A laser beam delivery apparatus for a microscope comprises first and second optical diffusers that are configured to move in a periodic manner with a respective different frequency. Each optical diffuser may comprise a spinning disk. The laser light is spatially randomized by the first spinning diffuser and its spatial pattern is further randomized by the second diffuser. The second diffuser prevents any spatial pattern from repeating after one revolution of the first diffuser, which prevents beating patterns from forming when the light is imaged through a spinning confocal disk and increases the uniformity in other cases.

A method of processing by controlling one or more beam characteristics of an optical beam may include: launching the optical beam into a first length of fiber having a first refractive-index profile (RIP); coupling the optical beam from the first length of fiber into a second length of fiber having a second RIP and one or more confinement regions; modifying the one or more beam characteristics of the optical beam in the first length of fiber, in the second length of fiber, or in the first and second lengths of fiber; confining the modified one or more beam characteristics of the optical beam within the one or more confinement regions of the second length of fiber; and/or generating an output beam, having the modified one or more beam characteristics of the optical beam, from the second length of fiber. The first RIP may differ from the second RIP.

A light emitting device and an image capturing device using the light emitting device. The light emitting device includes a light emitting element, a digital micro mirror (DMD), a reflecting prism, and a housing. The light from the light emitting element is modulated by the DMD into structured light. The reflecting prism is on an optical path of the source light. The reflecting prism guides the source light to the DMD. The housing defines a receiving cavity. The light emitting element, the reflecting prism, and the DMD are received in the receiving cavity. The housing defines a light exit opening, the structured light exits from the light exit opening.

A light source apparatus includes a plurality of laser light sources configured to emit color light rays having multiple wavelength bands. The light source apparatus further includes a plurality of dichroic mirrors configured to combine the color light rays and output combined color light rays; and a dynamic diffusion plate configured to diffuse incident light rays from the plurality of dichroic mirrors so as to remove speckles specific to laser beams. One of the plurality of dichroic mirrors is configured to reflect blue light, and each of the plurality of laser light sources includes a blue laser light source. The blue laser light source is configured to generate a P-polarized short-wavelength-band laser beam, and an S-polarized long-wavelength-band laser beam having a wavelength longer than a wavelength of the P-polarized short-wavelength-band laser beam.

Disclosed herein are methods, apparatus, and systems for providing an optical beam delivery system, comprising an optical fiber including a first length of fiber comprising a first RIP formed to enable, at least in part, modification of one or more beam characteristics of an optical beam by a perturbation assembly arranged to modify the one or more beam characteristics, the perturbation assembly coupled to the first length of fiber or integral with the first length of fiber, or a combination thereof and a second length of fiber coupled to the first length of fiber and having a second RIP formed to preserve at least a portion of the one or more beam characteristics of the optical beam modified by the perturbation assembly within one or more first confinement regions. The optical beam delivery system may include an optical system coupled to the second length of fiber including one or more free-space optics configured to receive and transmit an optical beam comprising the modified one or more beam characteristics.

A method of processing by controlling one or more beam characteristics of an optical beam may include: launching the optical beam into a first length of fiber having a first refractive-index profile (RIP); coupling the optical beam from the first length of fiber into a second length of fiber having a second RIP and one or more confinement regions; modifying the one or more beam characteristics of the optical beam in the first length of fiber, in the second length of fiber, or in the first and second lengths of fiber; confining the modified one or more beam characteristics of the optical beam within the one or more confinement regions of the second length of fiber; and/or generating an output beam, having the modified one or more beam characteristics of the optical beam, from the second length of fiber. The first RIP may differ from the second RIP.

A depth camera assembly (DCA) includes a structured light generator, an imaging device and a controller. The structured light generator illuminates a local area with a structured light pattern in accordance with emission instructions from the controller. The structured light generator comprises an illumination source, an acousto-optic device, and a projection assembly. The acousto-optic device generates a structured light pattern from an optical beam emitted from the illumination source. The projection assembly modifies a general intensity envelope of the structured light pattern in order for the structured light pattern to illuminate a larger section of the local area, and projects the modified structured light pattern into the local area. The imaging device captures of portions of the structured light pattern scattered or reflected from the local area. The controller determines depth information for the local area based at least in part on the captured images.

A laser projector includes a laser assembly, a beam combination mirror group and a phase delaying component. The laser assembly includes a red laser light emitting region, a blue laser light emitting region and a green laser light emitting region. Red laser light is polarized in a first direction, green laser light is polarized in a second direction, and blue laser light is polarized in a third direction. The beam combination mirror group combines the red laser light, the blue laser light and the green laser light. The phase delaying component is on a light emitting path of at least one of the red laser light, the blue laser light the green laser light, and changes a polarization direction of the at least one of the red laser light, the blue laser light or the green laser light before being output by the beam combination mirror group.

An illumination system includes at least first and second laser illumination sources. A down converter material emits light when illuminated by one or more of the laser illumination sources. The first laser illumination source is arranged to illuminate only a first portion of the down converter material. The second laser illumination source is arranged to illuminate only a second portion of the down converter material. Control circuitry causes the first laser illumination source to adaptively vary a first intensity of illuminating the first portion of the down converter material, causes the second laser illumination source to adaptively vary a second intensity of illuminating the second portion of the down converter material, and causes the light modulator to allow a selected amount of the down converter material's emitted light to be projected from the system.

A control method for a spatial light modulator for an exposure apparatus having a projection optical system having an optical elements a state of each of which is allowed to be changed, the method sets states of optical elements located in a first area to a first distribution in which a first optical element in a first state and a second optical element in a second state are distributed in a first distribution pattern so that one portion of a light from the optical elements located in the first area enters the projection optical system and setting states of optical elements located in a second area to a second distribution in which the first optical element and the second optical element are distributed in a second distribution pattern to reduce a deterioration of the pattern image caused by a light that enters the projection optical system from the first area.