Red Point Measure by Huang QiaoKun

Red Point Measure is a digital measuring instrument for interior use created by Huang QiaoKun. Using a laser beam measuring technique and simple mathematics, it measures a target length without the user needing to physically do so.

Laser rays carry a certain electromagnetic wave. When the electromagnetic wave is reflected by the object, it returns at an interval from the original one. The microcomputer inside the device can calculate the distance. The laser ray beam used in the device is one
that is not harmful to the eyes – that is, one with a 905 nm or 1540 nm wavelength.

Source: Red Dot Design Award 2008