Abstract: A detachable antenna and an electronic device are provided. The detachable antenna includes a connector, an antenna module, and a light-emitting module. The light-emitting module includes a light-emitting unit and a bias circuit. The bias circuit includes an input end, a first output end, and a second output end. The input end of the bias circuit receives a mixed signal from the connector. The mixed signal includes a communication signal and a drive signal. The first output end of the bias circuit outputs the communication signal to the antenna module. The second output end of the bias circuit outputs the drive signal to the light-emitting unit. The detachable antenna of the disclosure is integrated with the light-emitting module and receives the mixed signal from a single input end to implement communication and light emitting functions simultaneously.

Abstract: An optical element includes a holographic pinhole array. The holographic pinhole array includes a plurality of holographic pinhole grating sets. The holographic pinhole grating sets are configured to diffract light incident on the optical element into a plurality of light beams respectively. Each of the light beams has a field of view.

Abstract: A method of manufacturing a holographic element used in a projection device is provided. The projection device has a light source configured to emit light conforming to a non-uniform light intensity distribution function. The method includes: multiplying the non-uniform light intensity distribution function by a diffraction intensity and angle function of a grating to obtain a product function; determining whether the product function is substantially equal to 1 in a predetermined range of angle or wavelength; if the the determination result is yes, determining a pair of incident angles respectively of a reference beam and a signal beam according to the diffraction intensity and angle function; and recording a holographic material with the reference beam and the signal beam respectively at the pair of incident angles, so as to manufacture a holographic element with the grating therein.

Abstract: A waveguide device includes a first diffractive element, a second diffractive element, a third diffractive element, and a waveguide element. The first diffractive element is configured to diffract light of a wavelength to propagate with a diffraction angle. The second diffractive element is configured to diffract the light of the wavelength to propagate with the diffraction angle. The third diffractive element is configured to diffract the light of the wavelength to propagate with the diffraction angle. The waveguide element is configured to guide the light of the wavelength to propagate from the first diffractive element to the second diffractive element and the third diffractive element. Diffraction efficiencies of the second diffractive element and the third diffractive element are different.

Abstract: An electronic apparatus includes a housing and a covering structure. The housing has a light transmission portion. The covering structure includes a plurality of coating layers sequentially stacked above the light transmission portion. The coating layers respectively have different thicknesses, different refractive indices, different reflectivities, and different transmissivities. Reflected light of the coating layers presents a virtual image with a pattern.

Abstract: A process is provided for preparing fertilizer. The process includes the steps of combining a titanium composition and a silicon composition to yield a mixture, removing heavy metals from the mixture, controlling conductivity of a quantity of water in the mixture to below a predetermined amount, adding other materials to the mixture in a predetermined ratio, adding oxygen to the mixture, vibrating the mixture to minimize sticking, irradiating the mixture, and mixing the mixture with a high speed pump.

Abstract: A method of manufacturing an optical element includes steps of: exposing a photopolymer to a plurality of kinds of light for a plurality of cycles, in which each of the cycles includes a plurality of exposure time sequences respectively corresponding to the kinds of light, and any adjacent two of the exposure time sequences of the cycles correspond to two of the kinds of light; and fixing the exposed photopolymer to form a holographic optical element having a plurality of holographic gratings respectively formed by the kinds of light.

Abstract: A detachable antenna and an electronic device are provided. The detachable antenna includes a connector, an antenna module, and a light-emitting module. The light-emitting module includes a light-emitting unit and a bias circuit. The bias circuit includes an input end, a first output end, and a second output end. The input end of the bias circuit receives a mixed signal from the connector. The mixed signal includes a communication signal and a drive signal. The first output end of the bias circuit outputs the communication signal to the antenna module. The second output end of the bias circuit outputs the drive signal to the light-emitting unit. The detachable antenna of the disclosure is integrated with the light-emitting module and receives the mixed signal from a single input end to implement communication and light emitting functions simultaneously.

Abstract: The disclosure provides an augmented reality (AR) information transmission system and an AR information transmission method. The AR information transmission system includes a wireless information transmission device. The wireless information transmission device includes a directivity transmitter and a processor. The processor is configured to: obtain AR information and convert the AR information into a wireless signal; and control the directivity transmitter to send the wireless signal toward a designated direction.

