44 results about "Test double" patented technology

The invention provides a method for testing pump absorption coefficients of a double-coated gain fiber. The method comprises the following steps: (S1) welding an LD pump light source tail fiber with a fiber combiner pump tail fiber by virtue of a hectowatt-order LD pump light source needing to be subjected to wavelength testing, coupling pump light into high reflection grating by virtue of a fiber combiner, outputting the pump light from a high reflection grating tail fiber, and recording an output power value as pump coupling power; (S2) selecting a to-be-tested double-coated gain fiber with an initial length L0 less than or equal to 40m, and building a hectowatt-order vibration structure fiber laser device; (S3) recording power values of a fiber output end by virtue of a truncation method when the lengths of the to-be-tested fiber are L0, L1......LN and power values of an input end when a 45-degree dichroic mirror is inserted into the input end, so as to obtain corresponding surplus pump light power under each fiber length; and (S4) carrying out calculation and statistics so as to obtain the pump absorption coefficients of the double-coated gain fiber. According to the method, the influence caused by ASE upon a testing result can be omitted, a testing platform is stable and safe, and the accurate measurement of the pump absorption coefficients of a double-coated gain fiber is realized.

The invention discloses a component for testing double-faced chip photoelectric properties, comprising a to-be tested double-faced chip; one side of the double-faced chip is equipped with photic position; another side is equipped with pins. Said component also comprises a glass substrate and a printing circuit board. Said printing circuit board is equipped with through holes. The photic side of said to-be tested double-faced chip is fixedly connected to the glass substrate. The glass substrate is fixedly connected to the printing circuit board; said printing circuit board is equipped with theleading circuits. Each leading circuit is respectively equipped with testing electrodes. Each electrode of said to-be tested double-faced chip is respectively connected to corresponding transition circuits via golden line; each transition circuit is respectively connected to corresponding leading circuit via golden line. This invention also discloses a method for using the component to test double-faced chip photoelectric properties; said component not only can achieve photoelectric properties test of the double-faced chip, but also it endures accuracy and repeatability of the test.

The invention relates to a double-membrane filtration method for microbial inspection of pharmaceuticals. Two-layer filter membranes are used. The pore size of the first filter membrane can be 5 μm-10 μm, 10 μm-20 μm, 20 μm-30 μm, and 30 μm-50 μm. Insoluble substances such as macromolecular matrix, particles, fibers, and drug residues; the pore size of the second filter membrane is not greater than 0.45 μm, which is used to retain microorganisms. The method of the invention can effectively prevent the clogging of the filter membrane, is beneficial to eliminate the antibacterial activity of the test product, and avoids the damage of the polluting microorganisms in the test product. The method of the present invention can be used to test the medicines that cannot be effectively tested by the current method. It is proved by a large number of test data that the method is simple and feasible, and the result is effective.