3results about How to "No dispersion" patented technology

The invention discloses a diffraction optical waveguide and an AR (Augmented Reality) display device, and relates to the technical field of AR display, the waveguide is characterized in that a single-layer waveguide structure is matched with an innovative layout of a double-sided diffraction region, a first surface is provided with a first diffraction region, a second diffraction region and a third diffraction region, and a second surface is provided with a fourth diffraction region, a fifth diffraction region and a sixth diffraction region; wherein the first diffraction area is responsible for coupling blue light and green light, the fourth diffraction area is responsible for coupling red light, and the double-coupling design effectively improves the coupling efficiency and uniformity of light with different wavelengths. Wherein the second diffraction region and the fifth diffraction region are mutually expanding and coupling-out regions, the occupied area of the structure is greatly reduced, the waveguide sheet is compact, light and thin, meanwhile, the third diffraction region and the sixth diffraction region serve as recycling regions, residual light energy can be recycled, and the overall light efficiency is remarkably improved. And through optimization of the grating direction, vector closing of light with different wavelengths in the waveguide is ensured, no dispersion is generated, and thus high uniformity and coincidence of image colors are ensured.

The invention relates to a phosphogypsum modified material for a highway under a new excitation system and a preparation method and device thereof, and belongs to the technical field of highway engineering in traffic transportation engineering. The modified material comprises the following raw materials in percentage by weight: 80-90% of phosphogypsum and 10-20% of a modifier, totaling 100%, the mass of the water is 15%-18% of the total mass of the phosphogypsum and the exciting agent; the modifier comprises the following raw materials: calcium oxide, silicon dioxide, ferric oxide, aluminum oxide, mineral powder, tricalcium silicate, calcium carbonate, sodium silicate, a coupling agent, iron powder and rubber powder. The ardealite modified material has the advantages of excellent strength increase and stability improvement in the aspect of long-term performance development, is high in environmental protection property, free of pollution to the environment, soil and water, good in economical efficiency and easy to popularize and apply, and does not increase the comprehensive construction cost of a project.

The utility model relates to multi-slit push-scan type hyperspectral imaging system, including front objective lens, multi-slit element, spectrometer imaging subassembly and panchromatic focal plane detector, multi-slit element sets up in the imaging light path of front objective lens, multi-slit element includes rectangular window and multiple parallelly arranged slits, and the rectangular window department sets up filter, spectrometer imaging subassembly respectively receives the light that transmits from rectangular window and slit and handles after, focuses to panchromatic focal plane detector again, panchromatic focal plane detector gathers the light after spectrometer imaging subassembly processing, forms spatial image and spectral data, realizes the errorless splicing and fusion of spectral image according to the position and attitude change in spatial image continuous two frames, obtains the spectral image of high spatial resolution, high spectral resolution. The utility model front lens, the joint design of multi-slit element and spectrometer imaging subassembly obtains the optical system that spectrometer imaging performance is excellent, and the volume is small, and the signal-to-noise ratio is high, and the image acquisition rate is high.