Optical cell measurement apparatus

Details Optical cell measurement apparatus Optical cell measurement apparatus

2007-07-31

2007-07-31

Lauchman, Layla G. (Department: 2877)

Optics: measuring and testing

For light transmission or absorption

Of fluent material

C356S246000

Reexamination Certificate

active

11134296

ABSTRACT:
An inventive optical cell measurement apparatus comprises a light source (S) which emits light having a predetermined wavelength range, a first mirror (M1) which reflects the light emitted from the light source (S), a long light path gas cell (1) to which the light reflected on the first mirror (M1) is introduced, a second mirror (M2) which reflects light outputted from the long light path gas cell (1), a sensor (D) which detects the light reflected on the second mirror (M2), and optical elements (21, 22) disposed in a light path extending from the light source (S) to the sensor (D) and each having a bifocal property with different focal lengths as measured in two directions (X, Y) perpendicular to the light path. With this arrangement, the aberration of spherical mirrors (6, 7) disposed in the gas cell (1) is corrected, thereby preventing reduction of the transmittance of the gas cell (1).

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