摘要:
An optical switching device (100, 200, 300), comprising: a substrate (103, 203, 303); a layer (102, 202, 302) of an active material disposed on the substrate (103, 203, 303), the active material being either a phase change material or a material which, by changing its stoichiometry, its optical properties change, wherein the active material is configured to change upon application of an external stimulus between a crystalline phase having a first refractive index and an amorphous phase having a second refractive index; and a layer (101, 201, 301) of a transparent material disposed on the layer (102, 202, 302) of active material, wherein the layer of a transparent material is a prism (101, 201, 301) defining an angle α selected such that, when a linearly polarized plane wave reaches an entrance face of the prism (101, 201, 301) and radiation is refracted and travels within the prism (101, 201, 301) until it reaches the surface of the layer (102, 202, 302) of active material, the Brewster condition is met for one of the two phases, of the active material, so that when the active material is in the phase for which the Brewster condition is met, radiation is not reflected at the interface between the prism (101, 201, 301) and the layer (102, 202, 302) of active material, while when the active material is in the other phase, radiation is reflected at said interface and leaves the optical switching device (100, 200, 300) when it reaches an output face of the prism (101, 201, 301), thus controlling the switching mode of the optical switching device (100, 200, 300) through the presence or absence of reflected light at said interface.
摘要:
An optical shaping apparatus includes: a light source unit that outputs collimated light; an optical function unit that is disposed on an optical path of the collimated light and modulates the optical path or a phase of the collimated light; and a control unit that controls operation of the optical function unit, to irradiate a target surface with modulated light produced in the optical function unit.
摘要:
A conventional optical switching engine has difficulty in producing a universal multiport switching engine being capable of (i) programmatically changing regions to be switched, (ii) generating no wavelength dependent loss, (iii) having a small Walk-off, and (iv) being usable for small to large light beams. Produced is a light beam deflecting element in which a polarization grating is fitted in parallel on an N×M transmissive birefringence modulator formed such that a transmissive variable half-wavelength liquid crystal plate is divided into rectangular extreme small pixels, and many N and M pixels thus obtained are respectively arranged in X and Y axes directions in a matrix form, the polarization grating being a grating in which a period Λ changes in an X' axis direction (direction to which a birefringence axis rotates) in accordance with a wavelength width of light.
摘要:
The present invention prevents the occurrence of cracking of a window glass plate provided in a housing part. An optical device (1) includes a window glass plate (15) which is fixed to a lid part (16) by a solder layer (17) provided between a metal coating film (15d) and the lid part (16). An edge part of the lid part (16), which edge part is located toward the window (16a), has an overhanging part (16c2) that is protruding in a direction toward a center part of the window (16a) further than an inner peripheral-side edge part of the metal coating film (15d).
摘要:
We describe methods and devices for manipulating optical signals. A method of manipulating an optical signal comprises providing a device (100) comprising a layer (106) of blue phase liquid crystal in the path of the optical signal; and applying a dynamically varying spatial pattern of voltages across the layer (106) of blue phase liquid crystal, thereby causing the refractive index of the layer (106) of blue phase liquid crystal to vary according the dynamically varying spatial pattern.
摘要:
Methods, systems, and apparatus, for optical switching. In one aspect, a wavelength selective switch includes one or more optical input ports; one or more optical output ports; a first optical wavelength dispersion element configured to separate the plurality of wavelength channels of the input optical beam; a second optical wavelength dispersion element configured to combine two or more separate optical beams each having one or more different wavelengths, into a combined beam having the plurality of wavelength channels; a polarization modulator array configured to independently change a polarization orientation of an optical beam passing through; optical components for directing optical beams corresponding to respective wavelength channels to different polarizing modulation cells; and a polarization beam splitter configured to route received optical beams to particular output paths according to polarization orientation.
摘要:
A stereoscopic imaging apparatus and method, a display, and a terminal are disclosed. A stereoscopic imaging apparatus (100) includes: a display panel (110), including a pixel array and configured to display images; and at least two lens layers (120, 130), disposed in a position corresponding to the pixel array, and configured to alternately deflect, according to applied time-multiplexing electric fields, light rays of the images displayed by all pixels (111 to 116) in the pixel array to at least four different projection directions, where a deflection angle corresponding to the at least four different projection directions is a sum of deflection angles of all of the at least two lens layers (120, 130), so that multiple persons can simultaneously view a three-dimensional stereoscopic image.
摘要:
A stereoscopic imaging apparatus and method, a display, and a terminal are disclosed. A stereoscopic imaging apparatus (100) includes: a display panel (110), including a pixel array and configured to display images; and at least two lens layers (120, 130), disposed in a position corresponding to the pixel array, and configured to alternately deflect, according to applied time-multiplexing electric fields, light rays of the images displayed by all pixels (111 to 116) in the pixel array to at least four different projection directions, where a deflection angle corresponding to the at least four different projection directions is a sum of deflection angles of all of the at least two lens layers (120, 130), so that multiple persons can simultaneously view a three-dimensional stereoscopic image.
摘要:
A multi-wavelength processor and method comprising an input (601) and plural outputs (602, 603, 604), plural inputs and one output or at least one input (711,712) and at least two outputs (703,704), a pixellated spatial light modulator (622,722), a dispersion device (620,720), and a focussing device (621,721), the processor and method being arranged to spatially distribute input light by wavelength to different transverse positions forming group of pixels on the pixellated spatial light modulator, addressing a sub-hologram on said groups of pixels of the spatial light modulator, whereby light of a respective wavelength incident on a said hologram is processed by the respective holograms and directed to a selected output.
摘要:
A scanner (300) for scanning an item (302) positioned in a scan volume (304) can include: an electronically switchable mirror (306) configured to switch between a reflective state and a transmissive state, a plurality of mirrors (310, 312), and a camera (314) having a sensor. In a method for scanning the item, the scanner (300) can repeatedly: switch the switchable mirror (306) from the reflective state to the transmissive state, image a first field of view (316) of the item (302) onto the sensor with light that reflects from at least one mirror (310) and transmits through the switchable mirror (306), switch the switchable mirror (306) from the transmissive state to the reflective state, and image a second field of view (318) of the item (302) onto the sensor with light that reflects from at least one mirror (312) and reflects from the switchable mirror (306). In some examples, the scanner (300) can synchronize the switching of the switchable mirror (306) to a frame rate of the sensor.