Patent ID: 9366864
Filing Date: 2016-06-14
CPC Classification: G02B

Claim Text:
1. A head up display for providing an image and being employed without a combine alignment detector, the head up display comprising: a micro-image source; collimating optics configured to receive the image from the micro-image source, wherein the collimating optics form a catadioptric optical system comprising a folded path comprising a fold component, a first lens, a polarizing beam splitter, a collimating mirror and a corrective lens in an on-axis arrangement and wherein the first lens is attached to the polarizing beam and is disposed between the polarizing beam splitter and the micro-image source; a combiner receiving collimated light from the collimating optics at an input and providing the collimated light to an output, the collimated light traveling from the input to the output within the combiner by total internal refraction; and a stow mechanism configured to move the combiner out of a head path in a crash event or to move the combiner to and from an operational position and a stowed position, wherein an input diffraction grating is disposed at the input and an output diffraction grating is disposed at the output, whereby the combiner is configured to achieve a periscopic effect.