a point about ten percent above the exact center of a printed page or layout.
noun, Computers. 1. the process or technology of reading data in printed form by a device (optical character reader) that scans and identifies characters. Abbreviation: OCR. optical character recognition The electronic identification and digital encoding of printed or handwritten characters by means of an optical scanner and specialized software.
noun 1. an experimental computer that uses photons rather than electrical impulses to process data a thousand times faster than with conventional integrated circuits.
- Optical crown
noun 1. an optical glass of low dispersion and relatively low refractive index. It is used in the construction of lenses
- Optical density
noun 1. (physics) the former name for reflection density, transmission density optical density n. See absorbance.