Abstract: An optical module is configured with a combination of a single-mode oscillating light source and an optical filter. In this optical module, the single-mode oscillating light source outputs a single-mode, frequency-modulated signal. Further, the optical filter converts the frequency modulation to an amplitude modulation. And, the single-mode oscillating light source and the optical filter are packaged without active alignment on the same substrate. Accordingly, it is possible to realize an optical module in a simple and low-cost configuration by packaging the single-mode oscillating light source and the optical filter by passive alignment, without active alignment, on the same substrate, and by using a simple optical filter such as a waveguide ring resonator, which converts a frequency modulation to an amplitude modulation.

Abstract: A simple and convenient sensor and measuring apparatus utilizing the optical interference effect of an optical thin film capable of measuring the binding between biochemical substances at a high throughput and having alkali resistance. An optical thin film of silicon nitride is disposed on the first surface and the rear surface of a silicon substrate, and the thickness of the silicon nitride film is modified in a direction parallel to the film. A portion of the thin film with increased thickness is used as a sensor upon which a probe is disposed, and over which a sample-containing solution is caused to flow. The binding between the probe and biochemical sample is detected based upon the change of the intensity of reflected light.

Abstract: An optical tunable filter is provided including a first substrate having light transmission properties and having a movable part and a supporting member that movably supports the movable part and having a smaller thickness than the movable part, a second substrate having light transmission properties and opposed to the first substrate, a first gap and a second gap provided between the movable part and the second substrate, an interference part causing interference between the movable part and the second substrate through the second gap and a drive member changing an interval of the second gap by moving the movable part to the second substrate by making use of the first gap.

Abstract: A distributed Bragg reflector includes a first layer formed to be a first thickness, and a second layer formed to be a second thickness. A method of forming a distributed Bragg reflector includes forming a first layer to be a first thickness and forming a second layer to be a second thickness. The first and second thicknesses are determined using a wavelength that is adjacent to a center wavelength of an optical band of the distributed Bragg reflector.

Abstract: A tunable filter including; a fixed substrate provided with a fixed reflecting film and capable of transmitting light having a shorter wavelength than infrared light; a movable substrate provided with a movable section equipped with a movable reflecting film and disposed to the fixed substrate so that the movable reflecting film and the fixed reflecting film faces each other with a predetermined length of gap; and a drive section for varying the length of the gap by displacing the movable section with respect to the fixed substrate, wherein light entering the gap from the outside is repeatedly reflected by the movable reflecting film and the fixed reflecting film for outputting light having a wavelength corresponding to the length of the gap, and the movable section is provided, at an area to which the movable reflecting film is disposed, with a light transmitting section capable of transmitting light having a shorter wavelength than infrared light and for inputting/outputting light from/to the outside.

Abstract: In an anti-reflective film including alternating layers of high refractive-index layers and low refractive-index layers, by designing such that a designed central wavelength ?0 is within a wavelength range of 141 nm to 189 nm, and that when the first to eighth layers as counted from a substrate have optical film thicknesses d1 to d8 respectively, the equations of: 0.45?0?d1?0.65?0; 0.05?0?d2?0.20?0; 0.29?0?d3?0.49?0; 0.01?0?d4?0.15?0; 0.05?0?d5?0.20?0; 0.23?0?d6?0.28?0; 0.23?0?d7?0.28?0; and 0.23?0?d8?0.28?0 are satisfied, the anti-reflective film can be formed so as to have a low reflectance for a light incident at such a large angle as 30 degrees or more, without increasing the whole thickness of the film.

Abstract: Birefringent optical films have a Brewster angle (the angle at which reflectance of p-polarized light goes to zero) which is very large or is nonexistent. This allows for the construction of multilayer mirrors and polarizers whose reflectivity for p-polarized light decreases slowly with angle of incidence, are independent of angle of incidence, or increase with angle of incidence away from the normal. As a result, multilayer films having high reflectivity (for both planes of polarization for any incident direction in the case of mirrors, and for the selected direction in the case of polarizers) over a wide bandwidth can be achieved.

