ISO 10934:2025

Overview - ISO 10934:2025 (Microscopes - Vocabulary for light microscopy)

ISO 10934:2025 is an international vocabulary standard that defines terms and definitions used in light microscopy and advanced light‑microscopy techniques. Intended as a single authoritative reference, the second edition updates and expands terminology to reflect modern imaging methods and detectors. This standard helps ensure consistent language across research, manufacturing, testing, documentation and education in optical microscopy.

Key topics and technical coverage

The document is a terminology (vocabulary) standard; it does not prescribe measurement methods but clarifies concepts and names. Major topic areas include:

• Core light‑microscopy terms: objective, condenser, numerical aperture (NA), Airy pattern/disc, Abbe theory, aperture, imaging/illumination path, aberrations (chromatic, spherical, coma, astigmatism, distortion).
• Beam and illumination concepts: Airy beam, Bessel beam, Gaussian beam, spatially/temporally coherent illumination, microlens, immersion and water‑dipping objectives.
• Image formation & resolution vocabulary: focal volume, voxel, Airy unit (AU), circle of least confusion.
• Advanced techniques & modern imaging: light sheet fluorescence microscopy, light field microscopy, computational microscopy, spectral unmixing, point spread function engineering.
• Detectors and electronics: point detectors, photodiode, photomultiplier, avalanche photodiode, CCD, EMCCD, sCMOS, single‑photon avalanche diode arrays.
• Sampling & data terms: sampling, Nyquist sampling, oversampling/undersampling, sampling rate, averaging, stitching, multi‑view fusion, high content/high throughput screening.

The Foreword documents newly added and amended terms in the 2025 edition, aligning vocabulary with contemporary instrumentation and computational methods.

Practical applications and target users

ISO 10934:2025 is useful for:

• Microscopists and researchers who require consistent terminology in publications, protocols and protocols.
• Instrument manufacturers and designers for clear product specifications and manuals.
• Standards committees, regulators and accreditation bodies to harmonize terminology across standards and conformity assessments.
• Laboratory managers and educators for training materials, SOPs and curricula.
• Software developers and data scientists working on image analysis and computational microscopy who need unambiguous definitions of imaging concepts.

Benefits include improved communication, reduced ambiguity in technical documents, and clearer procurement/specification language.

Related standards

• ISO 19012‑1 and ISO 19012‑2 (referenced in the standard) - for further information on objective correction and image‑field quality.
• ISO/TC 172 (Optics and photonics), SC 5 (Microscopes and endoscopes) - technical committee responsible for this work.

Keywords: ISO 10934:2025, light microscopy vocabulary, microscope terminology, optical microscopy terms, microscopy standard, advanced light microscopy.