Abstract: To improve brightness of an image to be perceived by a user and enhance visibility there is provided a light guide plate including an incident diffraction grating which diffracts incident imaging light, an exit diffraction grating through which the imaging light goes out, and an intermediate diffraction grating existing in optical paths from the incident diffraction grating to the exit diffraction grating. In this light guide plate, a periodic linear corrugated pattern is formed as the incident diffraction grating, and when an imaginary line is established that passes through an incident point of imaging light onto the incident diffraction grating and is parallel with a periodic direction of the corrugated pattern, the intermediate diffraction grating has a first region on one side of the imaginary line and a second region on another side of the imaginary line.

Abstract: A display element, and a light-guiding member including a plurality of reflection surfaces and configured to guide image light from the display element by reflecting the image light at an inner surface, and cause the image light and external light to be visually recognized in an overlapping manner are provided, wherein at a boundary between a first reflection surface and a second reflection surface adjacent to each other included in the plurality of reflection surfaces of the light-guiding member with at least one of the first reflection surface and the second reflection surface including a curved surface, an end of the first reflection surface and an end of the second reflection surface match when projected from a specific direction.

Abstract: An augmented reality optical module includes a relay lens group and a reflection lens group. The relay lens group receives and converges the light emitted by the image source. The reflection lens group comprises a first lens and a second lens. The light emitted by the image source is incident to the relay lens group and converged to form the relay image at least once, the light of the last relay image is incident to a first surface of the first lens and reflected, the reflected light is incident to a first surface of the second lens and reflected, and then incident to the first lens and transmitted through the first lens to form imaging light. The ambient light is transmitted in such a manner that the ambient light is transmitted through the second lens and the first lens, sequentially, and then emitted to be superimposed on the imaging light.

Abstract: A display device includes a relay waveguide and a scanner. The scanner is configured to angularly scan image light for coupling into the waveguide, and includes a scanning reflector and a second reflector disposed between the scanning reflector and an input coupler of the waveguide. The scanning reflector has an aperture for the image light to propagate therethrough toward the second reflector. The second reflector is configured to reflect at least a portion of the image light received through the aperture back toward the scanning reflector and to transmit at least a portion of the image light reflected from the scanning reflector toward the input coupler. The arrangement enables a compact design of the display.

Abstract: An anti-forgery color conversion film includes a photonic crystal structure whose color is converted by an external stimulus such as a breath. The photonic crystal structure includes a first refractive index layer including a first polymer exhibiting a first refractive index; and a second refractive index layer which is alternately laminated with the first refractive index layer and includes a second polymer exhibiting a second refractive index. A consumer who purchases an article including the color conversion film may easily distinguish the authenticity of the article.

Abstract: A bijective coded aperture system uses mirror system with a multitude of reflector elements attached to an absorbing, such as black, substrate. Each of the reflector elements is independently placed at a different angle with respect to each other in such a manner that the image of the scene is replicated several times at the focal plane and on the image sensor. Moreover, these replicated images may be overlapping. An image processor can then execute reconstruction methods of the image to faithfully represent the scene.

Abstract: This lens unit comprises: a lens having a liquid crystal lens; a rim part that covers the peripheral edge section of the lens; a control unit that controls the liquid crystal lens; a conductive part that electrically connects the control unit and an electrode end section of the liquid crystal lens which is exposed at the peripheral edge section of the lens, and that is disposed between the rim part and the peripheral edge section of the lens; and a knob part that protrudes from the lens or rim part.

Abstract: A light guide unit includes a first phase shifter disposed on the optical path to convert the display light as the linear polarized light from the projection unit into a circularly polarized light and including a reflection surface directed to the projection member and capable of reflecting a light from the projection member side to the projection member, a second phase shifter disposed on the projection member side of the first phase shifter on the optical path and giving a ¼ wavelength phase difference to the display light converted into the circularly polarized light by the first phase shifter to convert the display light into a linear polarized light, and a linear polarizer on the projection member side of the second phase shifter on the optical path. The linear polarizer guides the display light converted into the linear polarized light by the second phase shifter toward the projection member.

Abstract: A control circuit includes a first control circuit generating a first drive control signal from a pre-drive signal (that is a frequency at which an opening angle of the first and second mirrors is equal) for the first mirror. A second control circuit generates a second drive control signal from the pre-drive signal for the second mirror. First and second drivers generate first and second drive signals for the first and second mirrors from the first and second drive control signals. The first and second drive control signals are generated so that the first and second drive signals each have a same frequency as the pre-drive signal but are different in amplitude from one another to cause the first and second mirrors to move at a same frequency, with a same and substantially constant given opening angle as one another, and in phase with one another.

Abstract: An augmented reality (AR) device including a variable focus lens of which a focal length may be changed by adjusting refractive power and adjusting the position of a focus adjustment region of the variable focus lens according to a direction of the user's view. The AR device may obtain an eye vector indicating a direction of the user's view using an eye tracker, adjust a refractive power of a first focus adjustment region of a first variable focus lens to change a focal length for displaying a virtual image, and complementarily adjust a refractive power of a second focus adjustment lens with respect to the adjusted refractive power of the first focus adjustment region.

Abstract: The invention relates to methods for computing holograms for holographic reconstruction of two-dimensional and/or three-dimensional scenes in a display apparatus, wherein a scene for reconstruction is broken down into object points and the object points are encoded as sub-holograms into at least one spatial light modulation device of the display apparatus. A reconstructed scene is viewed from a region of visibility. At least one virtual plane of the at least one spatial light modulation device is stipulated on the basis of a real plane of the spatial light modulation device. A computation of sub-holograms is performed in the at least one virtual plane of the at least one spatial light modulation device.

