Patent ID: 6903329

Claim:
An optical system for a gas component analysis, comprising: a first emitter for emitting a first light beam having a first spectrum; a second emitter for emitting a second light beam at a second spectrum; a first receiver for receiving the first light beam; and a second receiver for receiving the second light beam, wherein the first light beam travels along a first path in a first direction and the second light beam travels along a second path in a second direction and at least a portion of the first light path overlaps with at least a portion of the second light path to form an overlapping beam, and at the overlapping beam the first direction is opposite to the second direction; wherein the first and second light beams are projected across a vehicle path, and the first and second emitters and first and second receivers are located on one side of the vehicle path, and wherein the system comprises a reflector located at the other side of the vehicle path to direct the first and second beams from the first and second emitters to the first and second receivers respectively, wherein one of the first and second receivers is mounted by a bisected mounting, comprising: a baseplate; an insulating member attached to said baseplate; and a detector side attached to said insulating member, wherein said insulating member thermally isolates said baseplate from said detector side.