Traditional Culture Encyclopedia - Hotel accommodation - What is the reason for the interlayer between LED high-power lamp bead lens and silica gel?

What is the reason for the interlayer between LED high-power lamp bead lens and silica gel?

There may be two reasons for this.

If there is this before reflow soldering, there may be two reasons: first, the air is not exhausted when vacuuming, and second, the operation is wrong when injecting glue.

If there is no such phenomenon before reflow soldering, there is such a situation after reflow soldering, it is because the thermal expansion rate of lens and silicone is different. If the bubbles disappear after cooling, it will not affect the use. If it doesn't disappear, it's broken. You need to consider replacing the glue.