269 results about "Lenslet" patented technology

Method and apparatus for a fast (low F/number) computational camera that incorporates two arrays of lenses. The arrays include a lenslet array in front of a photosensor and an objective lens array of two or more lenses. Each lens in the objective lens array captures light from a subject. Each lenslet in the lenslet array captures light from each objective lens and separates the captured light to project microimages corresponding to the objective lenses on a region of the photosensor under the lenslet. Thus, a plurality of microimages are projected onto and captured by the photosensor. The captured microimages may be processed in accordance with the geometry of the objective lenses to align the microimages to generate a final image. One or more other algorithms may be applied to the image data in accordance with radiance information captured by the camera, such as automatic refocusing of an out-of-focus image.

A focus detection device includes an image sensor and a plurality of lenslets. Each of the plurality of lenslets has a distinct conjugate length and is associated with a distinct portion of the image sensor.

A means of enabling an imaging lens system that overcomes some of the costs and disadvantages of the prior art is disclosed. A lens system in accordance with the present invention reduces or eliminates one or more aberrations of an optical input by separating image collection functionality from image processing functionality. As a result, each function can be performed without compromising the other function. An embodiment of the present invention comprises a collection optic that provides a first optical field, based on light from a scene, to a processing optic that comprises a plurality of lenslets. The processing optic tiles the first optical field into a plurality of second optical fields. Each lenslet receives a different one of the plurality of second optical fields, reduces at least one localized aberration in its received second optical field, and provides the corrected optical field to a different one of plurality of photodetectors whose collective output is used to form a spatially correlated sub-image of that corrected optical field. The sub-images are readily combined into a spatially correlated image of the scene.

A MEMS optical display system includes an illumination source for providing illumination light, a collimating lens for receiving the illumination light and forming from it collimated illumination light, and a converging microlens array having an array of lenslets that converge the collimated illumination light. The converging microlens array directs the illumination light to a microelectrical mechanical system (MEMS) optical modulator. The MEMS optical modulator includes, for example, a planar substrate through which multiple pixel apertures extend and multiple MEMS actuators that support and selectively position MEMS shutters over the apertures. A MEMS actuator and MEMS shutter, together with a corresponding aperture, correspond to pixel. The light from the converging microlens array is focused through the apertures and is selectively modulated according to the positioning of the MEMS shutters by the MEMS actuators, thereby to impart image information on the illumination light. The light is then passed to a diffused transmissive display screen by a projection microlens array.

A method of and apparatus for improving vision and the resolution of retinal images is described in which a point source produced on the retina of a living eye by a laser beam is reflected from the retina and received at a lenslet array of a Hartmann-Shack wavefront sensor such that each of the lenslets in the lenslet array forms an aerial image of the retinal point source on a CCD camera located adjacent to the lenslet array. The output signal from the CCD camera is acquired by a computer which processes the signal and produces a correction signal which may be used to control a compensating optical or wavefront compensation device such as a deformable mirror. It may also be used to fabricate a contact lens or intraocular lens, or to guide a surgical procedure to correct the aberrations of the eye. Any of these methods could correct aberrations beyond defocus and astigmatism, allowing improved vision and improved imaging of the inside of the eye.

A micro-lens array with a precisely aligned aperture mask, and a method of forming the same, is provided. The aperture mask is formed by projecting light onto a mask layer using each lenslet in the micro-lens array. The intensity of the light and the mask layer material are chosen so that the light forms apertures in the mask layer via a non-ablative process. The resulting apertures are automatically aligned with their respective lenslets.

A wide angle directed reflector is disclosed. The directed reflector includes a lenticular layer including at least one array of lenslets, each of which having a focal length, The directed reflector further includes a reflective layer which is disposed relative to the lenticular layer. The lenticular layer and the reflective layer are constructed, designed and relatively disposed such that light incident at an angle of incidence on the lenticular layer is reflected by the reflective layer and redirected through the lenticular layer at a substantially constant angle relative to the angle of incidence.

A rectenna structure comprising a flexible, dielectric sheet of material; a plurality of metallic lenslets disposed on the sheet of material; and a plurality of diodes disposed on the sheet of material, each diode in said plurality of diodes being arranged at a focus of a corresponding one of said plurality of metallic lenslets.

