Patent US2800232A successfully refreshed from Google Patents.
US3807829A
Expired / Lapsed
US
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Extended-field holographic lens arrays
Assignee: Raytheon Co
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Filing: 1973-04-30
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Granted: 1974-04-30
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Expires: 1993-04-30
Abstract
Abstract Multiple holographic lenses are provided in the same structure by recording in a spatial array the interference patterns of coherent reference and object beams from pairs of point sources to provide an increased field of view with high resolution. A method for constructing, evaluating and correcting the arrays is disclosed. In constructing the array of holographic lenses, the focal points of the object and reference beams are selected to divide the angular field of view across an extended field. All object points are on one selected focal plane and all reference points are on another focal plane, such as at infinity. When the recorded array is illuminated with coherent light of the proper wavelength from points on one image plane, the light is imaged on the other focal plane, such as the focal plane at infinity as viewed from the side of the array opposite the side of the array from which the holographic lenses were formed with the missing beam. The same techniques apply to reflection lens arrays and to transmission lens arrays.
Inventors
- 👤 D Close
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:42
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/18; G02B5/1876; G02B5/188; G02B5/1885; G02B5/32; G03; G03H; G03H1/00; G03H1/02; G03H1/024; G03H1/0248; G03H1/26; G03H1/30; G03H1/04; G03H1/0486; G03H2223/00; G03H2223/19
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
174 words
A holographic lens comprised of an array of contiguous nonoverlapping holograms on a single film of light-sensitive material, each hologram comprising a recording of a unique interference pattern formed by interference between two mutually coherent beams of light, each beam originating at a point source in a different one of two surfaces, each surface consisting of an array of contiguous segments and each hologram being formed with a uniquely located point source in a unique segment of each said surface, thus providing a holographic lens with conjugate focal points on said two surfaces such that when the lens is thereafter illuminated by point sources of playback light in one surface forming an image, said points of playback light are imaged in the other surface, thereby projecting an image from one surface onto the other surface, and wherein discontinuities in said projected image are minimized by so choosing the locations of said two beams of light for constructing said holograms that fringe planes in some adjacent holograms are parallel at the intersection of the holograms.
Claim 2
Dependent Claim
174 words
A holographic lens comprised of an array of contiguous nonoverlapping holograms on a single film of light-sensitive material, each hologram comprising a recording of a unique interference pattern formed by interference between two mutually coherent beams of light, each beam originating at a point source in a different one of two surfaces, each surface consisting of an array of contiguous segments and each hologram being formed with a uniquely located point source in a unique segment of each said surface, thus providing a holographic lens with conjugate focal points on said two surfaces such that when the lens is thereafter illuminated by point sources of playback light in one surface forming an image, said points of playback light are imaged in the other surface, thereby projecting an image from one surface onto the other surface, and wherein discontinuities in said projected image are minimized by so choosing the locations of said two beams of light for constructing said holograms that fringe planes in some adjacent holograms are parallel at the intersection of the holograms.
Claim 3
Dependent Claim
38 words
A holographic lens as defined in claim 1 wherein one of said surfaces of point sources is virtually a plane at infinity, thus forming a collimating lens for projecting out to infinity an image from the other surface.
Claim 4
Dependent Claim
43 words
A holographic lens as defined in claim 2 wherein said one of said surfaces of point sources that is virtually at infinity is on the opposite side of said film of light-sensitive material during construction, whereby said lens is a reflection-type holographic lens.
Claim 5
Dependent Claim
43 words
A holographic lens as defined in claim 2 wherein said one of said surfaces of point sources that is virtually at infinity is on the same side of said film of light-sensitive material during construction, whereby said lens is a transmission-type holographic lens.
Claim 6
Dependent Claim
35 words
A holographic lens as defined in claim 1 wherein said two surfaces of point sources are on opposite sides of said film of light-sensitive material during construction, whereby said lens is a reflection-type holographic lens.
Claim 7
Dependent Claim
36 words
A holographic lens as defined in claim 1 wherein said two surfaces of point sources are on the same side of said film of light-sensitive material during construction, whereby said lens is a transmission-type holographic lens.
Claim 8
Dependent Claim
109 words
A holographic leNs as defined in claim 1 wherein the direction of said two beams during construction of said holograms are specified by unit vectors R and O, and said interference pattern is recorded in the form of interference fringe planes normal to a unit vector N which varies directly as O - R, and two independent sets of fringe planes defined by their normals N1 Alpha O1 - R1 and N2 Alpha O2 - R2 are provided for selected pairs of adjacent holograms with N1 equal to N2 at their intersection, thereby providing parallel fringe planes at their intersection for minimum discontinuity of focal power at said intersection.