Abstract: The invention provides a dichroic mirror having a transmission characteristic in which a step due to splitting of P-polarized and S-polarized light can be reduced and having a fluorescence-transmitting band extending to long wavelengths. The invention also provides a fluorescence filter set that can be constructed of environmentally conscious glass materials that do no use harmful substances, such as lead, and a fluoroscopy apparatus including such a fluorescence filter set. The dichroic mirror comprises a transparent substrate and a dielectric multilayer film formed by alternately laminating high-refractive-index layers and low-refractive-index layers on the transparent substrate. The dielectric multilayer film includes from 50 to 150 alternately laminated high-refractive-index layers and low-refractive-index layers each having an optical film thickness from 1.5?0/4 to 2.

Abstract: In an optical filter, a thin film is formed by laminating low refractive index layers alternatingly from a substrate side with high refractive index layers. The thin film is provided with first, second, and third laminated portions. In the first laminated portion, the refractive indices of the high refractive index layers become gradually higher. In the second laminated portion, the refractive indices of the high refractive index layers are substantially equal to the highest refractive index of the high refractive index layers constituting the first laminated portion. In the third laminated portion, the refractive indices of the high refractive index layers become gradually lower, and the refractive indices of the low refractive index layers are substantially equal to the lowest refractive index of the low refractive index layers constituting the second laminated portion.

Abstract: Method for limiting the amount of radiation impinging on a radiation sensitive detector (RSD) responsive to signals having infrared wavelengths of approximately 3 to 14 microns. Method includes: directing radiation signal through prism toward RSD; permitting radiation signal to impinge upon RSD when radiation is below predetermined threshold; and directing radiation associated with radiation signal but of different wavelengths from signals of interest on path external to prism, to initiate limiting of radiation impinging upon RSD when predetermined threshold is exceeded. Also, Total Internal Reflection device including prism having thin film coated on back surface of prism. Material making up prism and thin film are selected so that, in presence of radiation having intensity less than certain threshold, refractive index of thin film is lower than that of prism, and when radiation has intensity higher than that certain threshold, refractive index of thin film is higher than that of prism.

Abstract: The present invention provides an illumination system and projection system using the same. The present invention can eliminate the reflective light on the internal optical surface of the optical system, using the phase plate and linear polarizer, in the color sequential driving of illuminating at least two colors on the single display panel at a random moment. The phase plate converts the incident light from a linearly polarized light to a circularly polarized light, and vice versa. And, the linear polarizer transmits the linearly polarized light of the incident light in the specific direction. Therefore, the present invention prevents the degradation of color purity generated from the mutual intrusion of light of at least two colors, thereby enhancing quality of color image.

Abstract: In an optical filter, a thin film is formed by laminating low refractive index layers alternatingly from a substrate side with high refractive index layers. The thin film is provided with first, second, and third laminated portions. In the first laminated portion, the refractive indices of the high refractive index layers become gradually higher. In the second laminated portion, the refractive indices of the high refractive index layers are substantially equal to the highest refractive index of the high refractive index layers constituting the first laminated portion. In the third laminated portion, the refractive indices of the high refractive index layers become gradually lower, and the refractive indices of the low refractive index layers are substantially equal to the lowest refractive index of the low refractive index layers constituting the second laminated portion.

Abstract: In an optical filter, a thin film is formed by laminating low refractive index layers alternatingly from a substrate side with high refractive index layers. The thin film is provided with first, second, and third laminated portions. In the first laminated portion, the refractive indices of the high refractive index layers become gradually higher. In the second laminated portion, the refractive indices of the high refractive index layers are substantially equal to the highest refractive index of the high refractive index layers constituting the first laminated portion. In the third laminated portion, the refractive indices of the high refractive index layers become gradually lower, and the refractive indices of the low refractive index layers are substantially equal to the lowest refractive index of the low refractive index layers constituting the second laminated portion.

Abstract: The anti-reflection film has reflectance minimums in at least prime colors. The reflective display medium has the reflectance minimums in at least the prime colors. The light emitting display medium has the reflectance minimums in at least the prime colors, and having light emission maximums in the prime colors. The organic EL device has the light emission maximums in the prime colors. The liquid crystal monitor has the reflectance minimums in at least the prime colors, and uses as a supplemental light source the organic EL device.

