Abstract: Methods for visualizing oral biofilm growth and methods for identifying compounds that modulate biofilm growth are provided. Biofilm samples are stained with fluorescent dyes and viewed with a confocal laser scanning microscope. Biofilm samples are in a container with a cover slip configured for viewing the biofilm sample with the confocal laser scanning microscope and the coverslip has a thickness variation of 0.02 mm or less.

Abstract: Compound eyes of insects are great optical system for imaging and sensing by the nature creator, which is an unsurpassed challenge due to its precision and small size. Here, we use meta-lens consisting of GaN nano-antenna to open the fascinating doorway to full-color achromatic light field imaging and sensing. A 60×60 multi-channels meta-lens array is used for effectively capturing multi-dimensional optical information including image and depth. Based on this, the multi-dimensional light field imaging and sensing of a moving object is capable to be experimentally implemented. Our system presents a diffraction-limit resolution of 1.95 micrometer via observing the standard resolution test chart under white light illumination. This is the first mimic optical light field imaging and sensing system of insect compound eye, which has potential applications in micro robotic vision, non-men vehicle sensing, virtual and augmented reality, etc.

Abstract: A helmet accessory mount system may include a shroud configured to be coupled to a helmet and an arm assembly having a first arm configured to rotatably couple to the shroud. The system may also include an accessory interface configured to coupled to an accessory and configured to engage the arm assembly. The arm assembly may be configured to move from a deployed position to at least one storage position. The accessory may be configured to be positioned between the accessory interface and the helmet when the arm assembly is in the at least one storage position.

Abstract: A system, method, and device for configuring an optical aiming device for ballistic drop compensation (BDC). The optical aiming device can include a housing with a reticle pane defining a reticle display field viewable by a user and indicating a zero point, the housing further including a plurality of axially spaced lenses and defining an optical path therethrough. In various embodiments the system includes a display device configured to project an image generated from a display, a processor, and a non-transitory computer readable storage medium. The computer readable data storage medium can include instructions executable by the processor to receive a first set of ballistics input data indicating a first type of ammunition, determine a BDC pattern including at least two holdover marks corresponding to at least two ranges for the first type of ammunition, and project the BDC pattern onto the reticle display field.

Abstract: A system for illuminating a microscopy specimen includes an illumination source configured to emit a light that travels along an illumination path to illuminate the microscopy specimen placed on an optical detection path of an optical microscope. The system also includes optical elements in the illumination path and configured to at least in part transform the light from the illumination source into a light sheet illuminating the microscopy specimen. The optical elements include an electronically tunable lens configured to vary a focal distance of the electronically tunable lens to dynamically vary a position of a waist of the light sheet illuminating the microscopy specimen. The optical elements include a deflector configured to vertically move the light sheet to illuminate the microscopy specimen at different horizontal planes.

Abstract: A focusing device includes a substrate and a plurality of scatterers provided at both sides of the substrate. The scatterers on the both sides of the focusing device may correct geometric aberration, and thus, a field of view (FOV) of the focusing device may be widened.

Abstract: A microscope includes an optical imaging system with an adjustable corrector, a microscope drive, a position sensitive detector, an optical measuring system and a control unit. The optical measuring system configured to form first and second measuring light beams, direct the measuring light beams into an entrance pupil of the optical imaging system eccentrically with first and second distances to the optical axis thereof, receive first and second reflection light beams, and direct the reflection light beams onto the position sensitive detector. The control unit is configured to record positions of the reflection light beams on the position sensitive detector, and determine an aberration based on the recorded positions.

Abstract: A head-mountable device can include an optical module that provides a display element that is moveable based on pressure and/or temperature changes within an enclosed chamber. The control mechanisms can directly and/or indirectly alter one or more of the temperature, pressures, and/or volume of the enclosed chamber. As the conditions within the chamber are altered, an extendable member can expand and/or retract to move the display element towards and/or away from a user's eye. The mechanisms for controlling the position of the display element can be actively and/or passively controlled.

Abstract: Provided is a focusing device that includes a substrate and a plurality of scatterers provided at both sides of the substrate. The scatterers on the both sides of the focusing device may correct geometric aberration, and thus, a field of view (FOV) of the focusing device may be widened.