Claim 9
Independent Claim
249 words
A method for producing a holographic lens on a substrate comprising providing a light-sensitive film on said substrate, producing an object beam of narrow bandwidth and with substantial spatial coherence, producing a reference beam of the same narrow bandwidth and with substantial spatial coherence as said object beam, masking said film for exposure of said light-sensitive material to said object beam and said reference beam in discrete contiguous areas, each exposed area forming a single hologram, said beams penetrating said film being mutually coherent in said film to produce an interference pattern, orienting said beams of light during exposure of each area such that said object beam appears to emanate from a point on a first surface and said reference beam appears to emanate from a second surface, each surface consisting of an array of contiguous segments and each hologram being formed with a uniquely located beam in a unique segment of each said surface, thus constructing a holographic lens with conjugate focal points on said two surfaces such that when the lens is thereafter illuminated by point sources of playback light in one surface forming an image, said points of playback light are imaged in the other surface, thereby projecting an image from one surface onto the other surface, and wherein discontinuities in said projected image are minimized by so choosing the locations of said two beams of light for constructing said holograms that fringe planes in some adjacent holograms are parallel at the intersection of the holograms.
Claim 10
Independent Claim
249 words
A method for producing a holographic lens on a substrate comprising providing a light-sensitive film on said substrate, producing an object beam of narrow bandwidth and with substantial spatial coherence, producing a reference beam of the same narrow bandwidth and with substantial spatial coherence as said object beam, masking said film for exposure of said light-sensitive material to said object beam and said reference beam in discrete contiguous areas, each exposed area forming a single hologram, said beams penetrating said film being mutually coherent in said film to produce an interference pattern, orienting said beams of light during exposure of each area such that said object beam appears to emanate from a point on a first surface and said reference beam appears to emanate from a second surface, each surface consisting of an array of contiguous segments and each hologram being formed with a uniquely located beam in a unique segment of each said surface, thus constructing a holographic lens with conjugate focal points on said two surfaces such that when the lens is thereafter illuminated by point sources of playback light in one surface forming an image, said points of playback light are imaged in the other surface, thereby projecting an image from one surface onto the other surface, and wherein discontinuities in said projected image are minimized by so choosing the locations of said two beams of light for constructing said holograms that fringe planes in some adjacent holograms are parallel at the intersection of the holograms.
Claim 11
Independent Claim
36 words
A method as defined inclaim 8 wherein one of said surfaces of point sources is virtually a plane at infinity, thus forming a collimating lens for projecting out to infinity an image from the other surface.
Claim 12
Dependent Claim
42 words
A method as defined in claim 9 wherein said one of said surfaces of point sources that is virtually at infinity is on the opposite side of said film of light-sensitive material during construction, whereby said lens is a reflection-type holographic lens.
Claim 13
Dependent Claim
42 words
A method as defined in claim 9 wherein said one of said surfaces of point sources that is virtually at infinity is on the same side of said film of light-sensitive material during construction, whereby said lens is a transmission-type holographic lens.
Claim 14
Dependent Claim
34 words
A method as defined in claim 8 wherein said two surfaces of point sources are on opposite sides of said film of light-sensitive material during construction, whereby said lens is a reflection-type holographic lens.
Claim 15
Dependent Claim
35 words
A method as defined in claim 8 wherein said two surfaces of point sources are on the same side of said film of light-sensitive material during construction, whereby said lens is a transmission-type holographic lens.
Claim 16
Dependent Claim
108 words
A method as defined in claim 8 wherein the direction of said two beams during construction of said holograms are specified by unit vectors R and O, and said interference pattern is recorded in the form of interference fringe planes normal to a unit vector N which varies direcgly as O - R, and two independent sets of fringe planes defined by their normals N1 Alpha O1 - R1 and N2 Alpha O2 - R2 are provided for selected pairs of adjacent holograms with N1 equal to N2 at their intersection, thereby providing parallel fringe planes at their intersection for minimum discontinuity of focal power at said intersection.
Claim 17
Dependent Claim
53 words
A method as defined in claim 8 wherein said object beam is a diverging beam and said reference beam is a collimated beam, whereby said object beam emanates from said first surface at a finite distance from said film and said reference beam emanates from said second surface at a virtually infinite distance.
Claim 18
Dependent Claim
205 words
A method as defined in claim 15 wherein the directions of unit vectors R of the reference beam are specified by lines connecting the centers of said areas with the center of a viewing pupil at a desired distance from the center of a central one of all said areas, and the directions of unit vectors O of the object beam are specified as follows: for said control area constituting a first hologram, the direction of the unit vector O1 is specified by establishing the center of said first surface from which said object beam emanates and said center of all said areas; and for all other areas constituting holograms of said lens, the directions of unit vectors Oi for the object light beam are chosen to produce two independent sets of fringe planes in adjacent areas, said fringe planes being defined by their normals Ni Alpha Oi - Ri and Ni 1 Alpha Oi 1 - Ri 1 where said unit vector Ni and Ni 1 normal to said fringe planes are parallel and said vectors Oi, Ri, Oi 1 and Ri 1 specify directions of said diverging and collimated beams at intersections between adjacent areas that are to be aligned at their intersections.
Claim 19
Dependent Claim
27 words
A method as defined in claim 16 wherein directions of said object and reference beams are from opposite sides of said film to form a reflection-type lens.
Claim 20
Dependent Claim
28 words
A method as defined in claim 17 wherein directions of said object and reference beams are from the same side of said film to form a transmission-type lens.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-29 | 1977-10-29 | 1978-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-29 | 1981-10-29 | 1982-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-29 | 1985-10-29 | 1986-04-30 | $7700.00 | Window Closed / Lapsed |