Abstract: New constructions of multilayer optical films, laminates thereof, and cards incorporating same are disclosed. In a card, the multilayer optical film can be sandwiched between relatively thick polymer layers using adhesive layers that are at least 0.5 mils thick but that may collectively account for no more than 3 mils of thickness. The cards can if desired be highly transmissive in the visible yet highly opaque in portions of the infrared. The resulting cards can have reduced angel hair formation during card stamping, increased resistance to delamination, and reduced haze.

Abstract: In an optical filter, a thin film is formed by laminating low refractive index layers alternatingly from a substrate side with high refractive index layers. The thin film is provided with first, second, and third laminated portions. In the first laminated portion, the refractive indices of the high refractive index layers become gradually higher. In the second laminated portion, the refractive indices of the high refractive index layers are substantially equal to the highest refractive index of the high refractive index layers constituting the first laminated portion. In the third laminated portion, the refractive indices of the high refractive index layers become gradually lower, and the refractive indices of the low refractive index layers are substantially equal to the lowest refractive index of the low refractive index layers constituting the second laminated portion.

Abstract: In an optical filter, a thin film is formed by laminating low refractive index layers alternatingly from a substrate side with high refractive index layers. The thin film is provided with first, second, and third laminated portions. In the first laminated portion, the refractive indices of the high refractive index layers become gradually higher. In the second laminated portion, the refractive indices of the high refractive index layers are substantially equal to the highest refractive index of the high refractive index layers constituting the first laminated portion. In the third laminated portion, the refractive indices of the high refractive index layers become gradually lower, and the refractive indices of the low refractive index layers are substantially equal to the lowest refractive index of the low refractive index layers constituting the second laminated portion.

Abstract: In a chromatic dispersion and dispersion slope compensating apparatus according to the present invention, a WDM light which has been angularly dispersed to a first direction by a VIPA plate, is angularly dispersed to a second direction vertical to the first direction by a diffraction grating, and optical signals of respective wavelengths output from the diffraction grating are reflected by any one of a plurality of three-dimensional mirrors having reflective surfaces of curved shapes different from each other, to be returned to the VIPA plate. Thus, with a simple control mechanism in which the plurality of three-dimensional mirrors are moved to only the second direction, an apparatus capable of variably compensating for the chromatic dispersion and the dispersion slope independent of each other can be provided.

Abstract: A stackable rack may comprise: at least two rails, a cross-section of each rail having a shape resembling a staircase, first step portion of which represents a first surface upon which a reflector can be disposed; and a second step portion of which represents a second surface which can support another rail. A method of making a narrow band x-ray filter may comprise: providing a substrate; and stacking one or more reflection units in succession upon the substrate, each reflection unit including a rack (such as mentioned above) and a reflector held by the rack. An apparatus to produce a substantially narrow band x-ray beam may include such a filter. An apparatus to make an x-ray image of a subject may include: the apparatus to produce a substantially narrow band x-ray beam, e.g., as set forth above, and an x-ray detector arranged to receive the narrow band x-ray.

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: In a dispersion slope compensator of the invention, angular dispersion of a WDM light in which the angular dispersion is already performed in a first direction (Y-axis) with a VIPA plate is performed in a second direction (X?-axis) perpendicular to the first direction with a diffraction grating, and the WDM light is reflected from a three-dimensional mirror and returned to the VIPA plate side. At this point, the three-dimensional mirror is mounted on a rotating stage while placed on a linear-moving stage, which moves the three-dimensional mirror in parallel in the second direction. Thereby, the rotating stage can adjust an angle of a reflection plane of the three-dimensional mirror with respect to an optical axis of the light focused with a lens, which allows optical axis shift of the reflected light to be corrected in the three-dimensional mirror according to setting of a chromatic dispersion compensation amount.

