55 results about "Dichroic filter" patented technology

The invention provides a flow cytometer multichannel detection device, which comprises a positive lens, a dichroic filter, a plane mirror and a detection assembly, and is characterized in that the positive lens is used for receiving an optical signal generated when laser irradiates on to-be-detected particles or cells, and adjusting the optical signal into a collimated light beam; the dichroic optical filter is arranged on one side of the positive lens in the horizontal direction and is used for separating the collimated light beam into transmission light and reflected light according to the wavelength; the plane mirror is arranged on one side of the dichroic optical filter in the vertical direction and is used for reflecting the reflected light again to enable the reflected light to be parallel to the transmitted light; the detection assembly comprises a first detection module used for receiving the reflected light and a second detection module used for receiving the transmitted light. A collimated light beam is divided into two parts of transmission light and reflected light by using a dichroic optical filter, so that the number of detection channels in a limited collimation distance is doubled, and the optical path design of multiple detection channels is met.

A light-emitting diode (LED) die, a wafer of LED dies, and methods of manufacturing at least one LED die are described. The LED die (1000) includes a semiconductor stack configured to emit a pump (blue) light when energized and a wavelength converter over the semiconductor stack. The wavelength converter converts some of the pump light to a converted light having a differing color. The LED die further includes a spatially inhomogeneous dichroic filter (blue DCF 1008) on the wavelength converter. Said filter is configured to at least one of: - increase reflection of the pump light in special regions of peak luminance, - increase reflection of the converted light in spatial regions of low luminance, - increase transmission in at least a portion of the converted light in spatial regions of peak luminance, or - increase transmission of the pump light in spatial regions of low luminance.

A light generator (1) comprising: - an optoelectronic device (11) configured to produce a first monochromatic beam (R1) so as to generate light (L1) at a first wavelength (λ1), - a phosphor layer (12) offset from said optoelectronic device (11) and configured to convert all or part of the first monochromatic beam (R1) into a second beam (R2) so as to obtain converted light (L2) at one or more second, higher wavelengths (λ2) and to diffuse it, characterized in that it comprises: - a first dichroic filter (13) configured to transmit the light (L1) emanating from the first monochromatic beam (R1) towards the phosphor layer (12) and to reflect the converted light (L2) by the phosphor layer (12), - a protective layer (15) disposed opposite the phosphor layer (12) on the side opposite the first filter Dichroic (13). Figure for the abstract: figure 1

A beam combining device, enabled to combine a first beam with a second beam of a different spectrum into a combined beam, where the combination may be obtained through a device comprising two antireflective coating, a dichroic filter coating, and a reflective coating arranged on a substrate.

An apparatus includes a dichroic combiner array (106) configured to combine multiple input optical beams (104) and generate an output optical beam (108). The dichroic combiner array includes multiple mirrors (112) and multiple dichroic filters (110). A first mirror is configured to reflect a first input optical beam towards a first dichroic filter, which is configured to combine the first input optical beam and a second input optical beam. A second mirror is configured to reflect a combined optical beam from the first dichroic filter to a second dichroic filter. A last dichroic filter is configured to generate the output optical beam. The apparatus also includes a beam dump array having multiple beam dumps (116) configured to terminate stray optical energy. The stray optical energy includes at least one of: (i) optical energy reflecting from at least one of the dichroic filters and (ii) optical energy transmitted through at least one of the dichroic filters.

The invention discloses a common-caliber common-view-field full-wave-band image space scanning hyperspectral imaging system which comprises a first main reflecting mirror, a view field eliminating stray light diaphragm, a secondary reflecting mirror, an image space scanning mirror, a turning reflecting mirror, a front color separation film, an imaging system, a rear color separation film and a spectrograph. A middle primary imaging off-axis two-reflection structure is adopted to realize large-aperture light path compression and collimation, an image space scanning mirror is arranged at an outgoing pupil, image space small-aperture scanning replaces an object space large-aperture scanning mirror to scan spectrum imaging to the ground, and the lightweight design of the system is realized; through twice light splitting arrangement of the front color separation film and the rear color separation film, a full-wave band spectrum is subdivided into eight common-view-field channels, a detection wave band can cover ultraviolet to very long wave infrared, and the bottleneck that different wave bands of an ultra-wide spectrum in a traditional mode cannot share the caliber and the view field is broken through; the problem that the size and the weight of a system are too large due to the adoption of an object-space large-aperture scanning mirror is solved, and regional full-spectrum hyperspectral image data in a staring mode are obtained.