Abstract: A helmet mounting for optical combiner (50) for a HMD has a pivoted mounting arm (60) for the optical combiner to be movable between an operational position in a line of sight, and a retracted position displaced out of the line of sight. A translation mechanism (100) provides translation of the optical combiner along the line of sight. A driving lever (30) causes the displacement of the mounting arm between the line of sight and the retracted position, and with a second motion of the lever, causes the translation of the optical combiner. By having the same lever coupled to both the mounting arm and the translation mechanism, the relatively complex combination of displacement and translation movements of the optical combiner can be reduced to a simpler movement, easier for a user such as a pilot to use even when under stress in a busy and cramped cockpit environment.

Abstract: An optical system includes a first relay rod of a first material, a second relay rod of a second material, different from the first material, and a lens between the first and second relay rods.

Abstract: An automatic focus system for an optical microscope that facilitates faster focusing by using at least two cameras. The first camera can be positioned in a first image forming conjugate plane and receives light from a first illumination source that transmits light in a first wavelength range. The second camera can be positioned at an offset distance from the first image forming conjugate plane and receives light from a second illumination source that transmits light in a second wavelength range.

Abstract: A zoom lens forms an intermediate image at a position conjugate to a reduction side imaging plane and forms the intermediate image again on a magnification side imaging plane. The zoom lens includes a plurality of lens groups including at least two movable lens groups, which move by changing spacings between the groups adjacent to each other in a direction of an optical axis during zooming, at a position closer to the reduction side than the intermediate image. Among the plurality of lens groups, a final lens group closest to the reduction side has a positive refractive power, and remains stationary with respect to the reduction side imaging plane during zooming. The zoom lens satisfies predetermined conditional expressions (1) and (2) about the focal lengths of the movable lens groups.

Abstract: A method and corresponding optical device to correct spherical aberration in an optical path caused by an electrically tunable lens (ETL) within the optical path. The method includes placing within the optical path and in working relationship with the ETL an aspherical correction lens dimensioned and configured to reduce spherical aberration in a light beam exiting the ETL.

Abstract: The present invention provides a glass lens for a lens module. The glass lens includes an optical portion having an optical axis, and an extending portion surrounding a periphery of the optical portion. The optical portion includes an object-side surface and an image-side surface opposite to the object-side surface, and the extending portion includes a first extending surface extending from the object-side surface towards a direction far away from the optical axis and a second extending surface extending from the image-side surface towards the direction far away from the optical axis. The first extending surface and the second extending surface are respectively provided with a first recess and a second recess filled with a black substance, and the second recess is closer to the optical axis with respect to the first recess.

Abstract: A system for illuminating a microscopy specimen includes illumination sources each of which is configured to emit a light that travels along an illumination path to illuminate the microscopy specimen placed on an optical detection path of an optical microscope. The system also includes optical elements in the illumination path of each of the illumination sources. The optical elements are configured to at least in part transform the light from each of the illumination sources into a light sheet illuminating the microscopy specimen and to vary a position of a waist of the light sheet from each of the illumination sources that illuminates the microscopy specimen. The optical elements for each of the illumination sources are configured such that the waist of the light sheet from each of the illumination sources are spatially aligned and illuminate a substantially coincident portion of the microscopy specimen.

Abstract: An imaging system including a light source; a first focusing lens positioned to focus a beam from the light source to a beam waist at a predetermined location along an optical path of the beam in the imaging system; a beam splitter positioned relative to the first focusing lens to receive the beam from the first focusing lens and to create first and second beams; a second focusing lens positioned to receive the first and second beams output by the beam splitter, to focus the received first and second beams to a spot sized dimensioned to fall within a sample to be image, and further positioned to receive first and second beams reflected from the sample; an image sensor positioned to receive the light beams reflected from the sample; and a roof prism positioned in the optical path between the second focusing lens and the image sensor.

Abstract: An optical image lens assembly includes at least one optical lens element which is made of a plastic material and includes at least one short-wavelength light absorbing agent. The short-wavelength light absorbing agent is homogeneously mixed with the plastic material. The optical lens element including the short-wavelength light absorbing agent has refractive power, and at least one of the object-side surface and the image-side surface of the optical lens element including the short-wavelength light absorbing agent is aspheric.

