection mirror, an imager, and a first reflection mirror. A cell is placed on one side of a transparent material, and the first reflection mirror is placed on the other side of the transparent material. In a two-beam interferometer, an optical path difference between an optical path length of a first light beam reflected by the first reflection mirror and an optical path length of a second light beam reflected by the second reflection mirror is set to a coherence length of light output from the light source or less. The imager acquires an interference image in a state in which the cell is placed at a position conjugate to an imaging plane in a first optical system between the imaging plane and the first reflection mirror.

A low-coherence interferometry imaging system for imaging translucent samples, wherein the system includes an optical coherence microscopy (OCM) mode and an optical coherence tomography (OCT) mode, and wherein the system can selectively employ either mode without requiring re-positioning of a sample under test. The system provides for the selective disposition of the OCM mode or the OCT mode in an optical path intermediate a scanning system and an imaging objective.

An OCT examination device for recording an object comprises an OCT radiation source which emits OCT radiation, an OCT beam path, a housing, an exit opening formed in the housing for the OCT radiation of the OCT radiation source, an OCT exit direction of the radiation through the exit opening, a control unit connected to the OCT radiation source OCT radiation and configured to record a multiplicity of measurement profiles mutually separated in a recording period and, within the recording period, to drive the OCT radiation source in order to emit the OCT radiation and the OCT radiation receiver in order to receive the backscattered OCT radiation, and to keep an OCT output direction and an OCT exit direction constant with respect to one another in their angular orientation during the recording period.

A simultaneous phase-shift point diffraction interferometer and method for detecting wave aberration. The interferometer comprises an ideal spherical wave generation module, an optical system to be measured, an image plane mask, a polarization phase shift module, a two-dimensional polarization imaging photodetector and a data processing unit. Single photodetector is adopted to realize simultaneous detection of more than three phase shift interference patterns, and has the advantages that environmental interference suppression, a flexible optical path, high measurement accuracy, and calibration of system errors of the interferometer may be realized.

A low-coherence Fizeau interferometer includes a first beamsplitter, a test arm and a reference arm, the first beamsplitter splits light into a first portion of light directed to the test arm and a second portion of light directed to the reference arm, and an imaging arm comprising a first collimating lens, a flat reference surface, and a test element. The test arm focuses the first portion of light at a first focal point, such that a virtual image of the first focal point appears at a focal point of the test element. The reference arm focuses the second portion of light at a second focal point, the first collimating lens collimates the light that then reflects off the flat reference surface. The second beamsplitter directs the first portion of light to reflect off the test element. The reflection of the first and second portion of light form an interference pattern.

Disclosed are devices and techniques based on optical coherence tomography (OCT) technology in combination with optical actuation. A system for providing optical actuation and optical sensing can include an optical coherence tomography (OCT) device that performs optical imaging of a sample based on optical interferometry from an optical sampling beam interacting with an optical sample and an optical reference beam; an OCT light source to provide an OCT imaging beam into the OCT device which splits the OCT imaging beam into the optical sampling beam and the optical reference beam; and a light source that produces an optical actuation beam that is coupled along with the optical sampling beam to be directed to the sample to actuate particles or structures in the sample so that the optical imaging captures information of the sample under the optical actuation.

A method for determining thickness of layers of the tear film includes reconstructing a full- or hyper-spectral interference pattern from an imaged multi-spectral pattern. Tear film thickness can then be estimated from the full- or hyper-spectral interference pattern. Using a full- or hyper-spectral interference pattern provides a greater number of frequency sampling points for increased tear film thickness estimation accuracy, without traditional time consuming techniques.