Abstract: An apparatus includes a glass element, a fluid, an illumination source, and an ultrasound emitter. The glass element is immersed in the fluid. The illumination source emits light. The ultrasound emitter is configured to direct an ultrasonic signal through the fluid to the glass element. The glass element is configured to reflect the ultrasonic signal along a substantially similar path as an optical path that the light propagates along.

Abstract: Coherent light (e.g., laser light) is emitted into a tissue sample through an optical fiber. The tissue sample diffuses the coherent light. Different blood flow quantities generate different coherent light interference patterns. An image of a coherent light interference pattern is captured with an image sensor coupled to an optical fiber. The speckle contrast of the image quantifies coherent light interference pattern. The speckle contrast is determined and is mapped to blood flow quantities using one or more data models. A quantity of blood flow is identified in a tissue sample at least partially based on the speckle contrast value of the captured image.

Abstract: An ultrasound emitter launches an ultrasonic signal into a diffuse medium such as tissue. The diffuse medium is illuminated with an infrared illumination signal. activating an ultrasound emitter to launch an ultrasonic signal into a diffuse medium. An infrared reference beam is interfered with an infrared exit signal having an infrared wavelength that is the same as the infrared illumination signal. An infrared image is captured of the interference of the infrared reference beam with the infrared exit signal.

Abstract: A laser device includes a seed laser, a plurality of optical amplifiers, and an optical distribution assembly. The seed laser is configured to emit seed laser light. The plurality of optical amplifiers is configured to generate amplified laser light by amplifying the seed laser light. The optical distribution assembly is configured to distribute the seed laser light to an input of each of the optical amplifiers in the plurality and each of the optical amplifiers is configured to direct its respective amplified laser light to a common target.

Abstract: Laser light is emitted from a laser into a scattering layer. An ultrasound signal is emitted into a sample. A signal is generated with a light detector in response to a measurement beam of laser light exiting the light scattering layer into the light detector. At least a portion of the measurement beam formed between the laser and the light detector is wavelength-shifted by the ultrasound signal subsequent to the ultrasound signal propagating through the sample.

Abstract: An infrared imaging signal is generated to illuminate tissue. An infrared image of an exit signal of the infrared imaging signal is captured. The infrared imaging signal is within a frequency band.

Abstract: An enclosure permits ingress of an infrared light beam and ultrasonic signal entering the enclosure from two different locations and facilitates their exit from the enclosure along a substantially similar egress path. The enclosure contains fluid which propagates the ultrasonic wave and a glass element which reflects the ultrasonic wave from its ingress direction onto an egress path. The fluid is an index matching fluid having a refractive index the same as the refractive index of the glass element, rendering the glass element transparent to the infrared light beam. Thus, the infrared light beam, having been induced into the enclosure on an entry path directed through the glass element, passes through the glass element without being reflected or refracted by it, placing the infrared light beam on a substantially similar path to that of the ultrasonic wave for egress of both waves from the enclosure at substantially the same point.

Abstract: A system or device includes a member structure, a plurality of flexible members, and a plurality of tips disposed at ends of the flexible members. The member structure includes an ultrasonic emitter configured to emit an ultrasonic imaging signal. The plurality of flexible members are coupled to the member structure. The plurality of tips are disposed at ends of the flexible members. At least one tip of the plurality of tips includes an image sensor configured to receive an infrared exit signal.

Abstract: A first signal is generated with a first light detector in response to an ultrasound signal encountering a first measurement beam. A second signal is generated with a second light detector in response to the ultrasound signal encountering a second measurement beam. The second measurement beam propagates through the sample and the first measurement beam propagates outside the sample.

Abstract: An image pixel array captures and infrared image of an interference between an imaging signal and a reference wavefront. A display pixel array generates an infrared holographic imaging signal and the image pixel array receives the infrared imaging signal through the display pixel array.

Abstract: A refractive component includes at least one reflection surface and at least one diffractive optical element. The refractive component is configured to receive a light beam and the light beam expands within the refractive component and is reflected by the at least one reflection surface. The diffractive optical element is configured to receive the light beam reflected from the at least one reflection surface, collimate the light beam, and redirect the light beam out of the refractive component.

Abstract: A device includes a sensor, a coherent infrared illumination source and optics to direct an infrared reference beam to the sensor. The sensor is positioned to capture an image of an interference signal generated by an interference of the infrared reference beam and a wavelength-shifted exit signal. The wavelength-shifted exit signal propagates through the optics before interfering with the infrared reference beam.

Abstract: A first wavelength-shifted exit signal is interfered with a first reference beam and a second wavelength-shifted exit signal is interfered with a second reference beam. The first wavelength-shifted exit signal and the second wavelength-shifted exit signal have different wavelengths. A first and second interference pattern are captured by an image sensor in a single image capture. The first reference beam is incident on the image sensor at a first reference angle and the second reference beam is incident on the image sensor at a second reference angle different from the first reference angle.

Abstract: A light pulse is emitted from a light source for illuminating a medium. Energy level data of the light pulse is measured before the light pulse enters the medium. An image sensor captures an image that includes an interference pattern generated by an exit signal of the light pulse exiting the medium interfering with a reference wavefront. Normalized intensity data is generated by normalizing intensity data exit signal data by the energy level data.

Abstract: An imaging system includes an infrared illuminator, an ultrasonic emitter, a reference wavefront generator, and an image pixel array. The infrared illuminator emits a general illumination emission into a three-dimensional diffuse medium, where a portion of the general illumination emission encounters a voxel within the diffuse medium. The ultrasonic emitter focuses an ultrasonic signal to the voxel to wavelength-shift the portion of the general illumination emission to generate a shifted infrared imaging signal. The reference wavefront generator generates an infrared reference wavefront having a same wavelength as the shifted infrared imaging signal. The image pixel array captures an infrared image of an interference between the shifted infrared imaging signal and the infrared reference wavefront.

Abstract: An infrared imaging signal is generated. An image of an exit signal of the infrared imaging signal is captured. The infrared imaging signal is within a frequency band.

Abstract: An infrared image is captured by an image sensor and a frequency domain infrared image is generated by performing a Fourier transform operation on the infrared image. A filtered frequency domain infrared image is generated by applying a mask to the frequency domain infrared image. A spatial domain infrared image is generated by performing an inverse Fourier transform on the filtered frequency domain infrared image. Phase data is extracted from the spatial domain infrared image and a holographic pattern generated from the phase data is driven onto a display.

Abstract: An imaging device includes an image pixel array and a display pixel array. The image pixel array is configured to capture an infrared image of an interference between an infrared imaging signal and an infrared reference wavefront. The display pixel array is configured to generate an infrared holographic imaging signal according to a holographic pattern driven onto the display pixels. The holographic pattern is derived from the infrared image captured by the image pixel array.

Abstract: A co-located imaging and display pixel includes an image pixel having a photosensitive element and a display pixel co-located with the image pixel. An optical transformation engine is coupled between the image pixel and the display pixel. The optical transformation engine is configured to modulate an amplitude of display light emitted by the display pixel in response to receiving an imaging signal generated by the photosensitive element of the image pixel.

Abstract: An infrared image is captured while an infrared reference wavefront and an infrared imaging signal are incident on an image pixel array. A frequency domain infrared image is generated by performing a transform operation on the infrared image. A filtered frequency domain infrared image is generated by applying a mask to the frequency domain infrared image to isolate a frequency representing the interference between the infrared reference beam and the incoming infrared image signal. Intensity data is generated from the filtered frequency domain infrared image. The intensity data is incorporated as a voxel value in a composite image.