Abstract: A 3D video endoscope has a shaft which has the form of a flexible or rigid elongated hollow body, a first image sensor, a second image sensor, a first optical channel which comprises a first objective lens and a first optical image guiding system which forwards the image captured by the first objective lens to the first image sensor, a second optical channel which comprises a second objective lens and a second optical image guiding system which forwards the image captured by the second objective lens to the second image sensor. The first optical channel and second optical channel are substantially arranged in the shaft. The first optical channel has a first diaphragm which reduces the aperture of the first optical channel compared to the aperture of the second optical channel. Apart from the first diaphragm, the first optical channel and the second optical channel are structured identically.

Abstract: Systems and methods for providing a wider FOV for a telescope system are disclosed. In one embodiment, a telescope includes a primary mirror having an orifice, where an optical path originates from an object positioned in front of the primary mirror and reflects off the primary mirror. A secondary mirror is disposed adjacent to the primary mirror, where the optical path reflects off the secondary mirror and passes through the orifice in the primary mirror. The telescope includes a set of extended field corrector optics disposed along the optical path, the extended field corrector optics positioned to reflect light incident from the secondary mirror, where the set of extended field corrector optics includes two corrector mirrors. A tertiary mirror is disposed along the optical path and adjacent to the extended field corrector optics, the tertiary mirror positioned to reflect the light incident from the extended field corrector optics.

Abstract: An annular optical element assembly having a central axis includes a first annular optical element, a second annular optical element and a light blocking sheet. The first annular optical element includes a first central opening, a first axial connecting structure and a first inner receiving surface. The second annular optical element includes a second central opening, a second axial connecting structure and a second inner receiving surface. The second inner receiving surface surrounds the second central opening, wherein the second inner receiving surface is closer to the central axis than a second axial connecting surface is to the central axis, the second inner receiving surface is vertical to the central axis, and the first inner receiving surface and the second inner receiving surface are corresponding and not connected to each other for defining a receiving space.

Abstract: A relay optical system for a rigid endoscope has two identically formed lens systems which are arranged symmetrically to each other with respect to a plane of symmetry that is perpendicular to the optical axis. The lens systems each comprise a first biconvex lens, a biconcave lens, a rod lens having a convex lens surface facing the plane of symmetry and a concave lens surface facing away from the plane of symmetry, and a second biconvex lens, in this order as viewed from the plane of symmetry.

Abstract: There is provided a display device which has a shutter capable of being accommodated in a compact space and a simplified operation mechanism, and can be reduced in size. The display device of the present invention is characterized by including: a housing having a top plate with an opening and a pair of opposed side plates; a drive member which is provided on at least one of the pair of side plates and slidable relative to the at least one of the side plates, the drive member having a cam structure and a drive rack gear; a display member that is engaged with the cam structure and movable through the opening; and a movable shutter capable of closing the opening along the top plate by a drive transfer unit that is engaged with the drive rack gear.

Abstract: A camera viewfinder comprises an electronic display apparatus that is configured for the display of images that are recorded by an image sensor of an electronic camera. The camera viewfinder further comprises two mirrors for reflecting the images displayed by the display apparatus, of which at least one mirror is a free-form surface mirror whose reflective surface is formed as a free-form surface that does not have any continuous translation symmetry or rotational symmetry. At least one of the free-form surface mirrors is adjustable to at least partially compensate a vision defect of a user.

Abstract: A system for illuminating a microscopy specimen includes an illumination source configured to emit a light that travels along an illumination path to illuminate the microscopy specimen placed on an optical detection path of an optical microscope. The system also includes optical elements in the illumination path and configured to at least in part transform the light from the illumination source into a light sheet illuminating the microscopy specimen. The optical elements include an electronically tunable lens configured to vary a focal distance of the electronically tunable lens to dynamically vary a position of a waist of the light sheet illuminating the microscopy specimen. The optical elements include a deflector configured to vertically move the light sheet to illuminate the microscopy specimen at different horizontal planes.

