899 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 optical combiner is employed to reflect a first part and a second part of a synthetic light field towards a first eye and a second eye of user(s), respectively, whilst optically combining the first part and the second part with a real-world light field. Portion(s) of the optical combiner from which a part of the synthetic light field is reflecting towards a given eye of a given user is determined, based on a relative location of the given eye with respect to the optical combiner. Portion(s) of active optical device(s) that corresponds to the portion(s) of the optical combiner are activated, to decrease transmittance of the real-world light field passing through the portion(s) of the optical combiner towards the given eye, and / or to increase reflectance of the synthetic light field being reflected by the portion(s) of the optical combiner towards the given eye.

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 a display panel and a display device, relates to the technical field of display, and can reduce the problem of large-viewing-angle light leakage of the display panel and improve the peep-proof effect of the display panel. The display panel comprises a driving substrate, and the driving substrate comprises a substrate layer and a driving layer; the light-emitting device layer is arranged on the side, away from the substrate layer, of the driving layer; the at least two shading structures are arranged on the side, away from the substrate layer, of the light emitting device layer, and an isolation layer is arranged between the at least two shading structures; the light-emitting device layer comprises a pixel defining layer, a light-emitting layer and a reflection structure, the pixel defining layer comprises a plurality of pixel openings, the light-emitting layer is arranged on the pixel openings, and at least part of the reflection structure is arranged on the inner walls of the pixel openings; the shading structure is provided with a plurality of hollows, and orthographic projections of the hollows on the substrate layer cover orthographic projections of the pixel openings on the substrate layer.

The embodiment of the invention provides an optical module and near-to-eye display equipment. The optical module is used for XR optical equipment and comprises a cemented prism, a lens and a curved surface reflection element, and the lens is located between the cemented prism and the curved surface reflection element. The glued prism comprises a first prism and a second prism which are glued with each other, and the second prism and the lens are adjacent and are arranged at an interval; the curved surface reflection element comprises a sixth surface, the sixth surface is adjacent to the lens, and the sixth surface is a curved surface and is a partial reflection surface; the optical module further comprises a polarization reflection element and a phase delayer, the polarization reflection element is located between the first prism and the second prism, and the phase delayer is located between the second prism and the lens. The optical module meets the condition that EFL15 / EFL6 is larger than or equal to 0.2 and smaller than or equal to 4.1, EFL15 is the total effective focal length of the cemented prism and the lens, and EFL6 is the effective focal length of the curved surface reflection element.

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.

An electronic device is provided. The electronic device includes a ring-shaped housing having an inner surface into which a finger of a user is inserted, a light-emitting unit configured to emit a light to the inner surface of the housing through a first region of the inner surface of the housing within the housing, a light-receiving unit configured to receive first light, which is a portion of the light reflected from an inside of the finger of the user, through a second region of the inner surface of the housing within the housing, and a coating layer, disposed between the first region and the second region, configured to reflect second light, which is distinct from the first light and is remaining portion of the light, to the finger of the user to transmit the second light to the light-receiving unit.

An object detection system and method for a vehicle headlight include a visible light emitter and an object sensing subsystem having an infrared line emitter for emitting infrared detection radiation and an infrared line detector. An optical subsystem receives the visible light and directs it into an external region to illuminate the external region and receives the infrared detection radiation and directs it onto an object in the external region. The optical subsystem includes a partially reflective element optically between the infrared line emitter and the external region and optically between the object sensing subsystem and the external region. The partially reflective element is configured to pass one of the infrared detection radiation and the visible light and to reflect the other of the infrared detection radiation and the visible light, such that the object sensing subsystem senses the object in a line-scan-gated mode.

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.

An optical lens assembly includes, in order from a visual side to an image source side: an optical group including a partial-reflective-partial-transmissive element; and in order from the visual side to the image source side: an absorptive polarizer, a reflective polarizer, a phase retarder, a first lens, a second lens, and a third lens; wherein the partial-reflective-partial-transmissive element is disposed between the first lens and the third lens; at least one of the first lens and the second lens has a positive refractive power; when the focus of the optical lens assembly changes from a near point to a far point, the optical group moves from the image source side to the visual side. The optical lens assembly may become lightweight and have good image quality when satisfying a specific condition.

