Sony Group Corporation
OBSERVATION OPTICAL SYSTEM AND IMAGE DISPLAY APPARATUS

Abstract:

An observation optical system according to the present invention includes a reflective optical device (30), a first lens group (10), and a second lens group (20). The reflective optical device (30) includes at least one reflection surface (31). The first lens group (10) is disposed at a position closer to an entrance pupil (E.P.) than the reflective optical device (30). The first lens group (10) forms an intermediate image (40) of a virtual image on the reflection surface (31) or at a position closer to the entrance pupil (E.P.) than the reflection surface (31). The intermediate image (40) of the virtual image corresponds to an image displayed on an image display unit (2). The second lens group (20) is disposed on an optical path after light passes through the first lens group (10), the intermediate image (40), and the reflective optical device (30) in order in a case where ray tracing is performed from an entrance pupil (E.P.) side. The second lens group (20) is disposed to cause an image (50) of the entrance pupil (E.P.) to be formed on an optical path after light is reflected by the reflection surface (31).