Abstract: A stereoscopic endoscope that includes at least one image sensor, one or more processing devices, and a display device. The image sensors sense a pair of stereo images, based on capturing light passing through apertures electronically defined at a first aperture location and a second aperture location, respectively, on a liquid crystal layer within the endoscope. The size of each aperture, spacing between the apertures, and polarization state associated with each aperture are controlled using corresponding control signals provided to the liquid crystal layer. The image data captured through the apertures is used to generate control signals representing one or more views of a surgical scene. The views are then presented on a display device.

Abstract: A relay lens system for transmitting an image from a distal end of the relay lens systems to a proximal end of the relay lens system including a plurality of imaging devices with in each case one or more lenses, wherein each imaging device of the plurality of imaging devices images a real intermediate image distal to the imaging device into a further real intermediate image proximal to the imaging device. The plurality of imaging devices has a plurality of first imaging devices and a second imaging device. The first imaging devices each have a chromatic aberration. The chromatic aberration of the first imaging devices is corrected by the second imaging device. The second imaging device is arranged between the first imaging devices.

Abstract: A focusing device includes a substrate and a plurality of scatterers provided at both sides of the substrate. The scatterers on the both sides of the focusing device may correct geometric aberration, and thus, a field of view (FOV) of the focusing device may be widened.

Abstract: An optoelectronic apparatus includes an array of emitters configured to emit respective beams of optical radiation. Projection optics include first cylindrical lenses, which have respective, mutually-parallel first cylinder axes, and are aligned respectively with the emitters in the array so as to receive and project the respective beams, and a second cylindrical lens, which has a second cylinder axis perpendicular to the first cylinder axes and is positioned adjacent to the first cylindrical lenses so as to receive and project all of the beams from the first cylindrical lenses.

Abstract: An endoscope apparatus having a function of switching between the 2-D observation for a planar view and the 3-D observation for a stereoscopic view, includes an image Processor which carries out processing of reducing a distortion of an image pickup optical system for an image pickup signal achieved by an image pickup element of the endoscope apparatus at the time of the 3-D observation, and the image Processor carries out image processing that satisfies the following conditional expression (1): 0.1<B/A<0.8, as well as A<0??(1) where, A denotes a distortion at the maximum image height at the time of the 2-D observation, and B denotes a distortion at the maximum image height at the time of the 3-D observation.

Abstract: A zoom lens forms an intermediate image at a position conjugate to a reduction side imaging plane and forms the intermediate image again on a magnification side imaging plane. The zoom lens includes a plurality of lens groups including at least two movable lens groups, which move by changing spacings between the groups adjacent to each other in a direction of an optical axis during zooming, at a position closer to the reduction side than the intermediate image. Among the plurality of lens groups, a final lens group closest to the reduction side has a positive refractive power, and remains stationary with respect to the reduction side imaging plane during zooming. The zoom lens satisfies predetermined conditional expressions (1) and (2) about the focal lengths of the movable lens groups.

Abstract: An installation for improving the binocular visual field includes a structural element located at a distance from the observer equal to or greater than the observer's interpupillary distance. The structural element is provided with at least one through aperture, in which an optical system is applied that has two convergent lenses, between which a divergent lens is centrally interposed, the distance between each of the convergent lenses and the central divergent lens being such as to make the optical system of a neutral afocal type.

Abstract: The imaging optical system consists of, in order from the magnification side, a first optical system and a second optical system. The second optical system forms an intermediate image at a position conjugate to the reduction side imaging surface, and the first optical system re-forms the intermediate image on the magnification side imaging surface. The second optical system consists of, in order from the magnification side, a first positive lens, a cemented lens having a positive refractive power as a whole, and a second positive lens. The cemented lens includes one negative lens and one positive lens.

Abstract: Optical assemblies include a stack of optical elements each of which has one or more alignment features. Each alignment feature traces a respective curve along a surface of one of the optical elements. The alignment feature(s) of one optical element fit within the alignment feature(s) of the other. In some cases, the alignment features can help establish more precise lateral alignment of the optical elements.