The utility model 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%.

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 disclosure relates to radio engineering, and more specifically, to a wide scan angle antenna array. Technical result consists in expanding the scanning range, increasing the efficiency of the antenna array and reducing losses. Antenna array is provided. The antenna array includes a plurality of antenna array elements, and a metasurface disposed above the antenna array, wherein the metasurface is a dielectric layer having, on a first side thereof, conductive elements configured to reflect part of radiation of the antenna array; the distance between the antenna array and the metasurface is based on an integer number of half wavelengths, an operating wavelength of the antenna array in a medium in the space between the antenna array and the metasurface, and a predetermined scanning angle of the antenna array.

A film thickness measurement device and a detection device, the film thickness measurement device comprising: a light source module configured to provide an illumination beam in a preset wavelength range; the reflection assembly is configured to partially cut into the illumination light beam and partially reflect the illumination light beam; the transmission assembly is configured to receive the illumination light beam reflected by the reflection assembly and output the illumination light beam to a to-be-tested piece; receiving an information light beam formed by reflecting the illumination light beam by the to-be-detected piece, and outputting the information light beam to a first light beam detection module; and the first light beam detection module is configured to receive the information light beam output by the transmission assembly, at least detect the light intensity of the information light beam and output a corresponding first detection result. The device provided by the utility model does not need a beam splitter, the information light beam is not reflected or diffracted, the signal intensity of the information light beam received by the first light beam detection module is high, the measurement time is reduced, and the detection accuracy is improved.

A head-up display 700 has an eye-box and includes picture generating and viewer tracking units. The picture generating unit includes a display device and a waveguide 704. The display device outputs a

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 invention discloses a single-frequency pulse laser source multi-dimensional imaging system and method, and belongs to the technical field of laser radars. The imaging system comprises a single-frequency pulse laser source module, an optical imaging module, a frequency shift and phase modulation module, a time sequence control module and a data processing module, the single-frequency pulse laser source module emits a detection light beam, a first local reference light beam and a second local reference light beam, and the detection light beam irradiates a target to generate a reflection light beam; the time sequence control module controls the three light beams to perform synchronous frequency shift, so that the first local reference light and the reflected light beam are coherent in the optical imaging module to form a holographic image, and the second local reference light beam and the partially reflected light beam generate a beat frequency signal in the frequency shift phase modulation module; the data processing module analyzes the beat frequency signal so as to adjust the initial phase and frequency of outgoing of the detection light beam, and dynamic coherent imaging of the reflected light beam and the first local reference light in the optical imaging module is ensured; and real-time information of the holographic image is analyzed, and a high-quality three-dimensional image is reconstructed.

The utility model discloses an optical system. The optical system sequentially comprises a first lens, a reflective polarizing element, a first quarter-wave plate, a second lens, a third lens, a partial reflection element, a second quarter-wave plate, a polarizing film and a fourth lens from a first side to a second side along an optical axis, the first lens has positive focal power, and the first side surface of the first lens is a convex surface; the second lens has negative focal power, the first side surface of the second lens is a plane, and the second side surface is a concave surface; the second side surface of the third lens is a convex surface; the first side surface of the fourth lens is a plane; the effective focal length f1 of the first lens and the effective focal length f2 of the second lens meet the following formula:-0.7 lt; f1 / f2lt; -0.15, < = 0.15; the combined focal length fz2 of the second quarter-wave plate, the polaroid and the fourth lens and the curvature radius R8 of the second side face of the fourth lens meet the condition that fz2 / R8 is larger than or equal to-2.0 and smaller than or equal to-1.5.

