Abstract: We fabricate a stereoscopic hologram of an object by capturing a sequence of 2D images of the object, moving camera along a linear axis past the object and keeping the optical axis of the camera perpendicular at each of the positions. The camera lens and image recording surface are translated along the axis such that a fiducial part of the image does not move. The sequence is replayed and a first volume hologram is recorded by recording holograms of the captured images on a diffusing screen in different spatial locations on a surface of the first volume hologram. This is then replayed to form a stereoscopic image of the object and a second, volume reflection hologram of the replayed image is recorded to provide the stereoscopic hologram. A central image of the sequence is aligned to the fiducial part of the holographic image to make the resulting hologram “user-friendly”.

Abstract: A method for SPIM microscopy, wherein the sample is moved continuously, and a plurality of images are taken at time intervals by means of a detection arrangement during the movement. The image capture duration or exposure time is dimensioned such that the movement path of the sample lies within a predetermined resolution range of the detection objective. The speed of the sample movement is determined and set by the image capture duration or exposure time and/or the distortion of the point spread function generated by the sample movement of the sample. The image blur is corrected computationally by the respective image capture duration and the movement speed. A sharp image is generated in this way. The actual optical section thickness of the light sheet is determined from the light sheet thickness, and the movement speed is determined therefrom and from user settings.

Abstract: A microscope apparatus includes a light source configured to emit a coherent illuminating light, an optical system configured to irradiate a specimen with the illumination light, and a detector configured to form an image based on a light generated from the specimen by the illumination light that irradiates the specimen. The optical system is configured to project a plurality of focal points of the illumination light on the specimen, and allow the plurality of focal points to interfere with each other while changing phases of the plurality of focal points.

Abstract: To off-axis and on-axis aberrations at low cost while having a wide angle of view, an endoscope objective optical system (1) has in order: a negative first lens (L1); a negative second lens (L2) and a third lens (L3) joined to each other; a brightness diaphragm (S); and a positive lens group (G2) having a cemented lens (CL2) including one positive lens and one negative lens joined to each other, and satisfies expressions (1) and (2): 1.0<D3(96 deg)/f_all<10??(1) 1.1<(r1+r2)/(r1?r2)<5.0??(2) where, D3(96 deg) is a distance in which a chief ray of a d-line having an incident angle of 96 degrees that enters the first lens transmits the third lens, f_all is a focal distance of the whole system, r1 and r2 are radii of curvature of an object side surface of the first lens and an image side surface of the second lens, respectively.

Abstract: The present invention relates to an eye-protector assembly. The assembly includes arcuate-shaped protective cover. The assembly includes an eye-covering member pivotably connected to the protective cover. The protective cover is shaped to receive the eye-covering member when the eye-covering member is pivoted towards the cover. The assembly includes a pair of connector mechanisms for selectively coupling the protective cover to a hearing protector.

Abstract: A method for estimating an eye/spectacles distance (VG) includes the steps of: a) acquiring at least two images of the wearer (1), in which the head (10) of the wearer exhibits various angular positions; b) determining, for each image acquired, an angle of inclination (?301) of the head of the wearer with respect to the image sensor; c) acquiring at least two simulated values (VG1, VG2, VG3) of the eye/spectacles distance sought; d) calculating, for each image acquired and with each simulated value, a morphological distance (EG1301, EG2301, EG3301) between the eye of the wearer and a median plane of the head of the wearer, having regard to the angle of inclination; and e) selecting, from among the simulated values, the one closest to the eye/spectacles distance of the wearer, as a function of the head/plane distances calculated in step d).

Abstract: A method for determining at least one characteristic relating to the posture of the head (10) of a person (1) wearing spectacles (100) including a frame (110) and two lenses (150G, 150D), using a determining device including an image sensor, at least one light source and a computation unit, the method includes steps of: a) acquiring an image (301) of at least part of the wearer's head, in which the spectacles are illuminated by the light source; b) in the image, locating reflections (160D, 160G, 161D, 161G) from the light source, reflected by the two lenses of the spectacles; and c) deducing the wearer's head posture characteristic in relation to the image sensor, as a function of the position of the reflections in the image.

