45 results about "Dichroic filter" patented technology

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.

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.

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.

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 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.

Microscopic Raman spectroscopy device that detects and analyzes Raman scattering light emitted from sample irradiated with excitation light includes: laser light source that emits excitation light; spectrometer for measuring spectrum of the Raman scattering light; wavelength discriminator such as a dichroic filter that reflects the excitation light emitted from the laser light source toward the sample and transmits Raman scattering light emitted from the sample toward the spectrometer; condenser lens arranged between wavelength discriminator and the spectrometer for condensing the Raman scattering light passing through the wavelength discriminator; aperture arranged between the condenser lens and the spectrometer for limiting Raman scattering light incident on the spectrometer; adjusting means for adjusting to match a position of spot image of Raman scattering light condensed by condensing lens with a position of the aperture so that light amount of Raman scattering light passing through the aperture is maximized.

The invention provides a light generating system (1000) comprising a first light generating device (10), a first quarter wave plate (721), a polarization based beam director (1510), a dichroic filter (750), a luminescent material element (2000), and a light exit (1090), wherein: - the first light generating device (10) is configured to generate first device light (11); the luminescent material element (2000) is configured to convert part of the first device light (11) received by the luminescent material element (2000) into luminescent material light (201); - the light generating system (1000) is configured such that at least part of the reflected first device light (11), in an optical path (i) propagates away from the luminescent material element (2000) and (ii) also returns to the luminescent material element (2000); wherein this optical path is (a) at least twice via the polarization based beam director (1510), and (b) twice via the first quarter wave plate (721), whereby the luminescent material element (2000) converts at least part of the reflected first device light (11), received by the luminescent material element (2000) via this optical path, into further luminescent material light (201'); and - the light generating system (1000) is configured to generate system light (1001) comprising at least part of the luminescent material light (201) and at least part of the further luminescent material light (201').

A lamp assembly according to the present invention is used as a light source of a head lamp or a beacon, and comprises: a dichroic filter member that has a filter surface for transmitting light irradiated from the rear and reflecting light irradiated from both sides toward the front; a first light source irradiation unit including a green first light source provided at a side corresponding to the front side of the dichroic filter member, and a first aspherical lens provided between the dichroic filter member and the first light source in order to concentrate light irradiated from the first light source; a second light source irradiation unit which is provided on both sides of the dichroic filter member so as to match an optical axis with the first light source irradiation unit, and which includes a red second light source and a second aspherical lens provided between the second light source and the dichroic filter member in order to concentrate light irradiated from the second light source; and a third light source irradiation unit including a blue third light source and a second aspherical lens provided between the third light source and the dichroic filter member in order to concentrate light irradiated from the third light source.

An automated polymerase chain reaction (PCR) analyzer (110) for analyzing at least one sample (112) and a method of automated PCR analysis is disclosed. The automated PCR analyzer (110) comprises: - at least one controller (114); - at least one thermocycling apparatus (116) configured for subjecting the sample (112) to at least one temperature modulation controlled by the controller (114); and - at least one photometer (118) configured for detecting at least one optically detectable property of the sample (112), the photometer (118) comprising at least one excitation light source (120) configured for illuminating the sample (112) with excitation light (122), the photometer (118) further comprising at least one photodetector unit (124) configured for detecting light (123) emitted from the sample (112), the photometer (118) further comprising a movable filter cell (126) controllable by the controller (114), the movable filter cell (126) comprising a plurality of filter cell units (128), each filter cell unit (128) comprising at least one optical excitation filter element (130), at least one dichroic filter (132), at least one optical detection filter element (134) and at least one the aperture stop (174), wherein the photometer (118) comprises a working position for the filter cell units (128), wherein the movable filter cell (126) is configured for selectively positioning a selected filter cell unit (128) selected from the plurality of filter cell units (128) in the working position, wherein, in the working position, the selected filter cell unit (128) is positioned such that the excitation light (122) interacts with the optical excitation filter element (130), the dichroic filter (132) and the aperture stop (174) of the selected filter cell unit (128) and that the light (123) emitted from the sample (112) interacts with the dichroic filter (132), the aperture stop (174) and the optical detection filter element (134) of the selected filter cell unit (128).

The utility model relates to a laser light source projection system with high luminous efficiency, which comprises a first laser capable of emitting blue light beams, a fluorescent wheel is arranged on an emergent light path of the first laser, the fluorescent wheel is provided with a fluorescent area and a transmission area, and the fluorescent area can be excited by the blue light beams to generate red, yellow and green light beams. A first dichroic sheet is arranged on a projection light path between the first laser and the fluorescent wheel, an integral rod is arranged on a reflection light path of the first dichroic sheet, the projection system further comprises a second laser capable of emitting a red light beam, and a reflection assembly is arranged on a transmission light path of the fluorescent wheel. A second dichroic sheet is arranged on an emergent light path of the reflection assembly, and the first dichroic sheet and the second dichroic sheet are both arranged on an emergent light path of the second laser. The device is characterized in that the second laser capable of emitting red light beams is arranged, so that the conversion efficiency of light energy is improved while the angle of intercepting red light in the fluorescent wheel is reduced.

To provide a stimulated emission depletion microscopy system that shortens scanning time while maintaining sufficient spatial resolution.SOLUTION: A stimulated emission depletion microscopy system controls a wavefront of stimulated emission depletion light into a circular shape using a wavefront control optical system 5 and controls a wavefront of excitation light into a flattened shape using a wavefront control optical system 6. By scanning, in a y-direction, the stimulated emission depletion light whose wavefront is controlled by a deflector 7, a stimulated emission depletion light group STLG arranged in parallel along the y-direction is generated. The stimulated emission depletion light group STLG and the excitation light EXLF, combined by a dichroic filter 8, are scanned in a xy-direction by a two-dimensional deflector 9, enabling simultaneous excitation and de-excitation of a plurality of regions within a single frame time of a detector and allowing fluorescence signals to be detected. Before the stimulated emission depletion light and excitation light are combined by the dichroic filter 8, the stimulated emission depletion light is scanned in the y-direction by the deflector 7 at a speed higher than the non-resonant frequency of the two-dimensional deflector 9.SELECTED DRAWING: Figure 1

In this stimulated emission depletion microscope system, a wavefront control optical system (5) controls stimulated emission depletion light such that the wavefront of the stimulated emission depletion light has an annular shape, a wavefront control optical system (6) controls excitation light such that the wavefront of the excitation light becomes flat, a deflector (7) scans the wavefront-controlled stimulated emission depletion light in the y direction to generate a stimulated emission depletion light group (STLG) in parallel in the y direction, and a two-dimensional deflector (9) scans, in the xy direction, the stimulated emission depletion light group (STLG) and the excitation light (EXLF) that have been combined by a dichroic filter (8), so that a detector simultaneously excites and de-excites a plurality of regions within one frame time of the detector and detects a fluorescence signal. Before the stimulated emission depletion light and the excitation light are combined by the dichroic filter (8), the deflector (7) scans the stimulated emission depletion light in the y direction, so that scanning is performed at a higher frequency than the non-resonance frequency that the two-dimensional deflector (9) has.