OBSERVATION OPTICAL SYSTEM AND IMAGE DISPLAY APPARATUS USING OBSERVATION OPTICAL SYSTEM
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United States of America
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Issued Date -
Nov 28, 2024
app pub date -
May 20, 2024
filing date -
May 20, 2024
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status (Latency Note)
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Abstract
An observation optical system configured to guide light from a display device configured to display an image to an observer includes a lens having a display-side surface and an observation-side surface with different curvature radii, and includes a first semi-transmissive reflective surface, a first λ/4 plate, a second semi-transmissive reflective surface, a second λ/4 plate, and a polarization plate, which are sequentially arranged from a display side to an observation side, and wherein, when, out of the first semi-transmissive reflective surface and the second semi-transmissive reflective surface, a reflection surface having a smaller absolute value of a focal length is a reflection surface A, a focal length of the reflection surface A is fA, and an air conversion distance on an axis from a position of an exit pupil to the reflection surface A is LaA, the following inequality is satisfied: 1.0
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