초록 ▼

A Raman head is provided capable of operating at high surrounding pressures. The Raman head has housing having a first, sealed chamber filled with an incompressible liquid and a second chamber that is open to the surrounding environment. At least one bellows can be used to equalize pressure between

A Raman head is provided capable of operating at high surrounding pressures. The Raman head has housing having a first, sealed chamber filled with an incompressible liquid and a second chamber that is open to the surrounding environment. At least one bellows can be used to equalize pressure between the first sealed chamber and the surrounding environment. A planar side of a pair of plano-concave lens is positioned within the first chamber and the concave side of each plano-concave lens is positioned within the second chamber of the Raman head. Light emitted as a result of a laser beam in communication with the pair of plano-concave lens can be analyzed by a Raman analyzer.

대표청구항 ▼

1. A Raman head comprising: a first, sealed chamber filled with a liquid medium;a second chamber open to the surrounding environment, wherein the first and second chambers are separated by a window;a multi-pass Raman cell comprising a pair of plano-concave lenses, wherein the planar side of each pla

1. A Raman head comprising: a first, sealed chamber filled with a liquid medium;a second chamber open to the surrounding environment, wherein the first and second chambers are separated by a window;a multi-pass Raman cell comprising a pair of plano-concave lenses, wherein the planar side of each plano-concave lens is positioned within the first chamber, and the concave side of each plano-concave lens is positioned within the second chamber, and wherein the plano-concave lenses act as spherical mirrors; andat least one bellows configured to equalize the pressure in the first sealed chamber and the surrounding environment. 2. The Raman head of claim 1, further comprising an achromatic lens in the first chamber and an adjusting unit configured to position the lens in a desired location. 3. The Raman head of claim 1, further comprising a minor positioned in the first chamber and configured to reflect a laser beam from the first chamber through the window into the Raman cell. 4. The Raman head of claim 1, wherein the at least one bellows comprises a plurality of bellows. 5. The Raman head of claim 1, wherein the at least one bellows comprises at least one stainless steel bellows. 6. The Raman head of claim 1, wherein the window is a sapphire window. 7. The Raman head of claim 1, wherein the liquid medium comprises distilled water.