Segmentation by type classifies Animal Optical Coherence Tomography Imaging Systems into three architectural families: Spectral‑Domain OCT (SD‑OCT), Swept‑Source OCT (SS‑OCT), and Time‑Domain OCT (TD‑OCT). SD‑OCT, with its high axial resolution (2–5 µm) and moderate imaging depth, dominates the market, capturing roughly 55 % of unit sales, especially in ophthalmic and small‑animal studies where fine structural detail is paramount. SS‑OCT, offering deeper penetration (up to 6 mm) and faster scan rates, occupies about 35 % of the market, favored in cardiovascular and large‑animal applications that demand volumetric assessment of thicker tissues. TD‑OCT, an older technology with lower resolution and speed, now represents a niche segment (~10 %) used primarily for cost‑sensitive laboratories or legacy research protocols. The distribution of these types directly influences overall market valuation through differentiated pricing structures, maintenance contracts, and upgrade cycles.