52results about How to "Reduce optical path difference" patented technology

A projection optical system is configured to project an image of an object plane onto an image plane, and includes a first optical element having an aspheric shape that is rotationally asymmetric with respect to an optical axis, a moving unit configured to move the first optical element in a direction perpendicular to the optical axis, and a second optical element fixed on the optical axis, and configured to reduce an optical path length difference caused by an aspheric surface of the first optical element, the second optical element having no aspheric shape complement to the aspheric shape of the first optical element.

The invention discloses an interferometer used for a Fourier transformation spectrograph. The interferometer comprises a spectroscope, a third plane mirror, a fourth plane mirror, a movable mirror and a fixed mirror, wherein the movable mirror and the fixed mirror are arranged on light beam paths between the spectroscope and the third plane mirror as well as between the spectroscope and the fourth plane mirror respectively. The movable mirror and the fixed mirror are designed to be of an integrated structure capable of synchronously swinging or rotating. The interferometer can fundamentally eliminate optical path detuning caused by movement errors of a movable mirror bracket and a fixed mirror bracket independent of the movable mirror bracket. The precision and stability of the interferometer in the Fourier transformation spectrograph are improved, and a larger optical path difference can be obtained under the same swinging or rotating angle.

An object of the present application is to thin a thick lens used in an automobile headlamp optical system and a projector lighting optical system while maintaining the optical properties of the lens. A diffractive lens includes, on at least one surface, an optical surface with a plurality of areas defined by a plurality of steps. A blaze wavelength of the diffractive lens is within a wavelength spectral range of a light source used. An optical path difference between adjacent areas at the blaze wavelength is larger than a coherence length of the light source. The diffractive lens substantially acts as a Fresnel lens at a wavelength other than the blaze wavelength.

The invention belongs to the technical field of sensing, and provides an on-line dualbeam interference-type fiber refractive index sensor. The dualbeam interference-type fiber refractive index sensor comprises first single-mode fiber, light splitting fiber, offset-welded sensing single-mode fiber and reference single-mode fiber, light composition fiber and second single-mode fiber; while measuring, the sensing single-mode fiber is positioned in a to-be-checked substance; the wide spectrum light is input from the first single-mode fiber, then is coupled to the sensing single-mode fiber, and is subjected to propagation by a fiber core mode and a cladding mode and then mode transition, the fiber core mode is coupled to a cladding layer for continuous propagation, the partial energy of the cladding mode is coupled in the fiber core for continuous propagation, the light output by the reference single-mode fiber is subjected to light composition interference in the light composition fiber and is output through the second single-mode fiber, wavelength demodulation is carried out, and the refractive index change is obtained. Due to the light path compensation of the reference single-mode fiber, interference fringe drift distance is large, sensitivity is higher; the cooperation of the sensing single-mode fiber and the reference single-mode fiber have temperature compensating effect, so that the interference immunity and detection precision of the sensor are increased.

The invention provides an optical fiber conduction device in a chemical light emission measuring chamber. The optical fiber conduction device comprises a photomultiplier and a reaction cup opposite to the photomultiplier, wherein the reaction cup is arranged on one side of a measuring window of the photomultiplier; an optical fiber is arranged between the photomultiplier and the reaction cup; one end of the optical fiber is close to the measuring window of the photomultiplier; the other end of the optical fiber is close to a light emission area of the reaction cup. According to the optical fiber conduction device in the chemical light emission measuring chamber, the optical fiber for light conduction is additionally arranged at the measuring window of the photomultiplier and the light emission area of the reaction cup, the optical path difference caused by the distance from the light emission area of the reaction cup to the measuring window of the photomultiplier is reduced, the measurement errors caused by the optical path difference are reduced, and the measurement result is relatively accurate and stable.

