Patent ID: 9535251
Date: 2017-01-03
CPC Classifications: G02B,G06K

Claim:
1. A head-mounted display (HMD) apparatus comprising: an imaging optical system for an eye of a user, the imaging optical system comprising a display unit to be viewed by the eye of the user, and a control device to acquire a viewing direction of the eye of the user within a field of view of the display unit using an eye camera; a camera holder to receive the eye camera, the camera holder being selectively adjustable in relationship to the display unit to vary an orientation of the eye camera in terms of a peripheral angle around a viewing central axis of the field of view and in terms of a setting angle with respect to the viewing central axis; a peripheral position ring that surrounds the field of view; and a setting angle unit for different setting angles, the camera holder mountable detachably on the setting angle unit to selectively adjust the setting angle, the setting angle unit mountable detachably on the peripheral position ring and adjustable in discrete notch steps along the peripheral position ring to selectively adjust the peripheral angle.