Abstract: An optical imaging system includes at least one optical component including an optical filter and a lens, wherein a hard coat is applied to an object side or an image side of an optical surface of the at least one optical component, and the hard coat is formed to be able to come into contact with a different component positioned adjacent thereto or an optical surface of a different optical component positioned adjacent thereto.

Abstract: Provided is a imaging optical system for an image sensor. The imaging optical system includes a stop and a first lens sequentially arranged from an object side. The first lens has aspherical surfaces on both sides and has a positive refractive power, a first surface of the first lens which faces the object side is a convex surface and a second surface of the first lens which faces an image side is a convex surface.

Abstract: An apochromatic lens with an aperture and exclusively refractive optical elements, comprising a plurality of lenses arranged in lens groups along an optical axis, wherein lenses of different materials are provided and wherein the lenses respectively comprise one of the following listed materials: calcium fluoride (CaF2), synthetic quartz (SiO2) or another radiation-resistant optical material.

Abstract: An incident-light controlling apparatus has a first aperture in a substrate, a diaphragm blade which rotates around an axis, and controls light passing through the first aperture, by the diaphragm blade rotating alternately between a first stationary position coinciding with the first aperture, and a second stationary position retracted from the first aperture, a permanent magnet joined directly to the diaphragm blade, at a position of the axis of rotation of the diaphragm blade, and magnetized in a direction of a plane of rotation of the diaphragm blade, and a pair of coils having a winding around cores disposed such that an end portion of each coil faces the magnet. The diaphragm blade rotated alternately between the first and second stationary positions due to an interaction between a generated magnetic field upon passing an electric power, and a magnetic field generated due to the magnet.

Abstract: A molded optical filter is provided having effective filtering of energy emissions at an optical density (OD) of greater than 4 in three energy emission bands corresponding to the wavelengths of laser emissions while preserving the wearer's ability to differentiate and recognize colors and having a pleasing overall color. The selective optical filter is a moldable polymer filter that has three dyes therein to produce sharp notch filtering ranges at about 530 nm, 700 nm and 1060 nm and a fourth color balance dye therein to adjust the overall color of the filter making it more pleasing and desirable to the wearer.

Abstract: An imaging apparatus includes an imaging system, a dome cover that houses the imaging system, and a correction lens between the imaging system and the dome cover. The focal length of the dome cover and the focal length of the correction lens are appropriately set based on predetermined conditions.

Abstract: An exemplary method for manufacturing an infrared (IR) cut-off filter coated lens array includes: providing a light pervious panel having a first surface and a second surface at opposite sides thereof; forming an infrared cut-off filter film on the first surface of the light pervious panel; and forming a plurality of discrete lens structures on the second surface of the light pervious panel through a photolithography process.

Abstract: In a lens for safety glasses of the present invention, a first lens element which shields a laser beam is laid on a second lens element for antiglare. The first and the second lens element may be affixed together. In the lens for safety glasses, the first lens element includes a substrate which contains an absorbent for selectively absorbing a laser beam having a specific wavelength in an ultraviolet wavelength region, a visible light wavelength region or an infrared wavelength legion and is transparent in the visible light wavelength region. The safety glasses with the lens may provide comfortable fit and a good appearance, causes less misjudgment of colors and prevents loss of correct color sense, and has both a laser-beam shielding function and an antiglare function.

Abstract: The invention relates to a multilayer material deposited by ALD. A multi-layer structure of a high refractive index material is deposited on a substrate using ALD at a temperature below about 450° C. Advantageous results are obtained when a high refractive index material A is coated with another material B after a certain thickness of material A has been achieved. Thus, the B barrier layer stops the tendency for material A to crystallize. The amorphous structure gives rise to less optical loss. Further, the different stress nature of materials A and B may be utilized to achieve a final optical material with minimal stress. The thickness of each material B layer is less than that of the adjacent A layer(s). The total effective refractive index of the high refractive index material A+B being shall be greater than 2.20 at a wavelength of 600 nm. Titanium oxide and aluminium oxide are preferred A and B materials. The structure is useful for optical coatings.