Abstract: An ND filter is made of a transparent substrate having a plane. An optical film is formed on the plane of the transparent substrate. The optical film has a lamination structure including a light absorption film and a dielectric film, and has a variable transmission density. A thickness of either the light absorption film or the dielectric film of the lamination structure is changed in an in-plane direction of the transparent substrate so that the transmission density of the optical film is controlled to vary in the in-plane direction. The light absorption film is composed of a material selected from Ti, Cr, Ni, NiCr, NiFe, NiTi and a mixture thereof, and the dielectric film is formed of SiO2, Al2O3 or a compound thereof.

Abstract: Several embodiments of multi-bandpass filters for processing optical signals are shown. The filters may include a transparent substrate with a thin film superimposed thereon. The thin film may have mirror layers and cavity layers, and may have multiple kinds of dielectrics with different refractive indices. The optical film may have a thickness that is a quarter of a reference wavelength, so as to form a plurality of Fabry-Perrot interferometer structures, and may have multiple groups of superimposed mirror and cavity layers depending on the desired effect. By using the described filters, the isolation between a plurality of the transmission bands can be sufficiently large, and separation of lights in a plurality of different wavelength regions can be carried out through a single multi-bandpass filter.

Abstract: The reflex-type screen includes an aluminum film reflecting layer for reflecting incident light, a lower adhesive layer which is made of adhesive agent, a polarization layer for transmitting the polarized light, a upper adhesive layer which is made of adhesive agent, and a surface diffusion layer for transmitting a part of the incident light and diffusing and reflecting anther part of the incident light, and the upper adhesive layer includes a diffusing agent dispersedly.

Abstract: An optical filter includes a transparent substrate, a first film stack and a second film stack. The first and second film stacks each includes a number of high refractive index layers and a number of low refractive index layers alternately stacked one on another. The first film stack is defined as (HL)7(0.76H0.76L)6, and the second film stack is defined as 0.5(HL)(1.3H1.3L)9(HL)8, wherein, H represents a high refractive index layer having a base optical thickness equal to one fourth of a first reference wavelength associated with the optical filter, L represents a low refractive index layer having a base optical thickness equal to one fourth of a first reference wavelength associated with the optical filter, the expression enclosed in each parenthesis represents a filter cavity, and the superscript represents the number of repetition of the expression enclosed in that parenthesis.

Abstract: An indium tin oxide layer is formed on a glass substrate, and then a silicon nitride layer, an amorphous silicon layer and an n-type silicon layer are sequentially formed on the indium tin oxide layer to serve as a color filter. Thicknesses and processing conditions of the above layers are adjustable for providing various color filters, such as black matrixes, reflective red color filters, reflective green color filters, and reflective blue color filters.

Abstract: Provided is a Fabry-Perot type wavelength tunable optical filter, comprising a first mirror; a second mirror located over the first mirror; a driving body located over the first mirror, and having both ends fixed to the first mirror through a spacer; a plurality of electrodes, each formed on both ends of the driving body; a rod structure connecting a center of the driving body and the second mirror; a plurality of fixing means, each fixed to the first mirror at both sides of the rod structure through the spacer; and a plurality of elastic bodies connecting the rod structure with the plurality of fixing means and acting as a rotational axis. And the mirror is driven by the rod structure acting as a lever that has an elastic body as a rotational axis, when warping is generated by electro-thermal expansion, electromagnetic force or external force. Thereby the mirror can be driven in the larger wavelength tunable range and the low power consumption.

Abstract: In an optical element, a first mirror stack layer is formed on a substrate, and a spacer layer made of a paraelectric material having a secondary electrooptic effect is formed thereon through a first conductive thin film. Further, a second mirror stack layer is formed thereon through a second conductive thin film, and a coupling layer is formed thereon; thus, a basic structure of the optical element is formed. By changing a voltage to be applied between the first and second conductive thin films, it becomes possible to switch wavelengths of light to be transmitted through the optical element at a high speed.

