Camera tube with a pyro-electric target
AssigneeThomson-CSF
InventorSerge Veron
Life of this patent
Estimating the term…
Abstract
A pyroelectric radiation detector which is relatively immune to the effects of microphonic vibrations includes within an evacuated envelope a triglycine sulphate (TGS) target secured by silicone grease to a thin (3-6 .mu.M) mica support plate. The mica support plate is adhesively secured by means of an enamel to a titanium annulus which, in turn, is epoxied to the window of the evacuated envelope. The coefficients of expansion of the annulus and the support plate are selected such that after they are joined on to the other the support plate is stretched tightly across the annulus and therefore has a natural period substantially higher than the natural period of the annulus which supports it.
Claims8
A pyroelectric radiation detection device of the type that comprises an evacuated envelope having a window transparent to said radiation at one end thereof and, within said enevelope, a pyroelectric target proximate said window for receiving the radiation passing therethrough, characterized in that said device further comprises:
- an annulus having a first natural period adhesively secured to said window;
- a stretched support plate having a second natural period adhesively secured to said annulus, said first natural period being substantially greater than said second natural period and said annulus being at least two orders of magnitude thicker than said support plate;
- and
- means for securing said pyroelectric target to said support plate whereby said detection device is rendered relatively insensitive to microphonic vibration.
Dependencies are inferred from the claim text.