48 results about "Trigonal prism" patented technology

The invention relates to a micro-assembly-oriented submicron precision coaxial confocal alignment detection method and device. According to the method, prism-based coaxial alignment laser confocal detection is adopted to achieve real-time imaging detection of a target part and a base part, laser confocal high-precision detection is adopted in the high-precision alignment detection process of a micro device, detection precision breaks through the diffraction limit of the traditional microscopic optical imaging, and detection precision can be smaller than 1 micron. The coaxial alignment prism structure design is the key for guaranteeing relative position error of the target part and the base part through laser confocal detection. Twice reflection of an isosceles right-triangle prism is used for achieving imaging of the target part and the base part on a laser confocal image plane, and relative position error detection calculation in the micro device assembly alignment process is guaranteed. Through combination of a high-precision base part clamping precise-adjusting platform and a target part clamping mechanical linear displacement table, the detection system can achieve submicron-precision assembly alignment precision.

The invention relates to a compact infrared viewfinder optical system based on a free-form surface prism. The dsystem comprises a free-form surface prism, a triangular prism, a narrow-band optical filter, a near-infrared detector and a long-wave infrared detector; the free-form surface prism comprises a high-order aspheric surface, a second-order reflection free-form surface, a first-order reflection free-form surface and a light splitting plane which are connected in sequence; incident light is incident through the high-order aspheric surface and then sequentially reflected through the reflection free-form surface and the second reflection free-form surface. When reaching the light splitting plane, the light is divided into near-infrared light and long-wave infrared light, the near-infrared light is transmitted and then reaches the near-infrared detector after sequentially passing through the triangular prism and the narrow-band filter, and the long-wave infrared light is reflected and then emitted from the diffraction plane and reaches the long-wave infrared detector. Compared with the prior art, the system has the advantages of good imaging quality, compact structure and the like.

A backlight assembly includes a receiving container having a receiving space, a flat-type light source, an optical member, and an inverter. The flat-type light source has a plurality of light emitting spaces spaced apart from each other and is received into the receiving space. The optical member has a prism pattern formed in areas corresponding to areas between adjacent light emitting spaces and disposed at a light emitting direction of the flat-type light source. The inverter generates a voltage for the flat-type light source. The prism pattern 1o includes prisms having a substantially trigonal prism and continuously connected one after another. Thus, the backlight assembly may improve brightness uniformity thereof and have a reduced thickness.

A head-mounted display apparatus includes a cross dichroic prism including four triangular prisms that are mutually bonded, and a first dichroic film and a second dichroic film provided between adjacent prisms of the four triangular prisms, a plurality of display panels arranged respectively opposite to a plurality of light incident planes of the cross dichroic prism, and a projection optical system configured to project light emitted from the cross dichroic prism onto a pupil of a user. The cross dichroic prism includes an optically imperfect part at a center of a bonded part of the four triangular prisms. A ratio between an aerial conversion length from each of light-emission planes of the plurality of display panels to the center of the bonded part, and a width of the optically imperfect part, is greater than or equal to 250:1.

The invention discloses a large-view-field compact near-to-eye display device, and the device comprises a self-luminous LCOS module, an optical-mechanical module, a coupled-in triangular prism, a waveguide plate and a coupled-out module. The self-luminous LCOS module comprises an LCOS displayer provided with a white light LED. The optical machine module comprises a linear polarizing film, a PBS, afirst quarter-wave plate, a concave reflector, a second quarter-wave plate and a convex reflector. The incident plane of the optical-mechanical module is parallel to the self-luminous LCOS module, the upper end surface and the lower end surface of the waveguide plate are parallel, and a first preset included angle is formed between the waveguide plate and the emergent plane coupled into the triangular prism; the coupling-out module comprises a color multiplexing body holographic grating manufactured based on the angle multiplexing technology, is attached to the upper end face of the waveguidesheet and is used for coupling out polarized light transmitted by the waveguide sheet. According to the invention, the multiplexed color volume holographic grating manufactured based on the angle multiplexing technology is used as an optical coupling-out device, so that the dynamic range of human eye observation is greatly increased, and the field of view is expanded.

The invention belongs to the technical field of optical couplers, and particularly relates to a nonlinear optical crystal laser frequency conversion coupler which comprises a nonlinear crystal. Triangular prisms are adhered to two sides of the nonlinear crystal through optical cement. The connection part between the triangular prism and the non-linear crystal is bonded through optical cement, so that the middle part between the triangular prism and the non-linear crystal is a hollow cavity. Expansion holes which are uniformly distributed are formed in the periphery of the optical cement. Injection ports in one-to-one correspondence with the expansion holes are formed in the surface of the optical cement. The expansion holes are designed to be oval. Uniformly-arranged plastic belts are arranged on the side, away from the cavity, of the expansion hole in the optical cement. According to the invention, the inclination angle of the triangular prism can be changed under the condition that the light position is not changed, so that the incident angle of the light is adjusted, and meanwhile, the influence on the precision of light multiplying power conversion due to a difference value ofmultiplying power conversion caused by incapability of realizing fine adjustment by manually moving the laser or coupler is avoided.

The invention discloses an auxiliary alignment device and method for beams of a double-beam light trap. The device is placed at the center of the light trap, and is characterized in that a pair of triangular prisms are right-angled triangles which are arranged in a mode that the planes where the right-angle edges on one sides are located are completely connected in an attached manner and the planes where the right-angle edges on the other sides are located are arranged in parallel to form a parallelogram prism, a plane mirror is horizontal with the reflecting surface facing upward, one of theplanes where the right-angle edges on the other side are located is fixedly arranged on one half side of the plane mirror in an attached manner, and the plane where the bevel edges of the pair of triangular prisms are located is plated with a semi-transparent semi-reflecting film; a pair of four-quadrant position detectors are horizontally arranged on the same plane and located above the plane mirror and the pair of triangular prisms. According to the invention, optical adjustment of the beams of the light trap can be simply and effectively assisted, the performance of the light trap is improved, and an efficient, rapid, convenient and consistent adjustment scheme is provided for a light force suspension system taking the light trap as a core component.

The present invention is selective micro machining method and system for different materials with near field optical virtual light probe. The present invention proposes selective micro machining with near field optical virtual light probe in nanometer size and provides one designed micro machining system. After the laser beam the laser emits after passing through the light filter and the polarizer is incidenced to the triangular prism, the refracted laser beam may be total internally reflected and the reflected laser beam out of the other side of the triangular prism is made to pass through the optical delayer and reflected by the reflector to the bottom of the triangular prism along the original path to form the virtual light probe. The material to be machined is set in certain distance below the bottom of the triangular prism for micro machining with the virtual light probe while being micro shifted with some miniature stage. The present invention has raised micro machining precision.