US3601466A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for detecting an aberration-compensated image
Assignee: Nikon Corp
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Filing: 1969-06-09
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Granted: 1971-08-24
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Expires: 1989-06-09
Abstract
Abstract This invention relates to a method for sharply detecting an image which comprises, preparing a hologram with an aberrationfree wave front and an aberration wave front, illuminating the hologram with a wave front produced as a result of removing only the change in light path length caused by a phenomenon to be measured or of adding newly the change in the light path length from or to the aberration front, and effecting filtering such as the schlieren method or phase difference method at the focus of the aberration-free wave front against the change in the wave front caused by the phenomenon and superimposed on the aberration-free wave front.
Inventors
- 👤 Tadao Tsuruta
- 👤 Yoshinobu Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:45
CPC Classifications
G; G03; G03H; G03H1/00; G02; G02B; G02B27/00; G02B27/50; G02B5/00; G02B5/32
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
192 words
A method for eliminating the effects of aberrations introduced into an optical system for detecting an object using a single coherent light source, the aberrations resulting from a cell containing the object and from imperfections of the optical system itself, comprising the steps of: splitting light from said source into an object beam which is directed through the cell onto a film positioned within the system and into a reference beam which is passed directly onto the film along a path angularly displaced with respect to the object beam, the cell having an empty state and another state containing the object, said reference beam comprising an aberration free wave front; exposing the film with the cell in one state; developing the film; restoring the developed film into essentially the same position within the optical system; placing the cell into the other state; reconstructing the reference beam by passing light from said coherent source through the object beam path only; focusing with a lens the reconstructed beam in the rear focal plane of said lens; and spatially filtering the reconstructed beam in said plane at the focal point of the reconstructed reference beam.
Claim 2
Independent Claim
192 words
A method for eliminating the effects of aberrations introduced into an optical system for detecting an object using a single coherent light source, the aberrations resulting from a cell containing the object and from imperfections of the optical system itself, comprising the steps of: splitting light from said source into an object beam which is directed through the cell onto a film positioned within the system and into a reference beam which is passed directly onto the film along a path angularly displaced with respect to the object beam, the cell having an empty state and another state containing the object, said reference beam comprising an aberration free wave front; exposing the film with the cell in one state; developing the film; restoring the developed film into essentially the same position within the optical system; placing the cell into the other state; reconstructing the reference beam by passing light from said coherent source through the object beam path only; focusing with a lens the reconstructed beam in the rear focal plane of said lens; and spatially filtering the reconstructed beam in said plane at the focal point of the reconstructed reference beam.
Claim 3
Dependent Claim
27 words
A method as in claim 1 wherein said filtering step comprises placing a knife edge in the focal plane at the focus of the reconstructed reference beam.
Claim 4
Dependent Claim
23 words
A method as in claim 1 wherein said filtering step comprises placing a phase plate at the focus of the reconstructed reference beam.
References Cited (Backward Citations)
US2655074A
Cited
US3501216A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |