506 results about "Partial reflection" patented technology

A sensor and method for page-based optical data storage. The sensor includes a partially-reflective mirror, a reflective mirror disposed substantially collinear with and spaced apart from the partially-reflective mirror, and an active layer disposed substantially collinear with and between the partially-reflective mirror and the reflective mirror. The partially-reflective mirror has a first and second side and transmits a portion of light incident on the first side. The reflective mirror reflects light incident on the reflective mirror toward the partially-reflective mirror. The active layer absorbs at least a portion of the light oscillating at the resonant frequency.

A laser distance ranging method includes splitting two combs of dual comb radiation into a signal radiation portion and a local oscillator radiation portion. The signal radiation portions are, after separation, combined into a combined signal radiation and directed onto an object, the distance to which is to be measured. The signal thrown back from the object is split into a first and second signal portions. The first signal portion is superimposed with the second local oscillator radiation portion to generate a first measurement signal, and the second signal portion is superimposed with the first local oscillator radiation portion to generate a second measurement signal. The distance to the object is determined from the first and second measurement signals, and from reference signals obtained by the partial reflection, wherein the Vernier effect can be used to extend ambiguity by comparison of the first and second measurement signals.

An apparatus includes a waveguide and one or more partially reflective surfaces embedded inside the waveguide, wherein each of the one or more partially reflective surfaces includes a multi-layer coating structure, wherein a first portion of the multi-layer coating structure induces an overall phase shift of light propagating through the first portion of the multi-layer coating structure and wherein a second portion of the multi-layer coating structure is selected to decrease the overall phase shift.

The invention discloses an optical waveguide and a preparation method thereof, relates to the technical field of optics, and is used for solving the problems of high processing difficulty, low yield and high cost of the existing array optical waveguide. The optical waveguide comprises a turning waveguide which is provided with a light incident surface, a first surface, a second surface and a plurality of first light splitting surfaces, the first surface and the second surface are arranged in parallel, the first light splitting surfaces are arranged in parallel, the included angle between the first light splitting surfaces and the first surface is smaller than 90 degrees, and the first light splitting surfaces enable light entering the turning waveguide from the light incident surface to be partially reflected; the reflected light is transmitted to the coupling-out waveguide; the coupling-out waveguide and the turning waveguide are spliced, so that light entering the coupling-out waveguide from the turning waveguide is emitted out of the coupling-out waveguide. The first beam splitting surface of the turning waveguide is not perpendicular to the first surface of the turning waveguide, compared with an existing array optical waveguide, the situation that the perpendicularity precision of the beam splitting surface and the surface of the optical waveguide needs to be strictly controlled in the machining process can be avoided, and therefore the machining difficulty can be lowered, the yield can be improved, and cost can be reduced.

Base station antennas include a reflector, a first linear array of radiating elements extending forwardly from the reflector, the radiating elements in the first linear array configured to operate in a first frequency band, and a second linear array of radiating elements extending forwardly from the reflector, the radiating elements in the second linear array configured to operate in the first frequency band. These antennas further include an isolation wall that is positioned in between the first linear array of radiating elements and the second linear array of radiating elements. This isolation wall comprises at least one partially reflective surface that is configured to reflect, on average as a function of frequency, between 20% and 80% of incident radiation in the first frequency band.

The utility model discloses an optical imaging system. The optical imaging system comprises a lens cone, an imaging group and a second spacing element, wherein the imaging group and the second spacing element are arranged in the lens cone. The imaging group sequentially comprises a linear polarization film, a reflective polarization element, a quarter-wave plate, a first lens, a second lens, a third lens, a fourth lens and a partial reflection layer from the first side to the second side along the optical axis; wherein the first lens and the second lens are glued, and the third lens and the fourth lens are glued. The second spacer element is disposed on the second side of the second lens and is in contact with the second side of the second lens. Wherein the outer diameter D0m of the second side end face of the lens barrel and the outer diameter D2m of the second side face of the second spacing element meet the condition that D0m-D2m is larger than or equal to 4.51 mm and smaller than or equal to 5.8 mm; the inner diameter d2m of the second side surface of the second spacing element, the inner diameter d2s of the first side surface of the second spacing element, and the axial distance T23 from the second side surface of the second lens to the first side surface of the third lens satisfy the following formula: (d2m-d2s) / T23 is greater than or equal to 0.97 and less than or equal to 2.79.

The invention discloses an array optical waveguide and a preparation method thereof, relates to the technical field of optics, and is used for solving the problems of high processing difficulty, low yield and high cost of the existing array optical waveguide. The turning waveguide is provided with a first surface and a second surface, a first area of the turning waveguide is provided with at least two first light splitting surfaces which are located between the first surface and the second surface and are parallel to each other, and the included angle between each first light splitting surface and the first surface is smaller than 90 degrees; the light enters the first light splitting surface to be partially reflected, and the reflected light is propagated to a second area of the coupling-out waveguide; the second area of the coupling-out waveguide enables the light to be emitted out of the array optical waveguide. Compared with an existing array optical waveguide, the array optical waveguide has the advantages that strict control of the perpendicularity precision of the light splitting surface and the surface of the optical waveguide during processing can be avoided, the processing difficulty can be reduced, the yield can be improved, and the cost can be reduced.

The disclosure relates to an optical system for an augmented reality apparatus, comprising: an image projection source; and a polarizing beam splitter. The polarizing beam splitter is arranged such that light emitted from the image projection source is able to be non-perpendicularly incident on the beam splitting side and be at least partially reflected. The polarizing beam splitter is configured such that a polarized light component passes through the polarizing beam splitter and is transmitted through the transmission side thereof, and a polarized light component is reflected from the beam splitting side. The optical system also comprises a polarizer disposed between the image projection source and the polarizing beam splitter, and the polarizer is configured to allow polarized light, whose polarization is in the second direction, to be transmitted therethrough and polarized light, whose polarization is in the first direction to be absorbed.

The invention relates to a multi-path high-stability narrow-linewidth external cavity semiconductor laser and application thereof, and belongs to the technical field of lasers. The laser comprises two groups of external cavity light paths, Z-block beam combiners, partial reflectors and isolators, the two groups of external cavity light paths are arranged side by side, and the Z-block beam combiners, the partial reflectors and the isolators are sequentially arranged on the light emitting sides of the two groups of external cavity light paths; the external cavity optical path comprises a gain chip, a collimating lens, a polarization analyzer A, a polarization beam splitter, an F-P etalon and a narrow-band-pass filter which are sequentially arranged along the optical path. The polarization analyzer and the polarization beam splitter are arranged in the external cavity light path, main polarized light is kept to resonate in the external cavity light path, the polarization suppression ratio of the external cavity light path is improved, non-dominant mode noise is suppressed, and the line width is reduced; the mode jump risk is reduced, the device life is prolonged, and the power stability is improved; the beam quality is improved; and the polarization dependent loss in a light path is reduced.

The utility model discloses a visual system, which comprises a lens barrel, and a first lens, a reflective polarizing element, a quarter-wave plate, a second lens, a third lens and a partial reflection element which are assembled in the lens barrel and are sequentially arranged from a first side to a second side along an optical axis, the second lens has positive focal power and a plano-convex surface type, and the second side surface of the third lens is a convex surface; a first spacing element is arranged between the first lens and the second lens, and a second spacing element is arranged between the second lens and the third lens. The curvature radius R1 of the first side face of the first lens and the outer diameter D0s of the end face of the first side of the lens barrel meet the condition that R1 / D0s is larger than or equal to 1.37 and smaller than or equal to 1.80. The outer diameter D1s and the inner diameter d1s of the first side face of the first spacing element and the center thickness CT1 of the first lens meet the condition that (D1s-d1s) / CT1 is larger than or equal to 0.14 and smaller than or equal to 2.04. The axial distance EP01 from the first side end face of the lens barrel to the first side face of the first spacer element, the maximum thickness CP1 of the first spacer element and the axial distance EP12 of the first spacer element and the second spacer element satisfy 0.99 < = (EP01 + CP1) / EP12 < = 2.47.

The utility model discloses a visual system. The visual system comprises a first lens cone and a second lens cone which are sequentially arranged from a first side to a second side along an optical axis, and a first lens group and a second lens group which are respectively supported on the two lens cones, the first lens group sequentially comprises a first lens, a reflective polarizing element and a quarter-wave plate, and the second lens group sequentially comprises a second lens, a partial reflection element and a third lens; the focal power of the first lens and the second lens is positive, the surface types of the first lens and the third lens are convex and concave-convex respectively, and the second side surface of the second lens is a convex surface; the second lens and the third lens are glued; the second lens group can move along the optical axis to be close to or far away from the display on the second side, so that the system is switched between the first state and the second state; the visual system satisfies the following conditional expressions: 0.33 < = (fz / f23) * (La / Lb) < = 1.10 and 0.75 mmlt; (dbs / dam) * [delta] flt; and the thickness is 1.95 mm.

A display device according to one embodiment of the present disclosure includes: a base layer including a display area; a circuit layer including a conductive pattern in a pixel area of the display area; a first insulating film on the circuit layer, the first insulating film being opened in a contact portion on the conductive pattern; a reflective film on the first insulating film and including a first opening that corresponds to the contact portion; a second insulating film on the reflective film and including a second opening overlapping the first opening; and a display layer on the second insulating film, connected to the conductive pattern through the contact portion, and including a first electrode, a second electrode, and a light-emitting element overlapping the reflective film, wherein, in the contact portion, the reflective film has a wider opening than the second insulating film.

To provide an improved system and method for controlling medical procedure processing. [Solution] The surgical laser system comprises a surgical optical fiber optically coupled to a light source, and a photodetector configured to receive a portion of light reflected from a treatment target, and to generate optical data corresponding to the portion of reflected light interacting with the photodetector. The system also comprises a computing device configured to analyze the optical data against a characteristic criterion, and to control the operation of the laser source based on a comparison of the optical data with the characteristic criterion.

A projection system comprising a display device, a hologram engine and a waveguide. The display device is arranged to display a hologram of an image and spatially modulate light in accordance with the hologram to form a holographic wavefront. The hologram engine is arranged to calculate the hologram. The hologram is arranged to angularly distribute light within the holographic wavefront in accordance with spatial position within the image such that continuous angular ranges of the holographic wavefront respectively correspond with continuous regions of the image. The waveguide comprising a pair of parallel reflective surfaces arranged to waveguide the holographic wavefront therebetween. A first surface of the pair of parallel reflective surfaces is partially reflective-transmissive so as to form an output comprising a plurality of emission zones for the holographic wavefront. The hologram engine is arranged to modify the hologram to at least partially compensate for a decrease in intensity of the emission from each successive emission zone of the waveguide caused by the partial reflection-transmissions at the first surface during waveguiding.

The invention discloses a visual system which comprises a lens cone, a lens group and a spacing element group, wherein the lens group and the spacing element group are assembled in the lens cone; the lens group comprises a first lens with positive focal power, a reflective polarization element, a first quarter-wave plate, a second lens with positive focal power, a third lens with negative focal power, a partial reflection element and a second quarter-wave plate which are sequentially arranged from the first side to the second side along the optical axis. The fourth lens has negative focal power; the spacing element group comprises a first spacing element, a second spacing element, a third spacing element and a fourth spacing element; wherein the number of the lenses with focal power in the lens group is four; the effective focal length f1 of the first lens and the effective focal length f of the visual system satisfy 1.5 lt; f1 / flt; 1.9); the combined focal length FG1 of the first lens, the reflective polarizing element and the first quarter-wave plate and the inner diameter d1s of the first side surface of the first spacing element meet the following conditions: 2.35 lt; fG1 / d1slt, FG1 / d1slt; and 2.75%.

A multicolor light mixing module includes a light-dividing unit, a light-homogenizing member, a first laser set including first and second lighting units in a sequential arrangement, a light-mixing unit obliquely opposite to the light-dividing unit for guiding a first color light of the first lighting unit and a second color light of the second lighting unit along first and second light-mixing axes to form first and second laser beams, and a condensing lens. The light-dividing unit is obliquely opposite to the first laser set to allow partial transmission and partial reflection of the first and second color lights, for guiding the first and second color lights along first and second light-dividing axes. The light-homogenizing member is disposed on the first and second light-mixing axes for homogenizing the first and second laser beams. The condensing lens between the light-homogenizing member and the light-mixing unit condenses the first and second laser beams.

A near-eye display (10) includes a lightguide optical element (LOE) (12) with opposed major surfaces (12a, 12b), an image projector (14), a first region (16) having partially reflective surfaces (26, 27), and a second region (18) with an out-coupling arrangement (28). To suppress ghosts from single reflections at a facet or interface (25), an elongated light-deflecting structure (261, 271, 251) is provided on the first major surface (12a) adjacent thereto. The structure is configured so that a reverse-traced unguided ray from an eye-motion box (102) that would otherwise impinge the facet / interface is deflected so it does not impinge. A corrective light-deflecting structure (262, 272, 252) on the second major surface (12b) may counter-deflect rays to reduce impact on the peripheral vision. The light-deflecting structures provide beam steering without optical power and may be implemented as prisms or as diffractive / metasurface or volume-holographic elements, formed as discrete strips or portions of a continuous film.

