US4472029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integrated wavefront compensator
Assignee: Northrop Grumman Guidance and Electronics Co Inc
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Filing: 1982-03-01
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Granted: 1984-09-18
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Expires: 2002-03-01
Abstract
Abstract An integrated wavefront compensator for an active optics system in which the components for detecting distortions in a wavefront and the components for correcting the detected wavefront distortions are integrated into one unit. The parallel processing channels of the compensator are fabricated simultaneously using simple, solid state components.
Inventors
- 👤 John W. Hardy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:44
CPC Classifications
G; G01; G01J; G01J9/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
157 words
An integrated wavefront compensator, comprising: a. optical imaging means for dividing an input wavefront into a plurality of subapertures and for forming a separate wavefront image for each subaperture, whereby the local wavefront slope across each subaperture causes the position of the subaperture image to be displaced in x and y in dependence upon the x and y local wavefront slope across the subaperture; b. means for transforming each separate wavefront image for each subaperture into a correspondingly imaged photoelectron charge pattern; c. an array of electrical nodes, positioned opposite said photoelectron charge pattern, for capacitively sensing the local electrical fields established by the position of the charge pattern; and d. an active mirror having the input wavefront incident thereon and being electrically coupled to said array of electrical nodes and responsive to the sensed position of the charge pattern indicated thereby for selectively deforming a reflective surface to compensate for phase distortions in the input wavefront.
Claim 2
Dependent Claim
157 words
An integrated wavefront compensator, comprising: a. optical imaging means for dividing an input wavefront into a plurality of subapertures and for forming a separate wavefront image for each subaperture, whereby the local wavefront slope across each subaperture causes the position of the subaperture image to be displaced in x and y in dependence upon the x and y local wavefront slope across the subaperture; b. means for transforming each separate wavefront image for each subaperture into a correspondingly imaged photoelectron charge pattern; c. an array of electrical nodes, positioned opposite said photoelectron charge pattern, for capacitively sensing the local electrical fields established by the position of the charge pattern; and d. an active mirror having the input wavefront incident thereon and being electrically coupled to said array of electrical nodes and responsive to the sensed position of the charge pattern indicated thereby for selectively deforming a reflective surface to compensate for phase distortions in the input wavefront.
Claim 3
Dependent Claim
40 words
An integrated wavefront compensator as claimed in claim 1, said transforming means including an image intensifier means having the wavefront images for the subapertures incident on a photocathode face and producing a corresponding photoelectron charge pattern on a photoanode face.
Claim 4
Dependent Claim
60 words
An integrated wavefront compensator as claimed in claim 1, said array of electrical nodes being positioned on an insulating layer and being spaced thereby from a conductive layer which is spaced from said photoelectron charge pattern such that the charge pattern is capacitively coupled to said conductive layer which is, in turn, capacitively coupled to said array of electrical nodes.
Claim 5
Dependent Claim
29 words
An integrated wavefront compensator as claimed in claim 3, said insulating layer being supported by a substrate, and said conducting layer being positioned on top of said insulating layer.
Claim 6
Dependent Claim
38 words
An integrated wavefront compensator as claimed in claim 4, including a resistive network formed on said substrate on the surface opposite the substrate surface supporting said insulating layer, said resistive network electrically interconnecting said array of electrical nodes.
Claim 7
Dependent Claim
25 words
An integrated wavefront compensator as claimed in claim 1 or 2 or 3, including a resistive network array electrically interconnecting said array of electrical nodes.
Claim 8
Dependent Claim
44 words
An integrated wavefront compensator as claimed in claim 1 or 2 or 3, said array of electical nodes including an array of four electrical nodes for each subaperture which are positioned symmetrically around the focal point of a plane wave incident upon the subaperture.
Claim 9
Dependent Claim
36 words
An integrated wavefront compensator as claimed in claim 1 or 2 or 3, said optical imaging means including an array of lenses upon which an input wavefront is incident, such that each lens defines a subaperture.
Claim 10
Dependent Claim
66 words
An integrated wavefront compensator as claimed in claim 1 or 2 or 3, including a vacuum evacuated transparent housing encompassing said transforming means, said array of electrical nodes and said active mirror, such that the transforming means is responsive to light incident thereon through one face of the transparent housing and the active mirror reflects light incident thereon through a second face of the transparent housing.
Claim 11
Dependent Claim
33 words
An integrated wavefront compensator as claimed in claim 9, said optical imaging means including an array of lenses, upon which an input wavefront is incident, positioned outside and adjacent to said transparent housing.
References Cited (Backward Citations)
US3230380A
Cited
US3441741A
Cited
US3773401A
Cited
US3698010A
Cited
US3829219A
Cited
US3904274A
Cited
US3923400A
Cited
US3957376A
Cited
US3937580A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-18 | 1988-03-19 | 1988-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-18 | 1992-03-19 | 1992-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-18 | 1996-03-19 | 1996-09-18 | $7700.00 | Window Closed / Lapsed |