Abstract: The head mounted display device includes a tube, a reflecting mirror, an infrared camera, and an imaging lens. The reflecting mirror is arranged in the tube. The reflecting mirror has a first plane and a second plane connected in sequence, wherein the first plane and the second plane have normal vectors that are not parallel to each other. The infrared camera receives the reflected image beam from the second plane of the reflecting mirror, wherein the second plane of the reflecting mirror receives the image beam to generate the reflected image beam. The imaging lens is arranged at the first open end of the tube.

Abstract: A waveguide device includes a first diffractive element, a second diffractive element, a third diffractive element, and a waveguide element. The first diffractive element has a first grating configured to diffract light of a wavelength to propagate with a first diffraction angle. The second diffractive element has a second grating configured to diffract the light of the wavelength to propagate with a second diffraction angle. The third diffractive element has a third grating and a fourth grating. The third grating is configured to diffract the light of the wavelength to propagate with the first diffraction angle. The fourth grating is configured to diffract the light of the wavelength to propagate with the second diffraction angle. The waveguide element configured to guide light propagated from the first diffractive element and the second diffractive element to the third diffractive element.

Abstract: A traceable optical device is capable of being tracked by an electronic device having an image sensor. The traceable optical device includes a light guide member, at least one light source, and a shielding member. The light guide member has at least one light-incident surface and a light-emitting surface connected to each other. The light source is configured to emit light into the light guide member from the light-incident surface. The shielding member shields the light guide member and has at least one light transmission area.

Abstract: Provided is a method and system for uniform execution of feature extraction. The method comprises: acquiring a feature extraction script for defining a processing logic related to feature extraction; analyzing the feature extraction script to generate an execution plan for feature extraction; and executing the generated execution plan by a local machine or a cluster based on a feature extraction scene. Based on the method and system, feature extraction can be uniformly executed at various feature extraction scenes.

Abstract: A head-mounted display includes an optical component. The optical component includes a plurality of micro lenses and a central lens. The micro lenses are connected to each other. The central lens is connected among and surrounded by the micro lenses. The central lens and the micro lenses are substantially arranged along a plane.

Abstract: An image display system includes a projector, an image display element, and at least one actuator. The projector is configured to project laser light. The image display element is configured to display an image using the projected laser light. The at least one actuator is configured to vibrate the image display element.

Abstract: The head mounted display device includes a tube, a reflecting mirror, an infrared camera, and an imaging lens. The reflecting mirror is arranged in the tube. The reflecting mirror has a first plane and a second plane connected in sequence, wherein the first plane and the second plane have normal vectors that are not parallel to each other. The infrared camera receives the reflected image beam from the second plane of the reflecting mirror, wherein the second plane of the reflecting mirror receives the image beam to generate the reflected image beam. The imaging lens is arranged at the first open end of the tube.

Abstract: A waveguide device includes two diffractive optical elements, a waveguide element, and two polarizing units. Each of the diffractive optical elements has a grating configured to diffract light of a wavelength to propagate with a diffraction angle. The waveguide element is configured to guide light propagated from one of the diffractive optical elements to the other of the diffractive optical elements. The polarizing units are at opposite surfaces of the waveguide element and optically coupled between the diffractive optical elements. Each of the polarizing units is configured to reflect light of a first polarization characteristic and transmit light of a second polarization characteristic.

Abstract: The disclosure provides an augmented reality (AR) information transmission system and an AR information transmission method. The AR information transmission system includes a wireless information transmission device. The wireless information transmission device includes a directivity transmitter and a processor. The processor is configured to: obtain AR information and convert the AR information into a wireless signal; and control the directivity transmitter to send the wireless signal toward a designated direction.

Abstract: A projection apparatus includes a light source, a light reflective member, a light valve, and a light beam adjusting member. The light source is configured to provide an illumination beam. The light reflective member is configured to reflect the illumination beam. The light valve is configured to convert the illumination beam reflected by the light reflective member into an image beam. The light beam adjusting member is optically coupled between the light source and the light reflective member and includes a collimating lens module. The collimating lens module has a light entering surface and a light leaving surface respectively at opposite sides thereof. The light entering surface and the light leaving surface respectively have a first optical axis and a second optical axis extending along different directions.