Patent Number: 039492311
Section: claims

1. An infrared radiating unit for infrared analyzers, comprising a cylindrically shaped source of infrared radiation; and a reflector partly surrounding said source and comprising a curved reflector section having a reflecting surface shaped to resemble an axially bisected rotationally symmetrical paraboloid, and a cylindrical reflector section extending from an open side of said curved reflector section, the focal points of the reflecting surface being located on a circle which coincides with the outer circumference of said cylindrically shaped source. 2. A unit as defined in claim 1, wherein said source is of hollow cylindrical configuration. 3. A unit as defined in claim 2, wherein said reflector is of rust-resistant steel. 4. A unit as defined in claim 2, wherein said reflector is of a material having a low coefficient of thermal conductivity. 5. A unit as defined in claim 2, wherein at least said reflecting surface is gold-plated. 6. A unit as defined in claim 2; further comprising a mount for said reflector, said mount engaging said reflector in a manner to reduce the conduction of thermal energy between them. 7. A unit as defined in claim 6; further comprising a carrier of ceramic material for said source; and wherein said source is a coil of resistance wire. 8. A unit as defined in claim 7, said carrier having a first portion outside said reflector, and a second reduced-diameter portion extending into said reflector and carrying said coil. 9. A unit as defined in claim 7; and further comprising clamping means replaceably clamping said carrier to said mount for axial and angular adjustment. 10. A unit as defined in claim 2; further comprising a carrier having at least a portion located within said reflector; said source comprising a metallic sleeve mounted on said portion and having axially spaced flanges, and a heating coil surrounding said sleeve intermediate said flanges. 11. A unit as defined in claim 10, wherein said sleeve is of rust-resistant steel.