Flat focus: Difference between revisions
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{{see also|Terms|Technical Terms}} | {{see also|Terms|Technical Terms}} | ||
[[Flat focus]] refers to an [[optical system]] design, common in [[virtual reality]] (VR) and [[augmented reality]] (AR) [[head-mounted display|headsets]] (HMDs), where the [[lens|lenses]] are optimized to bring light originating from the [[microdisplay]] (the screen) to a sharp [[focus]] at a single, fixed [[focal plane]]. This means that regardless of the apparent depth of virtual objects depicted on the screen, the light reaching the user's eye always appears to emanate from this specific, unchanging distance. | |||
This approach contrasts sharply with how the [[human visual system]] naturally perceives the real world. In reality, the [[eye]] employs a process called [[accommodation (optics)|accommodation]], where the [[crystalline lens]] dynamically changes its shape (and thus its focal length) to sharply focus on objects at varying distances. Concurrently, the eyes use [[vergence (optics)|vergence]], rotating inward ([[convergence]]) or outward ([[divergence]]) to align their gaze on the object of interest, providing crucial [[depth perception]] cues through [[binocular disparity]]. | This approach contrasts sharply with how the [[human visual system]] naturally perceives the real world. In reality, the [[eye]] employs a process called [[accommodation (optics)|accommodation]], where the [[crystalline lens]] dynamically changes its shape (and thus its focal length) to sharply focus on objects at varying distances. Concurrently, the eyes use [[vergence (optics)|vergence]], rotating inward ([[convergence]]) or outward ([[divergence]]) to align their gaze on the object of interest, providing crucial [[depth perception]] cues through [[binocular disparity]]. | ||
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== References == | == References == | ||
<references/> | <references/> | ||
[[Category:Terms]] | |||
[[Category:Technical Terms]] | |||
[[Category:Optics]] | |||
[[Category:Display Technology]] | |||
[[Category:Virtual Reality]] | |||
[[Category:Augmented Reality]] | |||
[[Category:Human Visual System]] | |||