Abstract: A dichroic filter that for use with an electronic imaging device, such as a camera. The dichroic filter is located in the main imaging lens, and may permit all light to pass through a first portion and be measured by a photosensor, while restricting at least some portions of visible light from passing through a second portion thereof. In this manner, only the non-restricted portions of visible light passing through the second portion may be measured by the associated pixels of the photosensor. The filter may be formed from a first aperture permitting a first set of wavelengths to pass therethrough and a second aperture adjacent the first aperture, the second aperture permitting only a subset of the first set of wavelengths to pass therethrough. The second aperture may be a dichroic mirror or it may be an optical filter of some other type.

Abstract: A negative refraction photonic crystal lens is provided. The negative refraction photonic crystal lens includes a substrate and a plurality of voids periodically distributed in the substrate. The voids are configured extending along a direction longitudinally perpendicular with an incident direction of a light having a specific wavelength. By suitably selecting a refractive index of the substrate, a radius of the voids, and a lattice parameter of the voids, the negative refraction photonic crystal lens presents a negative refraction characteristic with respect to the specific wavelength, in that the light incident from one side of the substrate can be focused at the other side of the substrate, thus configuring an optical lens. The optical lens is adapted for not only achieving an optimal sub-wavelength focusing performance, but also further improving the imaging resolution of the negative refraction photonic crystal lens by employing an anisotropic material for preparing the substrate.

Abstract: The optical element includes in order from a light-entering side, a first layer (012), a second layer (013), and a base member (011). The first layer includes a concavo-convex structure with convex portions (012a) and concave portions (012b) alternately formed at a pitch smaller than a wavelength ? of entering light, and the second layer satisfies the following conditions: nb · n ? ? s - 0.15 ? n ? ? A ? nb · n ? ? s + 0.10 ? 8 · n ? ? A ? dA ? ? n ? ? A where ns represents an effective refractive index of the first layer, nb represents a refractive index of the base member, and nA and dA respectively represent a refractive index and a thickness of the second layer.

Abstract: At least one exemplary embodiment is directed to a light quantity adjusting apparatus that can include a first blade member configured to be driven by a drive source, such as a motor, and a second blade member whose movement is configured to be related to the movement of the first blade member.

Abstract: A composite optical device 1 includes a first optical section 10 having an optical functional surface 11 and a second optical section 20 bonded to the first optical section 10 on the optical functional surface 11. The optical functional surface 11 includes a smooth part 13 and a concave-convex part 12 adjacent to each other, and is constructed so that a position P2, along a normal direction of the smooth part 13, of a concave bottom of the concave-convex part 12 can be closer to the center of the first optical section 10 than a position P1 along the normal direction of an end of the smooth part 13 on a side of the concave-convex part 12 in a boundary vicinity portion NR between the smooth part 13 and the concave-convex part 12.

Abstract: A lens includes a central optical portion, a peripheral portion surrounding the central optical portion, a first ZnS coating formed on the central optical portion and the peripheral portion at one side of the lens, and a first MgF2 coating formed the central optical, the peripheral portion being free of MgF2 coating formed thereon. The optical thickness of the first ZnS coating is one quarter of a wavelength of predetermined light passing therethrough. The optical thickness of the first MgF2 coating is one quarter of the wavelength of the predetermined light.

Abstract: A lens system with a lens formed of a material having a negative index of refraction in an operational frequency range, a first surface of the material having a convex hyperbolic curvature, and a second surface of the material having a concave circular curvature. A lens system can include two of these lenses, arranged with the concave circular surfaces facing each other. Far field radiation arriving at the hyperbolic surface of the the first lens is refracted by the lens material toward the circular surface, out of the first lens in a direction parallel to the original radiation direction, and into the circular surface of the second lens, where it is refracted toward the hyperbolic surface of the second lens, and exits the second lens in a direction parallel to the original direction. The lens material can have a tunable or fixed negative refractive index and/or resonant frequency.

