Patent ID: 7874679
Filing Date: 2011-01-25
Classification: F24C,G03B,H04N

Abstract:
1. Imaging apparatus for a heating appliance, the imaging apparatus including image creation means for creating a moving image, means for enlarging the image, and a display screen for displaying the image in use to a viewer, the image creation means including a substantially planar image creation screen on which the image is created, the image creation screen comprising the display screen, the enlarging means including a lens arrangement which includes at least one lens, the or each lens being in the form of a Fresnel lens, in which the lens arrangement has the effect of a converging lens, having an effective focal length that is greater than the distance between the lens arrangement and the image creation means, so that the image seen by the viewer is a virtual image, and wherein the or each Fresnel lens is curved concavely when viewed in plan in use relative to the image creation means.