A light field microscope incorporating a lenslet array at or near the rear aperture of the objective lens. The microscope objective lens may be supplemented with an array of low power lenslets which may be located at or near the rear aperture of the objective lens, and which slightly modify the objective lens. The result is a new type of objective lens, or an addition to existing objective lenses. The lenslet array may include, for example, 9 to 100 lenslets (small, low-power lenses with long focal lengths) that generate a corresponding number of real images. Each lenslet creates a real image on the image plane, and each image corresponds to a different viewpoint or direction of the specimen. Angular information is recorded in relations or differences among the captured real images. To retrieve this angular information, one or more of various dense correspondence techniques may be used.

A detection apparatus includes a multilocation sensor. The apparatus includes a sheet in communication with the sensor, which when a plurality of locations of the sheet are simultaneously activated, the sensor senses these locations, simultaneously. Alternatively, the apparatus includes a surface. The apparatus includes a sensor in communication with the surface that detects variable pressure regarding a touch on the surface. Alternatively, the apparatus includes a sensor in communication with the surface that is capable of detecting a touch on a surface and also a presence of an object near the surface but not touching the surface. Alternatively, the apparatus includes a lenslet array where the lenslets are diffractive. The apparatus includes a sensor for determining where the array is being touched. The sensor includes a first light source producing light at a first frequency, a second light source producing light at a second frequency, a camera which records images from the frequencies of light from the array, and a computer which determines where the surface is being touched from the images. Alternatively, the apparatus includes a sensor for determining where the surface is being touched, including a plurality of cameras that take images of the surface, a first array of lights positioned such that light from the first array is on a vertical line with one or more of the cameras, a second array of lights that are positioned such that light from the second array is on a horizontal line with one or more of the cameras and a computer connected to the cameras which determines where the surface is being touched from the images. Alternatively, the apparatus includes a sheet containing a plurality of elements which are at least one of refractive, diffractive, retroreflective, reflective, or focusing. The apparatus includes a sensor which determines where the sheet is touched based on light being one of refracted, diffracted, retroreflected, reflected or focused by the sheet to the sensor. Alternatively, the apparatus includes a sheet having no active components in, on, or adjoining the sheet. The apparatus includes active components separate and apart from the sheet which determine where the sheet is touched. The apparatus can include an autostereo display including a multitouch retroreflective surface and a projector. A method for detection. A software program stored on a computer 5 readable medium.

An assembly is provided that may be used in high data rate optical communications, such as free-space communication systems. The assembly may include a main optical receiver element and a lenslet array or other optical element disposed near the focal plane that collects an optical signal and focuses that signal as a series of optical signal portions onto a photodetector array, formed of a series of InGaAs photodiodes, for example. The electrical signals from the photodetectors may be amplified using high bandwidth transimpedance amplifiers connected to a summing amplifier or circuit that produces a summed electrical signal. Alternatively, the electrical signals may be summed initially and then amplified via a transimpedance amplifier. The assembly may be used in remote optical communication systems, including free-space laser communication environments, to convert optical signals up to or above 1 Gbit/s or higher data rates into electrical signals at 1 Gbit/s or higher data rates.

An optical system for remotely optical communications at a high data rate between a base station and a remote station under atmospheric turbulence conditions is disclosed. The remote station includes an entirely different type of retroreflector that does not use the conventional type of retroreflection, but instead consists of two sets of lenslets coupled with single-mode fiber array, called fiber “retro”. Amplified retromodulation is achieved requiring only one single optical amplifier and one single modulator. A transmitter located at the base station sends an interrogating optical beam to the fiber “retro” which modulates the optical beam according to the input signal/data, and redirects the modulated optical beam to the base station for detection by a receiver. The present invention includes the capabilities of providing Identification of Friend-or-Foe (IFF), secure communication, and a means of achieving a wide field-of-view (FOV) with a fiber-coupled lenselet array.

A collimating sheet, for use with a backlit display and the like, that includes a substrate, a plurality of microlenses on the output side of the substrate, a specularly reflective layer on the side of the substrate opposite the microlenses, and a plurality of apertures in the reflective layer in direct correspondence to the microlenses of the lens array. The specularly reflective layer can be relatively thinner than a diffuse reflective layer, which allows light to pass through the more readily. One or more layers of dielectric can be placed on top of one or more reflective material layers to further improves overall reflectivity. Apertures are preferably made in the light-absorptive and reflective layers with a laser ablation process wherein laser light illuminates the output side of the film. The laser light is brought to a focus by the lenslets of the lens array onto the light-absorptive layer, which then ablates a hole or aperture into the light-absorptive and reflective layer. In this way, the apertures are self-aligned with the lenslets.

