US3635540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Holography with surface waves
Assignee: Agfa Gevaert AG
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Filing: 1969-09-02
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Granted: 1972-01-18
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Expires: 1989-09-02
Abstract
Abstract A process for the production of holograms wherein only one information carrying spatial frequency is used for recording by simultaneous exposure of a light-sensitive recording material to an imagewise modulated coherent object beam and one coherent reference beam. Further a process for the reconstruction of the hologram wherein the reference beam is the inhomogeneous surface beam which is created on total reflection in the optically thinner medium of the recording layer. The holograms obtained by the process can be used for the production of semiconductor microcircuit images.
Inventors
- 👤 Heinrich Nassenstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:43
CPC Classifications
G; G03; G03H; G03H1/00; G03H1/04; G03H1/0402; G03H1/0408; G03H1/0005; G03H2001/0094; G03H2001/0413; G03H2001/0415; G03H2222/00; G03H2222/40; G03H2222/47; G03H2223/00; G03H2223/25; G03H2260/00; G03H2260/16
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
24 words
The process as claimed in claim 1 wherein the optical medium having the higher refractive index is a transparent support for the light-sensitive material.
Claim 2
Dependent Claim
14 words
The process as claimed in claim 2 wherein the optical medium is a prism.
Claim 3
Dependent Claim
21 words
The process as claimed in claim 2 wherein the light-sensitive material on the transparent support is a silver halide emulsion layer.
Claim 4
Dependent Claim
42 words
The process as claimed in claim 1 wherein a transparent body adjacent to but spaced from the light-sensitive layer receives and passes the beams and the optical medium is a transparent liquid material filling the space between the body and the layer.
Claim 5
Dependent Claim
14 words
The process as claimed in claim 5 wherein the transparent body is a prism.
Claim 6
Dependent Claim
13 words
A hologram in a light-sensitive material produced by the process of claim 1.
Claim 7
Dependent Claim
14 words
The process of claim 1 wherein the light-sensitive material is a silver halide emulsion.
Claim 8
Dependent Claim
28 words
In the process of claim 1 the step of controlling the depth of the hologram in the layer of the light-sensitive material by controlling said angle of incidence.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |