115 results about "Infrared cut-off filter" patented technology

PROBLEM TO BE SOLVED: To obtain a near-infrared ray cut filter which has a wide viewing angle, is superior in near-infrared ray cutting capability, has a low hygroscopicity, and is free from foreign matters and warpage.SOLUTION: The near-infrared ray cut filter includes a resin substrate (I) containing a compound (I) which has a structure derived from a compound expressed by a formula (I).

The invention provides a camera module which comprises a lens module, an infrared cut-off filter, an image sensor and a circuit board, wherein the circuit board comprises a first surface and a second surface; a first mounting hole is formed in the first surface; a second mounting hole which is coaxial and communicated with the first mounting hole is formed in the second surface; the diameter of the second mounting hole is larger than that of the first mounting hole; an inverted boss is formed at the periphery of the position, communicated with the first mounting hole, in the second mounting hole; the infrared cut-off filter is accommodated in the first mounting hole; the lens module is assembled to the first surface and located above the first mounting hole; and the image sensor is accommodated in the second mounting hole and fixed and connected with the inverted boss through a conductive adhesive. The invention further provides camera equipment.

The present invention provides a dual-spectrum camera system based on single sensor and an image processing method, and relates to the technical field of image collection. The system comprises a lens,an image sensor and a logic beam split module and an image fusion module which are connected in order; the image sensor comprises a RGB light-sensitive unit and an IR light-sensitive unit, a light-inpath of the RGB light-sensitive unit is provided with an infrared cut-off filtering layer; the image sensor receives incident light to generate original images and send the original images to the logic beam split module; and the logic beam split module performs conversion of the original images to divide the original image into a visible image and an infrared image and send the visible image andthe infrared image to the image fusion image to generate a fused image. The objective of the invention is to provide a dual-spectrum camera system based on single sensor and an image processing methodto allow the optical construction of the dual-spectrum camera system to be simpler so as to facilitate the more miniaturized size of the camera device and reduction of the cost and improve the imageeffect.

The invention discloses a mixing absorption type infrared cut-off filter and a preparation method thereof. The mixing absorption type infrared cut-off filter comprises a glass substrate; the upper surface of the glass substrate is provided with a coating adhesive layer possessing visible light absorption characteristics; the coating adhesive layer is provided with an antireflection film layer; the lower surface of the glass substrate is provided with an infrared cut-off film layer. The invention provides a visible region high transmittance and infrared band cut-off ultralow angle effect filter, which can realize lower edge aberration in wide angle incidence.

The invention discloses a portable electronic device and a camera module set thereof. The camera module set comprises a flexible circuit board which is adopted as a carrier, a sensor which is arranged on the flexible circuit board and is electrically connected with the flexible circuit board, an aluminum bracket which is arranged on the flexible circuit board and covers the sensor from above, and an infrared cut-off filter; the aluminum bracket comprises a first surface and a second surface which is opposite to the first surface; a photosensitive window which penetrates the first surface and the second surface is formed at the middle of the aluminum bracket; the first surface and the second surface are respectively provided with a first step groove and a second step groove which surround the photosensitive window by one turn; the first step groove is provided with a bottom surface which is opposite to the flexible circuit board; the second step groove is provided with a bearing surface which is parallel to the bottom surface of the first step groove; the bearing surface is separated from the bottom surface by a distance smaller than 0.3 mm; and the infrared cut-off filter is accommodated in the second step groove and abuts against the bearing surface. With the camera module set of the portable electronic device adopted, the miniaturization and high-pixel design of the portable electronic device can be benefitted, and image pickup performance can be improved.

Provided is a near-infrared cut-off filter with which angle of incidence dependency is alleviated and the visible light transmission band is expanded, as are the ultraviolet and near-infrared region rejection bands. The near-infrared cut-off filter comprises: a transparent substrate; and an optical multilayer film which is disposed upon at least one primary face of the transparent substrate, further comprising two or more types of films with different refractions of 2.0 or more, and a film with a refraction of 1.70 or less. With respect to spectrum characteristics in perpendicular entry conditions, the optical multilayer film further has a transmission region with an average transmission rate of 85% or more in the 400-700nm wavelength range, and rejection bands in the ultraviolet side and the near-infrared side with respective average transmission rates of 5% or less. The optical multilayer film has a transmission band configuration part for forming the transmission band, and a rejection band configuration part for forming the rejection band.

The invention provides a preparation method for a blue glass infrared cut-off filter. The method includes the steps that film system is selected according to transmittance and a preset transmittance of blue glass, and film coating is respectively carried out on two opposite surfaces of the blue glass by means of film materials according to the selected film system; a UV film is attached to the surface of one film; the blue glass is pasted to a cutting table of an ADT cutting machine through the UV film; the blue glass is cut at the cutting speed of 8 millimeters per second and at the revolving speed of 12000-18000 revolutions per minute. The method is achieved based on a blue glass film coating method, light splitting requirements of infrared cut-off filter can be met, the edge breakage rate of blue glass cutting can be effectively reduced through reasonable selection of blue glass cutting parameters, and thus the production yield of the blue glass infrared cut-off filter can be improved.

The invention provides a colored vein spectacle display system. The colored vein spectacle display system comprises a vein image processing device and a pair of intelligent spectacles, wherein a high-definition camera, a near-infrared light source and an imaging device are mounted on the intelligent spectacles; the high-definition camera comprises a visible light camera and a near-infrared light camera, a lens of the visible light camera is a near-infrared cut-off filter, and a lens of the near-infrared light camera is a visible light cut-off filter; the visible light camera and the near-infrared light camera are respectively connected with the input terminal of the vein image processing device; the vein image processing device fuses images input by both the visible light camera and the near-infrared light camera and then outputs the fused images to the imaging device; and the imaging device displays the images output by the vein image processing device on lenses of the intelligent spectacles. The colored vein spectacle display system allows direct vein observation and acupuncture treatment through the spectacles, is stronger is operability and therefore, is more conductive to product wide application.

The invention relates to a camera module and a bracket thereof. The bracket comprises a barrel, a mounting plate and a voice coil motor, wherein the barrel is provided with a first end face and a second end face; the mounting plate is provided with a first surface and a second surface; the mounting plate is arranged in the barrel; the first surface and the first end face are flush with each other, and construct a connection surface; the mounting plate is provided with a light hole penetrating through the first surface and the second surface; the light hole is used for accommodating an infrared cut-off filter of the camera module; the connection surface is used for connecting the voice coil motor of the camera module; the second end face is used for connecting a circuit board of the camera module; the mounting plate is provided with an air escape hole penetrating through the first surface and the second surface; the air escape hole is independent of the light hole, and is positioned in the periphery of the light hole; along a direction from the first surface to the second surface, a sudden change position exists on the air escape hole; and the inner diameter of the air escape hole in the sudden change position is smaller than the inner diameter of the air escape hole in first surface. Through adoption of the camera module with the bracket, the phenomena of glue slippage and glue leakage can be avoided effectively, and ideal imaging quality is realized.

The invention discloses an infrared cut-off filter with blue glass. The infrared cut-off filter comprises a substrate. The substrate is made of the blue glass, an infrared short-wave cut-off membrane stack is arranged on the front surface of the substrate, an infrared long-wave cut-off membrane stack is arranged on the rear surface of the substrate, and membranes made of high-refractive-index materials and membranes made of low-refractive-index materials are stacked alternately to form the infrared short-wave cut-off membrane stack and the infrared long-wave cut-off membrane stack. The two infrared cut-off membrane stacks with few membrane layers are combined with the blue glass, and the requirement on the high cut-off characteristic in an infrared spectrum interval ranging from 700 nanometers to 1100 nanometers is met by the infrared absorbing characteristic of the blue glass and the infrared reflection characteristic of the cut-off membrane stacks jointly under the condition that the substrate made of the blue glass is ultra-thin.

A near infrared cut-off filter has a repeating laminated structure of a high refractive index film, a medium refractive index film and a low refractive index film; the filter has a pass band in which the mean transmissivity is at least 85% in a wavelength range of 400 to 700 nm and a stop band in which the width of the region in which the mean transmissivity in a wavelength range of 750 to 1100 nm is no more than 10% is 100 to 280 nm.

The invention relates to a technical field of a filter, and more specifically relates to an infrared cut-off filter with a low-angle effect. The filter comprises a basement layer, and composite membrane layers are respectively coated on both side surfaces of the basement layer. High-index material films and low-index material films are alternatively formed the composite membrane layers. Compared with the filter in the prior art, the filter provided in the invention has the advantages of novelty and simple structure. According to the invention, using effects of blue glass basement is realized or approached by film coating. With the filter, production cost can be effectively reduced and using effect of the present ordinary infrared cut-off filter can be substantially improved. When the filter is used for light source inclination incidence or big cone angle incidence, not only center wavelength moves less but also spectrum curve can maintain good characteristics. With the filter, restriction is broken through, wherein the restriction is that the present infrared cut-off filter can not satisfy wide angle inclination incidence.

The invention provides an infrared cut-off filter which comprises a substrate and an infrared cut-off film. The infrared cut-off film is plated on the substrate. The substrate is made of sapphire. The infrared cut-off film is used for filtering infrared light rays in light rays, a film system structure of the infrared cut-off film is (xHyL)<eta>, the eta is larger than or equal to 30 and is smaller than or equal to 80, the x is larger than 1 and is smaller than 2, the y is larger than 1 and is smaller than 2, the eta is a positive integer, the H represents layers with high refractive indexes and the thicknesses equal to 1/4 of the central wavelength, the L represents layers with low refractive indexes and the thicknesses equal to 1/4 of the central wavelength, xH represents layers with high refractive indexes and the thicknesses equal to x/4 of the central wavelength, yL represents layers with high refractive indexes and the thicknesses equal to y/4 of the central wavelength, and the eta is the number of stacked cycles of the layers with the high refractive indexes and the layers with the low refractive indexes. The infrared cut-off filter has the advantage that the infrared cut-off film is plated on the substrate made of the sapphire, so that an infrared filtering effect of the sapphire substrate can be effectively improved. The invention further provides a lens module comprising the infrared cut-off filter.

The invention provides a lens module, comprising a lens barrel, a lens set arranged inside the lens barrel and a transparent lens cover. The lens cover is fixed at one end of the lens barrel, and is provided with an infrared cut-off filter unit.

The invention relates to a laser-assisted vehicle information shooting device and a shooting method. The device comprises a casing, wherein a number plate camera, a band pass filter, a panoramic camera, an infrared laser illuminator and an electronic control unit are mounted in the casing; the panoramic camera adopts a color-to-black camera equipped with an infrared cut-off filter and an infrared transmission laser filter; the band pass filter assists the number plate camera in recognizing number plate information; the infrared laser illuminator provides assisted infrared light supplementary lighting for the panoramic camera and the number plate camera; the panoramic camera and the number plate camera transmit image information to the electronic control unit which processes the information to obtain vehicle and number plate information. According to the provided laser-assisted vehicle information shooting device, the vehicle information, the number plate information and facial features of front-row driver and passenger in a vehicle are recognized by means of the infrared laser illuminator and double cameras, dazzling is avoided for a driver in a recognizing process, and potential safety hazards caused by hard light in the prior art are eliminated.

The invention relates to a method for measuring longitudinal distances of sight of human eyes. The method includes particular steps of 1, creating an eccentric photographic measuring device comprising a camera, an infrared light source, an infrared filter lens, a telescope, a human face support, an infrared cut-off filter and the like; 2, detecting pupil boundaries, acquiring pupil regions by means of processing by the aid of run algorithms and acquiring boundaries by means of equation fitting; 3, computing the internal brightness distribution of pupils, and computing ratios of certain longitudinal lengths of the pupil regions to the lengths of integral longitudinal axes; 4, measuring longitudinal distances, acquiring the longitudinal distances of the sight by the aid of pre-measurement calibration parameters and current brightness distribution conditions of the pupils by means of computing. Average values of gray values of the integral pupil regions are used as threshold values, and the certain longitudinal lengths of the pupil regions are larger than the threshold values. The method has the advantages that information of the longitudinal distances can be obtained during sight tracking, accordingly, the sight can be truly three-dimensionally tracked, and the method further can be used for improving the precision of the traditional two-dimensional sight tracking systems; the method is low in computational complexity, and quick measuring and real-time tracking effects can be realized.

The invention relates to a method for preparing an infrared cut-off filter, specifically comprising the steps of cutting, shaping, slicing, chamfering, grinding, double-sided chemical polishing, coating, and the like. An infrared cut-off filter prepared by the method has high quality. The rejection rate is low. The production efficiency is high.

A camera module according to an embodiment includes a lens barrel having a lens, a housing having an upper portion coupled with the lens barrel, a printed circuit board coupled to a lower portion of the housing and provided thereon with an image sensor and an infrared LED that emits infrared rays, and an infrared cut-off filter positioned above the lens barrel. The infrared cut-off filter is movable to inhibit the infrared rays from being incident into the lens barrel or to allow the infrared rays to be incident into the lens barrel.

The present invention is a compact lens system for use as a wide-field photographic objective with small format digital image sensors having a pixel dimension less than 0.010 mm. The f-number of the lens system is 2.9740, and the effective focal length of the system is 3.85 mm. The full angular field of view of the lens system is 61 degrees, and the chief ray incidence angles on the image plane are less than 18 degrees. The system comprises three plastic lenses, each having two aspheric surfaces. At least one of the aspheric surfaces in the system is coated with a multilayer infrared cut-off filter for blocking infrared wavelengths from the image sensors. The lens system has a reduced sensitivity to manufacturing tolerances, particularly lateral misalignment of optical elements and surfaces.

The invention relates to an infrared cut-off filter which comprises a basal body layer, a first film stack, a second film stack and a third film stack, wherein the first film stack, the second film stack and the third film stack are orderly formed on the basal body layer, are respectively and alternately formed by high refractive index materials and low refractive index materials and have different optical thicknesses. The invention also provides a lens die set which comprises the infrared cut-off filter.