Autostereoscopy Glossary: Key Terms for Glasses-Free 3D Displays
This glossary is a quick-reference companion to the canonical Autostereoscopic Display: Technical Explainer. It collects the terminology that buyers, integrators, and technical evaluators most often encounter when assessing glasses-free 3D display systems, autostereoscopic microscope workflows, and related spatial review setups.
Use it for fast definition lookup. For end-to-end learning, system architecture, and buyer-decision framing, follow the linked explainer as the hub.
Autostereoscopy Glossary: Key Terms for Glasses-Free 3D Displays.
What This Glossary Covers
The entries below are grouped by concern rather than alphabet, so a reader scanning for optical stack vocabulary, viewer-tracking vocabulary, image quality vocabulary, or content format vocabulary can move directly to the relevant cluster.
The glossary deliberately targets long-tail terminology queries such as “autostereoscopy glossary”, “glasses-free 3D terminology”, and “autostereoscopic display key terms” rather than the bare primary keyword.
Core Optical Terms
Autostereoscopy
The technique of delivering separate left-eye and right-eye views to a viewer without glasses, headsets, or other wearable optics. In display systems, autostereoscopy is typically implemented with an optical layer placed in front of a panel.
Autostereoscopic Display
A display that uses autostereoscopy to present stereoscopic imagery to the unaided eye. Current 3DV Spatial Display models are built around autostereoscopic architecture; for background and system framing, see the Autostereoscopic Display: Technical Explainer.
Lenticular Lens
A sheet of cylindrical microlenses placed over a display panel. Each lens refracts light so that pixels intended for the left eye and right eye are routed along different directions. Lenticular optics are one of the two dominant optical stacks used in autostereoscopic panels.
Parallax Barrier
A precisely slatted mask placed in front of a display panel. The slits occlude pixels so that each eye sees a different subset of the underlying image. Parallax barriers are the other dominant optical stack in autostereoscopic panels and are often used in lower-cost or thinner implementations.
Microlens Array
A two-dimensional grid of small lenses used to direct light per pixel, rather than per column. Microlens arrays are more common in light-field and high-view-count architectures than in standard two-view autostereoscopy.
Optical Stack
The layered combination of backlight, panel, optical film (lenticular or parallax barrier), cover glass, and any anti-reflective coatings. Optical stack choices directly affect brightness, crosstalk, viewing zone geometry, and panel thickness.
Architecture and Tracking Terms
Multi-View Architecture
An autostereoscopic design that simultaneously projects several discrete views across a wide range of viewing angles. Multiple viewers can stand in different positions and each receive a correct stereo image. The trade-off is per-view resolution, since panel pixels are divided across views.
Eye-Tracked Architecture
An autostereoscopic design that follows one or two viewers’ eyes with a sensor system and renders only the views the tracked eyes need. Eye-tracked designs preserve native panel resolution in the active views and are typically intended for a single primary viewer or a small paired-viewer setup. Current 3DV Spatial Display models use structured-light eye tracking combined with display-side FPGA processing.
Structured-Light Eye Tracking
An eye-tracking method that projects a known infrared pattern onto the viewer’s face and reconstructs eye position from how the pattern deforms. It is robust under variable lighting and is the tracking approach used in current 3DV Spatial Display models.
Display-Side FPGA Processing
The use of a field-programmable gate array on the display to remap left and right views in real time as the tracked viewer moves. FPGA-based remapping keeps latency low and avoids burdening the host workstation’s GPU.
Dynamic Stereo View Mapping
The continuous reassignment of which panel pixels feed the left eye and which feed the right eye as the tracked eye position changes. Dynamic mapping is what allows an eye-tracked autostereoscopic display to stay in stereo across small head movements.
Viewer and Viewing Zone Terms
Viewing Zone
The region in space where the viewer receives the correct left-eye and right-eye views. Inside the zone, stereo appears; outside it, the image collapses, inverts, or shows crosstalk.
Sweet Spot
The specific point within the viewing zone where stereo quality, brightness, and image alignment are at their best. Eye-tracked displays move the sweet spot with the viewer; multi-view designs have several sweet spots at fixed positions.
Single Primary Viewer
A configuration in which the display assumes one person occupies the optimal position. Eye-tracked autostereoscopic displays are typically designed around a single primary viewer, with a second viewer supported only where the architecture explicitly allows it.
Headroom
The vertical distance over which the display can track the viewer and still maintain a correct stereo image. Headroom is a practical comfort metric for seated review sessions where the viewer’s head shifts over time.