Abstract: The present invention provides an optical element including: a substrate; and an antireflection film formed on a surface of the substrate. The antireflection film includes a plurality of lower refractive index layers, and a plurality of higher refractive index layers which are layered alternately. Each of at least two of the plurality of lower refractive index layers comprises a same main component each other and comprises a side component with a different content ratio independently.

Abstract: A lens assembly for an imaging device may include a lens member for focusing external radiation towards an image sensor of the imaging device, and a screen member adjacent the lens member. A transparent portion may be positioned between the lens member and the external radiation and may have first and second surfaces. A first mask member may be positioned at the first surface of the transparent portion and may have an inlet therein. A second mask member may be positioned at the second surface of the transparent portion and may have an outlet therein. The outlet may be smaller than the inlet.

Abstract: An optical element (1) made of a material that is transparent to wavelengths in the UV region, which optical element (1) includes an oleophobic coating (6, 7) outside of its optically free diameter whose disperse component of the surface energy is preferably 25 mN/m or less, particularly preferably 20 mN/m or less, in particular 15 mN/m or less. In addition or as an alternative, the optical element (1) within its optically free diameter comprises an oleophilic coating (9b, 9c) that is transparent to wavelengths in the UV region, with the disperse component of the surface energy of this coating preferably being more than 25 mN/m, particularly preferably more than 30 mN/m, in particular more than 40 mN/m. The optical element may be provided in an arrangement in which it dips at least partially into an organic liquid.

Abstract: A filter device has a frame, an optical filter, two magnetic members and two covers. The frame has a window and two rails attached to the opposite sides of the window. Each rail has two coil holding portions. The optical filter is able to slide between the rails and has at least one lens and two holders holding the magnetic members. The covers hold the optical filter between the rails. Thus the filter device is able to prevent the coils from wear-out failures with a simple and enduring structure.

Abstract: An image pickup system includes one or more optical elements, wherein an infrared cut coating in which a maximum value of reflectance at the wavelength ? of 800 to 1200 nm is 30% or more, is formed on at least two optical surfaces of the optical elements.

Abstract: A method of making a plurality of micro-optical systems includes providing a plurality of diffractive optical elements and aligning each diffractive optical element with a refractive optical element. Each micro-optical system includes a refractive optical element and a diffractive optical element. The diffractive optical element provides different focal lengths at three different wavelengths for each micro-optical system and includes adjacent steps within a cycle having a difference of more the 2? for at least one of the three different wavelengths.

Abstract: An optical module in which the light outputted from the light source is condensed before outputted, and yet capable of reducing the development of contaminants on the light condensing area. The optical module includes: a light source for outputting light in the short wavelength region; a transparent member having a light input face and a light output face; and a condensing optical system for inputting the light outputted from the light source to the input face of the transparent member, and focusing the light on the output face. The transparent member has an alkali metal content (e.g. Na or K) of less than 2.0% by weight, and/or with a light absorption of less than 0.65%/mm for the light outputted from the light source.

Abstract: A molded optical filter is provided having effective filtering of energy emissions at an optical density (OD) of greater than 4 in three energy emission bands corresponding to the wavelengths of laser emissions while preserving the wearer's ability to differentiate and recognize colors and having a pleasing overall color. The selective optical filter is a moldable polymer filter that has three dyes therein to produce sharp notch filtering ranges at about 530 nm, 700 nm and 1060 nm and a fourth color balance dye therein to adjust the overall color of the filter making it more pleasing and desirable to the wearer.

Abstract: An exemplary method for manufacturing an infrared (IR) cut-off filter coated lens array includes: providing a light pervious panel having a first surface and a second surface at opposite sides thereof; forming an infrared cut-off filter film on the first surface of the light pervious panel; and forming a plurality of discrete lens structures on the second surface of the light pervious panel through a photolithography process.

