To provide a laser irradiation apparatus which suppresses adhesion of foreign matters to an optical element, a laser irradiation device includes: emission optical systems, which form a beam in which laser light generated by a laser oscillator converges on a predetermined beam spot, and continuously change an irradiation direction or the like of the beam; and a protective member which is arranged between the emission optical system and the beam spot, and protects the emission optical system from foreign matters scattered from an irradiation object side, and the protective member has an aperture through which the beam passes and moves in connection with a change of the irradiation direction or the like of the beam so that the aperture is positioned on a path of the beam.

An optical assembly for an analyzer instrument for analysis of elemental composition of a sample using optical emission spectroscopy includes: an exciter generating an excitation focused at a target position to produce optical emission from the sample; and an optical arrangement including a light collection arrangement transferring the optical emission from the target position to a detector assembly's detector interface. The light collection arrangement includes: an off-axis parabolic light collecting mirror including an aperture, a lens arrangement including converging and diverging axicon lens portions, the lens arrangement positioned so its optical axis is parallel to that of the light collecting mirror and intersects a surface of the light collecting mirror at the aperture, and an off-axis parabolic focusing mirror having its focal point at the detector interface, the optical axis of the lens arrangement being parallel to that of the focusing mirror and intersects the focusing mirror's surface.

An optical sensing device includes a substrate, a sensing element layer, a light-shielding layer, and a light absorbing layer. The substrate has a first surface and a second surface opposite to each other. The sensing element layer is disposed on the first surface and includes multiple sensing elements. The light-shielding layer is disposed on the sensing element layer and has multiple openings. An orthogonal projection of the opening on the substrate overlaps an orthogonal projection of the sensing element on the substrate. The light absorbing layer is disposed on the second surface. An electronic apparatus including the optical sensing device is also provided.

A prism module manufacturing method includes the following steps of: adjusting a first prism and a second prism to have a predetermined temperature difference; using an adhesive layer to be partially connected between the first prism and the second prism so that there is a gap between the first prism and the second prism, wherein the adhesive layer includes a glue material and a plurality of spacers arranged in the glue material. The invention further provides a prism module and a projection device having the prism module. The prism module and the manufacturing method thereof of the invention avoid the interference problem in the prism module so that the image quality and reliability of the projection device can be improved.

The present disclosure provides a sub-wavelength structural material having compatibility of low detectability for infrared, laser, and microwave, which includes, from top to bottom, a metal type frequency selective surface layer I, a dielectric layer I, a metal type frequency selective surface layer II, a dielectric layer II, a resistive film, a dielectric layer III. Each of the metal type frequency selective surface layers is a sub-wavelength patch type array, and metal used by the metal type frequency selective surface layers has a characteristic of low infrared emissivity. The present disclosure modulates a phase by using a phase difference generated by patches with different sizes on the metal type frequency selective surface layer I, so as to control backscattering of incident electromagnetic waves to achieve compatibility of low detectability for laser and infrared, while the bottom three layers achieve absorption of microwave.

An optical lens assembly includes at least one lens element, which is a dual molded lens element. The dual molded lens element includes a light transmitting portion and a light absorbing portion. The light absorbing portion is annular and surrounds a central axis, wherein a plastic material and a color of the light absorbing portion are different from a plastic material and a color of the light transmitting portion, the dual molded lens element is made by an injection molding method and formed integrally, the light absorbing portion includes a plurality of second inner strip-shaped structures, the second inner strip-shaped structures are regularly arranged along a circumferential direction of the central axis, and the second inner strip-shaped structures are disposed correspondingly to and connected to a plurality of first inner strip-shaped structures.

A system and method of imaging an object uses a plasmonic layer as a sample holder defining a periodic array of sub-micron structures adjacent the object. The sample holder is exposed to a first portion of light that is transmitted through either the plasmonic layer but not the object, or the plasmonic layer and a first section of the object, and a second portion of the light that is transmitted through the plasmonic layer and at least a second section of the object. The light interacts with at least the plasmonic layer and the first portion of the transmitted light characterizes one or more first surface plasmon resonance peaks and the second portion of the transmitted light characterizes one or more second surface plasmon resonance peaks that are wavelength shifted from the first surface plasmon resonance peaks by the object affecting plasmons propagating within the plasmonic layer.

A window member including a base substrate and a light shielding layer including a first light shielding pattern disposed in a first area of the base substrate and a second light shielding pattern disposed in a second area of the base substrate while being spaced apart from the first light shielding pattern and providing a signal transmission area at an inner side thereof. The second light shielding pattern includes an edge having a plurality of curved portions on a plane. This arrangement reduces an area of the light shielding pattern adjacent to the signal transmission area of the window member.

An imaging device may code light, passing through an imaging optical lens arranged in a multi-lens array (MLA), and may transmit the light to a sensing element, and the sensing element may restore an image based on sensed information.

A two-layer retroreflective article construction is enabled that produces higher wide-entrance-angle performance for signs and pavement markings. A single-layer overlay is enabled for existing signs and pavement markers that improve their entrance angle performance. Materials used in the construction of an article or an overlay are transparent to radiation in the range of 400 to 1000 nanometers and utilize TIR (total internal reflection). Minimum performance specifications are proposed that extend sign sheeting retroreflectivity specifications to entrance angles of 60 degrees. An innovative traffic sign design is enabled that increases the positioning performance of safety systems and automated navigation systems.