Patent ID: 11913834
Assignee: ENDRESS+HAUSER OPTICAL ANALYSIS, INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An optical analysis apparatus, comprising:
a first optical fiber configured to convey light from a light source;
a second optical fiber configured to convey light to a detector; and
a probe configured to capture a spectral response through an intervening material that emits unwanted background radiation when irradiated, the probe comprising:
a first lens configured to receive light from the first optical fiber and collimate the light into a collimated excitation beam defining a first aperture;
an objective element adapted to focus the collimated excitation beam to a point or region in a sample through the intervening material, wherein the objective element is further adapted to receive light scattered by the sample and the intervening material and to collimate the scattered light into a collimated collection beam defining a second aperture;
an optical element disposed in the collimated collection beam, wherein the optical element is adapted to redirect the collimated excitation beam to the objective element;
a blocking element disposed within the collimated collection beam and configured to block at least a portion of the light scattered by the intervening material from the collimated collection beam, wherein the blocking element is a bandpass filter disposed in the collimated excitation beam between the optical element and the objective element,
wherein the second aperture defined by the collimated collection beam is at least two times greater than the first aperture defined by the collimated excitation beam; and

a second lens configured to focus the collimated collection beam onto the second optical fiber as to convey the collimated collection beam onto a detector.