What are the reasons for cracks in led lenses?

The led lens can improve the use efficiency and luminous efficiency of light, and can be used according to different effects. Specifications are penetrating and refracting. What are the causes of cracks in the general led lens?

1. The crack of the led lens may be related to the quality of the glue, because the glue will produce tiny air bubbles after curing, which will expand and rupture after heating. If the glue operation time is too long, the longer the epoxy AB glue is mixed, the thicker the viscosity of the glue will be. When the glue thickens, it will be difficult for air bubbles to be discharged.

2. The amount of glue is too large: the epoxy resin glue is at a certain ambient temperature, the larger the amount of glue at one time, the faster the curing speed. If the amount of glue is too large, the viscosity of the glue will gradually increase over time, the glue will become more viscous, and the air bubbles will be relatively difficult to discharge.