Astigmatic Multipass Absorption Cells
Light-weight Astigmatic Multipass Absorption Cell – AMAC-36LW
A new lightweight (1.25 kg) 36 meter (0.3 liter volume) Astigmatic Multipass Absorption Cell, the AMAC-36LW uses the same high-efficiency multipass optical design as our AMAC-36, but with less than half the mass. A similar lightweight cell is also available with 76 meter path length, 0.5 liter volume, the AMAC-76LW.
Specifications
| AMAC-36 | AMAC-76 | |
| Path length | 36 (18) m | 76 (55) |
| Base path | 0.20 m | 0.32 m |
| Number of passes | 182 (90) | 238 (174) |
| Volume | 0.3 liters | 0.5 liters |
| Mirror diameter | 3.8 cm | 3.8 cm |
| Optical axis height | 6.4 cm | 6.4 cm |
| In-out half-angle | 5.1 degrees | 3.2 degrees |
| Input hole diameter | 4.3 mm | 4.3 mm |
| Dimensions exterior | ||
| Length Width Weight | 30 cm 7.6 cm 4.1 kg | 42 cm 7.6 cm 4.4 kg |
| Optical Design | Astigmatic two-mirror system with central coupling hole. | |
| Mirrors | Nickel plated aluminum with broad-band dielectric coating. | |
| Wavelength range | 3 to 11 µm (actual range may be broader). | |
| Reflectivity | 99.2 % | |
| Window material | BaF2 | |
| Body materials | Nickel plated aluminum, stainless steel end flanges, Pyrex tube. |
References
Dual quantum cascade laser trace gas instrument with astigmatic Herriott cell at high pass number, J. B. McManus, M S. Zahniser, D. D. Nelson, Appl. Opt., 50, A74-A85, 2011.
Application of quantum cascade lasers to high-precision atmospheric trace gas measurements, J. B. McManus, M. S. Zahniser, D. D. Nelson, Jr., J. H. Shorter, S. Herndon, E. Wood, R. Wehr, Opt. Eng. 49, 111124, 2010.
Paraxial Matrix Description of Astigmatic and Cylindrical Mirror Resonators with Twisted Axes for Laser Spectroscopy, B. McManus, App. Optics, 46, 472-482, (2007).
Astigmatic mirror multipass absorption cells for long-path-length spectroscopy, J.B. McManus, P.L. Kebabian, and M.S. Zahniser, Applied Optics, 34, 3336-3348 (1995).
Light-weight Astigmatic Multipass Absorption Cell – AMAC-36LW
A new lightweight (1.25 kg) 36 meter (0.3 liter volume) Astigmatic Multipass Absorption Cell, the AMAC-36LW uses the same high-efficiency multipass optical design as our AMAC-36, but with less than half the mass. A similar lightweight cell is also available with 76 meter path length, 0.5 liter volume, the AMAC-76LW.
Specifications
| AMAC-36 | AMAC-76 | |
| Path length | 36 (18) m | 76 (55) |
| Base path | 0.20 m | 0.32 m |
| Number of passes | 182 (90) | 238 (174) |
| Volume | 0.3 liters | 0.5 liters |
| Mirror diameter | 3.8 cm | 3.8 cm |
| Optical axis height | 6.4 cm | 6.4 cm |
| In-out half-angle | 5.1 degrees | 3.2 degrees |
| Input hole diameter | 4.3 mm | 4.3 mm |
| Dimensions exterior | ||
| Length Width Weight | 30 cm 7.6 cm 4.1 kg | 42 cm 7.6 cm 4.4 kg |
| Optical Design | Astigmatic two-mirror system with central coupling hole. | |
| Mirrors | Nickel plated aluminum with broad-band dielectric coating. | |
| Wavelength range | 3 to 11 µm (actual range may be broader). | |
| Reflectivity | 99.2 % | |
| Window material | BaF2 | |
| Body materials | Nickel plated aluminum, stainless steel end flanges, Pyrex tube. |
References
Dual quantum cascade laser trace gas instrument with astigmatic Herriott cell at high pass number, J. B. McManus, M S. Zahniser, D. D. Nelson, Appl. Opt., 50, A74-A85, 2011.
Application of quantum cascade lasers to high-precision atmospheric trace gas measurements, J. B. McManus, M. S. Zahniser, D. D. Nelson, Jr., J. H. Shorter, S. Herndon, E. Wood, R. Wehr, Opt. Eng. 49, 111124, 2010.
Paraxial Matrix Description of Astigmatic and Cylindrical Mirror Resonators with Twisted Axes for Laser Spectroscopy, B. McManus, App. Optics, 46, 472-482, (2007).
Astigmatic mirror multipass absorption cells for long-path-length spectroscopy, J.B. McManus, P.L. Kebabian, and M.S. Zahniser, Applied Optics, 34, 3336-3348 (1995).
Measurement of Trace Gas Fluxes Using Tunable Diode Laser Spectroscopy, M.S. Zahniser, D.D. Nelson, J.B. McManus and P.L. Kebabian. Phil. Trans. Roy. Soc. Lond. A., 351, 371-382 (1995).
