Hierarchy classification:

1. top of the aat hierarchies
2. Activities Facet
3. Processes and Techniques (hierarchy name)
4. [processes and techniques by specific type]
5. [image-making processes and techniques]
6. [photography and photographic processes and techniques]
7. photographic techniques
8. picture-taking techniques
9. [picture-taking techniques by radiation type]
10. radiography
11. tomography
12. optical coherence tomography

Anotations

Scope note:

A spectrometer-based OCT technique using a broadband light source and an interferometer. A low-loss spectrometer measures the spectrum of the interference pattern of light returned from the reference and sample arms of the interferometer. SDOCT has been used in a conservation science context for noninvasive and noncontact assessment of varnish layer thickness and structure on easel paintings.