This application discloses a deformation screening device and method for industrial containers. The deformation screening device includes: a projection unit, arranged along a first optical axis, for projecting a preset structured optical pattern; a beam splitter, tilted at 45° relative to the first optical axis, capable of reflecting part of the light beam incident upon it and transmitting the other part, so that the structured optical pattern incident upon the beam splitter is reflected along a second optical axis perpendicular to the first optical axis to the industrial container under test; an imaging unit, arranged along a third optical axis collinear with but opposite to the second optical axis, for receiving a distortion detection image returned from the surface of the industrial container under test; and a processing unit configured to determine whether the industrial container under test has deformation defects by comparing the distortion detection image and a distortion reference image. Applying this application eliminates the need for a complex and time-consuming 3D reconstruction process to screen for deformation defects in industrial containers, making it suitable for high-speed online inspection scenarios.

The disclosure provides a visual system, sequentially including a first lens assembly and a second lens assembly from a first side to a second side along an optical axis, the first lens assembly includes a first lens with a positive refractive power, a reflective polarizing element, and a quarter-wave plate; the second lens assembly includes a second lens with a positive refractive power, a partially-reflective element, and a third lens, and the second lens and the third lens are cemented to each other; and the second lens assembly is able to move along the optical axis to cause the visual system to switch between a first state and a second state. A combined focal length fz of the first lens assembly and a focal length fm of the system in the first state satisfy 5.69≤fz / fm≤8.09.

The invention relates to the technical field of projection display, in particular to display equipment and a vehicle. According to the invention, by utilizing the characteristic that light rays from backward flowing of sunlight are partially reflected to the image source display surface and partially transmitted to one side of the back surface of the first reflector according to a transmission path determined by the first reflector, the transmitted light rays are received by the light receiving part arranged on one side of the back surface of the first reflector; and the equivalent temperature of the corresponding position of the image source display surface is detected through a temperature sensor on the incident surface of the light receiving part, so that the influence of sunlight of the same source on the surface of the image source is judged. According to the invention, the fineness of temperature monitoring on the surface of the image source can be improved, the temperature of any position on the surface of the image source can be accurately detected, and the capability of positioning extreme temperature generated by backward sunlight is enhanced.

Provided is a vehicle logo that suppresses the occurrence of uneven illumination at the outer periphery of an outer lens in a light-emitting state. A light-emitting vehicle logo (10) is provided with: a light source (14A); a light guide (16) that guides light emitted from the light source (14A); and an outer lens (18) that emits light by transmitting the light emitted from the light guide (16). The light guide (16) is provided with a plurality of reflecting surfaces (16C) that reflect the guided light from the light source (14A) toward each portion of the outer peripheral portion (18A) of the outer lens (18).

The application discloses a tail fiber VCSEL laser assembly packaging structure and method for reducing analog signal noise. The packaging structure is improved. The glass capillary is used to fix the optical fiber. The grinding angle of the end face of the optical fiber is not less than 11 degrees. A layer of anti-reflection film is coated on the grinding end face of the optical fiber and the grinding end face of the glass capillary, so that the reflected light of the grinding end face is reduced. The inner surface of the metal sleeve is roughened. Most of the light energy of the incident light cone emitted by the laser chip enters the optical fiber and the glass capillary through the grinding end face. A small part of the reflected light energy can only be kept in the reflected light cone and reflected to the outside of the coupling lens at a large reflection angle. The rough surface of the inner surface of the metal sleeve diffusely reflects the reflected light, greatly reduces the light signal jitter generated by the reflected light entering the laser chip, and the light signal jitter is less than 0.001. The packaging method is convenient for production. The grinding and coating errors can be greatly reduced during efficient batch production, and the quality control is facilitated.

A virtual image display apparatus or an optical unit includes a display element, a first prism on which the image light is incident, a second prism joined to the first prism to constitute a prism-based light guide member having a parallel plate shape, an inclined mirror portion disposed at a joining portion between the first prism and the second prism and configured to reflect the image light, a lens having positive power and disposed so as to face an outer side surface of the first prism, and a transmissive mirror formed at an external side of the lens, the image light reflected by the inclined mirror portion, wherein the first prism has, at one of the outer side surface and an inner side surface facing the outer side surface in an upper portion, a ghost prevention structure configured to suppress propagation of the image light.