The invention discloses an optical module, a manufacturing method thereof and a near-to-eye display device. The optical module is provided with a light-in side and a light-out side, and comprises a first lens, a partial reflector, a phase retarder, a second lens, a reflective polarizer and a light-transmitting structure. The partial reflector is arranged on the first lens close to the light incident side, the phase retarder is arranged on the first lens far away from the partial reflector side, the second lens is arranged on the phase retarder far away from the first lens side, the reflective polarizer is arranged on the second lens close to the phase retarder side, and the light transmitting structure is arranged on the reflective polarizer close to the phase retarder side. The reflective polarizer has a reflection axis direction and a transmission axis direction which are perpendicular to each other, the light-transmitting structure has a lowest refraction direction, the refractive index of the light-transmitting structure on linearly polarized light parallel to the lowest refraction direction in the lowest refraction direction is lowest, and the included angle between the lowest refraction direction and the reflection axis direction is larger than or equal to 70 degrees and smaller than or equal to 90 degrees. Therefore, the reflective polarizer has a larger reflective polarization ratio.

The invention provides a low-noise speckle interference system and method based on a spatial light modulator, and relates to the technical field of speckle interference, and the system comprises a laser, a first beam splitter prism and an imaging element. A laser beam emitted by the laser is divided into transmission light and reflected light by the beam splitter prism I; after being reflected by the third beam splitter prism, part of the transmission light is irradiated on an imaging element as reference light; part of the reflected light sequentially passes through a linear polaroid and a half-wave plate, is modulated by a spatial light modulator assembly, irradiates a fourth beam splitter prism, and is reflected to the surface of a measured object to generate diffuse reflection, so that slow-reflection light is obtained; according to the speckle interference system, object light is modulated by using a spatial light modulator assembly, so that emergent light modulated by the spatial light modulator assembly irradiates a measured object at various illumination angles, mutually independent speckle fields are formed on a target surface of an imaging element, speckle decorrelation noise can be effectively inhibited after multiple times of measurement and superposition, and the measurement accuracy is improved. And the accuracy of subsequent measurement results is improved.

The invention discloses a visual system, the visual system comprises a lens barrel, and a first lens, a reflective polarization element, a quarter-wave plate, a second lens, a third lens and a partial reflection element which are assembled in the lens barrel, the first lens has positive focal power, and the first side surface is a convex surface; the second lens has focal power, and the first side surface is a plane; the third lens has focal power, and the second side surface is a convex surface; first and second spacing elements are respectively arranged between the first and second lenses and between the second and third lenses; the visual system meets the conditional expression of 9.15 lt; d2s / CT2lt; 12.6, 0.13 < = d1s-d1m / T12 < = 1.96 and 3.3 lt; f / (CP1 + EP12) lt; and 7.9.

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 discloses a backlight module for a double-sided screen and a display terminal. The backlight module comprises a reflecting plate, a light guide layer arranged in the reflecting plate and a light source arranged in the reflecting plate and located on one side of the light guide layer. The flat plate part is attached to the light guide layer, the bending part is bent to be in a C shape and surrounds the outer side of the light source, the coarse grain part is connected between the flat plate part and the bending part in a transition mode, and the end, close to the light source, of the light guide layer is tightly attached to the coarse grain part. By arranging the reflecting plate of the three-section structure, the flat plate part can normally achieve the reflecting function, the bent part can assist a light source to be output to the light guide layer in a concentrated mode, and by arranging the coarse grain part, on one hand, under the condition that the light guide layer is attached, the distance between one end of the light guide layer and the light source is limited, and the light source cannot be affected under the condition that the light guide layer is heated and expanded; and on the other hand, the reflecting effect of the part of reflecting plate can be weakened, so that the phenomenon of bright edges on the display screen is avoided.

The utility model discloses a laser methane gas detection device, belongs to the technical field of gas detection, and solves the problem that a laser methane sensor is easily influenced by interference factors such as water mist and greasy dirt in air to interfere gas detection. Comprising a circuit board and a laser reflecting part, the laser reflecting part is installed on the surface of the circuit board, and a laser transmitter and a laser receiver are further installed on the surface of the circuit board; a grating partition plate is arranged in the laser reflecting part, and the laser transmitter and the laser receiver are distributed on the two sides of the grating partition plate; a cavity is formed in the laser reflecting piece, and laser emitted by the laser emitter is reflected to the laser receiver through the inner wall of the laser reflecting piece and the grating partition plate; according to the utility model, greasy dirt and water vapor existing in gas to be detected are filtered through the filter screen, scattered light emitted by laser beams and part of reflected light are shielded by utilizing the grating partition plate in the laser reflecting piece, and the measurement precision and accuracy of gas detection are improved.