A compound lens and a related method of manufacture are provided. The compound lens includes a first lens element and a second lens element such that a light emitting surface of the first lens element is integrally joined to a light receiving surface of the second lens element, the first and second lens element being in optical alignment with each other. The first and second lens element are molded from optical grade silicone and can achieve complex illumination objectives not possible with single lens constructions. The method of manufacture includes injecting a silicone resin molding compound into a mold cavity having the desired shape of the compound lens. The method of manufacture can include over-molding a lens holding member onto the compound lens and adding electro-optically active particles to a surface of the compound lens or to the silicone resin forming the compound lens.

Provided are a device for enlarging a clear aperture of a laser crystal, and an installing method of the device for enlarging the clear aperture of the laser crystal. The device for enlarging the clear aperture of the laser crystal comprises the laser crystal, a fixing support, a first bolt and a second bolt. According to the position relation of the components, the fixing support comprises two identical fixtures, each fixture is of a cylinder structure, the inner side of each fixture is of a right-angle shape, the outer side of each fixture is round, a first screw hole and a second screw hole are formed inside the two fixtures, and are perpendicular to the combining faces of the two fixtures, the two bolts penetrate through the first screw hole and the second screw hole to form an outer cylinder, a long square hole is formed in the outer cylinder, the long square hole and the outer cylinder are concentric, and the spliced laser crystal is placed in the square inner hole of the fixing support, and is locked through the first bolt and the second bolt. The device for enlarging the clear aperture of the laser crystal and the installing method of the device for enlarging the clear aperture of the laser crystal effectively enlarge the clear aperture of the laser crystal, can reduce parasitic oscillation and the heat effect, and have the advantages of being easy to adjust, convenient to install, stable in structure and low in cost.

The invention relates to an image detecting device comprising an illuminating system and a sensing system, wherein the illuminating system is used for supplying a light beam to a reflecting surface inorder to generate a reflecting light beam; the sensing system comprises a sensing element and a focusing element, the sensing element is arranged on a transmitting path of the reflecting light beam to receive the reflecting light beam, the focusing element is arranged between the sensing element and the reflecting surface, and an optical axis of the focusing element deviates a primary optical axis of the reflecting light beam. Because the optical axis of the focusing element deviates from the primary optical axis of the reflecting light beam in order to reduce the optical path difference of light beams of the reflecting light beam, the image detecting device has optimal imaging quality.

The embodiment of the invention discloses a display panel, a manufacturing method thereof and a display device. The display panel includes at least a first display area which has a first sub-pixel. The first display area includes a first substrate, a first electrode on one side of the first substrate, and a first pixel-defining layer which is located on one side, which is away from the first substrate, of the first electrode. The first pixel-defining layer includes a first pixel opening which includes a first light-emitting layer, and a second electrode which is located on one side, which is remote from the first substrate, of the first light-emitting layer. The first display area further includes a spacer. The spacer is arranged on one side, which is away from the first substrate, of thefirst pixel-defining layer. The size of the orthogonal projection of the surface of one side, which is away from the first substrate, of the spacer on the first substrate is larger than the size of the orthogonal projection of the surface of one side, which is near the first substrate, of the spacer on the first substrate. A recessed structure is arranged on the surface of one side, which is awayfrom the substrate, of the spacer. The optical path difference of light passing through the spacer can be reduced, thereby reducing the diffraction phenomenon.

The invention discloses a display panel and electronic equipment. The display panel is provided with a display area and a blind hole area. The display panel comprises an array substrate and a color film substrate which are oppositely arranged; a liquid crystal layer is positioned between the array substrate and the color film substrate; the array substrate is provided with a plurality of pixel units, wherein the pixel units are located in the display area, and the vertical projections of the pixel units on the array substrate are not overlapped with the vertical projections of the blind hole area on the array substrate; and the blind hole area is provided with a driving electrode, and the driving electrode is used for controlling deflection of liquid crystal molecules in the blind hole area. The display panel is provided with the driving electrode in the blind area, and liquid crystal molecules in the blind hole area can be controlled to deflect through the driving electrode, so that the refractive index of the liquid crystal layer in the blind hole area is adjusted, and the optical path difference of the blind hole area is reduced or even eliminated.

The present invention is suitable for the technical field of projection display, and provides a stereoscopic projection light polarization modulation device. The stereoscopic projection light polarization modulation device comprises: a polarization beam splitting module configured to perform light beam splitting of a projection light beam carrying image information into two transmitting light beams and two reflection light beams, wherein polarization states of the two transmitting light beams are different, and polarization states of the two reflection light beam are also different; a first optical path direction regulation module configured to regulate a propagation direction of a first reflection light beam; a second optical path direction regulation module configured to regulate a propagation direction of a second reflection light beam; and a polarization state conversion module configured to perform polarization state modulation of some or all of the two transmitting light beams and the two reflection light beams and allow the two transmitting light beams and the two reflection light beams after modulation to have the same polarization state. Compared to a polarization light splitting mode of a dual optical path, the stereoscopic projection light polarization modulation device and method, and the stereoscopic image projection system can effectively reduce the optical path difference of the reflection light beams and the transmitting light beams and can greatly reduce the size of the whole device.

An object of this invention is to provide an image output apparatus which outputs a high-quality image by using a small number of pixel clock generation units. This invention provides an image output apparatus which is connected to a printing engine, having a plurality of laser beam control units for controlling a plurality of laser outputs on the basis of input video signals, comprising a plurality of output units which output video signals based on print data to the respective laser beam control units in synchronization with a clock signal; and a plurality of clock control units which are arranged in correspondence with respective groups, that are prepared by grouping said plurality of output units, so as to decrease an optical path difference between laser beams controlled by the corresponding laser beam control unit, wherein each of said clock control units generates the clock signal on the basis of a synchronizing signal generated in image forming operation of the printing engine, and outputs the generated clock signal to output units belonging to a corresponding group.

The present invention provides a liquid crystal display (LCD) apparatus. The LCD apparatus comprises a TFT-LCD module and a corresponding phase retarder, and a light adjustment plate is disposed between the TFT-LCD module and the phase retarder and configured to reduce an optical path difference of a light emitted from the phase retarder. Alternatively, the TFT-LCD module comprises a light adjustment plate configured to reduce the optical path difference of the light emitted from the phase retarder. The present invention can mitigate crosstalk when viewing 3D images.

The invention discloses a straight waveguide phase modulator, an integrated assembly and a preparation method. A lithium tantalate crystal with a smaller birefringence effect is used as a substrate crystal of the straight waveguide phase modulator, the optical path difference of orthogonal polarization light waves is smaller, and the transmission loss and the coupling loss related to polarization are lower. In addition, a Y-branch waveguide coupler with the functions of a polarizer and a coupler and a straight waveguide phase modulator are integrated on the same lithium tantalate wafer. An optical fiber current transformer system based on the integrated assembly is higher in reliability, lower in assembly complexity and lower in manufacturing cost.

The present invention discloses a semiconductor element and a method for manufacturing the same. The semiconductor element includes a substrate, a sensor, a dielectric layer, and a light pipe structure. The sensor is located in the substrate. The dielectric layer is located on the substrate. The light pipe structure is filled into the grooves in the dielectric layer. The light pipe structure corresponds to the sensor. The light pipe structure has a graded refractive index. The graded refractive index decreases from the center of the light pipe structure to the peripheral area.

The invention provides a display panel, a manufacturing method thereof and a display device, and relates to the technical field of display. The invention provides the display panel. The display panelcomprises a substrate and a plurality of organic light-emitting devices arranged on the substrate, and at least two optical coupling layers which are arranged on the organic light-emitting device. Forany two adjacent optical coupling layers, the optical coupling layer far away from the substrate covers the optical coupling layer close to the substrate, and the refractive index of the optical coupling layer far away from the substrate is less than that of the optical coupling layer close to the substrate. Through at least two optical coupling layers, the display panel enables the wavelength difference of emergent rays to be reduced for light rays at different incident angles, so that the color cast caused by the visual angle is improved.