Abstract: A reaction compensated tilt platform assembly comprises a support base, and a reaction mass, pivotally coupled to the support base. A tilt platform which can function as or support a mirror is pivotally coupled to the support base. At least two linear actuator coil assemblies are carried by the reaction mass. At least two linear actuator magnet assemblies are carried by the tilt platform and are disposable within the at least two linear actuator coil assemblies. The linear actuator magnet assemblies taper from a larger diameter toward a center of the magnet assembly to a smaller diameter toward an end of the magnet assemblies. Actuation of the linear actuator magnets results in pivotal movement of the tilt platform relative to the reaction mass.

Abstract: Various light-scanning systems that can be used to perform rapid point-by-point illumination of a focal plane within a specimen are disclosed. The light-scanning systems can be incorporated in confocal microscopy instruments to create an excitation beam pivot axis that lies within an aperture at the back plate of an objective lens. The light-scanning systems receive a beam of excitation light from a light source and direct the excitation beam to pass through the pivot point in the aperture of the back plate of the objective lens while continuously scanning the focused excitation beam across a focal plane.

Abstract: Using a stereoscopic image display device 10 formed by arranging plural cubic corner bodies 12 in a plane state such that shaft centers thereof are parallel to each other, each of the bodies 12 having three reflective planes 17-19 perpendicular to each other and a reflected light outlet 11 a provided at a corner of the planes 17-19, and placing a half mirror 14 on a light entrance plane of the bodies 12, an image is formed by letting a light from an object 26 in the light entrance plane of the bodies 12 and recursively reflecting the light off the bodies 12; and reflecting the recursively reflected light off the half mirror 14 and letting the light out from the reflected light outlet 11a to outside. Accordingly, a stereoscopic image, i.e., a real image of the object can be observed when the device 10 is viewed from a front side.

Abstract: A method of generating a hologram of an object is disclosed. The method comprises: receiving data corresponding to a plurality of non-coherent sub-holograms acquired by an optically passive synthetic aperture holographic apparatus, combining the sub-holograms to generate a mosaic hologram of the object, and transmitting the mosaic hologram to a computer readable medium.

Abstract: A MEMS micromirror (30) is presented including a frame (60) with a mirror body (50) arranged therein, a cantilever beam assembly (70) and vertical support beams (40). The mirror body (50) is rotatable around a rotation axis (58) extending in a plane (x-y) defined by the frame (60). The cantilever beam assembly (70) has a longitudinal direction and extends within said plane. The vertical support beams (40) are connected between the mirror body (50) and the frame (60) along the rotation axis (58). The cantilever beam assembly (70) has a cantilever beam (72), being coupled at a first end via relief means (74) to the frame (60) and fixed at a second end (722) to the mirror body (50). The cantilever beam (72) has a thickness, perpendicular to a plane of the frame (60), that is smaller than its width in the plane of the frame (60).

Abstract: An ophthalmic surgical microscope can include a first light source configured to project a first light beam at an observer's eye. The microscope can include a first wavefront sensor. The first wavefront sensor can be configured to determine aberrations in the first reflection wavefront of a reflection of the first light beam. The microscope can include adaptive optical element(s). The adaptive optical element(s) can be controlled to modify the phase of incident light. The microscope can include a computing device in communication with the first wavefront sensor and the adaptive optical element(s). The computing device can be configured to generate the control signal to compensate for the aberrations and to provide the control signal to the adaptive optical element(s). A second light source and second wavefront sensor can be provided to compensate for aberrations of a subject's eye.

Abstract: A broadband partial reflector includes a first multilayer polymeric optical film having a total number of optical repeating units from a first side to a second side of the first multilayer polymeric optical film and a second multilayer polymeric optical film having a total number of optical repeating units from a first side to a second side of the second multilayer polymeric optical film and an intermediate layer on the second side of the multilayer polymeric optical film separates the first multilayer polymeric optical film from the second multilayer polymeric optical film. The first multilayer polymeric optical film has a first baseline optical repeating unit thickness profile and a first apodized optical repeating unit thickness profile monotonically deviating from the first baseline optical repeating unit thickness profile and defining the second side of the first multilayer polymeric optical film.