Abstract: A spill light removing device includes a first blocker which is located perpendicularly to a stream route of light being irradiated from a light source and blocks a stream of light that is incident to the surface of the first blocker, except on a hole formed on the first blocker; a pass-through tunnel which is connected to the hole and is formed in the same direction to the stream route of light and allows the stream of the light to pass through; and a second blocker which has a irregularity pattern that is formed on a inner wall of the pass-through tunnel and reflects the light that is incident in the deviated direction of the stream route of light.

Abstract: An imaging apparatus includes an image sensor, a first optical member disposed ahead of a front of the image sensor, a second optical member disposed between the first optical member and the image sensor, and a holder. The holder elastically retains the first optical member and retains the second optical member so that the second optical member is opposed to the elastically retained first optical member. The imaging apparatus further includes a film-like resin filter disposed between the first optical member and the second optical member that is bonded to at least one of the first optical member and the second optical member.

Abstract: According to one embodiment, a circuit element for a plasmonic circuit is formed using a dielectric layer having two portions, each characterized by a different electric permittivity. The dielectric layer is adjacent to a metal layer, with the interface between the layers defining a conduit for propagation of surface plasmons. A dielectric boundary between the two portions of the dielectric layer is shaped to enable the circuit element to change one or more of propagation direction, cross-section, spectral composition, and intensity distribution for a beam of surface plasmons received by the circuit element.

Abstract: A flip-flop circuit of the present invention includes a first switch and a second switch which are connected in series to each other. The first switch includes: two input ports upon which light source light and signal light are incident; two output ports for outputting an optical output; and a thermal lens forming element for forming a thermal lens in a predetermined optical inputting condition. Although the second switch is composed in the same manner as that of the first switch, a relation between the wave-lengths to be utilized is inverted. When a state is changed from OFF to ON, a pulse signal is inputted for setting and one of the rays of output light of the second switch is fed-back to the first switch so as to maintain the state of ON. When the state is changed from ON to OFF, a pulse of additional signal light is inputted. Due to the foregoing, the two states of ON and OFF can be stably maintained.

Abstract: An extended depth of field is achieved by a computational imaging system that combines a multifocal imaging subsystem for producing a purposefully blurred intermediate image with a digital processing subsystem for producing a recovered image having an extended depth of field. The multifocal imaging system exhibits spherical aberration as the dominant feature of the purposeful blur. In an aspect, a central obscuration of the multifocal imaging subsystem renders point-spread functions of object points more uniform over a range of object distances, however, the system may not include a centrally obscured aperture to achieve intended results. An iterative digital deconvolution algorithm for converting the intermediate image into the recovered image based on maximum entropy involves a metric parameter that speeds convergence, avoids stagnations, and enhances image quality.

Abstract: A nano-optic device comprises a plurality of subwavelength apertures in a metal film or between metal islands. The device is adapted to shape a radiation beam transmitted there through. For example, beam shaping includes at least one of beam focusing, beam bending and beam collimating.

Abstract: A tunable imaging sensor includes a housing with four lenses mounted on a front side. A removable or rotatable filter plate/wheel fits inside the enclosure adjacent the lenses, with a camera plate holding four CMOS or CCD imagers fitting inside the enclosure adjacent the filter plate/wheel. The filter plate includes four filters, one for each lens, while the filter wheel includes sixteen filters which are rotated into position so that four filters are always aligned with the lenses and imagers. Rotating the filter wheel provides sixteen different filter combinations for the sensor. The images from each of the imagers are processed to form a composite image.

Abstract: An improved dual-filter lens for protective eyewear that combines a first filter for blocking essentially 100% of UV light, and second filter for filtering blue light. The first filter may comprise a multi-layered dielectric mirror layer 14 or Rugate filter 50, and the second filter may comprise dye-impregnated lens layer(s) 16, 18 or Rugate filter 50. The first filter blocks essentially 100% of UV light, while the second filter establishes an increasing transmission profile that cuts on sharply at approximately 415 nm, and establishes an increasing transmission profile between approximately 415 nm to about 475 nm. The cut-on slope rises approximately 0.15% in transmissivity for every nanometer of increasing wavelength change, with a maximum filtering effect within the 440-465 nm range. These dual filters provide a balanced light transmission profile that reduces harmful light transmission and prevents macular degeneration, cataracts and other ocular injuries, while still preserving visual acuity.

