Optical contact bonding

Optical contact bonding is when two things are stuck together by using light. It's like when you put glue on paper and then press two pieces of paper together to make them stick, but instead of using glue, we use light.

To do optical contact bonding, we have two things we want to stick together, like two pieces of glass. We make sure they are very clean and flat so they fit together perfectly. Then we put them very close together, almost touching.

Next, we shine a strong light on the two pieces of glass. The light has a special kind of energy that heats up the surfaces of the glass just a tiny bit, so they start to stick together. It's like a very, very weak version of when you put butter on toast and it starts to melt from the heat.

And that's it! Now the two pieces of glass are stuck together with a strong bond. This method is used a lot in things like making camera lenses or computer chips. It's a very precise way of sticking things together and makes sure they don't come apart easily.