Abstract: By tiling multiple waveguide displays in an artificial-reality system, and/or using multiple projectors per waveguide display, a large field of view for the artificial-reality system can be achieved using waveguide displays. By using waveguide displays, a form factor for a virtual-reality system can be reduced compared to conventional virtual-reality systems.

Abstract: An apparatus having an optical structure and ridges is described, wherein adhesive is arranged between the ridges and the optical structure, wherein the adhesive is effective to effect, after its annealing, a predetermined orientation of the optical structure in relation to a reference plane.

Abstract: An optical assembly is manufactured by combining a first optical component with a second optical component. The optical components each comprise respective optical surfaces and alignment structures. The first optical surface is aligned with respect to the second optical surface by a connection between the alignment structures and their predefined relative positions with respect to the optical surfaces. The relative positions are determined by a high-accuracy manufacturing process such as diamond turning wherein, for each optical component, a respective alignment structure is manufactured together with a respect optical surface from a single work piece.

Abstract: An imaging lens module includes an imaging lens assembly, an image sensor and a plastic lens barrel. The image sensor is disposed on an image side of the imaging lens assembly and has an image sensing surface through which an optical axis of the imaging lens assembly passes. The plastic lens barrel includes an object-end portion, a bottom portion, a first inner hole portion and a second inner hole portion. An object-end surface of the object-end portion faces towards an object side direction of the imaging lens assembly. A tapered surface of the object-end portion is tapered off towards the object-end surface. The bottom portion is located on an image side of the object-end portion. The imaging lens assembly is disposed in the first inner hole portion. The second inner hole portion located on an image side of the first inner hole portion and includes an optical aligning structure.

Abstract: An optical processor is presented for applying optical processing to a light field passing through a predetermined imaging lens unit. The optical processor comprises a pattern in the form of spaced apart regions of different optical properties. The pattern is configured to define a phase coder, and a dispersion profile coder. The phase coder affects profiles of Through Focus Modulation Transfer Function (TFMTF) for different wavelength components of the light field in accordance with a predetermined profile of an extended depth of focusing to be obtained by the imaging lens unit. The dispersion profile coder is configured in accordance with the imaging lens unit and the predetermined profile of the extended depth of focusing to provide a predetermined overlapping between said TFMTF profiles within said predetermined profile of the extended depth of focusing.

Abstract: The present invention provides a reflective wide-angle lens having a large aperture (for example, FNO 1.7) and a small projection ratio (for example, TR?0.2). The reflective wide-angle lens reduces lens size and reduces the number of lenses required while achieving a clear focus on a wide range of screen sizes. The reflective wide-angle lens comprises a front lens group and a rear lens group. The front lens group comprises a first lens group and two second lens group. The rear lens group comprises a curved mirror. The first lens group comprises at least a triple cemented lens, an aspherical lens, and two spherical lenses. The second lens group comprises at least two aspherical lenses and two spherical lenses. The curved mirror is a concave optical symmetric aspheric mirror.

Abstract: An optical assembly includes a beam path, passing, in succession, through multiple microlens arrays and a Fourier lens assembly. The microlens arrays have a uniform aperture of their microlenses, and the entirety of the microlens arrays has an effective focal length. The optical assembly further includes an adjustment mechanism, configured to adjust a mutual optical distance of at least some of the microlens arrays in the beam path, thereby setting the effective focal length of the entirety of the microlens arrays. The adjustment mechanism has multiple adjustment positions i=1, . . . , M wherein M is a natural number ?2, i is an adjustment position index, at which the term a 2 ? · f ML , i in each case essentially smoothly results in a natural number Ni. ? is a center wavelength, fML,i is an effective focal length fML of the entirety of the microlens arrays set by the adjustment position i.

Abstract: Techniques are described herein that are capable of adjusting a notch frequency of an adaptive notch filter (“filter”) to track a resonant frequency of a slow scan MEMS mirror (“mirror”). For instance, an adaptive feedback may be configured to determine one or more resonant frequencies of the mirror based at least in part on a frequency response of an output signal that is proportional to movement of the mirror. The adaptive feedback may be further configured to adjust at least one notch frequency of the filter to track at least one respective resonant frequency of the mirror. The filter may be configured to modify a magnitude of a frequency response of a combination of the filter and the mirror to be substantially constant by suppressing the at least one notch frequency in a frequency response of the mirror.

Abstract: Holographic energy directing systems may include a waveguide array and a relay element. Disclosed calibration approaches allows for mapping of energy locations and mapping of energy locations to angular direction of energy as defined in a four-dimensional plenopic system. Distortions due to the waveguide array and relay element may also be compensated.

Abstract: An electronic device includes at least one optical lens assembly. The optical lens assembly includes four lens elements, and the four lens elements are, in order from an outside to an inside, a first lens element, a second lens element, a third lens element and a fourth lens element. The first lens element has an outside surface being convex in a paraxial region thereof. The second lens element has an inside surface being convex in a paraxial region thereof. The fourth lens element has an inside surface being concave in a paraxial region thereof, wherein at least one of an outside surface and the inside surface of the fourth lens element includes at least one critical point in an off-axis region thereof.

