Laser sample observation window capable of replacing window glass

Abstract

The invention discloses a laser sample observation window capable of replacing window glass. The laser sample observation window comprises flanges and light-transmitting crystal wafers; and a Pb-Ag-Sn alloy is adopted as a sealing ring for sealing between the light-transmitting crystal wafers and the flanges. According to the laser sample observation window disclosed by the invention, lead alloy sealing and internally-welded short pipe flanges are adopted, so that influences caused by expansion coefficient difference between crystal and stainless steel as well as uneven stress are effectively reduced, and the micro-leakage is solved; the laser sample observation window has the characteristics of excellent sealing property, capability of keeping ultrahigh vacuum state for a long time, good system background, high-temperature roasting resistance of 250 DEG C, good light transmittance, wideness in applicable wavelength range, long service life, simpleness for processing and low cost; moreover, a reliable device for heating samples by using infrared laser under the ultrahigh vacuum condition is provided.

Description

technical field [0001] The present invention relates to a method for CO 2 The invention relates to an ultra-high vacuum laser sample observation window for a laser, in particular to a laser sample observation window with replaceable window glass. Background technique [0002] In mass spectrometry systems that use lasers for melting samples, it is often necessary to equip ultra-high vacuum laser sample windows, and often need to be equipped with ultra-high vacuum sample windows, so that the laser can be focused through the sample window to On the surface of the sample, the gas released after the sample is melted is analyzed by a mass spectrometer. [0003] The ultra-high vacuum laser sample window is generally composed of a stainless steel flange and a light-transmitting crystal, and the light-transmitting crystal is generally welded on the metal flange. There are three main performance indicators: light transmittance, background level and stability, which respectively repr...

AI Technical Summary

Problems solved by technology

Part of the light-transmitting crystal is difficult to weld with the metal flange due to the material, expansion coefficient, etc., resulting in micro-leakage, and the system has a high background level and cannot be used for high-precision analysis.

Using high-temperature-resistant vacuum resin to fix the crystal and stainless steel will cause micro-cracking of the resin after high-temperature baking and aging, resulting in micro-leakage, resulting in an increase in the background, and a shorter service life.

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