The glue fixture is a mold used to glue the lens and transducer together. A proper glue fixture makes the designed lens and transducer concentric.

Material: The recommended material is Al 6061-T6.

Geometry:Figure 3-9 shows the section view and isometric view of a glue fixture, together with the Lens Cover. The dimensions of a glue fixture are determined based upon the dimensions of the lens and transducer and account for all tolerances. The design of the glue fixture must meet the following guidelines:

1. The inner diameter of the glue fixture cap must be slightly larger than the lens diameter so that the lens can fit inside the glue fixture.
2. Similarly, the corresponding diameter of the glue fixture base must be slightly larger than the transducer diameter (T_OD + tolerance) so that the transducer can fit inside the glue fixture.
3. A gap shall be created between the top part of the transducer and the glue fixture to avoid the gluing the lens cover to the fixture.
4. The center of the glue fixture must be hollow so that the lens cover can be easily removed from the glue fixture.