The invention discloses a three-mode six-port assembly which comprises an optical fiber interface, a light emitting assembly, a light receiving assembly and an optical routing system. The optical transmitting assembly comprises a first transmitting assembly, a second transmitting assembly and a third transmitting assembly, the optical receiving assembly comprises a first receiving assembly, a second receiving assembly and a third receiving assembly, and the optical routing system processes first to third wavelength transmitting optical signals and fourth to sixth wavelength receiving optical signals and comprises a combined optical path and a branched optical path. The combined optical path is provided with a first dichroic optical filter and a second dichroic optical filter which are sequentially arranged, the optical axis of the first transmitting component is aligned with the transmission optical path of the first dichroic optical filter, the second transmitting component and the third transmitting component are respectively aligned with the reflection optical paths, and the combined optical path is coupled to the optical fiber interface through the lens; the branching light path is provided with third to seventh dichroic optical filters, the optical filters are sequentially arranged along the light path, and the first, second and third receiving assemblies are respectively aligned with the emergent light paths of the corresponding optical filters. The module is small in size, free of wavelength crosstalk, adaptable to multiple rates, low in power consumption, and excellent in bandwidth and performance of each port.

A kind of plating platinum metal film capillary, gas raman spectrum detection system and use method, plating platinum metal film capillary includes silica capillary and plating film, the length of silica capillary is 5 to 20 centimeters, inner diameter is 0.5 to 2 millimeters, the inner wall, outer wall and both side end face of silica capillary are evenly plated with plating film, plating film is mirror surface platinum film, in the gas raman spectrum detection system based on plating platinum metal film capillary, laser is processed after passing through precision grinding lens, optical fiber collimating coupler, narrow band filter, long focus best shape lens, dichroic filter, pinhole plate, and enters plating platinum metal film capillary, and Raman signal is generated by two interactions with gas in plating platinum metal film capillary by the reflection of second reflector.This design not only can carry out raman spectrum detection to the gas of strong corrosivity or / and strong oxidizability, but also can reflect Raman signal multiple times, effectively improves the collection rate and durability of system's Raman signal.

A light source includes a first LED to provide light of a first light wavelength spectrum along a first light path; a second LED to provide light of a second light wavelength spectrum along a second light path; a dichroic filter for passing light emitted from at least one of the first LED and the second LED and reflecting light emitted from at least one of the first LED and the second LED; an optical filter movable between a first position in which the optical filter receives light from the first light path and a second position of which the optical filter does not receive light from the first light path; a light output; a controller which is capable of switching the light source between a first mode for providing a first light to the light output and a second mode for providing a second light to the light output.

The invention belongs to the technical field of solid laser pumping, and discloses a solid laser timing pumping device based on a mechanical delay device, which comprises a pumping source, a total reflective mirror, a crystal disc, an output mirror and a double-color filter which are sequentially arranged along the direction of a light path, a pumping light beam emitted by the pumping source sequentially passes through the total reflective mirror, the crystal disc and the output mirror, and the output laser passes through the double-color filter to realize the separation of the pumping light and the laser beam; the mechanical delay device drives the crystal disc to rotate intermittently, and when the pumping source emits light beams to irradiate the crystal disc in the resonant cavity, the crystal disc is in a stop state; after the irradiation of the crystal disc in the resonant cavity in the period is finished, the crystal disc enters a rotating state; and before the pumping source enters the next period of irradiation, the crystal disc in the resonant cavity is changed to the next pumping part, so that the periodic timing pumping of the solid laser is realized. The heat dissipation efficiency of the disc type solid laser is improved, and the influence of the crystal heat effect on the laser is reduced.

Laser radar include two part objective lenses that are used for imaging a target and directing probe beams to the target. Portions of tracer beams that degrade target images are attenuated with dichroic filters that block central portions of tracer beams. Local oscillator beams can be produced with a mixing lens that directs probe beams through a polarizing beam splitter to focus at or on a waveplate so that portions are reflected from the waveplate as local oscillator beams. An imaging system that is confocal with a probe beam is coupled to provide target measurements or to establish a focus of the probe beam.

This application provides a beam combining light source device for an optomechanical system, comprising: an emission module including multiple monochromatic light sources, each with a different emission wavelength, and at least one of the monochromatic light sources being a large divergence angle light source; a collimation module including collimating lens groups corresponding one-to-one with each monochromatic light source, each collimating lens group including a condenser lens and a collimating lens arranged sequentially along the optical path; and a beam combining imaging module including at least two dichroic filters and a coupling lens, each dichroic filter being obliquely disposed at the intersection of the transmission optical paths of each parallel beam, used to combine parallel beams from different directions into a combined beam propagating along the same optical axis, and image it onto the receiving surface of the optomechanical system in a critical illumination manner. This application overcomes the physical performance bottleneck of the single-lens scheme, where light collection capability and collimation accuracy cannot be simultaneously achieved, realizing large-angle light collection and high collimation output under large divergence angle light source conditions.

The present invention relates to a dichroic filter that reflects visible light to shortwave infrared and transmits a broad spectrum of infrared light, and its manufacturing method. The dichroic filter uses a flat germanium substrate and a dichroic film system similar to a longwavepass filter. Germanium, zinc sulfide, and fluoride are used as the high and low refractive index materials for different reflective film stacks. A dichroic film is designed on the front surface of the substrate, combining different reflective film stacks to achieve broadband high reflectivity. An optimized matching layer reduces transmission passband ripple. A broad spectrum antireflection film is designed on the back surface of the substrate to achieve high transmittance in the transmission channel while minimizing residual reflection and eliminating stray light. During the preparation process, the dichroic filter utilizes appropriate deposition rates, substrate temperatures, and ion-assisted deposition of localized film layers to reduce thin film absorption and improve the environmental reliability of the filter. Measured reflectivity and transmittance curves show that the filter has high reflectivity in the 0.4-1.7 μm band and high transmission in the 2.1-2.4 μm shortwave infrared band and the 3.5-14 μm mid- and longwave infrared bands. It is suitable for spectral separation in visible-to-infrared multi-channel remote sensing systems.

The invention provides a light generating system (1000) comprising (i) one or more first light generating devices (110), one or more second light generating devices (120), a light transmissive housing (500) and a light filter (550) wherein: (I) the light transmissive housing (500) comprises a light transmissive material (505) wherein the light transmissive housing (500) comprises an upstream face (501) and a downstream face (502); wherein the light transmissive housing (500) defines a housing volume (507); (II) one or more first light generating devices (110) are at least partially disposed within the housing volume (507); wherein the one or more first light generating devices (110) are configured to generate first device light (111) having an intensity at one or more wavelengths within the visible wavelength range; wherein the one or more first light generating devices (110) comprise one or more LED filaments (115) (and wherein the first device light (111) comprises filament light); (III) the one or more second light generating devices (120) comprise one or more solid state light sources; wherein the one or more second light generating devices (120) are configured to generate second device light (121) having an intensity at one or more wavelengths within the visible wavelength range, the one or more wavelengths comprising at least one or more wavelengths within the blue-green wavelength range; (IV) the filter (550) comprises a dichroic filter; wherein the filter (550) is disposed within the housing (500); wherein the filter (550) is transmissive for at least a portion of the first device light (111) and reflective for at least a portion of the second device light (121) (in the blue-green wavelength range); wherein the one or more second light generating devices (120) are configured such that at least a portion of the second device light (121) (within the blue-green wavelength range) is reflected at the filter (550) in a direction away from the one or more first light generating devices (110); and (V) the light generating system (1000) configured to generate system light (1001) comprising one or more of (i) at least a portion of the first device light (111), and (ii) at least a portion of the second device light (121); and wherein the light generating system (1000) is configured such that, in a first mode of operation of the light generating system (1000), the system light (1001) is white light having a correlated color temperature in the range from 1500 K to 6500 K.

