Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
42 words
An infra-red detector comprising a pyroelectric device (10) characterised in that the device (10) is mounted on a rigid structure (12, 14 and 20), said rigid structure including a block of material (20) which is substantially stiffer than the pyroelectric device (10).
Claim 2
Dependent Claim
42 words
An infra-red detector comprising a pyroelectric device (10) characterised in that the device (10) is mounted on a rigid structure (12, 14 and 20), said rigid structure including a block of material (20) which is substantially stiffer than the pyroelectric device (10).
Claim 3
Dependent Claim
20 words
A detector, as claimed in claim 1, wherein the block of material (20) is in the form of a cylinder.
Claim 4
Dependent Claim
28 words
A detector, as claimed in claim 2, wherein said cylinder (20) has an aspect ratio - ie. the ratio of thickness to radius - of at least one.
Claim 5
Dependent Claim
20 words
A detector, as claimed in claim l, wherein the block of material (20) is in the form of a cuboid.
Claim 6
Dependent Claim
29 words
5 * A detector, as claimed in claim 4, wherein said cuboid (20) has an aspect ratio - ie. the ratio of thickness to half-width of at least one.
Claim 7
Dependent Claim
24 words
A detector, as claimed in one of the preceding claims wherein the material of the block (20) is a ceramic of high specific stiffness.
Claim 8
Dependent Claim
15 words
A detector, as claimed in claim 6, wherein said ceramic (20) is of alumina ceramic.
Claim 9
Dependent Claim
16 words
A detector, as claimed in claim 6, wherein said ceramic (20) is of silicon carbide ceramic.
Claim 10
Dependent Claim
16 words
A detector, as claimed in claim 6, wherein said ceramic (20) is of silicon nitride ceramic.
Claim 11
Dependent Claim
32 words
A detector, as claimed in any of one of the preceding claims, wherein the device (10), together with a non-absorbing compensation element (10) adjacent thereto are mounted upon a common block (20).
Claim 12
Dependent Claim
61 words
A detector, as claimed in any one of the preceding claims, wherein said rigid structure (12, 14 and 20) includes a substrate (12) and package structure (14) between the device (10) and the block (20), bonding being provided between each (10 and 12, 12 and 14, 14 and 20), said bonding being both uniform over the area of contact and stiff.