Head-Tracked
A system property in which the display or its optics respond to viewer head movement, usually as part of an eye-tracked architecture. Head-tracked systems aim to keep the sweet spot aligned with the viewer without manual adjustment.
Image Quality Terms
Crosstalk
The leakage of part of the left-eye image into the right eye, or vice versa. Crosstalk reduces perceived depth and can cause ghosting. It is governed by optical stack precision, subpixel layout, and view-mapping accuracy.
3D Resolution
The resolution a viewer actually perceives in stereo mode. In multi-view designs, 3D resolution is lower than native panel resolution because pixels are shared across views. In eye-tracked designs, 3D resolution can equal native panel resolution within the active view.
Native Panel Resolution
The physical pixel count of the underlying LCD or OLED panel before any view splitting. Native panel resolution sets the upper bound on perceived sharpness in both 2D and 3D operation.
Headroom (Optical)
In some optical-stack documentation, “headroom” is also used to describe the clearance between the panel surface and the optical layer. The two uses are distinct; context determines which applies.
Content Format Terms
Side-by-Side (SBS)
A stereo format in which the left-eye image occupies the left half of a frame and the right-eye image occupies the right half. SBS is one of the most widely supported stereo inputs for autostereoscopic displays.
Top-and-Bottom (TAB)
A stereo format in which the left-eye image is stacked above the right-eye image within a single frame. TAB is common in stereo video pipelines that need to preserve horizontal resolution.
Interlaced Stereo
A stereo format in which left-eye and right-eye rows or columns alternate within a frame. Interlaced stereo is sometimes used with parallax-barrier or lenticular panels, but it requires careful alignment with the optical layer.
Stereo Content
Any visual content that contains a separate left-eye view and right-eye view, whether delivered as SBS, TAB, interlaced, or per-view buffers. For a deeper treatment of which content types fit which workflows, see Spatial Display Content Compatibility.
Related categories and how autostereoscopy differs from neighboring glasses-free and stereoscopic techniques.
Switching and Resolution Terms
2D / 3D Switching
The ability of an autostereoscopic display to toggle between a full-resolution 2D mode and a stereo 3D mode. Switching is useful for review workflows that mix ordinary desktop applications with 3D review tasks. Pro-tier 3DV Spatial Display models are positioned for workflows that frequently alternate between 2D and 3D use.
Pro vs Essential Framing
A fit-for-use distinction rather than a technical term. Pro models emphasize strong 2D/3D switching and mixed-mode workstation use; Essential models emphasize dedicated 3D spatial monitor use. See the Display Selector for a fit-based recommendation.
Native Panel vs 3D Resolution
The distinction between the panel’s physical pixel count and the resolution the viewer perceives in stereo mode. Understanding this distinction is essential when comparing autostereoscopic specifications against conventional monitor specifications.
Related Categories, Distinctions, and Adjacent Terms
These terms are frequently confused with autostereoscopy. They are listed here so that glossary readers can place autostereoscopy in its broader category context without conflating it with neighboring techniques.
- Stereoscopic Display. A display that delivers separate left and right views, usually with glasses. Autostereoscopic displays are a glasses-free subset of stereoscopic displays.
- Light-Field Display. A display that reconstructs directional light information across many views, often using a microlens array. Light-field displays are related to autostereoscopy but typically support a wider range of viewing angles and more continuous parallax.
- Holographic Display. A display that records or reconstructs wavefront information. Holography and autostereoscopy share a goal of glasses-free 3D but use different underlying physics.
- Volumetric Display. A display that occupies a physical volume and presents image points within it. Volumetric displays do not require stereoscopic separation between two views.
- VR Headset. A wearable display that delivers separate left and right views through near-eye optics. VR is a stereoscopic delivery method, not an autostereoscopic one.
Where to Go Next
- For full system background, start with the Autostereoscopic Display: Technical Explainer.
- For buyer-decision framing around glasses-free viewing, see Naked-Eye 3D: Technical Explainer.
- For display-hardware evaluation, see 3D Display Screen: Technical Explainer.
- For content format compatibility, see Spatial Display Content Compatibility.
- To match terminology knowledge to a specific display model, use the Display Selector.
Where SBS, TAB, and interlaced stereo formats enter an autostereoscopic display workflow.
Autostereoscopy, autostereoscopic display, glasses-free 3D, spatial 3D, and related product references describe the technology category in which 3DV Spatial Display systems operate. Specifications, model fit, and availability should be verified against current product data before purchase decisions.