11 results about "Optical tape" patented technology

The application discloses a wavelength widely adjustable optical band-stop filter, comprising an optical transparent medium grating, a two-dimensional material layer, an optical medium layer and a metal film substrate, characterized in that the optical transparent medium grating and the two-dimensional material layer are arranged at the top of the structure, the two-dimensional material layer is laid on the top of the optical transparent medium grating or the optical medium layer, and the metal film substrate is bonded to the bottom surface of the optical medium layer. The two-dimensional material light absorption structure is designed into a single port by the metal film substrate to block the transmitted light, so that the structure realizes perfect absorption under the condition of meeting the critical coupling. The application can widely adjust the working wavelength by changing the angle of the incident light, and keep the filtering capacity above 99%.

The invention relates to a one-dimensional pyrenyl organic framework nonlinear optical material as well as preparation and application thereof. The material is prepared from a pyrenyl amino monomer (Py) and different dialdehyde monomers (PTDE, PTBE and PDA) through direct Schiff base condensation reaction under a solvothermal condition, a series of one-dimensional linear organic framework material (COF) chain segments are constructed, and a thin film material is further prepared. The obtained material has highly ordered crystallinity, an expanded pi-conjugated skeleton and an obvious donor-acceptor (D-A) charge transfer channel. The one-dimensional pyrenyl D-A COF (Py-PTDE, Py-PTBE and Py-PDA) has the advantages that the one-dimensional pyrenyl D-A COF (Py-PTDE, Py-PTBE and Py-PDA) has the obvious RSA (Reverse Saturated Absorption) effect under the excitation of femtosecond laser (800 nm and 1550 nm) for the first time; compared with the prior art, in particular to a Py-PTDE material, the effective nonlinear absorption coefficient (beta eff) of the Py-PTDE material reaches 116.89 cm. GW <-1 > and 337.03 cm. GW <-1 > at 800 nm and 1550 nm respectively, so that the Py-PTDE material is obviously superior to a precursor material and another two COF materials, and shows a lower optical limiting threshold value at a near-infrared band. The excellent performance is mainly derived from more effective D-A interaction, narrower optical band gap and more efficient intramolecular charge transfer channel in the material. The material disclosed by the invention is simple in preparation method and high in repeatability, and the obtained COF film has excellent thermal stability and optical stability, can be directly used for preparing optical limiting devices and ultrafast optical response devices and can be applied to other three-order nonlinear optical fields.

The application discloses a kind of based on two-dimensional material and double slit waveguide nonlinear activator: the design of the nonlinear activator is based on SOI material platform, wherein the lowermost layer is silica substrate, on the basis of which silicon slit waveguide is made, and both sides are filled with silica;Then deposit aluminum oxide film on the silicon slit waveguide;Then layered two-dimensional material is transferred onto the film, and the material has saturation absorption effect on light, which is the source of nonlinearity;Then the upper layer is deposited with titanium as an adhesive layer to improve the contact stability of the metal slit waveguide and the two-dimensional material;Finally, a metal slit waveguide is made on the titanium layer to form a double slit waveguide structure, enhance the light field restriction, and improve the interaction between light and two-dimensional material. The application realizes a nonlinear activator with high response speed, large optical bandwidth, low power consumption and high integration. The application also discloses a method for manufacturing the nonlinear activator based on two-dimensional material and double slit waveguide and its application.

This invention discloses a rapid method for detecting the thickness of double-sided adhesive tape, belonging to the field of optical tape measurement technology. The method includes placing the double-sided adhesive tape to be tested flat on a testing platform, projecting a structured light pattern containing periodic bright and dark stripes onto the sample surface, acquiring images of the modulated and deformed light stripes from a position at a preset angle to the projection direction, extracting the stripe centerline data, and comparing its spatial position with the standard light stripe centerline data of a standard reference surface to generate a three-dimensional height point cloud map of the sample surface. The average surface height of the sample area and the substrate area are calculated separately, and the difference between the two is taken as the apparent total thickness of the tape. This method achieves non-contact detection of double-sided adhesive tape thickness through structured light modulation and three-dimensional height data comparison, accurately obtaining the apparent total thickness of the tape and adapting to the thickness detection needs of tape in a flat state.

The invention relates to systems and methods for improving optical signal detection. The present disclosure provides an optical signal detection system with improved spectral resolution and signal-to-noise ratio that can be used to improve semiconductor process monitoring. Improved spectral resolution may be associated with improved spectral discrimination, where an individual monitors a narrow portion of the spectral bandwidth. In one example, an optical signal detection system is provided that includes: (1) an optical interface configured to receive an optical signal; (2) a narrow band pass filter configured to transmit a portion of the received optical signal; (3) an optical etalon in series with the narrow band pass filter configured to further filter the received optical signal, where a combination of a passband of the band pass filter and a passband of the optical etalon is configured to provide an optical bandwidth of less than 1.0 nm for the optical signal; and (4) a multi-pixel optical sensor configured to substantially simultaneously collect the filtered optical signals.

