Patent ID: 6462882
Filing Date: 2002-10-08
Classification: G02B

Abstract:
A display device for a display wavelength range, comprising:an image source; a relay group made of optical elements transparent to the display wavelength range, the relay group comprising a glass optical wedge, a glass lens, and a group of plastic lenses including a diffractive optical element, the group of plastic lenses being positioned between the glass optical wedge and the glass lens, wherein the group of plastic lenses comprises: an aspheric lens module having a front face in facing relation to a back face of the optical wedge, and a back face, an aspheric lens having a front face in facing relation to the back face of the aspheric lens module, a back face, and an optical axis, the aspheric lens module being tilted and decentered with respect to the optical axis of the aspheric lens, and a diffractive-optical-element lens module having a front face in facing relation to the back face of the aspheric lens, and a back face in facing relation to a front face of the glass lens; and a reflective combiner in facing relation to the glass lens.