An optical device and an image projection apparatus including the same are disclosed. The optical device comprises: a dichroic filter including first and second color areas, the first and second color areas to reflect a portion and another portion of a plurality of colors of light from a first light source device in a first direction, respectively, and the second and first color areas to transmit a portion and another portion of a plurality of colors of light from a second light device, respectively; a diffusion wheel to transmit light incident from the dichroic filter upon rotation; a diffuser to diffuse light from the diffusion wheel; a reflection mirror to reflect light from the diffuser in a second direction; and a flyeye lens between the diffuser and the reflection mirror. Accordingly, it is possible to simplify the configuration of the optical device and to achieve high brightness performance.

Disclosed is a method for the production of a visual light transmitting and infra-red reflecting composite including, adhered to one side of a transparent support, at least one dichroic filter (DF) which filter comprises at least one metal layer that is sandwiched in between two layers of dielectric metal oxide, dielectric compound or dielectric salt, wherein the layers of the filter are deposited sequentially onto the transparent support using sputter-deposition in at least one sputtering chamber, wherein the process comprises, in the sputtering chamber where at least one of the dielectric layers is sputtered, the introduction of at least one inert gas and water, and wherein the molar flow of the water that is introduced into the sputtering chamber is in the range of 1% to 30% relative to the total molar flow of inert gas that is introduced into the same sputtering chamber.

A headset includes a first display, a second display that is smaller than the first display and has lower resolution than the first display, and a dichroic filter positioned to pass visible light from the first display toward the eye and reflect visible light from the second display toward the eye. Pixel data control circuitry is coupled to darken the first display while simultaneously activating the second display to display a pattern for testing visual acuity, responsive to a first visual acuity test selection. Other aspects are also described and claimed.

The invention relates to a method for a flow cytometer. The method comprises the following steps: emitting fluorescence of different wavelengths generated by different fluorescent substances from an optical fiber, wherein the fluorescent substances are attached to different particles in a sample fluid; magnifying an image size from an end of the optical fiber to a first bi-color filter of a first plurality of bi-color filters arranged in a row in the first decomposed imaging array; reflecting fluorescent light of a first wavelength range between the plurality of filters and the first plurality of micromirrors to collimate the fluorescent light on odd number filters and reimage the fluorescent light on even number filters; passing a different wavelength range of the fluorescent light of the first wavelength range at each of the first plurality of dual-color-direction filters to decompose a wavelength spectrum of the fluorescent light of the first wavelength range; and detecting fluorescence in each different wavelength range in the first wavelength range associated with each fluorescent substance labeled to the particles to count the number of each different particle in the sample fluid.

The utility model provides a light source which is composed of a main light-emitting device, a wavelength conversion device, a reflection device and a dichroic filter, the reflection device and the wavelength conversion device are arranged on the two sides of the dichroic filter respectively, and the light-emitting device and the wavelength conversion device are arranged on the two sides or the same side of the dichroic filter. The three-piece projector has the advantages that through the combination of the dichroic optical filter, the wavelength conversion device and the reflection device, after light emitted by a single main light-emitting device is separated, part of the light is reflected by the reflection device, part of the light is subjected to wavelength conversion and then is combined and output, and the problems that in the prior art, a three-piece projector is large in number of light-emitting devices, the structural space in the projector is limited, and cost is high are solved. The structure is complex, and the production cost is high.

The present invention relates to the field of spectral detection technology, and particularly to a spatial heterodyne dual-channel polarization Raman spectroscopy testing device and method, including: a laser for emitting a laser beam; a half-wave plate, a liquid crystal polarization rotator, a dichroic filter, and an imaging objective lens sequentially arranged along the optical path of the laser beam to the target to be measured; a spatial heterodyne dual-channel interference module arranged in the transmission optical path between the target to be measured and the dichroic filter; a controller; wherein, the liquid crystal polarization rotator is connected to the controller. The present invention uses a liquid crystal polarization rotator to replace the traditional rotating polarizer and wave plate, with fewer optical elements and no mechanical moving parts inside, realizing the polarization modulation of the excitation laser signal and the Stokes Raman spectrum, having a fast modulation speed, a stable structure, and good robustness; in addition, a spatial heterodyne interference dual-channel interference module is used to realize the synchronous detection of Raman spectra in two perpendicular polarization states, improving the detection efficiency.