The present application belongs to the technical field of guided-wave optics, and specifically relates to an angle-tunable non-polarized narrow-band optical band-pass filter. The optical filter can pass transverse electric waves and transverse magnetic waves at the same time, the passband center wavelengths of the transverse electric waves and the transverse magnetic waves monotonously and continuously change with the incident angle, and the two center wavelengths remain coincident during the tuning process; the passband full width at half maximum of the two kinds of waves has a polarization-independent narrow-band optical band-pass filtering effect; and the specific implementation comprises the following steps: a composite transparent body of a column and a planar optical waveguide; the column is cut along the longitudinal axis at a certain angle, and the planar optical waveguide is prepared on a cutting surface according to the transmission waveband; the planar optical waveguide is composed of thin films with different refractive indexes and thicknesses, and the two cutting bodies are pasted and sealed along the cutting surface to form a composite body; and wide-band antireflection films are coated on the two end surfaces of the composite body. The transmittance of the band-pass filter exceeds 99% in the tuning range, and the band-pass filter has important application value in optical communication, laser technology, precise spectroscopy and the like.

The application relates to the field of integrated optics and discloses a broadband continuously adjustable integrated optical waveguide delay line, which comprises a micro-ring structure and an N bit switch type optical delay line; wherein the micro-ring structure comprises an input straight waveguide, one adjustable coupler and one thermo-optic phase shifter; the N bit switch type optical delay line comprises an Nth optical switch, an N-1th optical switch, an N-2th optical switch, an Mth optical switch, an M-1th optical switch, an M-2th optical switch, an M-0th optical switch arranged in sequence, N delay line units arranged between the optical switches and an output straight waveguide. The broadband continuously adjustable integrated optical waveguide delay line provided by the application adopts the micro-ring structure and the N bit switch type optical delay line, realizes the performances of large optical bandwidth, low delay fluctuation, continuously adjustable delay and large delay adjustment range, solves the problems of the limitation of the bandwidth of a traditional phased array radar electric signal and beam deflection, simultaneously reduces the requirement of optical phased array radar for the stability of a working optical wavelength, and improves the beam scanning angle resolution.

The invention discloses a double-sided optical adhesive tape for a liquid crystal touch screen and a production process of the double-sided optical adhesive tape, and belongs to the technical field of optical adhesive tapes. The double-sided optical adhesive tape for the liquid crystal touch screen comprises a first adhesive layer, a weather-proof layer, a second adhesive layer and a release film layer which are sequentially bonded from bottom to top, the first adhesive layer is bonded to a cover plate of the liquid crystal touch screen, the light transmittance of the first adhesive layer and the second adhesive layer is larger than 99%, and the haze is smaller than 1%. According to the double-sided optical adhesive tape for the liquid crystal touch screen and the production process of the double-sided optical adhesive tape, disclosed by the invention, the elastomer modified asphalt prepared by a specific process is introduced into an ethylene propylene diene monomer matrix and is matched with auxiliaries such as the antioxidant and the nano titanium dioxide, so that the high-performance weather-resistant layer is constructed; through the differentiated design of the hydrotreating light-colored asphalt and the adhesive layer photoinitiator, the weather-proof layer is introduced, meanwhile, the excellent optical performance is guaranteed, and the harsh requirement of a high-end liquid crystal touch screen for display definition is completely met.

Described herein is a cover panel article for a sensor, the cover panel article comprising: a substrate; and an outer layering film disposed on the substrate. The outer layered film includes alternating high refractive index (RI) layers and low RI layers. Each of the high RI layers includes a nitride or an oxynitride. The physical thickness of the outer layered film may be from about 500 nm to 12,000 nm. The article has at least two non-overlapping wavelength bands, each band having a bandwidth of 5 nm to 200 nm and a central wavelength within a spectrum of 400 nm to 1200 nm. Further, the article exhibits: for each of the at least two non-overlapping wavelength bands, (a) within an angle of incidence of 2 gt; 70% average dual surface transmittance, and (b) tilt within an angle of incidence of 2 to 9; and the average double-surface transmittance is 50%.

According to the electro-optical modulator based on the thin-film lithium tantalate and the preparation method of the electro-optical modulator, a waveguide structure of a submicron size is designed on a thin-film lithium tantalate platform and heterogeneous integration is carried out on the waveguide structure and a gallium nitride chip, on one hand, due to the fact that an optical mode field spot of a blue-green light wave band is small, the light field spot is small; on one hand, a light field is ensured to be completely bound in the thin-film lithium tantalate waveguide for single-mode transmission, multi-mode interference is effectively avoided, on the other hand, the wide optical band gap of lithium tantalate enables blue-green light wave bands to have high transmittance, so that optical transmission loss can be reduced, the transmission distance and transmission efficiency of underwater visible light communication can be improved, and in addition, the transmission efficiency of underwater visible light communication can be improved. The efficiency of strong electro-optical interaction can also be improved by controlling the size of the electrode gap, so that high modulation efficiency can be realized under low driving voltage, and the lithium tantalate crystal has weaker optical anisotropy, so that the influence of polarization state change caused by an underwater severe environment on communication quality can be effectively inhibited, and the communication quality is improved. And the environmental adaptability and reliability of the electro-optical modulator are improved.

To provide an optical tape fiber in which the eccentricity of the optical fiber strands is suppressed. [Solution] In a method for manufacturing optical tape fiber, multiple optical fiber strands are aligned in a line in a second slit portion 42 provided in a die, and the multiple optical fiber strands are coated collectively with an ultraviolet-curable resin supplied into the die. The second slit portion 42 has a first wall surface 421 along the alignment direction A2 in which the optical fiber strands are arranged, and a second wall surface 422 facing the first wall surface 421. The first wall surface 421 is provided with a first projection 431 that protrudes toward the second wall surface 422, and the second wall surface 422 is provided with a second projection 432 that protrudes toward the first wall surface 421. The first projection 431 and the second projection 432 are provided between the passing positions of adjacent optical fiber strands in the alignment direction A2, thereby aligning the multiple optical fiber strands.