81results about How to "Simplify Optical Design" patented technology

An optical line terminal, a passive optical network and a radio frequency signal transmission method in the communication technical field are provided. The passive optical network comprises: an OLT, an ODN and at least one ONU. The OLT comprises: at least one transmitting unit, which provides one dedicated downstream optical carrier and two dedicated upstream optical carriers for ONU; the two dedicated optical carriers for ONU are configured to carry ONU upstream radio frequency signals; a multiplexing/demultiplexing unit; and at least one receiving unit which obtains the upstream signal from the demultiplexed upstream optical signal. The bandwidth of wireless access network is enhanced, and the design of ONU is simple.

A light source comprising an excitation light source (110) for providing excitation light, and an optical wavelength conversion member disposed at a distance from the excitation light source. The optical wavelength conversion member comprises an optical wavelength conversion material (150) for converting the excitation light into stimulated light. The light source also comprises an optical-guiding member that allows the excitation light to be incident on the optical wavelength conversion material, and an optical-collecting member (130A) for collecting stimulated light originating from the optical wavelength conversion material. To separate the paths of the stimulated light and the excitation light, the etendue of the optical-guiding member is less than or equal to ¼ of the etendue of the optical-collecting member. This allows the optical-guiding member to draw in the excitation light while preventing the excessive escape of the stimulated light through the optical-guiding member. The advantages of the light source are that it can separate the paths of the excitation light and the stimulated light, the light path is simple, and the optical members are easy to manufacture.

A multimedia projector (100) includes a single-path frame-sequential color optical system in which light rays emitted by a light source (14) propagate through a color wheel (102) and an optical integrator (16, 120, 122), and are directed toward a transflective polarizing beam splitter (40) that separates them into P-polarized components (76) and S-polarized components (78). The P-polarized components are transmitted toward a reflective LCD (26) in which pixels in a dark state reflect the light rays without a polarization change and return them through the transflective polarizing beam splitter, whereas pixels in a bright state reflect the light rays with a 90° polarization change as S-polarized light rays (112), which are reflected by the transflective polarizing beam splitter toward a projection lens (27).

The present invention relates to a super continuum light source comprising a pump source arranged to emit light having a center wavelength λ_center arranged to provide pump pulse to a generator fibre, where the refractive index profile of the core is arranged to allow modal cleaning of the light is it propagates, such as via stimulated Raman scattering. An example of invention is the application of a relatively high power pump laser utilized to provide an optical super continuum with relatively high spectral density and/or good beam quality even though the pump laser may provide a beam with a high M².

A plenoptic imaging device according to the invention comprises an image multiplier (130) for obtaining a multitude of optical images of an object or scene and a pick-up system (140) for imaging at least some of the multitude of images to a common image sensor (170) during the same exposure of the sensor.

The invention provides a polarization converter with a novel structure and a projection system using the same. The polarization converter consists of seven small prisms which are arranged in an array and glued together; partial combining surfaces of the prisms are plated with polarization beam-splitting film layers or full reflective film layers; and light emergent surfaces of partial prisms are provided with half wave plates; therefore, the polarization converter can be used for converting all incident non-polarized light into S polarized light or P polarized light for emergence, and has good uniformity of emergent polarized light due to a PCS array. Beams emitted by a light source of the projection system can be directly incident into the polarization converter, and are converted into the S polarized light or P polarized light completely, and a micro lens system is not needed to adjust the beams emitted by the light source, so the optical design is simplified and the cost is saved; and the projection system has high light utilization rate and improves the image display quality.

An image projector (8, 68) includes a light source (14) that illuminates a three-path reflective LCD assembly (25, 74) that produces images for projection by a projection lens (27). The light source produces S-polarized light rays that are received by a spectrally selective wave plate (36) that changes a first wavelength range of light to P-polarized light rays (34) and transmits without polarization change second and third wavelength ranges of light. A plate-type transflective polarizing beam splitter (40) transmits the P-polarized first wavelength range light rays and reflects S-polarized second and third wavelength range light rays (34). The P-polarized first wavelength range light rays transmit through a field lens (421) and impinge on a first reflective LCD light valve (261). The S-polarized second and third wavelength range light rays strike a pleochroic filter (48), which divides them into second and third wavelength range light rays (44, 46) that propagate through field lenses (422, 423) and impinge on respective second and third LCD light valves (262, 263). The light rays impinging on dark state pixels on the first LCD light valve are reflected without polarization direction change and return toward the light source along their original paths. However, the light rays impinging on illuminated state pixels on the first LCD light valve are reflected with a 90° change in polarization direction and are reflected toward the projection lens by the transflective polarizing beam splitter. The light rays impinging on illuminated state pixels on the second and third LCD light valves are reflected with a 90° change in polarization direction, are recombined by the pleochroic filter, and transmit through the transflective polarizing beam splitter toward the projection lens.

