| 摘要 |
<p>An optical apparatus which records light (B) reflected from one or more of a user's facial features is disclosed. Whilst the image is captured, visible light (A) from a display (170) or other scene to be viewed by the user passes to the user's eye (110). Prior apparatuses of this type have been arranged such that a significant proportion of the light reflected from the user's face is not incident on an image capture device inside the apparatus. The embodiment described is a portable iris pattern capture device (12). In the embodiment near-infrared light (B) is directed towards the user's eye (110), from where it is reflected back into the apparatus. Visible light (A) from an LCD display (170) mounted at the rear of the apparatus travels out to the user's eye (110) from the apparatus. A hot mirror (145) inside the apparatus directs the near-infrared light (B) reflected from the user's eye to a camera unit (135), and does not significantly attenuate the visible light (A) emanating from the display (170).</p> |
