Checkout counters bounce halo LEDs onto payment terminals and glossy loyalty tablets. Instead of importing unfamiliar sensors, we photograph glare through handheld polarizers at three heights — cashier eye line, shopper eye line, and seated accessibility line.
Those photographs stack into a reflection matrix annotated with bezel angles and receipt printer positions. Creative ops uses the matrix to decide whether halo saturation drops or whether LCD stacks borrow warmer palettes.
When airports or hospitals adopt the kit, we duplicate the matrix under fluorescent versus warmer lamp temperatures because reflective ratios swing sharply.