US4895434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for 3-D measurement using holographic scanning
Assignee: RVSI Inspection LLC
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Filing: 1988-03-24
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Granted: 1990-01-23
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Expires: 2008-03-24
Abstract
Abstract A 3-D measurement system utilizing a holographic scanner is provided with beam direction compensation means for compensating for changes in angular deflection of the scanner and further means is provided for synchronizing the scanner diffraction segments with the camera imaging mechanism of the 3-D system as well as for providing multiple offsets of the projected beam.
Inventors
- 👤 Howard K. Stern
- 👤 Joel Hecker
- 👤 Peter Calabrese
- 👤 Richard Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:34
CPC Classifications
G; G02; G02B; G02B26/00; G02B26/08; G02B26/10; G02B26/106; G01; G01B; G01B11/00; G01B11/24; G01B11/2441; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
111 words
A method of offsetting the path of a radiant energy beam to multiple paths with a relatively few glass plates comprising: inserting a first glass plate at a predetermined angle into said radiant energy beam, to offset said beam to a first offset path; removing said first glass plate and inserting a second glass plate at said predetermined angle into said beam to offset said beam to a second offset path, said second glass plate being twice as thick as said first glass plate; and inserting said first glass plate with said second glass plate at said predetermined angle into said beam to offset said beam to a third offset path.
Claim 2
Independent Claim
111 words
A method of offsetting the path of a radiant energy beam to multiple paths with a relatively few glass plates comprising: inserting a first glass plate at a predetermined angle into said radiant energy beam, to offset said beam to a first offset path; removing said first glass plate and inserting a second glass plate at said predetermined angle into said beam to offset said beam to a second offset path, said second glass plate being twice as thick as said first glass plate; and inserting said first glass plate with said second glass plate at said predetermined angle into said beam to offset said beam to a third offset path.
Claim 3
Dependent Claim
39 words
A method in accordance with claim 1 further comprising: continuing said method for N glass plates, with each successive plate being twice as thick as the immediately preceding plate to offset said beam to 2 N -1 offset paths.
Claim 4
Independent Claim
81 words
A method of offsetting the path of a radiant energy beam to multiple paths with a single glass plate having at least one step thickness change comprising: interposing by translating at a predetermined angle the thinnest step of said plate into said beam to offset said beam to a first offset path; translating said glass plate at said predetermined angle to bring the next thinnest step of said plate into said beam to offset said beam to a second offset path.
Claim 5
Independent Claim
81 words
A method of offsetting the path of a radiant energy beam to multiple paths with a single glass plate having at least one step thickness change comprising: interposing by translating at a predetermined angle the thinnest step of said plate into said beam to offset said beam to a first offset path; translating said glass plate at said predetermined angle to bring the next thinnest step of said plate into said beam to offset said beam to a second offset path.
Claim 6
Dependent Claim
34 words
A method in accordance with claim 3 further comprising: said plate having N steps; and continuing said method to translate all N steps into said beam to offset said beam to N offset paths.
References Cited (Backward Citations)
US3485552A
Cited
US4641038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-22 | 1993-07-24 | 1994-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-22 | 1997-07-24 | 1998-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-22 | 2001-07-24 | 2002-01-23 | $7700.00 | Window Closed / Lapsed |