Abstract: Light management constructions contain an optical substrate having a first major surface and a second major surface opposite the first major surface. The first major surface is a microstructured surface with asymmetrical structures. The asymmetrical structures form an ordered arrangement of a plurality of multi-sided refractive prisms, with the multi-sided refractive prisms having a cross section of 4 or greater sides. The light management constructions can be incorporated into optical articles such as windows.

Abstract: An adjusting mechanism of a sample holder is provided. The adjusting mechanism includes a base with drives arranged thereon, and a carrier that is adjustable by means of the drives and is designed to receive the sample holder. A coupling element for each drive, which coupling element is designed to connect the base and the carrier. Each coupling element has at least one linear degree of freedom and also a rotary degree of freedom. The carrier is linearly movable, by means of the coupling elements, along a respective movement axis directed from the coupling element to the carrier. Also provided is a microscope that includes such an adjusting mechanism, along with a method for adjusting the orientation of a sample holder.

Abstract: This disclosure is directed to systems and methods for acquiring IR light and visible light images. A lens may be configured to operate in at least a first configuration and a second configuration. The lens may have a first filter over a first portion of the lens and a second filter over a second portion of the lens. In the first configuration, a third filter may operate with the lens and the second filter to allow visible light from a first object located beyond a predetermined distance from the lens to pass and be focused on a sensor for image acquisition. In the second configuration, a fourth filter may operate with the lens and the first filter to allow IR light from a second object located within the predetermined distance to pass and be focused on the sensor for image acquisition.

Abstract: An optical element including, on a substrate, an anti-reflection layer on multiple small concave protrusions, which have a modal pitch less than or equal to a wavelength of light in an environment where the optical element is to be used, are formed; in which 80% or more of the concave protrusions include one or more steps, and satisfy the following conditions: 0.12d?ws?0.17d and 0.42h?zs?0.52h, in which d is a diameter of the concave protrusions, h is a depth of the concave protrusions, ws is a total width of the steps in any cut surface; and zs is an average depth of the steps.

Abstract: An apparatus for imaging a sample arranged in a first medium in an object plane. The apparatus includes an optical transmission system which images the sample in the object plane in an intermediate image in an intermediate image plane. The object plane and the intermediate image plane form an angle not equal to 90° with an optical axis of the transmission system. The apparatus further comprises an optical imaging system having an objective. The object plane may be imaged on a detector without distortion. The optical transmission system is symmetrical with respect to a pupil plane, the object plane, and the intermediate image plane to satisfy the Scheimpflug condition. The intermediate image lies in a second medium having a refractive index virtually identical to that of the first medium. A lens group of a subsystem arranged closest to the sample or intermediate image comprises at least one catadioptric assembly.

Abstract: An optical lens system comprises, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, and a fourth 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 refractive power has an image-side surface being convex in a paraxial region. The third lens element with positive refractive power has an aspheric object-side surface being concave in a paraxial region and an aspheric image-side surface being convex in a paraxial region. The fourth lens element with refractive power has an aspheric object-side surface being concave in a paraxial region and an aspheric image-side surface being convex in a paraxial region. There are a total of four lens elements with refractive power in the optical lens system.

Abstract: A single focal length lens includes an aperture stop and first through fourth lens units having, respectively, negative refractive power, positive refractive power, negative refractive power, and positive refractive power. Positions of the first, second, and fourth lens units are fixed. When focusing from an object at infinity to an object at a short distance, the third lens unit moves toward the image side. Conditional expressions (1), (2), and (3) are satisfied: ?5<f1/f<?0.5??(1), ?10<f3/f<?1??(2), and 0.5<f12/f<1??(3), where f1 denotes a focal length of the first lens unit, f denotes a focal length of an overall single focal length lens system when focusing to an object at infinity, f3 denotes a focal length of the third lens unit, and f12 denotes a combined focal length of the first and second lens units.

Abstract: Present embodiments provide for a mobile device and an optical imaging lens thereof. The optical imaging lens comprises six lens elements positioned sequentially from an object side to an image side. Through controlling the convex or concave shape of the surfaces and/or the refracting power of the lens elements, the optical imaging lens shows better optical characteristics and the total length of the optical imaging lens is shortened.

Abstract: A magnification device including a housing having a distal open end and a proximal open end is disclosed. The housing includes an optical system including one or more objective lenses adjacent the distal open end, and one or more eye lenses adjacent the proximal open end, the optical system produced a desired level of magnification; and a filtering system having first filter selectively filtering a first group of wavelengths and a second filter selective filtering a second group of wavelengths. The first and second filters having an optical density selected based on a magnification level of the optical system. A vision enhancing assembly including a carrier device and one or more magnification devices coupled to the carrier device is also disclosed, wherein the magnification devices include filters that have optical densities based on a magnification level.

Abstract: An interference objective lens includes: an objective lens configured to converge a light to be emitted from a light source toward a measurement target; a reference surface unit having a reference surface; and a beam splitter configured to split the light having passed through the objective lens into a reference optical path facing toward the reference surface and a measurement optical path facing toward the measurement target, to synthesize a reflected light from the reference surface and a reflected light from the measurement target, and to output the same as an interference light, wherein the reference surface unit is configured to be replaceable.