Abstract: A color lens (10) includes a lens body (100) having two opposite surfaces (110, 120). A nano-material layer (130) is formed on one of the surfaces. An anti-reflect layer (140) is formed on the nano-material layer. A protect layer (150) is formed on the anti-reflect layer configured for protecting the nano-material layer and the anti-reflect layer. The nano-material layer is comprised of paint material particles (132) and color pigment.

Abstract: Optical signal-to-noise ratio (OSNR) monitoring methods and apparatus are described. A tunable optical filter filters an optical channel containing an optical signal and noise. The total signal and noise power at the output of the filter is measured as the transmittance passband of the filter is varied and the maximum and minimum powers are determined. The ratio between the maximum and minimum powers is then used to determine the OSNR of the optical channel, which, for example, can be a wavelength channel in a wavelength division multiplexing (WDM) system. The ratio of the maximum signal power to the minimum signal power and the ratio of the maximum noise power to the minimum noise power are pre-determined based on the signal modulation format type and filter passband characteristics.

Abstract: A display device includes an optical region containing a plurality of pigment grains. Each of the plurality of pigment grains formed by a plurality of pigment molecules encapsulated in an inorganic material, and each of the plurality of pigment grains has a grain size not greater than 70 nm.

Abstract: An auto-focusing image-forming lens set, which includes a first optical system, a second optical system and an image forming face arranged in line along an optical axis. The first optical system has a predetermined number of convex lenses arranged along the optical axis, and defines with image forming face a fixed distance.

Abstract: In certain aspects, the disclosure relates to an imaging system, particularly an objective or an illumination device of a microlithography projection-exposure apparatus having an optical axis (OA), with at least one optical element of an optically uniaxial crystal material whose optical crystallographic axis is substantially parallel to the optical axis (OA) of the imaging system and which at a working wavelength has an ordinary refractive index no and an extraordinary refractive index ne, with the extraordinary refractive index ne being smaller than the ordinary refractive index no; wherein the optical element is arranged in the ray path pattern in such a way that, at least for rays of the working wavelength which meet the optical element at an angle that falls within an angular range from the optical axis, the p-polarized component is reflected more strongly than the s-polarized component.

Abstract: A color contrast enhancing lens made from adhering two different lenses and a membrane together. It includes a color enhancing lens whose specific component will selectively absorb the yellow light in the visible spectrum, which enhances the user vision by enhancing the distinction between red and green. It also includes an ultraviolet blocking lens whose special compounds will absorb the majority of violet light and a part of blue light. It also includes a light polarization membrane whose special structure can reduce strong light. It can also absorb the majority of violet light and keep a low transmission rate of blue light, thus reduced the retina injury caused by overexposure to blue light. It can also block the invisible ultraviolet and reduce strong light. So while the users' eyes are protected, they can also enjoy their view.

Abstract: The invention provides an electro-optical device capable of improving a high light projection efficiency to the outside while maintaining sealing ability for providing high recognition of vision. An organic electroluminescence display can include a light permeable substrate, and an organic electroluminescence element having a luminous layer and positive hole transfer layer interposed between a pair of electrodes. Additionally, a low refractivity film having a lower refractivity than the substrate, and a seal layer for blocking the air from invading from the substrate side to the organic electroluminescence element are laminated between the substrate and electrode of the organic electroluminescence element.

Abstract: A thermal barrier apparatus includes a lens cell with a vacuum chamber, the lens cell having opposing lenses, and a one-way gas valve coupled to the lens cell to allow venting of the vacuum chamber in response to thermal expansion of gas in the vacuum chamber.

Abstract: An image sensing device is disclosed having a die formed with an array of photosensing sites and a structure of optical material having infrared absorbing characteristics formed over the photosensing sites. An embodiment is disclosed in which the structure of optical material having infrared absorbing characteristics is formed as an array of microlenses for directing visible image light onto the photosensing sites and at the same time filtering out infrared wavelengths that interfere with image capture. Alternatively, the structure may be designed to filter out other ranges of wavelengths outside of the visible spectrum.