Abstract: An image pickup lens includes an aperture stop, a first lens with positive refractive power having a convex object-side surface, a second lens with negative refractive power having a concave image-side surface, a third lens with positive refractive power having a convex image-side surface, a fourth lens with negative refractive power as a double-sided aspheric lens having a concave object-side surface, and a fifth lens with negative refractive power of a meniscus shape as a double-sided aspheric lens having a concave image-side surface, wherein the fifth lens is designed so that the negative refractive power weakens as the distance from the optical axis increases, and wherein the following conditional expression (1) is satisfied: 0.55<f1/f<1.0??(1) where f represents a focal length of an overall image pickup lens, and f1 represents a focal length of the first lens.

Abstract: A photonic assembly for observing a preselected color includes an assembly of colloidal particles in a continuous liquid phase, the colloidal particles comprising a core scattering center and a shell layer surrounding the core, wherein the core scattering center is selected to scatter light having a predetermined wavelength, and wherein the shell has a thickness selected to provide an overall colloidal particle size that is about the same dimension as the wavelength of preselected color to be observed.

Abstract: An optical imaging apparatus 10 disposing the first and the second reflective components 12, 14 abutting to or in proximity to each other when reflective surfaces 11, 13 of the first and the second reflective components 12, 14 are crossed when viewed from thereabove, the first and the second reflective components 12, 14 composed of the transparent material with a plurality of belt-shaped reflective surfaces 11, 13 vertically disposed in parallel, wherein the first and the second reflective components 12, 14 are formed with a plurality of reflectors 15-18 laminated respectively and the places of the reflective surfaces 11, 13 of each reflector 15-18 of the first and the second reflective components 12, 14 are shifted in parallel. Thus, high definition three-dimensional real image is formed inexpensively in a space a plurality of observers gaze simultaneously.

Abstract: The zoom lens comprises, from an object side, a first lens group, a second lens group that includes an aperture stop moving integrally therewith, a third lens group, and a fourth lens group having, respectively, negative, positive, negative, and positive refracting power, and during zooming from a wide-angle end to a telephoto end, a spacing between the first and second lens groups becomes narrow, between the second and third lens groups changes, and between the third and fourth lens groups grows wide, and the first lens group includes a first lens having negative refracting power, a second lens having a reflective surface for bending a light ray coming out of an object and a third lens having positive refracting power, and in said second lens group, a most image-plane-side surface of a lens having negative refracting power is configured in a concave shape on an image plane side.

Abstract: An image pickup lens includes an aperture stop, a first lens with positive refractive power having a convex object-side surface, a second meniscus lens having a concave image-side surface, a third meniscus lens having a convex image-side surface, a fourth meniscus lens having a concave object-side surface near an optical axis, and a fifth meniscus lens having a concave image-side surface near the optical axis, wherein the image-side surface of the fourth lens has an aspherical shape in which a positive refractive power weakens toward the periphery, and wherein the following conditional expressions (1) and (7) are satisfied: 0.55<f1/f<1.0??(1) ?1.6<f2/f<?0.7??(7) where f represents a focal length of an overall image pickup lens, f1 represents a first lens focal length, and f2 represents a second lens focal length.

Abstract: A variable optical attenuator in which a polarization beam splitter splits a beam incoming from the front into two linearly-polarized beams perpendicular to each other and separately outputs them to the back along first and second light paths. A Faraday rotator rotates a polarization plane of the two incoming linearly-polarized beams to an arbitrary angle by controlling a magnetic field to be applied to a Faraday element by a magnetism applying means and outputs them to the back. First and second analyzers arranged in the first and the second light paths and parallelly arranged perpendicular to these light paths are arranged in that order. The two analyzers have optical axes perpendicular to each other so that the optical axes are in the same direction as that of the polarization plane of the two linearly-polarized beams output from the polarization beam splitter.