Patent ID: 8317338
Filing Date: 2012-11-27
Classification: G02B

Abstract:
1. An image display apparatus for displaying an image by irradiating an eye of a user with laser light, the image display apparatus comprising: a laser light source for emitting laser light; a focus position adjustment section for adjusting a focus position of the laser light by adjusting a spread angle of the laser light emitted by the laser light source; a scanning section for scanning a predetermined to-be-scanned area by using the laser light adjusted by the focus position adjustment section as scanning light; a light deflection section disposed at the predetermined to-be-scanned area for leading the scanning light to a cornea of the user; a light detection section disposed at a position where the light detection section has an optically conjugate relation with a surface of the cornea through the light deflection section, for detecting, as a reflected light, a part of the scanning light reflected on the surface of the cornea and generating a detection signal; and a control section for controlling the laser light source, the focus position adjustment section, and the scanning section, wherein the control section controls the focus position adjustment section to adjust the focus position of the laser light such that the detection signal generated by the light detection section agrees with an initial setting signal that is generated in advance by the light detection section during an initial setting operation.