Abstract: A zoom lens forms an intermediate image at a position conjugate to a reduction side imaging plane and forms the intermediate image again on a magnification side imaging plane. The zoom lens includes a first optical system on the magnification side, and a second optical system on the reduction side. The intermediate image is formed between the magnification and reduction sides. The second optical system includes two or more movable lens groups, which move by changing spacings between the groups adjacent to each other in a direction of an optical axis during zooming, and two stationary lens groups which remain stationary with respect to the reduction side imaging plane during zooming. One stationary lens group is disposed closest to the reduction side, and has a positive refractive power. Also, a lens group closest to the magnification side in the second optical system has a positive refractive power.

Abstract: A system for converting a vertical optical microscope unit to provide selective plane illumination microscopy includes an illumination source unit configured to generate a light sheet along a longitudinal axis to illuminate a sample placed in a vertical optical detection axis of the vertical optical microscope unit. The illumination source unit is configured to generate the light sheet along the longitudinal axis that is substantially perpendicular to the vertical optical detection axis of the vertical optical microscope unit. The illumination source unit is configured to produce an excitation at a plane in the sample that generates fluorescent emissions. A detection sensor is placed in a detection optical path of the vertical optical detection axis of the vertical optical microscope unit. The detection sensor is configured to detect the fluorescent emissions to provide selective plane illumination microscopy.

Abstract: A light sheet microscope includes an objective, an illumination optical system, a correction device, an image pickup device, a first adjustor, a second adjustor and a controller. The controller performs a first focus process and a spherical aberration correction process. The first focus process is a process in which the first adjustor is controlled on the basis of light that is from the light sheet plane and that is detected via the objective so that the light sheet plane and a focal plane become closer when a relative position between the light sheet plane and a sample has been changed. The spherical aberration correction process is a process in which the correction device is controlled so that an evaluation value of the image obtained by the image pickup device becomes greater when the first adjustor has changed the relative position between the light sheet plane and the objective.

Abstract: A light fixture example includes a housing, a light source in the housing and a diffuser. The diffuser is supported by the housing at a distance from the source so as to receive light from the source and diffuse the light for illumination. The diffuser has a three-dimensional compound curvature and a perimeter with at least two edges connected at vertices. Each such edge is a two-dimensional plane curve. The at least two edges are not coplanar with each other. In some examples, a back panel of the housing may have a similar three-dimensional compound curvature and perimeter.

Abstract: The subject matter of the present disclosure generally relates to objective lens changers for optical instruments. In one embodiment, an objective lens changer includes an objective lens carrier moveably attached to a changer frame by a mechanical link arrangement. The objective lens carrier includes two or more objective lens positions. The mechanical link arrangement includes a first link section to provide translation of the objective lens carrier between the objective lens positions and a second link section arranged to control an alignment of the objective lens position with respect to the optical axis of the optical instrument.

Abstract: In a visual target acquisition scope system for an adjustable connection is provided between a unity magnification scope producing 1× magnification image viewed by one eye of the user and a photographic lens/viewfinder of a photographic camera viewed by another eye of the user. According to the system, while the user is looking at an object through the unity magnification scope with one eye and looking at the object through the photographic camera lens with the second eye, the target visible with the first eye is also visible with the second eye.

Abstract: The invention relates to a relay set for an endoscope that includes a plurality of relay sets of the same type, having two plano-convex rod lenses which face one another with their planar end surfaces, and an achromat that is arranged between these rod lenses, particularly in a central aperture plane of said relay set. Said achromat takes the form of an arrangement of at least two lenses which have different refractive indices and Abbe numbers, and is located at a distance from the rod lenses. The invention also relates to a corresponding endoscope. The claimed relay set is improved in that one lens of said achromat consists of ED glass that has an Abbe number of at least 75, in particular at least 77.

Abstract: An endoscope with adjustable viewing angle includes a pivotable prism (to divert light that can pivot around a pivot axis to adjust the viewing angle and a fixed prism to divert light that is diverted by the pivotable prism into a direction parallel to the longitudinal axis of the endoscope, such that at least either a light outlet surface of the pivotable prism is positioned in a recess of the fixed prism or a light inlet surface of the fixed prism is positioned in a recess of the pivotable prism.