The application discloses a visual optical system, which comprises a first lens group and a second lens group from the side far from the screen to the side close to the screen along the optical axis, the first lens group comprises a first lens, a reflective polarizing element and a quarter-wave plate; the second lens group comprises a second lens and a partial reflection layer; wherein the side far from the screen of the first lens or the side far from the screen of the second lens is a Fresnel surface; the visual optical system further comprises a lens barrel and a first supporting part arranged on the side close to the screen of the first lens, the first supporting part is at least partially in contact with the side close to the screen of the first lens or the side far from the screen of the second lens; the first lens group, the second lens group and the first supporting part are all contained in the lens barrel, wherein the inner diameters of the side far from the screen and the side close to the screen of the first supporting part are both greater than 50 mm, and the inner diameter d1m of the side close to the screen of the first supporting part, the curvature radius R3 of the side far from the screen of the second lens and the curvature radius R4 of the side close to the screen of the second lens satisfy: -19.0 < d1m / (R3+R4) < 9.5.

The application discloses an optical system and an optical device comprising the same. The optical system comprises a first element group and a second element group in sequence from a first side to a second side along an optical axis. The first element group comprises a reflective polarizing element, a first quarter-wave plate, a first lens and a partially reflective element. The second element group comprises a second lens, a second quarter-wave plate, a polarizer and a display. The optical system satisfies 0.5 < fz1 / fz2 < 1.4 and 5.30 <= (CT2+CTQ2+CTL) / AL <= 7.71, wherein fz1 is a combined focal length of the reflective polarizing element, the first quarter-wave plate and the first lens, fz2 is a combined focal length of the second lens, the second quarter-wave plate and the polarizer, CT2 is a central thickness of the second lens along the optical axis, CTQ2 is a central thickness of the second quarter-wave plate along the optical axis, CTL is a central thickness of the polarizer along the optical axis, and AL is a change in a distance between the first element group and the second element group along the optical axis when the optical system is in a first state and in a second state.

The invention relates to a method for spatial tracking and spectral imaging of microparticles (202) in a sample (200).This method comprises the following steps: A) illumination of the sample by an annular illumination cone (124) from a light beam partially reflected by an annular mirror (13) and focused by a peripheral region (142) of a dark-field microscope objective (14), B) recording of a dark-field microscopy image, this being collected by a central region (144) of the objective, C) identification of the points of interest in the image, D) extraction of the coordinates of the points of interest, in order to form a list of points, E) movement of the sample, so as to scan one of the extracted points, F) illumination of the point on the sample using a laser beam transmitted through the annular mirror and focused by the central region of the dark-field microscope objective, G) collection by the central region of the objective of an emitted Raman spectrum. The invention also relates to an associated system. Figure for the abstract: Fig. 1.

To provide a light emitting toy capable of avoiding light emission failure caused by battery exhaustion or the like and the occurrence of cost.SOLUTION: A light emitting toy includes a light guide body that guides light from the outside, and the light guide body includes a light collecting portion that collects the light, a reflecting portion that reflects the light incident on the light collecting portion to change a traveling direction of the light to a predetermined direction, and a light emitting portion that the light reflected by the reflecting portion reaches.SELECTED DRAWING: Figure 3

The utility model is applicable to the technical field of monitoring display equipment, and provides an interactive monitoring display, which comprises a shell, the shell is provided with a cavity used for installing a key assembly and a main control assembly, the shell comprises a face shell, and the face shell is provided with a semi-transparent blind hole; the key assembly is provided with a positioning shell used for positioning a key set, the positioning shell is installed on the face shell, and the positioning shell is provided with a first light hole; and the main control assembly is provided with an indicating lamp for state prompting. According to the utility model, the semi-transparent blind hole is arranged on the surface shell, the axis of the first light hole arranged on the positioning shell coincides with the axis of the semi-transparent blind hole arranged on the surface shell, and light on the indicating lamp firstly penetrates through the semi-transparent blind hole, so that the light partially penetrates through the semi-transparent blind hole and then penetrates through the first light hole after being partially reflected, so that a user feels softer light during use; the problem that the user experience is affected due to the dazzling feeling caused when the indicator light irradiates the human eyes for a long time is solved.

A transmission direction determination apparatus includes: a first lens configured to collimate light propagating from one multi-core fiber of two multi-core fibers to the other multi-core fiber of the two multi-core fibers; a second lens configured to focus the light that has propagated from the first lens; a partially reflective mirror configured to reflect part of the collimated light and including a first surface and a second surface; a first photodetector disposed on a side of the first surface of the partially reflective mirror and configured to measure an intensity of signal light reflected by the partially reflective mirror; and a second photodetector disposed on a side of the second surface of the partially reflective mirror and configured to measure an intensity of signal light reflected by the partially reflective mirror.