4results about How to "Small feature size" patented technology

The additive manufacturing method of the optical element provided in the application comprises the following steps: calculating the structure parameters of an axial gradient refractive index lens; establishing a UG three-dimensional model according to the structure parameters; adopting the forming slurry to perform light curing forming on the UG three-dimensional model; performing debinding treatment on the UG three-dimensional model after the light curing forming; performing sintering treatment on the green body after the debinding; and cleaning the sintered green body to obtain the lens with variable refractive index. The additive manufacturing method of the optical element provided in the application realizes the processing and manufacturing of the variable refractive index lens through DLP light curing 3D printing, improves the processing speed under the premise of ensuring the processing precision, and has the advantages of fast forming speed, small feature size and macro-micro cross-scale forming capability.

This invention discloses a special grating photolithography method and its resist replenishment system. Based on laser direct writing technology, this invention utilizes the characteristic that the printed grating has different resolution requirements in different dimensions. The printed structure is rotated in coordinates to ensure that the system's high-resolution projection matches the high-resolution requirements of the printed structure, achieving high-quality printing. Furthermore, to enable long-term writing and printing, this invention also provides a device for continuous resist replenishment during extended writing processes. This device can also be used for in-situ development and optical imaging.

The application is suitable for the field of modulation devices, and provides an ultrafast tunable spatial phase modulator for 6G communication and a manufacturing method. The tunable spatial phase modulator is used for receiving terahertz waves and a terahertz wave modulation device. The terahertz wave modulation device comprises a field source capable of generating an acting field acting on the tunable spatial phase modulator. The tunable spatial phase modulator comprises a seat body and a modulation part arranged on the seat body. The modulation part comprises a subwavelength structure and a modulation layer. The subwavelength structure is arranged on the seat body in a spiral pattern along a direction from close to far from the seat body. The highest height of the subwavelength structure is equal to the central wavelength of the terahertz wave. The modulation layer is arranged on the surface of the subwavelength structure far from the seat body. The modulation layer is used for receiving the terahertz wave and the acting field to modulate the phase of the terahertz wave. By adopting the subwavelength structure, the terahertz wave can be modulated in a wider range of wave bands.

The application provides an optical anti-counterfeiting element and an anti-counterfeiting product. The optical anti-counterfeiting element comprises a substrate, and a code pattern, wherein a part of a side surface of the substrate is provided with the code pattern, the code pattern reproduces preset information through decoding, the code pattern comprises a first part and a second part, the first part and the second part are arranged in mutual embedding, the first part is transparent, and at least a local characteristic size of the first part is not greater than 5 microns, the second part comprises an optical microstructure and a plating layer covering the optical microstructure on a side surface away from the substrate, when a light beam is incident on the first part and the second part, the second part provides a line optical anti-counterfeiting feature in a reflection light direction and near the reflection light direction visible to a human eye, the first part generates a transmission light field, and the transmission light field reproduces the preset information. The application solves the problem that the optical anti-counterfeiting element in the prior art is difficult to simultaneously consider concealment and security.