Abstract: A polarizer, a display panel and a display device including the polarizer are provided. The polarizer includes: a first polarizing layer, a first protective film and a first pressure-sensitive adhesive layer. The first polarizing layer includes a first hollow portion and a first polarizing portion surrounding the first hollow portion. The first protective film covers the first hollow portion and the first polarizing portion. The first pressure-sensitive adhesive layer is located at a side of the first polarizing layer facing away from the first protective film. With the display panel and the display device including the polarizer, since the first hollow portion is disposed in the first polarizing portion, an image collecting device such as a camera can be disposed in the polarizing region, thereby improving utilization of the surface area of the polarizer provided by the embodiments of the disclosure, and increasing the screen-to-body ratio.

Abstract: An optical member driving mechanism is provided, including a fixed portion, a movable portion, and a driving module, wherein the movable portion is movably connected to the fixed portion and includes an optical member holder and a spacing member. The optical member holder can support an optical member and has a surface facing the optical member. The optical member can change the moving direction of an external light. The spacing member is disposed between the surface and the optical member, and a gap is formed between the surface and the optical member. The driving module can drive the movable portion to move relative to the fixed portion.

Abstract: The embodiments of the disclosure provide an optical system and an image enlargement device. The optical system may include a display and an optical component disposed between the display and a viewing position. The optical component may include a first reflective element and a second reflective element. The first reflective element is configured to receive an incident light emitted from the display. The second reflective element is disposed on a reflected light path of the first reflective element, and configured to receive the incident light reflected by the first reflective element and reflect the reflected incident light to a viewing position. The first reflective element and/or the second reflective element having a function of concentrating light. Therefore, when the user looks at a display of a mobile phone or a terminal, the display is enlarged by the even reflection of the first reflective element and the second reflective element, thereby improving the user experience and comfort.

Abstract: An optical element includes an optical surface configured to receive light at a predetermined wavelength in a range from about 400 nm to about 1000 nm. The optical surface is defined by a vertical axis and a horizontal axis defining four Cartesian quadrants sequentially numbered in a counter-clockwise direction. A first longitudinal section of the optical surface is centered on the vertical axis and a second longitudinal section of the optical surface is centered on the horizontal axis. The first and second longitudinal section each extend across opposite edges of the optical surface and have a same substantially uniform retardance for substantially normally incident light. The optical element includes four discrete retarder sections. Each retarder section is disposed on a respective Cartesian quadrant of the optical surface and has a retardance difference from the substantially uniform retardance of the optical surface that is greater than zero.

Abstract: An optical isolator for use with high power, collimated laser radiation includes an input polarizing optical element, at least one Faraday optical element, at least two reflective optical elements for reflecting laser radiation to provide an even number of passes through said at least one Faraday optical element, at least one reciprocal polarization altering optical element, an output polarizing optical element, at least one light redirecting element for remotely dissipating isolated or lost laser radiation. The isolator also includes at least one magnetic structure capable of generating a uniform magnetic field within the Faraday optical element which is aligned to the path of the collimated laser radiation and a mechanical structure for holding said optical elements to provide thermal gradients that are aligned to the path of the collimated laser radiation and that provide thermal and mechanical isolation between the magnetic structure and the optical elements.

Abstract: Provided is a head up display for a vehicle. The head up display for the vehicle may include an imaging mechanism for emitting a linearly-polarized light in a first direction and a linearly-polarized light in a second direction orthogonal to the first direction, a first reflection mirror for reflecting a light to a windshield of the vehicle, a polarization reflection mirror spaced apart from the first reflection mirror wherein the polarization reflection mirror transmits the linearly-polarized light in the first direction and reflects the linearly-polarized light in the second direction, and a second reflection mirror spaced apart from the polarization reflection mirror wherein the second reflection mirror reflects the light transmitted through the polarization reflection mirror to the polarization reflection mirror.

Abstract: The invention relates to a device comprising a beam splitter and a method of using the device. The device comprises a beam emitting unit and a downstream beam splitter, which is formed by two adjacent planar plates of different materials. For a specified wavelength range of an optical beam from which a partial beam is to be coupled out by reflection, the material of the first planar plate has a minimum refractive index which is greater by a refractive index interval than the maximum ref ractive index of the material of the second planar plate. From the optical beam, which, collimated and linearly polarized parallel to a plane of incidence, impinges on the beam splitter at a certain angle of incidence, the partial beam having only a small summary percentage of the optical beam and a small spectral fluctuation range is coupled out.

Abstract: A method for controlling an optical device including a movable section including an optical section that refracts incident video image light and outputs the refracted video image light and a holding section that supports the optical section, and an actuator that causes the movable section to swing, the method including applying a drive signal to the actuator to cause the movable section to swing. The drive signal is a wave having a trapezoidal waveform, and the trapezoidal wave has a first flat section where first voltage is applied for a first period, a second flat section where second voltage higher than the first voltage is applied for a second period, and a third flat section where third voltage higher than the first voltage and lower than the second voltage is applied for a third period after the first voltage is applied and before the second voltage is applied.

Abstract: A driving mechanism is provided, including a fixed portion, a movable portion, a driving assembly and a buffering element. The movable portion is movably connected to the fixed portion for holding an optical element having a main axis. The driving assembly is disposed in the fixed portion for moving the movable portion relative to the fixed portion. The buffering element is disposed between the movable portion and the fixed portion, wherein a stopping assembly is disposed on the fixed portion and/or the movable portion to limit the range of motion of the movable portion relative to the fixed portion, the buffering element is not in contact with the movable portion or the fixed portion when the movable portion is static, and the hardness of the buffering element is less than the hardness of the stopping assembly.