Abstract: A sample observation device includes a light source, an illumination optical system, an observation optical system, a detector, a processor, and a drive controller. The illumination optical system includes a condenser lens and an aperture, and the observation optical system includes an objective lens and a light attenuation member. The light attenuation member and the aperture are conjugate. The aperture includes an aperture region, and the light attenuation member includes a light attenuation region. A size of the aperture region, a position of the aperture region, a size of the light attenuation region, and a position of the light attenuation region are set such that a predetermined state is generated. The processor determines light quantity of light received with the detector. The drive controller changes an interval between a sample and the objective lens on the basis of the light quantity such that the light quantity becomes minimum.

Abstract: A display device may comprise a transmittance control structure having a variable transmittance and a mirror type display panel disposed on a rear surface of the transmittance control structure. The mirror type display panel may comprise a substrate, a display member disposed on the substrate, the display member including a light emission region, a first transmission region, and a peripheral region surrounding the light emission region and the first transmission region, and a reflective member facing the substrate with respect to the display member, the reflective member including an opening region corresponding to the light emission region, a second transmission region corresponding to the first transmission region, and a reflective region surrounding the opening region and the second transmission region.

Abstract: An imaging optical system consists of, in order from a magnification side: a first optical system that forms an intermediate image on a position conjugate to a magnification side imaging surface; and a second optical system that re-forms the intermediate image on a reduction side imaging surface. The first optical system includes at least two focusing lens groups that move with different loci during focusing. The imaging optical system satisfies predetermined conditional expressions relating to the focusing lens groups.

Abstract: An optical lens assembly includes five lens elements and provides a TTL/EFL<1.0. In an embodiment, the focal length of the first lens element f1<TTL/2, an air gap between first and second lens elements is smaller than half the second lens element thickness, an air gap between the third and fourth lens elements is greater than TTL/5 and an air gap between the fourth and fifth lens elements is smaller than about 1.5 times the fifth lens element thickness. All lens elements may be aspheric.

Abstract: An imaging optical lens assembly includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region. The second lens element with negative refractive power has an object-side surface being concave in a paraxial region. The third lens element has an object-side surface and an image-side surface being aspheric. The fourth lens element with negative refractive power has an object-side surface being concave and an image-side surface being concave in a paraxial region, wherein the image-side surface has convex shape in an off-axis region, and the two surfaces thereof are aspheric. The fifth lens element with positive refractive power has an object-side surface and an image-side surface being both aspheric.

Abstract: The invention relates to a metasurface lens using a planar array of elementary resonators, each elementary resonator being the shape of a cross the arms of which are of unequal length. The phase shift applied by an elementary resonator is dependent on its orientation in the plane of the lens, the orientation of the various elementary resonators being determined depending on the shape of the desired wavefront. Such a lens has a substantially uniform transmission-coefficient distribution and a low chromatic aberration. Furthermore, it has a very good spectral selectivity.

Abstract: A folded telephoto lens system may include multiple lenses with refractive power and a light path folding element. Light entering the camera through lens(es) on a first path is refracted to the folding element, which changes direction of the light on to a second path with lens(es) that refract the light to form an image plane at a photosensor. At least one of the object side and image side surfaces of at least one of the lens elements may be aspheric. Total track length (TTL) of the lens system may be 14.0 mm or less. The lens system may be configured so that the telephoto ratio (TTL/f) is less than or equal to 1.0. Materials, radii of curvature, shapes, sizes, spacing, and aspheric coefficients of the optical elements may be selected to achieve quality optical performance and high image resolution in a small form factor camera.

Abstract: Aspects of this disclosure concern controllers and control methods for applying a drive voltage to bus bars of optically switchable devices such as electrochromic devices. Such devices are often provided on windows such as architectural glass. In certain embodiments, the applied drive voltage is controlled in a manner that efficiently drives an optical transition over the entire surface of the electrochromic device. The drive voltage is controlled to account for differences in effective voltage experienced in regions between the bus bars and regions proximate the bus bars. Regions near the bus bars experience the highest effective voltage. In some cases, feedback may be used to monitor an optical transition. In these or other cases, a group of optically switchable devices may transition together over a particular duration to achieve approximately uniform tint states over time during the transition.

Abstract: An optical system for overlaying a first image of a scene and a second image includes a first imaging device providing the first image, a second imaging device with an image display and collimation optics providing the second image, and a waveguide. The waveguide has a first diffraction grating configured to receive the first image, a second diffraction grating configured to receive the second image, and a guide portion disposed between the first diffraction grating and the second diffraction grating configured to convey the second image to the first grating. The first diffraction grating is configured to overlay the first image and the second image.

Abstract: A related-art optical element using an antireflection film having a layer having an uneven structure or a porous layer has involved a problem in that the performance of the antireflection film is degraded by SO2 in an exhaust gas. In view of the problem, provided are an optical element in which a positive ion spectrum of a surface of an antireflection film measured by TOF-SIMS has a peak of CmHnN+, where m represents an integer of 1 or more to 8 or less, and n represents an integer of 2 or more to 16 or less, and a method of producing the element.