Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
115 words
A helmet visor display comprising: an image source generator operable to generate an image a combiner; and a relay module comprising refractive elements; and at least one diffractive optical element, said image being relayed from said image generator to said combiner by said relay module; wherein the relay module is comprised of a front-end collimating lens group disposed close to the combiner, a rear-end focusing lens group disposed close to the image source generator, and a pupil lens group disposed therebetween, and wherein the collimating lens group and the focusing lens group are disposed on opposite sides of the pupil lens group to form a symmetric relay lens group, to partially self-compensate for asymmetric aberrations.
Claim 2
Dependent Claim
115 words
A helmet visor display comprising: an image source generator operable to generate an image a combiner; and a relay module comprising refractive elements; and at least one diffractive optical element, said image being relayed from said image generator to said combiner by said relay module; wherein the relay module is comprised of a front-end collimating lens group disposed close to the combiner, a rear-end focusing lens group disposed close to the image source generator, and a pupil lens group disposed therebetween, and wherein the collimating lens group and the focusing lens group are disposed on opposite sides of the pupil lens group to form a symmetric relay lens group, to partially self-compensate for asymmetric aberrations.
Claim 3
Dependent Claim
42 words
The helmet visor display of claim 1 wherein the relay module is disposed to generate an intermediate image from an image provided by the image generator that is collimated by the combiner to form an image pupil for viewing by a user.
Claim 4
Dependent Claim
29 words
The helmet visor display of claim 1 wherein the collimating lens group, pupil lens group, and the rear-end focusing lens group each comprises at least one positive power lens.
Claim 5
Dependent Claim
42 words
The helmet visor display of claim 1 wherein the collimating lens group is comprised of a refractive doublet and a refractive-diffractive optical element for correcting primary and secondary axial chromatic aberration, and significantly reduce higher order aberration in the helmet visor display.
Claim 6
Dependent Claim
31 words
The helmet visor display of claim 1 wherein the pupil lens group is comprised of at least one lens that is positioned relative to the intermediate image to reduce spherical aberration.
Claim 7
Dependent Claim
28 words
The helmet visor display of claim 5 wherein the at least one lens comprises a spherical lens that provides for third order and higher order spherical aberration correction.
Claim 8
Dependent Claim
28 words
The helmet visor display of claim 5 wherein the at least one lens comprises a conic lens that provides for third order and higher order spherical aberration correction.
Claim 9
Dependent Claim
28 words
The helmet visor display of claim 5 wherein the at least one lens comprises an aspheric lens that provides for third order and higher order spherical aberration correction.
Claim 10
Dependent Claim
28 words
The helmet visor display of claim 1 wherein the pupil lens group is comprised of a diffractive optical element that provides for axial chromatic aberration and spherochromatism correction.
Claim 11
Dependent Claim
30 words
The helmet visor display of claim 1 wherein the pupil lens group is decentered with respect to the collimating lens group to correct the axial coma introduced by the combiner.
Claim 12
Dependent Claim
40 words
The helmet visor display of claim 3 wherein the combiner has a spherical surface shape, and the radius of the combiner is adjusted such that the eye pupil is relayed to the pupil lens group of the relay lens module.
Claim 13
Dependent Claim
26 words
The helmet visor display of claim 1 wherein the focusing lens group comprises a crown-flint refractive doublet that reduces primary lateral chromatic aberration and chromatic distortion.
Claim 14
Dependent Claim
25 words
The helmet visor display of claim 1 wherein the wedge of the focusing lens group is used to reduce axial coma introduced by the combiner.