Abstract: A light source device including a light source module and an adjusting mechanism is provided. The light source module includes a base, a first light source and at least two second light sources. The first light source is disposed on the base and adapted to emit an invisible light curtain, wherein the invisible light curtain ranges over a display plane. The second light sources are disposed on the base and adapted to emit a first visible light beam and a second visible light beam respectively, wherein the first visible light beam is parallel to the invisible light curtain and the second visible light beam is parallel to the invisible light curtain. The adjusting mechanism is disposed on the base and used to adjust relative positions of the base and the display plane. In addition, an adjusting method of the light source device is also provided.

Abstract: A method of solar occultation, and in particular solar coronagraphy, employing a spacecraft 200 is disclosed. The spacecraft is controlled to achieve a position within a target zone relative to a celestial body, such as the Moon, such that the celestial body occults the Sun, allowing observations of the Sun or the space around the Sun, and in particular the Sun's corona, to be made from the spacecraft. The spacecraft has an orbit 40 around the Earth in a plane S, which like the Moon's orbit 20 in plane M, is inclined relative to the ecliptic plane E. Once inside the target zone, the spacecraft's orbit is controlled such that it remains in the target zone for longer than it would otherwise. This is achieved through the orbit within the target zone being at least partly non-Keplerian, when the orbit is under the influence of spacecraft translational thrust for example.

Abstract: A stereo endoscope having an elongated shaft and a sensor unit comprising two flat image sensors that are symmetrically arranged about a central rotational axis of the shaft. With such stereo endoscope, a lateral direction of view of the stereo endoscope which deviates from a central 0° direction of view can be variably adjusted and/or changed independent of an orientation of the image sensors relative to each other.

Abstract: The invention relates to a long-range optical device, in particular a sighting telescope, comprising an outer housing in which a reversal system is disposed between an objective lens and eyepiece, and having an adjusting mechanism for adjusting the sighting line by adjusting at least one optical component inside the outer housing, and having a resetting mechanism acting on the optical component which has at least one spring in order to generate the restoring force. The resetting mechanism comprises at least one lever which transmits the spring force of the spring to the optical component.

Abstract: An aspect of the present invention is an imaging method using a multifocal lens having a plurality of regions, the plurality of regions having different focal lengths, and the imaging method includes a focusing state control step of controlling a focusing state of the multifocal lens, and an imaging step of obtaining an image of a subject in the controlled focusing state. In the focusing state control step, the focusing state is controlled so that a main subject is focused via a region with a shortest required focusing time among the plurality of regions in response to a picture taking instruction.

Abstract: The present invention provides an optical imaging lens. The optical imaging lens comprises a lens barrel and several lens elements positioned therein. Each lens element has a lens portion and a peripheral portion formed around the lens portion and extending to the rim. The lens portion is formed with an object-side surface facing to the object side and an image-side surface facing to the image side for passing the light. One of the lens elements is an embedded lens element. The radius from the center to the rim of the embedded lens element is smaller than that of another lens element adjacent to the embedded lens element and thus the rim of the embedded lens element is embedded in the peripheral portion of the adjacent lens element.

Abstract: An exemplary wafer level device includes a first wafer and a second wafer. The first wafer has a concave modeling, and the second wafer has a convex modeling, wherein the first wafer and the second wafer are combined together by the concave modeling being engaged with the convex modeling. An exemplary wafer level lens includes a first wafer level lens and a second wafer level lens. The first wafer level lens has a concave modeling, and the second wafer level lens has a convex modeling, wherein the first wafer level lens and the second wafer level lens are combined together by the concave modeling being engaged with the convex modeling.

Abstract: A first lens configured to convert light from the objective lens into parallel light includes a concave lens part having a concave curved face in a center portion of a flat face, and a convex lens part having a convex curved face around a flat face. Further, the first lens includes first and second regions configured to diverge light through the flat face and the concave curved face and a third region configured to collect light through the convex curved face and the concave curved face. When the sample is on a sample table and sealed in a two-dimensional electrophoresis substrate, light totally reflected by a side surface of the objective lens enters the second region. In contrast, when the sample is directly on the sample table, the light enters the third region.