Abstract: In an optical filter, a thin film is formed by laminating low refractive index layers alternatingly from a substrate side with high refractive index layers. The thin film is provided with first, second, and third laminated portions. In the first laminated portion, the refractive indices of the high refractive index layers become gradually higher. In the second laminated portion, the refractive indices of the high refractive index layers are substantially equal to the highest refractive index of the high refractive index layers constituting the first laminated portion. In the third laminated portion, the refractive indices of the high refractive index layers become gradually lower, and the refractive indices of the low refractive index layers are substantially equal to the lowest refractive index of the low refractive index layers constituting the second laminated portion.

Abstract: A wavelength-tunable optical filter includes a stationary mirror, a movable mirror disposed so as to face the stationary mirror, an actuating plate for actuating the movable mirror, and a peripheral supporting portion holding the actuating plate which are disposed above a base layer. The movable mirror is displaced by applying a voltage between the electrodes provided on the actuating plate and the base layer, and the actuating plate is disposed between the movable mirror and the peripheral supporting portion so as to be displaced due to an electrostatic force.

Abstract: An exemplary embodiment of the invention is an optical filter including a mirror including a plurality of first dielectric layers having a first index of refraction and a plurality of second dielectric layers having a second index of refraction. A plurality of the first dielectric layers have an integer quarter wave optical thickness and at least one of the first dielectric layers has a non-integer quarter wave optical thickness. A plurality of the second dielectric layers have an integer quarter wave optical thickness and at least one of the second dielectric layers has a non-integer quarter wave optical thickness. In an exemplary embodiment, the non-integer quarter wave optical thickness first layer and the non-integer quarter wave optical thickness second layer are determined so as to enhance transmission at a predetermined wavelength.

Abstract: A multi-layer film, wherein a ratio H/L or L/H, a balance in optical film thickness between a high-refractive-index layer H and a low-refractive-index layer L, is set within a range of 1.2–2.0 to bias a balance in thickness. A method of producing a dielectric multi-layer film, wherein, when a dielectric multi-layer film is formed, a proportion at which an optical film thickness is formed on a monitor substrate is made larger than usual. A UV reflection film, having a step difference in average transmittance of 70–90% at a specified half-power point and within a wavelength range of 430–450 nm, is provided on a substrate to form a UV cut filter. A UV reflection film at a specified half-power point, a step difference in average transmittance of 70–90% within a wavelength range of 430–450 nm, and a blue conditioning film having a transmittance of at least 90% within a wavelength range of 460–520 nm may be combined.

Abstract: There is provided a UV-reflective interference layer system for transparent substrates with broadband anti-reflection properties in the visible wavelength range. The interference layer system includes at least four individual layers. Successive layers have different refractive indices and the individual layers contain UV and temperature-stable inorganic materials.

Abstract: A plastic film comprising a transparent plastic substrate, a primer layer and a functional layer in this order wherein a refractive index ns of the substrate and a refractive index nH of the functional layer satisfy the following formula (1): 0.03?|ns?nH| and an average reflectance of light of from 540 to 550 nm in wavelength incidenting perpendicular onto a face of the film at an interface among the functional layer and the substrate is 0.02% or less.

Abstract: This invention relates to the field of thermophotovoltaic (TPV) direct energy conversion. In particular, TPV systems use filters to minimize parasitic absorption of below bandgap energy. This invention constitutes a novel combination of front surface filters to increase TPV conversion efficiency by reflecting useless below bandgap energy while transmitting a very high percentage of the useful above bandgap energy. In particular, a frequency selective surface is used in combination with an interference filter. The frequency selective surface provides high transmission of above bandgap energy and high reflection of long wavelength below bandgap energy. The interference filter maintains high transmission of above bandgap energy and provides high reflection of short wavelength below bandgap energy and a sharp transition from high transmission to high reflection.

Abstract: A wavelength tunable filter capable of being driven such that reflecting mirrors move more distant as well as closer by using the principle that a direction of the electromagnetic forces changes depending on the direction of the current flowing perpendicular to the external magnetic field. According to the wavelength tunable filter of the present invention, when it is necessary to have the wavelength tuning range and mechanical structure similar to the conventional wavelength tunable filter driven in only one direction, it is possible to lower the maximum force needed to drive the filter to a half, and reduce a probability that a pull-in phenomenon occurs. On the other hand, it is possible to reduce a wavelength change time of the element by increasing a resonant frequency when the same wavelength tuning ranges are implemented by using the same maximum driving forces.

