US4180759A — Thermal camera tubes

Claim 1

Independent Claim 96 words

A pyroelectric target plate for a thermal camera tube comprising, in combination: a supporting layer of low thermal conductivity; and an array of pyroelectric target elements on one surface of said supporting layer, said elements being disposed in regularly spaced relation in a plurality of columns and a plurality of rows thereof whereby to define channels between the elements, at least a majority of said elements completely overhanging channels adjacent thereto, thereby tending to restore the reduction in responsivity which would otherwise be experienced by virtue of there being no pyroelectric material within the channels themselves.

Claim 2

Dependent Claim 96 words

A pyroelectric target plate for a thermal camera tube comprising, in combination: a supporting layer of low thermal conductivity; and an array of pyroelectric target elements on one surface of said supporting layer, said elements being disposed in regularly spaced relation in a plurality of columns and a plurality of rows thereof whereby to define channels between the elements, at least a majority of said elements completely overhanging channels adjacent thereto, thereby tending to restore the reduction in responsivity which would otherwise be experienced by virtue of there being no pyroelectric material within the channels themselves.

Claim 3

Dependent Claim 38 words

A target plate as defined in claim 1 wherein said supporting layer comprises a polymer film which is electrically non-conductive and an electrically conductive signal plate on said film which constitutes said one surface of the supporting layer.

Claim 4

Dependent Claim 58 words

A thermal camera tube having a reticulated pyroelectric target and wherein separate pyroelectric elements of said target overhang channels separating it from adjacent pyroelectric elements whereby the overhanging surfaces of said element are exposed to radiation incident in the region of said channels, every channel between the separate elements being overlapped completely by overhanging surfaces of said element.

Claim 5

Dependent Claim 58 words

A thermal camera tube having a reticulated pyroelectric target and wherein separate pyroelectric elements of said target overhang channels separating it from adjacent pyroelectric elements whereby the overhanging surfaces of said element are exposed to radiation incident in the region of said channels, every channel between the separate elements being overlapped completely by overhanging surfaces of said element.

Claim 6

Dependent Claim 118 words

A thermal camera tube having a reticulated pyroelectric target and wherein one or more of the separate pyroelectric elements of said target overhang channels separating it from adjacent pyroelectric elements whereby the overhanging surfaces of said element are exposed to radiation incident in the region of said channels, the separate elements being arranged in rows and columns and each element having the shape of a cube the vertical sides of which are inclined so that, except for those in one outer column and one outer row, on two of its sides the top of each element overhangs the base of an adjacent element in the same row and the base of an adjacent element in the same column.

Claim 7

Dependent Claim 118 words

A thermal camera tube having a reticulated pyroelectric target and wherein one or more of the separate pyroelectric elements of said target overhang channels separating it from adjacent pyroelectric elements whereby the overhanging surfaces of said element are exposed to radiation incident in the region of said channels, the separate elements being arranged in rows and columns and each element having the shape of a cube the vertical sides of which are inclined so that, except for those in one outer column and one outer row, on two of its sides the top of each element overhangs the base of an adjacent element in the same row and the base of an adjacent element in the same column.

Claim 8

Dependent Claim 54 words

A tube as claimed in claim 4 and wherein the ratio of the depth of each element to the width of each of the channels separating the rows and columns is four to one and the angle of inclination is 20° to the normal from the surface of a supporting layer carrying said elements.

Claim 9

Dependent Claim 18 words

A tube as claimed in claim 5 and wherein said supporting layer is comprised of a polymer film.

Claim 10

Dependent Claim 27 words

A tube as claimed in claim 6 and wherein said polymer film is electrically non-conductive and is an electrical conductive signal plate applied thereto constituting said surface.

Claim 11

Dependent Claim 27 words

A tube as claimed in claim 5 wherein said layer comprises a polymer film which is itself electrically conductive and constitutes said surface of the supporting layer.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1982-12-24	1983-06-25	1983-12-25	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1986-12-24	1987-06-25	1987-12-25	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1990-12-24	1991-06-25	1991-12-25	$7700.00	Window Closed / Lapsed

Thermal camera tubes

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