Abstract: The present invention relates to a substrate carrying a multilayer solar control stack, as well as to a multiple glazing incorporating at least one such sheet of glassy material carrying a solar control stack. The multilayer solar control stack comprises at least n functional layers based on a material which reflects infrared radiation and (n+1) transparent dielectric coatings such that each functional layer is surrounded by transparent dielectric coatings, n being greater than or equal to 3. The stack comprises at least one layer of metallic nature absorbing in the radiation which is visible inside the stack. The invention applies particularly to the formation of solar control glazings with low solar factor.

Abstract: The zoom lens system includes a first lens group with positive power, a second lens group with negative power, a third lens group with positive power, a fourth lens group with negative power, and a fifth lens group with positive power. An aperture stop is provided between the second and the third lens groups. The third lens group includes lens element L3a and L3b with positive power, lens element L3c with negative power, and lens element L3d with positive power. The lens elements L3c and L3d are cemented. The lens element L3b corrects image blurring. The fourth lens group moves when focusing. When zooming, the first to the fourth lens group move. Here, condition (1) below is satisfied. 0.24<fL3b/fG3<3.0??(1) Where fL3b is a focal length of the lens element L3b, and fG3 is a focal length of the third lens group.

Abstract: A variable-magnification optical system has five lens groups, namely, from object side, positive, negative, positive, positive, and negative lens groups, and achieves magnification variation by varying all axial distances between the lens groups. Focusing is achieved by moving the fourth lens group along an optical axis. Vibration correction is achieved by moving all or part of the fifth lens group perpendicularly to the optical axis. Fulfilled are formulae 4.0<|f1/f2|<6.0, 1.0<f4/f1<1.5, and 2.0<|f4/fv|<4.0, f1 representing a focal length of the first lens group, f2 a focal length of the second lens group, f4 a focal length of the fourth lens group, and fv a focal length of the vibration correction group.

Abstract: A single focal imaging optical system includes, in order from an object side, a first lens group with a positive power, an aperture stop, and a second lens group with a positive power. The first lens group includes a first front lens group and a first rear lens group. The first front lens group includes a negative lens having a concave surface on an image side and a positive meniscus lens having a concave surface on the object side. The first rear lens group includes a biconvex lens. The second lens group includes a second front lens group with a negative power and a second rear lens group with a positive power. The system satisfies a following condition: 3.2<f2/f1<9.0, where f1 represents a composite focal length of the first lens group and f2 represents a composite focal length of the second lens group.

Abstract: An optical system that images a scene at two different fields of view, with switching between fields of view enabled by switchable mirrored surface is disclosed. A voltage change across the switchable mirror element generates a change in the reflection and transmission properties of the element, such that the element switches between a mirror state and a lens state. When nested in an annular reflective optic system of a given field of view, the switching element enables the opening of an additional optical path through the center of the reflective optics where a set of refractive optics are assembled into an imaging system for a second field of view. This dual field-of-view system changes field of view with no mechanical movement.

Abstract: An optical film to be arranged on a display surface is adapted so as to allow uniform application of an interlayer filler and thus also is applicable to an image display device equipped with a front plate. Preferably, such optical film is for use in an image display device. The optical film is adapted so that a relationship of the following formula (1) is satisfied: b?0.2a+1.8??(1), where a is the viscosity (Pa·s) of an interlayer filler at the time of attaching the front plate to a surface of the optical film via the interlayer filler, and b is the atomic percentage (atm %) of silicon atoms on the surface of the optical film. The atomic percentage of oxygen atoms on the surface of the optical film is at least 26 atm %.

Abstract: An image capturing system includes a barrel, a lens assembly, at least one planar light shielding sheet and at least one space maintaining member. The lens assembly includes lens elements disposed in the barrel. The planar light shielding sheet has an aperture for light to travel through. The space maintaining member is disposed in the barrel for adjusting a relative position of two of the lens elements. The space maintaining member includes a regulating portion, and the regulating portion includes an annular groove. The planar light shielding sheet is assembled to the annular groove, and the regulating portion is for adjusting and limiting a position of the planar light shielding sheet. A thickness of the planar light shielding sheet is smaller than a width of the annular groove.

Abstract: A projection optical system is disclosed. The projection optical system includes a first optical system configured to form a first image conjugated with an object and a second optical system configured to project a second image conjugated with the first image toward a projection surface. At least one of the first optical system and second optical system includes at least one optical element(s) movable relative to the object is provided. An image distance of the projection optical system is changed and a size of the second image is changed, by moving at least one of the optical element(s) relative to the object.

Abstract: Present embodiments provide for a mobile device and an optical imaging lens thereof. The optical imaging lens comprises six lens elements positioned sequentially from an object side to an image side. Through controlling the convex or concave shape of the surfaces and/or the refracting power of the lens elements, the optical imaging lens shows better optical characteristics and the total length of the optical imaging lens is shortened.

Abstract: Lens barrel 3 is provided with a first lens frame (first group lens frame 10) holding a first lens group (first group lens G1), a second lens frame (second group lens frame 20) holding a second lens group (second group lens G2), and resilient members (leaf springs 14). Second lens frame 20 is disposed inside of first lens frame 10, and furthermore, can be moved relatively to first lens frame 10 in the direction of optical axis AX. The resilient members (leaf springs 14) are disposed between first lens frame 10 and second lens frame 20 in such a manner as to urge second group lens frame 20 inward against first lens frame 10.