This imaging device (2) includes a means for detecting electromagnetic radiation (4) comprising a first and a second detection zone (6, 8) distinct and respectively sensitive to a first and a second spectral band of electromagnetic radiation, the device (2) comprising an optical system (10) defining a dioptric channel (12) configured to direct the electromagnetic radiation included in the first spectral band towards the first detection zone (6), a catadioptric channel (14) configured to direct the electromagnetic radiation included in the second spectral band towards the second detection zone (8), and comprising a dichroic filter (16) disposed both on the dioptric channel (12) and on the catadioptric channel (14) and configured to transmit the electromagnetic radiation included in the first spectral band and to reflect the electromagnetic radiation included in the second spectral band.Figure for the summary: Fig 3.

The invention relates to laser beam shaping, intended to achieve a controlled intensity distribution, typically a flat-topped distribution, by means of a plurality of laser beam sources having a non-uniform beam intensity distribution (incident Gaussian laser beam in the visible, infrared or ultraviolet spectrum or other higher-order multi-transverse mode). The laser beam homogenization-expander uses a primary beam shaper element or light pipe (light integrator), and a second beam shaper unit or microlens array (MLA), i.e., a second light integrator defining a flat-topped intensity distribution output, to provide a second homogenization level. The invention also includes several optical devices, such as a light diffuser, a mirror, a dichroic filter, a beam shaping lens, a light pipe, and a microlens, to achieve good homogenization at the desired output angle. The invention is designed as a laser source that fully integrates / mixes one or more wavelengths, such as red, green and blue, but can also integrate other wavelengths in the visible / invisible spectrum. If multiple wavelengths are used as the initial laser source, the light engine output can provide good homogenization and color mixing with little noticeable speckles, near flat-topped intensity distribution, and also no visible hot spots or interference patterns. The invention can be used in many applications, such as microscopes, material processing, fluorescence, lighting devices, holography, fiber coupling, and the like, which require the spectral characteristics (narrowband, monochromaticity) of the laser, but at the same time require a uniform distribution of the intensity.

The present invention relates to an optical fiber photometric measurement technique. An optical brain signal measurement device (100) according to one embodiment may comprise a light source unit (110), an excitation filter unit (120), a first split-splice unit (130), a second split-splice unit (140), an emission filter unit (150), and a measurement unit (160). The optical brain signal measurement device 100 transmits an optical signal to a brain signal measurement object through a directional optical fiber, divides or splices the signal through a dividing and splicing part, and recognizes a wavelength range corresponding to each of the multiple signals through an optical splitter, thereby eliminating a dichroic filter. Therefore, multiple brain signals (multiple light sources) can be obtained by using the light source directivity of the optical fiber and the optical splitter.

A lidar includes a two-part objective for imaging a target and directing a probe beam to the target. A portion of a tracking beam that degrades the target image is attenuated with a dichroic filter that blocks a central portion of the tracking beam. A local oscillation beam can be generated with a hybrid lens that directs the probe beam through a polarizing beamsplitter to be focused at or on a waveplate so that a portion is reflected from the waveplate as the local oscillation beam. An imaging system that is confocal with the probe beam is coupled to provide a target measurement or to establish a focal point of the probe beam.

The invention discloses a microwave quasi-optical dichroic filter based on a frequency selective surface. The microwave quasi-optical dichroic filter comprises a first metal layer, a first dielectric substrate, a second metal layer, a bonding layer, a second dielectric substrate and a third metal layer which are sequentially arranged in the thickness direction. Through the material design of the symmetrical multi-layer structure and the metal and medium (the medium substrate and the bonding layer), compared with a pure metal material and a 3D printing material, loss optimization is achieved, and ohmic loss caused by the skin effect is effectively restrained through thinning of the metal layer; the dielectric material with low dielectric constant and low loss angle tangent is selected to control the increase of dielectric loss, and the influence of a large incident angle on the transmission performance is remarkably reduced.