Contact lenses incorporating an array of non-coaxial lenslets with add power that create non-coaxial myopic defocus within the optic zone of the lens may be utilized to prevent and/or slow myopia progression. The positive, non-coaxial lenslets cover about twenty to eighty percent of the central pupil area to deliver positive foci of light in front of the retina to slow the rate of myopia progression.

The present invention relates to warm white light engines including combinations of blue, cyan, and red, red-orange, or amber emitters and one or more phosphors that produce a white light pleasing to the human eye through the use of improved color uniformity and improved collimation of light. Specifically, a micro-lenslet array having an optimized surface is used to disperse light from the light emitter; an innercollimation lens having an optimized cross-sectional shape and micro-ridges is used to disperse light; a TIR reflector having an optimized cross-sectional shape and micro-ridges is used to disperse and redistribute phase as well as provide collimation; and a final micro-lenslet layer includes optimized lenslet design placement and randomization factor to homogenize light to produce a uniform warm white light.

An apposition microoptical compound lens comprises a plurality of lenslets arrayed around a segment of a hollow, three-dimensional optical shell. The lenslets collect light from an object and focus the light rays onto the concentric, curved front surface of a coherent fiber bundle. The fiber bundle transports the light rays to a planar detector, forming a plurality of sub-images that can be reconstructed as a full image. The microoptical compound lens can have a small size (millimeters), wide field of view (up to 180°), and adequate resolution for object recognition and tracking.

A luminaire and a method of operating a luminaire is provided. The luminaire includes a light source emitting a plurality of light rays. A collimation device is arranged to receive a portion of light from the light source and transmits the portion of light through an exit aperture towards an illuminated area. The exit aperture includes a planar portion and at least one lenslet formed thereon. The lenslet is arranged having a first profile and a second profile, where the portion of light is refracted on a plurality of angles to form a twisted profile by the lenslet.

An apparatus to acquire information about light-field data includes: a beam splitter configured to split light, through a lens unit which is connected to the apparatus, from an object into a first light beam and a second light beam; an image sensor configured to detect the first light beam to form an image of the object; and a light-field sensor, including a lenslet array and a detecting unit to detect the second light beam through the lenslet array, configured to acquire information about the light-field data, the lenslet array including a plurality of lenslets, wherein a first position where the detecting unit is provided is conjugate to a second position of a pupil of the lens unit.

An illumination system for illuminating an object includes a light source and a lens array system. The light source includes an illumination element emitting light rays and surrounded by a parabolic reflector. The lens array system includes a first lens array plate and a second lens array plate. The first lens array plate includes a matrix of lenslets where, in one embodiment, each lenslet has a shape matching the aspect ratio of the object to be illuminated. The second lens array plate includes a radial pattern of wedge shaped lenslets each corresponding to a lenslet in the first lens array plate. Each wedge shaped lenslet in the second lens array plate has dimensions that are selected to provide a radial and theta collection angles matching the maximum divergence angle of the light source and the maximum divergence angles of the corresponding lenslet in the first lens array plate.

A rectenna structure comprising a flexible, dielectric sheet of material; a plurality of metallic lenslets disposed on the sheet of material; and a plurality of diodes disposed on the sheet of material, each diode in said plurality of diodes being arranged at a focus of a corresponding one of said plurality of metallic lenslets.

A polarizing conversion system uses a polarizing beam splitter and reflector with a polarization conversion element to convert light from a lamp to a selected polarization state before providing the light to a light integrator, such as a light pipe or light tunnel. The light integrator provides homogenized polarized light to a light modulator. The polarization conversion system avoids increases efficiency compared to absorptive or simple reflective polarizers with fewer components than polarization conversion systems using patterned retarder plates and lenslet arrays. In one embodiment, the conversion elements are held to avoid adhesive or other bonds in the optical path. In other embodiments, high-temperature optical adhesive or optical contact bonding is used to assemble optical components for high-temperature operation. In a particular embodiment, a single-crystal quartz retarder plate is thermally matched to glass components in the polarization conversion system.

A portable device includes a transparent surface; a microlens array having lenslets, each lenslet forming a corresponding image of an object using light received through the transparent surface; a light sensor having pixels, each pixel corresponding uniquely to one of the plurality of lenslets, to detect the formed images of the object; and a controller to use the detected images to determine a motion of the object relative to the transparent surface, and to output the detected motion to a display for use in navigating a cursor and/or a menu on the display according to the determined motion. The portable device can be used in a telephone, personal digital assistant, and/or other handheld devices which control navigation on a display included in the device or external to the device.