i1d

i1D refers to a term that appears in several unrelated contexts. In each case the representation is short for a concept that is limited to a single dimension.

In computing, i1D is an abbreviation for an integer one‑dimensional array that is used in low‑level programming. The type is commonly defined in system headers as an array of 32‑bit signed integers indexed from 0 to n‑1. Such arrays are employed in performance critical code such as graphics shaders, network packet parsing, and embedded firmware where a single contiguous memory block is required for storage and fast sequential access.

In experimental physics, i1D denotes a family of one‑dimensional displacement sensors that use interferometric or capacitive readout to measure a single axis of motion with sub‑nanometer precision. The most common implementation is the i1D interferometer, which consists of a laser source, a movable mirror, and a photodetector arranged in a Michelson configuration. These instruments are used in vibration isolation platforms, precision stage control, and in metrology laboratories that require high resolution along a single direction.

In marketing, i1D is the brand name of a series of compact automotive printers produced by the company Intellitec in 2023. The printers are marketed as “industrial 1‑dimensional” devices capable of printing durable barcodes, matrix codes, and G‑code instructions on a continuous roll of paper or foil. The i1D line is praised for its low operating cost, simple integration with PLCs, and support for up to 1,200 lines per minute.

Although the three uses of i1D share a common numeric prefix, the term is domain‑specific and should be interpreted according to the surrounding context.