Abstract: An optical filter applied to a display apparatus, disposes on a substrate with transparency and has a maximum absorption wavelength ? in a wavelength range of 575±20 nm in connection with a wavelength range from 450 to 650 nm. The optical filter satisfies a relationship, 0.65?T1(?)/T2(?)?0.90 where T1 (?) is a transmittance at a central part of the substrate at the maximum absorption wavelength ?, and T2 (?) is a transmittance at a peripheral part of the substrate at the maximum absorption wavelength ?. The optical filter also satisfies a relationship, 0.90?(T1 (?1)/T2 (?1))/(T1 (?)/T2 (?))?1.05 with respect to transmittances wherein ?1 is each wavelength 450 nm, 530 nm and 630 nm, and ? is the maximum absorption wavelength.

Abstract: An aperture comprising a round filter portion and at least one annular filter portion is provided. The round filter portion and the annular filter portion are forming a round zone. A transmission wavelength range of the round filter portion is larger than a transmission wavelength range of the annular filter portion. A projection lens system with the aperture can produce images having higher brightness of the images and better image quality.

Abstract: A detection device for an optical configuration, in particular for a confocal microscope, with a detector, a pinhole aperture 2 arranged before the detector in a beam path 1 of the detection light, and a lens 3 for focusing the detection light on the pinhole aperture 2 arranged before the pinhole aperture 2, is implemented with regard to high resolution and detection efficiency even in the presence of varying wavelengths such that a means 4 for wavelength-dependent illumination of the lens 3 is arranged before the lens 3 in the beam path 1. Furthermore, a wavelength-dependent beam expander 6 as well as a confocal microscope with such a detection device are disclosed.

Abstract: An optical element is disclosed which has a reflection suppressing function and a color balance correcting function in a minute periodic structure. The optical element has a base member and a minute periodic structure which is provided on a surface of the base member and has a period smaller than a wavelength of incident light on the optical element. The minute periodic structure has a characteristic that the reflectance of light a first wavelength on a short wavelength side in a wavelength range of the incident light is lower than the reflectance of light at a second wavelength on a long wavelength side in the wavelength range of the incident light.

Abstract: An anti-reflection coating is formed on an optical surface of an optical member for reducing the amount of light rays reflected from the optical surface. For light rays in a wavelength range from 400 nm to 700 nm, the anti-reflection coating has a reflectance of 0.5% or less if the light rays are incident on the optical surface at angles within a range from 0 to 25 degrees, and it has a reflectance of 3.5% or less if the light rays are incident at angles within a range from above 25 degrees to 60 degrees.

Abstract: An image pickup system includes one or more optical elements, wherein an infrared cut coating in which a maximum value of reflectance at the wavelength ? of 800 to 1200 nm is 30% or more, is formed on at least two optical surfaces of the optical elements.

Abstract: An optical component (10a) for at least two pencils (4, 5) of rays has at least one one-piece element (1, 2) of inorganic optical material and at least two segments (6, 7) which are coordinated with the pencils of rays and of which the first segment (6) is substantially surrounded by the at least one second segment (7). According to the invention, a depression (8a) is provided between the first and the at least one second segment (6 and 7), respectively. This is formed in such a way that the first segment (6) is substantially optically shielded from the at least one second segment (7) and is held by means of at least one material bridge from the second segment with a stable attitude thereto.

Abstract: A projection lens for use with LCD panels is provided. The lens has a first lens unit which includes a strong negative lens element having an aspherical surface which provides distortion correction, and a second lens unit which includes a first lens subunit separated by an airspace from a second lens subunit, wherein the first lens subunit has a strong positive power and the second lens subunit has a weaker power. The second lens subunit can include a negative lens element, followed by a positive lens element, followed by a plastic lens element having an aspherical surface. The projection lens has a field of view of at least 35° so that the overall projection lens system has a compact size.