Aerodyne Research

Long path length - low volume fast response absorption cell for tunable laser spectroscopy and atmospheric trace gas detection

	AMAC-100	AMAC-200	AMAC-36	AMAC-76
Path length	100 (49) m	210 (153, 295) m	36 (18) m	76 (55)
Base path	0.55 m	0.88 m	0.20 m	0.32 m
Number of passes	182 (90)	238 (174, 334)	182 (90)	238 (174)
Volume	3.2 liters	5.1 liters	0.3 liters	0.5 liters
Mirror diameter	7.6 cm	7.6 cm	3.8 cm	3.8 cm
Optical axis height	8.9 cm	8.9 cm	6.4 cm	6.4 cm
In-out half-angle	3.7 degrees	2.5 degrees	5.1 degrees	3.2 degrees
Input hole diameter	5.3 mm	5.3 mm	4.3 mm	4.3 mm
Dimensions exterior Length Width Weight	70 cm 13.4 cm 18 kg	104 cm 13.4 cm 21 kg	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.

*Now available: New Lightweight Astigmatic Multipass Absorption Cell

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