Optical chamber base with integrated reflective surfaces for particle detection

1 . A unitary reflective component insert, comprising:

a first end including two ellipsoidal emitter mirrors shaped to direct light emitted from emitters positioned below the emitter mirrors toward a scattering zone of an optical chamber;

a second end including a receiver mirror within a receiver cavity;

side walls extending between the first end and the second end; and

a barrier positioned at an entrance to the receiver cavity, extending across the insert, and terminating at each of the side walls.

2 . The unitary reflective component insert of claim 1 , wherein the receiver mirror is shaped to direct light scattered by smoke particulate in the scattering zone of the optical chamber toward a receiver positioned below the receiver mirror.

3 . An optical chamber base, comprising:

a chamber base body having a cavity formed therein; and

a unitary reflective component insert positioned in the cavity, wherein the unitary reflective component insert includes:

first end including two ellipsoidal emitter mirrors shaped to direct light emitted from emitters positioned below the emitter mirrors toward a scattering zone of an optical chamber;

a second end including a receiver mirror within a receiver cavity;

side walls extending between the first end and the second end; and

a barrier positioned at an entrance to the receiver cavity, extending across the insert, and terminating at each of the side walls.

4 . The optical chamber base of claim 3 , wherein the unitary reflective component insert includes a number of alignment teeth that mate with a corresponding number of recesses formed on the chamber base body.

5 . The optical chamber base of claim 3 , wherein the side walls mate with a corresponding number of side walls formed on the chamber base body.

6 . The optical chamber base of claim 5 , wherein the unitary reflective component insert includes a number of alignment teeth that mate with a corresponding number of recesses formed on the chamber base body.

7 . The optical chamber base of claim 3 , wherein the unitary reflective component insert includes a portion of an inside perimeter surface that mates with a corresponding portion of an outer perimeter surface of a block formed within the cavity of the chamber base body.

8 . The optical chamber base of claim 3 , wherein the unitary reflective component insert includes a first outer end surface that has a shape that is different than a shape of a second outer end surface.

9 . The optical chamber base of claim 3 , wherein the unitary reflective component insert includes a first outer end surface that has a thickness that is greater than a thickness of a second outer end surface.

10 . The optical chamber base of claim 3 , wherein the unitary reflective component insert is fabricated from polycarbonate.

11 . The optical chamber base of claim 3 , wherein the chamber base body is fabricated from acrylonitrile, butadiene, and styrene.

12 . The optical chamber base of claim 3 , wherein the chamber base body includes at least one alignment peg that mates with a hole in a circuit board.

13 . The optical chamber base of claim 3 , wherein the chamber base body includes multiple alignment pegs that each mate with a corresponding hole in a circuit board.

14 . A smoke detector of a fire sensing system, comprising:

a circuit board body, having:

a set of front scattering emitting light sources located on one side of an optical chamber;

a receiver of front scattering light beams from the front scattering emitting light sources and backward scattering light beams; and

a set of backward scattering emitting light sources located between the set of front scattering emitting light sources and the receiver, the backward scattering light beams emitted from the backward scattering emitters; and

a unitary reflective component insert including:

a first end including two ellipsoidal emitter mirrors shaped to reflect the front scattering light beams toward a scattering zone of the optical chamber;

a second end including a receiver mirror within a receiver cavity;

side walls extending between the first end and the second end; and

a barrier positioned at an entrance to the receiver cavity, extending across the insert, and terminating at each of the side walls.

15 . The smoke detector of claim 14 , wherein the set of front scattering emitting light sources includes at least one infrared emitting light source.

16 . The smoke detector of claim 14 , the set of front scattering emitting light sources includes at least one blue emitting light source.

17 . The smoke detector of claim 14 , the set of backward scattering emitting light sources includes at least one infrared emitting light source.

18 . The smoke detector of claim 14 , the set of backward scattering emitting light sources includes at least one blue emitting light source.

19 . The smoke detector of claim 14 , wherein the unitary reflective component insert is mounted over the set of front scattering emitting light sources, the set of backward scattering emitting light sources, and the receiver.