Retro-reflector assembly and opacity monitor incorporating same
First Claim
1. A retro-reflector assembly for incorporation in an opacity monitor, said assembly comprising several corner-cube prisms each of which is of glass and each of which has a cylindrical external surface by which said prisms are embedded in closely spaced relationship in a metal substrate, which metal substrate either imparts, by its high thermal conductivity, compared with the thermal conductivity of said glass prisms, thermal stability to said assembly, and/or which metal substrate is thermally controlled to attain thermal stability.
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Accused Products
Abstract
A retro-reflector assembly (1) for incorporating in an opacity monitor, includes several small corner-cube prisms (2) of cylindrical section. The invention also includes an opacity monitor incorporating a retro-reflector assembly as defined above.
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Citations
10 Claims
- 1. A retro-reflector assembly for incorporation in an opacity monitor, said assembly comprising several corner-cube prisms each of which is of glass and each of which has a cylindrical external surface by which said prisms are embedded in closely spaced relationship in a metal substrate, which metal substrate either imparts, by its high thermal conductivity, compared with the thermal conductivity of said glass prisms, thermal stability to said assembly, and/or which metal substrate is thermally controlled to attain thermal stability.
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10. An opacity monitor incorporating a retro-reflector assembly, said assembly comprising several corner-cube prisms each of which is of glass and each of which has a cylindrical external surface by which said prisms are embedded in closely spaced relationship in a metal substrate, which metal substrate either imparts, by its high thermal conductivity, compared with the thermal conductivity of said glass prisms, thermal stability to said assembly, and/or which metal substrate is thermally controlled to attain thermal stability.
Specification