The invention provides a continuous zoom lens, a continuous zoom microscope and a wide-field imaging system, the continuous zoom lens comprises four lens groups, the second lens group and the third lens group can move along an optical axis so as to adjust the air space between the second lens group and the front lens group and the air space between the third lens group and the rear lens group, and therefore continuous zoom is achieved. The continuous zoom lens is combined with the zoom lens, the double-color piece and the filter to form the continuous zoom microscope for optical imaging, so that integrated design and processing are facilitated, debugging is convenient and fast, the procedure of optical axis adjustment is omitted, the probability of optical axis deviation caused by optical axis adjustment is reduced, and the imaging quality is improved; the diamond NV color center fluorescence imaging material is designed according to the working wave band of 630-750 nm, and when the diamond NV color center fluorescence imaging material is applied to diamond NV color center fluorescence imaging, the diamond NV color center fluorescence imaging material can be well matched with the NV color center fluorescence wave band, and aberration is reduced. On the basis of a microscope, the wide-field imaging system based on the diamond NV color center is provided, continuous zoom adjustment can be achieved, and the imaging quality can be improved.

The invention relates to an optical analysis system (10), characterised in that it comprises: - at least one first light source (20); - at least one dichroic filter (40); - at least one lens (50); - at least one optical fibre (60); - at least one spectrometer connected to the optical fibre (60), wherein the first light source (20) is configured to emit a first light flux passing through at least the lens (50) in order to expose a target area on a surface of a material (80), and wherein the optical fibre (60) collects at least one second flux resulting from the reflection of the first flux off the target area or from the fluorescence of the target area following exposure by the first flux and conveys it to the spectrometer, the system (10) further comprising at least one camera (30) configured to capture an image of the test area (80).

A dual-substrate dichroic beam combiner includes two substrates, and a dichroic thin-film filter coated at a nominally planar interface between the substrates. The filter is configured to combine, into a combined laser beam, two input laser beams that are incident on the filter of the combiner from opposite respective sides thereof. One input beam is transmitted by the combiner, while the other input beam is reflected. The substrates are configured to, when heated by absorption of the input laser beams in the filter, form a lens for each of the input laser beams. The lens is either (a) a negative lens for each of the input laser beams or (b) a positive lens for each of the input laser beams. The combiner thereby reduces or eliminates focusing discrepancies between the two input beams, in the combined beam, as compared to a conventional single-substrate dichroic beam combiner.

The existing solar power generation panel installed on the roof of a smart farm has problems that an amount of light transmitted into the greenhouse is significantly reduced and the transmitted light is also not uniform, and thus an area where the solar power generation panels are installed is shaded and a shadow occurs. For these reasons, an installation distribution rate of solar power generation panels installed on the roofs of smart farms is very low. A solar power generation system for smart farms includes a three-dimensional (3D) optical filter window with a function of selectively transmitting light of wavelengths applicable to smart farms, and a solar power generation module provided to protrude above an optical filter of the optical filter window to increase solar power use efficiency. Since shading occurs when a solar power generation panel is used in a smart farm to affect cultivation, there is a problem in that the solar power generation panel cannot be used on the roof of a smart farm. However, according to the above-described configuration of the present invention, the optical filter window equipped with a dichroic light filter is used to solve this problem so that there is an effect of operating a smart farm more economically.

The invention relates to an optical transmitter and receiver module (100), which includes: - an optical fibre (10), - a substrate (50) for positioning the optical fibre, - a light source (20), - a photodetector (30), and - an optical element (40). A first side face (55) of the substrate (50) and a first end face (14) of the optical fibre together form a common face. The optical element (40) includes an input face (41) on which a dichroic filter (45) is deposited, the input face being arranged to face the common face. The common face has two successive planar portions: - a first planar portion (91) defining a plane having an angle β relative to a plane (P) perpendicular to an optical axis of the optical fibre, and - a second planar portion (92) defining a plane having an angle α with respect to the optical axis.