Abstract: A receiver optical subassembly includes an optical receiving housing, and a first optical receiver, a second optical receiver, and a first glass are packaged in the optical receiving housing. The first glass is disposed obliquely relative to an optical receiving direction, and includes a light incident surface and a light emergent surface. The first optical receiver and the second optical receiver are opposite to the light emergent surface of the first glass. A first light splitting film is disposed on the light emergent surface of the first glass. A first reflective film is disposed on the light emergent surface of the first glass. The first light splitting film can transmit an optical signal of a first wavelength and reflect an optical signal of a second wavelength.

Abstract: The present application relates to a high-elastic viscous weft-knitted fabric and its preparation method and application. The preparation method includes the steps of weft-knitting low-temperature spandex filament and nylon to form a stitch structure having a needle-containing double-sided stitch, an upper single-sided stitch and a lower single-sided stitch, and weaving in cycles to form the high-elastic viscous weft-knitted fabric. The quality content of spandex in the high-elastic viscous weft-knitted fabric is greater than 50%. The present application provides a high-elastic viscous weft-knitted fabric obtained from the above-mention preparation method. The present application also provides a lady brassiere inner lining made of the above-mentioned high-elastic viscous weft-knitted fabric. The high-elastic viscous weft-knitted fabric of the present application is a double-sided weft-knitted fabric with nylon on one side and spandex on the other side.

Abstract: The present invention provides a fully spandex weft-knitted cloth and a production method thereof and a kind of lingerie lining. The production method includes the following steps: weft knitting 40 D and/or 70 D spandex filaments on a double circular knitting machine, the method of weft-knitting includes tuck weaving the spandex filaments with the needle of the upper needle dial and the lower needle dial simultaneously, forming double-sided needle-containing stitches, needle weaving the spandex filaments with the needle of the upper needle dial while without the needle of the lower needle dial, and forming upper single-sided stitches; and needle weaving the spandex filaments with the needle of the lower needle dial while without the needle of the upper needle dial, forming lower single-sided stitches, and completing a weaving cycle, after one or a plurality of weaving cycles, the fully spandex weft-knitted cloth is obtained.