Abstract: An optical system employs an optical coating on a substrate positioned relative to an optical collection system. The thickness of the coating is tailored such that light perceived by the collection system over prescribed angles of acceptance has a spectral content that is unchanged, or changed in a prescribed manner, from that entering the system when the sensor is oriented in the “look ahead” direction. The thickness of the coating is varied so that the wavelengths transmitted or reflected correspond to those required by a specific application. The invention is adaptable to system requirements that are centered about a single wavelength, or that require multiple wavelengths. The optical coating can take any of a number of forms, including stacked dielectric layers and rugate filters.

Abstract: The present invention relates to an electro-conductive, anti-reflection coating with the conventional half-wave, high-index layer sandwiched between two quarter-wave, low-index layers, in which the high-index, half-wave layer forms an electro-conductive layer, and in which the layer materials are selected such that an index ratio (high index/low index) is between 1.45 to 1.55 providing wide band widths for the anti-reflection coating. Preferably, the half-wave, electro-conductive, high index layer comprises indium titanium oxide providing a sheet resistance of less than 20 ohms/sq.

Abstract: A rearview mirror for motor vehicles having a layer substrate and a coating applied onto the back thereof, includes a reflective mirror coating and an intermediate layer, which may be made of a semiconductor material, arranged between the reflective mirror coating and the layer substrate. The value of the coloring parameter C=?{square root over (a02+b02)} is greater than 5 and the color change ?E resulting from a tilting of the rearview mirror by 45° from the perpendicular viewing angle as a function of the magnitude of the color value a0 according to CIE is not greater than ?E?½·(|a0|?8) wherein a0??20, ?E?6 wherein ?20?a0?0, and ?E?½·(a0+12), especially ?½·(a0?3), preferably ??·(a0?3), advantageously ??·(a0?3), wherein a0?0. The intermediate layer may be made of semiconductor material.

Abstract: The present invention provides a Fresnel lens sheet capable of successfully avoiding the “collapse”, “abrasion” and “moiré” problems. A Fresnel lens sheet constitutes, together with a lenticular lens sheet, a rear projection screen, which is mounted in the frame of a rear projection type display. The Fresnel lens sheet includes, on one surface of its substrate, a Fresnel lens part containing a plurality of lenses concentrically formed on one plane. The apexes of the lenses situated in the area between the center and the outer edge of the Fresnel lens part are flattened to give flat faces, and the widths of the flat faces of the lenses on the outer edge side are made greater than the widths of the flat faces of the lenses on the center side. The widths of the flat faces of the lenses are from 0 to 30 ?m.

Abstract: Optical devices such as backlight assemblies, according to the present invention include a multilayer optical film in which at least one of the layers comprises an oriented birefringent polymer. The multilayer optical film exhibits low absorptivity and can reflect light approaching at shallow angles as well as normal to the film.

Abstract: An improved light beam combiner is disclosed that creates a more uniform light source across the UV, Visual, and NIR range. It is an optical mechanical device made up of a standard high low dielectric thin film which, when placed at a 45 degree angle between a Deuterium lamp and a Halogen or Tungsten lamp, reflects the UV portion of a Deuterium lamp and passes the visual portion while also allowing the visual energy of a Halogen or Tungsten lamp to pass resulting in a more uniform light source for use in spectroscopy.

Abstract: We theoretically introduce a new type of optical all-pass filter based on guided resonance in coupled photonic crystal slabs. The filter exhibits near-complete transmission for both on- and off-resonant frequencies and yet generates large resonant group delay. We further show that such a filter can be mechanically switched into a flat-top band rejection filter. We also show that a single photonic crystal slab can also function either as optical all-pass transmission or flattop reflection filter for normally incident light. Both filter functions are synthesized by designing the spectral properties of guided resonance in the slab. The structure is extremely compact along the vertical direction.