The embodiment of the invention provides an optical module and near-to-eye display equipment. The optical module is used for XR optical equipment and comprises a cemented prism and a lens which are adjacent and arranged at an interval. The cemented prism comprises a first prism, a polarization reflection element and a second prism which are arranged in sequence, the lens is located on the side, away from the first prism, of the second prism, and a phase retarder is arranged between the lens and the second prism; the lens comprises a fifth surface and a sixth surface, the sixth surface deviates from the cemented prism, and the sixth surface is a partial reflection surface; the cemented prism and the lens comprise at least two curved surfaces; the optical module meets the condition that EFL24 / EFL56 is more than or equal to 7.4 and less than or equal to 9.2; eFL24 is the effective focal length of the cemented prism, and EFL56 is the effective focal length of light which enters from the fifth surface, is reflected by the sixth surface and then exits from the fifth surface.

To provide a laser oscillator which enables fast and highly accurate monitoring of the output of first laser beam for use in laser beam machining.SOLUTION: A laser oscillator 80 emitting laser beam LB0 comprise a plurality of laser modules 10, a focusing optical unit 40, and an output monitoring mechanism 30A. The output monitoring mechanism 30A includes a partial reflection mirror 24, a mixing rod 35, and a photodetector 36. The partial reflection mirror 24 splits the laser beam LB0 into a first laser beam LB1 and a second laser beam LB2. The mixing rod 35 has an incident end face 35a and an exit end face 35b, and guides the second laser beam LB2 incident from the incident end face 35a to the exit end face 35b while totally reflecting the second laser beam LB2 inside. The photodetector 36 outputs an output signal on the basis of the amount of the second laser beam LB2 emitted from the exit end face 35b.SELECTED DRAWING: Figure 2

The invention provides a self-reference speckle interference measuring system, and relates to an optical measuring system, the self-reference speckle interference measuring system comprises a laser beam generating device, an imaging lens, a first lens, a second lens, a first beam splitter prism, a second beam splitter prism, a first reflector, a second reflector, a diaphragm, a small hole and an imaging device, the laser beam generating device generates a laser beam and irradiates a measured object to form reflected light; part of the reflected light sequentially penetrates through the imaging lens and the first lens, then irradiates the first beam splitter prism and is divided into reflected light and penetrating light by the first beam splitter prism. Part of the reflected light is reflected by the reflector I, passes through the diaphragm, is reflected by the beam splitter prism II, passes through the lens II and is irradiated on an imaging surface of the imaging device; part of the penetrating light penetrates through the small hole, is reflected by the second reflector, then sequentially penetrates through the second beam splitter prism and the second lens and irradiates the imaging face of the imaging device. The technical problem that the air disturbance on the object light propagation path interferes the measurement result can be effectively solved.

A projector (10) for an augmented reality or mixed reality headset is disclosed, comprising: an emissive display (20) defining an optical axis (9), configured to provide first supplied light (40); an exit pupil (80) configured to couple the first supplied light into a waveguide for an augmented reality or mixed reality headset, the exit pupil comprising a first region (82); an optical arrangement (60) configured to couple the first supplied light from the emissive display towards the exit pupil; and an absorptive structure (70) at the emissive display arranged to absorb visible light reflected towards the emissive display from the exit pupil; wherein the emissive display is configured to provide the first supplied light to the optical arrangement off-centre with respect to the optical axis so that a first partial reflection (50) of the supplied light is coupled towards and absorbed by the absorptive structure.

The utility model discloses an object detection sensor and a detection method. Wherein the detection sensor comprises a light emitting part, a light guide channel, a light receiving part and a control part, and the light emitting part is used for emitting a light beam to a to-be-detected object platform; the light receiving part is used for receiving partially reflected light beams of the to-be-measured object platform; the light guide channel is used for guiding part of reflected light beams of the to-be-measured object platform to the light receiving part; the control part is connected with the light emitting part and the light receiving part and used for controlling photoelectric signal conversion of the light emitting part and the light receiving part. According to the utility model, the requirement on a to-be-detected object is greatly reduced, the detection application range is greatly increased, and the detection sensitivity and accuracy are high.