Barcode Scanner
A barcode scanner (or reader) is the device that illuminates a barcode, captures the reflected light or an image, and runs a decode algorithm to recover the data.
What You Need to Know
Laser scanners sweep a beam across linear symbols and measure the timing of dark and light intervals — cheap, fast, long-range for 1D, but blind to 2D grids. Imager-based scanners (CMOS or CCD) photograph the symbol and decode it as an image: they read 2D symbologies, tolerate omni-directional presentation, and capture from screens. The installed base matters: a warehouse full of laser-only handhelds cannot read your QR codes no matter how well they print.
Beyond the sensor, decoding is signal processing: binarizing the waveform or image, finding start patterns, measuring element ratios against expected values, checking the check digit. This is why physical fidelity — integer module widths, clean contrast, honest quiet zones — translates directly to decode success, and why the same barcode can scan perfectly on one device and fail on another with different optics or firmware.
Where Barcode Scanner Applies
A high-density, variable-length linear barcode that encodes all 128 ASCII characters, and the backbone symbology of modern logistics.
Generate Code 128 →The 13-digit retail point-of-sale barcode used on consumer products worldwide outside North America.
Generate EAN-13 →The dominant 2D matrix barcode: up to 7,089 digits in a square symbol with selectable error correction.
Generate QR Code →A compact 2D matrix code with fixed Reed-Solomon error correction — the standard for pharma serialization and tiny parts.
Generate Data Matrix →