Hermetic glass-to-metal seal assembly and method of manufacturing hermetic glass-to-metal seal assembly

A sight glass assembly, comprising:

• a glass component having a first outer peripheral surface;
• an intermediate component comprising a tubular, thin-wall structure defining an opening having a first inner peripheral surface and a first portion having a first wall thickness and a second portion having a second wall thickness;
• wherein the glass component is located within the thin-wall structure of the intermediate component such that the first portion of the thin-wall structure completely surrounds the first outer peripheral surface of the glass component and engages the glass component with a compression fit;
• and
• an outer ring defining a second inner peripheral surface located around a second outer peripheral surface of the first portion of the intermediate component such that the second inner peripheral surface of the outer ring engages the second outer peripheral surface of the intermediate component with a compression fit and the first portion of the thin-wall structure of the intermediate component is plastically deformed and the first wall thickness is less than the second wall thickness;
• and
• wherein a coefficient of thermal expansion of the outer ring is greater than a coefficient of thermal expansion of the intermediate component, and the coefficient of thermal expansion of the intermediate component is greater than a coefficient of thermal expansion of the transparent component.