光阴极必须有一个窗口,让入射光透过它,然后投射到光阴极表面上;此外,由于光阴极很薄(厚度约几百埃到一千多埃),不能自支持,因此,必须有一个支持它的基底。在反射式光阴极的器件内,光阴极的窗口与基底是分开的;而在透射式光阴极的器件内,光阴极的窗口同时也是光阴极的基底。 光阴极的窗口(基底)材料通常都采用玻璃(包括普通玻璃,透紫外玻璃,纤维光学玻 The photocathode must have a window through which incident light can pass and then be projected onto the photocathode surface. In addition, since the photocathode is very thin (a few hundred angstroms to over a thousand angstroms in thickness) and can not be self-supporting, A base that supports it. In reflective photocathode devices, the photocathode’s window is separate from the substrate; in transmissive photocathode devices, the photocathode’s window is also the photocathode’s substrate. Photocathode window (base) materials are usually used glass (including ordinary glass, through UV glass, fiber optical glass