Spectacle glass annealing lamp

Wed, 22 Jul 2026 03:09:29 +0800

Dealing with Voltage Headaches in Glass Annealing

When you’re annealing spectacle glass, it’s all about the balance. You need those thermal gradients to be spot on so the internal stress disappears, but you don’t want to warp the lens in the process. We build the infrared (IR) heating lamps for these lehrs, but if you ask any of our engineers, they’ll tell you the heat isn’t actually the hardest part. The real nightmare? The power grid.

The Voltage Struggle: 110V vs. 575V

Here’s the problem: you can’t just buy a generic lamp off the shelf and expect it to work everywhere. If you take a lamp designed for 110V in North America and plug it into a 480V or 575V industrial line, it’ll pop instantly. Not a good look. That’s why we get into the weeds with the tungsten filaments. We tweak the length and the diameter specifically to match whatever voltage your site is running. And there’s a silver lining to going with higher voltage (like 480V or 575V). You can run more lamps on a single circuit without tripping your breakers. Plus, you don’t have to pull massive, heavy-gauge wiring through your chassis. It keeps the footprint clean and keeps the current draw low.

Spectacle on Warm IR Quartz Heaters

Spectacle glass annealing lamp

Dealing with Voltage Headaches in Glass Annealing

The Voltage Struggle: 110V vs. 575V