Abstract: Optical bodies, comprising: a plurality of first optical layers comprising a first polymer composition that comprises (i) a polyester portion having terephthalate comonomer units and ethylene glycol comonomer units; and (ii) a second portion corresponding to a polymer having a glass transition temperature of at least about 130° C.; and a plurality of second optical layers disposed in a repeating sequence with the plurality of first optical layers. Also disclosed are optical bodies comprising: (a) a plurality of first optical layers, each first optical layer being oriented; and (b) a plurality of second optical layers, disposed in a repeating sequence with the plurality of first optical layers, comprising a blend of polymethylmethacrylate and polyvinylidene fluoride. Methods of making the above-described optical bodies, and articles employing such optical bodies are also provided.

Abstract: Within a method of making an optical interference filter, sample spectra and measurements of a predetermined characteristic associated with respective spectra are provided. Upon selection of an initial number of filter layers and a thickness for each layer, a transmission spectrum is determined. Each sample spectrum is applied to a regression formula that relates interaction of light with the transmission spectrum to a regression value. A comparison relationship between the calculated regression values and the sample measurements is defined and optimized, wherein thickness of each layer is an optimization variable.

Abstract: This optical filter provides a substrate and thin films. The thin films comprise an outermost layer portion and a refractive index varying portion. The refractive index varying portion is formed by laminating alternately towards the substrate a low refractive index layer having a refractive index that is higher than that of air and a high refractive index layer having a refractive index that is higher than the low refractive index layer. The outermost layer portion comprises an outermost low refractive index layer having a refractive index that is higher than that of air, a first outermost high refractive index layer having a refractive index that is higher than that of the outermost low refractive index layer, and a second outermost high refractive index layer having a refractive index that is higher than that of the first outermost high refractive index layer.

Abstract: High performance optical edge and notch filters and methods of making the same are disclosed. The multi-layer, thin-film optical edge filters have an edge steepness greater than about 0.8% as measured by dividing (a) the edge width from the 50% transmission wavelength to the optical density 6 (“OD6”) wavelength by (b) the 50% transmission wavelength. The optical edge filters also have an average transmission above about 95%. The notch filters exhibit a blocking of OD>6, very high transmission (>90%) outside the notch(es), and a narrow notch bandwidth comparable to that of holographic notch filters. The methods for making such filters accurately determine when deposition of each layer of the filter should terminate.

Abstract: High performance optical edge and laser-line filters and methods of making the same are disclosed. The optical edge filters have an edge steepness greater than about 0.8% as measured by dividing (a) the edge width from the 50% transmission wavelength to the optical density 6 (“OD6”) wavelength by (b) the 50% transmission wavelength. The optical edge filters also have an average transmission above about 95%. The laser-line filters have an extremely high transmission in the passband (greater than 90%), an extremely narrow transmission bandwidth, and achieve blocking with an optical density (OD) greater than 5 at wavelengths that differ from the laser wavelength by less than 1% of the laser wavelength. The methods for making such filters accurately determine when deposition of each layer of the filter should terminate.

Abstract: The interferometric modulator of the invention includes a transparent substrate (refractive index: n0) 12, an optical thin film (complex index of refraction: N1=n1?i·k1) 13 provided on the transparent substrate 12, and an absorber layer (complex index of refraction: Ns=ns?i·ks) 14 opposed to the optical thin film 13, the distance of a gap to the optical thin film 13 being variable, wherein the relation n1>n0, k1?0 and ns>n0 is satisfied.

Abstract: Anisotropic multilayer thin-film coating that may be used in fabrication of various optical elements, such as polarizers, beam splitters, interference-polarizing light filters, polarizing mirrors, etc. The invention is aimed at creating a multilayer optically anisotropic structure, which contains at least one layer with high degree of anisotropy and perfect structure, whereas refraction indexes and thicknesses of all layers and their combination is selected according to the known law, determined by the purpose of the structure, such as to provide an interference extremum for at least one polarization of light. The technical result is the increase of effectiveness of transforming incident radiation, which corresponds to the functional purpose of the multilayer optically anisotropic structure, due to the high reproducible degree of amsotropy of at least one layer in the structure.