A polarization conversion apparatus capable of converting natural incident light into linear light with single polarization for emission includes a plurality of prisms arrayed as a whole component, a plurality of half-wave plates arranged at emission surfaces of some of the prisms, and a plurality of faying surfaces defined inside and a plurality of side surfaces defined outside. Some of the faying surfaces include polarization beam splitting films formed thereon to form polarization beam splitting surfaces, and one faying surface and the side surfaces include total reflection films formed thereon to form total reflection surfaces.

The invention discloses a micro-structure multi-functional optical film, comprising a light entry surface and a light exit surface which face each other; the light exit surface is provided with a plurality of micro-convex structures, wherein, the micro-convex structure is a semi-ellipsoid-similar structure which comprises a long shaft, a short shaft, a height, as well as four arc surfaces connecting the long shafts, the short shafts and the height; the four arc surfaces mutually intersect at four arc lines; the four arc lines intersect at the highest point of the micro-convex structure; the four arc surfaces intersect the light exit surface to form a closed semi-ellipsoid; and the long shafts of the micro-convex structures are arranged in a mutually parallel way. The micro-structure multi-functional optical film effectively integrates the effects of optical films of different types and helps to simplify the structure and optical design of backlight module groups so as to facilitate the manufacturing and reduce costs.

This invention is a wide field surveillance optical system with inherent features being, non mechanical, compact, high resolution, a field of view up to two pi steradians solid angle. The optics design uses a single optical system and multiple flat image collection devices.

Multiple fiber plates translate the image off of the curved image surface to a plane for flat image collection devices. The fiber plates also act to translate the image into a larger volume as compared to the curved image surface, allowing required volume for the multiple image collection devices.

This invention uses a single optical system with multiple CCD or CMOS detectors. Advantages over prior art are simple optical designs, rugged optics because it can be manufactured as a single piece, and wider field of view without the sacrifice of resolution.

The invention uses a scanned two dimensional array of single mode laser diodes to generate a large number of beams scanning a large area of liquid photopolymer. The optical design is further simplified by using interleaved scanning generated by tilring a glass plate. Using a wavelength of 405-410nm allows the use of low cost laser diodes and a simplified optical design.

An optical detection apparatus and method thereof is provided, which is applicable for detecting the image signals of a labeled sample. First, a laser module provides excitation light, and the excitation light is continuously reflected by a scan module for providing linear scanning light by changing a reflection angle. The carrier moves the light module in a direction nonparallel to the linear direction so as to provide a two-dimensional testing zone. The labeled sample placed in the testing zone is excited by the linear scanning light and generates emission light to be received by the light receiver. Therefore, the light receiver forms the image signals of the labeled sample corresponding to the emission light.

The invention provides a breast duct endoscope imaging probe. Pulse laser is coupled to enter one end of an excitation optical fiber and focused at the other end through a collimating convergence element, irradiates onto a reflecting element and then is reflected, then the pulse laser is focused under the inner surface of a living body through a capsule, and an ultrasonic signal is generated because of acousto-optical effects; the ultrasonic signal which is reflected back penetrates through the capsule and irradiates onto the reflecting element and then is reflected and focused onto an opticalresonance element, and the resonant frequency of the optical resonance element is changed; probe laser is coupled to enter one end of a receiving optical fiber, and coupled at the other end of the receiving optical fiber to enter the optical resonance element, and the probe laser for changing the resonant frequency is reflected back from the receiving optical fiber, and subjected to three-dimensional imaging through an optical detector and an imaging unit. According to the breast duct endoscope imaging probe, the device is higher in integrating degree and smaller, low-cost, small, optically transparent and high-bandwidth all-optical acoustic-optical signal collection is achieved, and an existing clinical breast duct endoscope technology is greatly improved.

The stimulated polariton scattering optical amplifier includes a first control optics assembly, a driver element, a second control optics assembly, a polariton active medium and egressing optics. The first control optics assembly receives an incoming laser beam and adjusts that incoming laser beam in accordance with first desired wavelength, polarization and beam propagation parameters. A driver element produces a driver laser beam. A second control optics assembly receives the driver laser beam and adjusts that driver laser beam in accordance with second desired wavelength, polarization and beam propagation parameters. A polariton active medium receives an output from the first control optics assembly and an output from the second control optics assembly. The polariton active medium provides a non-linear optical interaction between the outputs such that the incoming laser beam is amplified, producing an amplified polariton active medium output laser beam and a depleted driver laser beam. Egressing optics receives the amplified polariton active medium output laser beam and the depleted driver laser beam. The egressing optics controllably transmits the amplified polariton active medium output laser beam in accordance with third desired wavelength, polarization, and beam propagation parameters and prevents transmission of the depleted driver laser beam. The output of the egressing optics includes an amplified egressing optics output laser beam.

The invention relates to a signal and pumping laser hybrid integrated device which is structurally characterized in that a plurality of multimode pump laser dies, at least one single-mode signal laser die and all optical path shaping lenses and 90-degree reflectors are mounted in a same laser shell and are coupled in a same output optical fiber. An output port of each single-mode signal laser die corresponds to the optical path shaping lens and the 90-degree reflector which are in a set, an output port of each pump laser die corresponds to the optical path shaping lens and the 90-degree reflector in another set, all the 90-degree reflectors are not overlapped with one another in space, and corresponding reflected light of all the 90-degree reflectors aligns with a same condenser lens and is coupled to the same output optical fiber to be outputted after passing through the condenser lens, wherein signal light is coupled to a fiber core of the output optical fiber, and pump light is coupled to the section of the output optical fiber. The signal and pumping laser hybrid integrated device structurally substitutes for a traditional complicated optical path system and is simpler in optical design, compact, reliable and stable in structure and excellent in performance.

The invention relates to a day-and-night dual-purpose lens system free of day-and-night confocal design and an implementation method thereof. The day-and-night dual-purpose lens system comprises a lens, a chip and a light filter switcher, wherein the light filter switcher is arranged inside the lens or is arranged at the front end of the lens or is arranged between the lens and the chip; a light filter I and a light filter II used for days and nights respectively are arranged on the light filter switcher; the light filter I and the light filter II are vertical to an optical axis and can be switched to the position of the optical axis for filtering light with different wave bands respectively; the light filter I is an infrared light cut-off filter capable of filtering infrared light; and the light filter II is a visible light cut-off filter capable of filtering visible light. The system and the method do not need to take a complicated day-and-night confocal design of the lens into account, a day-and-night confocal effect can be realized through a simple structure or method, and the system is low in manufacturing cost and excellent in performance.

A photographic device includes an image sensor in which a plurality of pixels are arrayed. A horizontal scan circuit selects in order vertical drive lines to which the pixels are connected. And a vertical scan circuit reads voltages, due to accumulated electric charges, from the pixels in the horizontal row which is selected. A plurality of lenses are provided to the image sensor, arranged along the direction parallel to the vertical drive lines. Each of these lenses images an image of the same photographic region upon a pixel region which it confronts. The accumulated electric charges are read out from each pixel, arrayed in order. An image processing unit acquires a plurality of images of the photographic region spaced apart in time. And a moving body detection unit performs moving body detection from the differences between this plurality of images of the photographic region.

The invention discloses an imaging objective lens suitable for an RGB-D camera. A first lens, a first spacer ring, a second lens and a third lens which are attached in a lens cone in sequence from the objective space to the image space form the imaging lens. The imaging objective lens is of a three-piece spherical mirror structure, one mirror surface of each lens is a plane, the other mirror surface of each lens is a spherical surface, and thus machining cost is low; meanwhile, the second lens and the third lens are tightly attached, no spacer ring is needed, and thus the imaging objective lens is compact in structure and small in size; besides, the three lenses are the same in radius, and thus the assembling process is simple. In a broad spectrum region from visible light to near infrared rays, imaging definition is high, optical performance is excellent, and a large view field of 65 degrees and distortion smaller than 3.2% can be achieved. The imaging objective lens is suitable for a deep imaging system with infrared-assisted lighting and achieves user-friendly and easy-to-use natural man-machine interaction.