Think about your IR lamp for a second. If the reflector geometry is off, you aren’t actually heating your workpiece—you’re just paying to warm up the machine’s chassis. It’s a waste. Here’s the deal: a standard lamp throws energy in every direction, 360 degrees. If you don’t have a reflector that’s dialed in, you’re basically throwing half your heat away the moment you flip the switch. The magic is in the curve. Whether it’s parabolic, elliptical, or cylindrical, that shape decides exactly where the heat lands. A parabolic curve takes those scattered rays and squeezes them into a tight, parallel beam. That’s how you get real energy density on the surface. But it’s a delicate balance. If the geometry is off by just a few millimeters? You’ll start seeing “cold spots.” You’ll get uneven heating across your fabric, and that’s a headache nobody wants. More heat, more risk. When you tighten that beam, you hit your target temperature way faster. We use gold or polished aluminum coatings to make sure the rays actually bounce instead of getting soaked up by the reflector itself. But be careful. Tightening the beam puts a lot of stress on a small area. If you push too many watts into one tiny spot, you might scorch the surface before the core even gets warm. It’s a fine line between a perfect cure and a burnt mess. The trade-off. You can’t optimize the light path in a vacuum. To get that tight, efficient beam, you usually have to move the lamp closer to the material. The downside? You lose your depth of field. Your working footprint shrinks. We usually handle this by balancing the reflector angle with the conveyor speed. You want the material to hang out in that “sweet spot” just long enough to set. When you get this right, you can actually turn down the power and save money without slowing down your production at all.