5results about How to "Avoid shadow effect" patented technology

The application provides a manufacturing method of a three-dimensional braided preform with low fiber volume content, which comprises the following steps: selecting fibers, braiding the fibers to form a first three-dimensional braided bundle, and the fiber volume content in the first three-dimensional braided bundle is 40%-60%; braiding the first three-dimensional braided bundle again to form a second three-dimensional braided preform, and the fiber volume content in the second three-dimensional braided preform is 20-35%. The three-dimensional braided bundle with the same thickness is used to replace the fiber bundle composed of single filaments, so that the size and distribution of the gap in the preform are more uniform, which is beneficial to the densification of the subsequent curing process, reduces the porosity, and improves certain structure and physical and chemical performance indexes.

The invention relates to the technical field of meteorological ecological observation, biological safety detection, environment monitoring and the like, and discloses a biological aerosol automatic identification system and method based on ultraviolet fluorescence imaging, and the system comprises an environment control module, an aerosol sampling module, an adhesive tape transmission module, an ultraviolet microscopic imaging module and a control and data processing module. The environment control module is used for constructing a constant-temperature closed optical darkroom; the aerosol sampling module captures biological particles in the air on the surface of a carrier adhesive tape by utilizing an acceleration nozzle and an inertial impact principle; the adhesive tape transmission module realizes automatic transfer of a sample from a sampling position to a detection position through stepping control; the ultraviolet microscopic imaging module adopts a coaxial incident light path structure and is matched with a dichroic spectroscope and an optical filter to separate exciting light and fluorescence signals. According to the invention, full-process automatic in-situ monitoring of the biological aerosol is realized, the problem of background interference is effectively solved, and the real-time performance of detection and the recognition accuracy are improved.

A system and method for fixing an optical component for applying treatments and deposits on at least one surface of the component without producing sparse areas on the surface. The system comprises an optical component holder in the form of a flange (10), the flange being provided with two branches (11a, 11b), the two branches being connected at a first of their ends by a spring link (12) and being provided at a second of their ends with facing tabs (15a, 15b) and means (13, 14) for bringing the tabs together, the means for bringing the tabs together being suitable for fastening the branches to an edge (2) of the component (1). The method comprises the steps of positioning the optical component holder in the form of a flange around the edge (2) of the optical component, and fastening the flange to the edge of the optical component, wherein the front surface (16) of the flange is positioned so as to be recessed from or flush with the surface to be treated.

The invention relates to the technical field of part measurement, and discloses a mechanical part light source detection device which comprises a fixed table, a support and a camera module, the support is fixedly arranged on the fixed table, the camera module is assembled at the top end of the support, a mounting plate is coaxially and fixedly assembled on the camera module, and an annular lamp strip is coaxially and fixedly mounted on the mounting plate. A light gathering cover is arranged below the lamp strip, a sealed liquid cavity filled with light-transmitting liquid is formed in the light gathering cover, air cavities are formed in the upper portion and the lower portion of the liquid cavity, flexible and transparent diaphragms are arranged between the air cavities and the liquid cavity, and a plurality of air pressure pipes for controlling air pressure in the air cavities are installed on the air cavities. The irradiation range of the light source of the lamp strip is changed by adjusting the pressure difference between the air cavity and the liquid cavity, when the light source is insufficient, the pressure of the air cavity is increased to form a biconcave lens, light rays are diverged, and the irradiation range is expanded; when the light source is too large or insufficient in brightness, the pressure of the air cavity is reduced to form a biconvex lens, light is focused, and the illumination intensity and resolution are enhanced.

This invention relates to the field of vacuum coating technology, specifically to a band saw blade coating device and its coating process. The device includes a vacuum coating chamber, a drive mechanism with its output end located within the vacuum coating chamber, and several linkage mechanisms. A support frame, connected to the drive mechanism, is installed within the vacuum coating chamber. The support frame includes a rotatable central column. Each linkage mechanism includes a horizontal shaft rotatably connected to the central column. An inclined shaft, forming an angle with the horizontal shaft's length direction, is mounted on the inclined shaft. A rotating bearing is sleeved on the inclined shaft, and a clamping mechanism for holding the band saw blade roll is sleeved on the rotating bearing. Within the vacuum coating chamber, the band saw blade roll can not only revolve but also change its lateral and vertical angles, allowing the saw teeth to face the target material at more angles. This effectively overcomes the shadow effect caused by the existing technology's limited revolving and rotating capabilities, which results in coating blind spots and uneven film thickness on the saw tooth side. This improves the coating uniformity of all parts of the saw tooth side, especially the front tooth side.