US4026630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scanning apparatus using holographic beam deflector
Assignee: International Business Machines Corp
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Filing: 1975-12-23
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Granted: 1977-05-31
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Expires: 1995-12-23
Abstract
Abstract An omnidirectional scanning apparatus which generates a multiple cross scanning pattern is described. The scanning apparatus comprises a flat ring-shaped hologram. The hologram disk is rotated about its axis as a small area is illuminated by a collimated light source, such as a laser, to produce a series of reconstructed beams which scan segments of a circle. Optical means is provided to intercept the reconstructed beams and reflect them to a scanning window where the segments produce a multiple cross scanning pattern. In a specific embodiment the holograms recorded are reconstructed as segments of concentric circles and the optical means comprises a stationary mirror for each direction of scan across the scanning window.
Inventors
- 👤 Hans Peter Wollenmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:53
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/10; G06K7/10544; G06K7/10821; G06K7/10861; G06K7/10871; G02; G02B; G02B26/00; G02B26/08; G02B26/10; G02B26/106
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
189 words
An omnidirectional scanning system for scanning bar coded labels on randomly oriented articles comprising: an elongated scanning window; a disk member having a plurality of hologram segments recorded thereon, each of said hologram segments, when reconstructed, producing a point image, each of said reconstructed hologram segments producing different points in a plane which is parallel to the plane containing said hologram segments; a collimated light source providing a beam of light directed to illuminate a small area of said hologram segments; means for rotating said disk member about its axis so that each hologram segment on said disk member, when illuminated, produces a reconstructed point image which scans a circular arc; first optical means fixed in a position to intercept the reconstructed beam from one of said holograms and to reflect the intercepted beam to said scanning window to produce a first scanning segment; and second optical means fixed in a position to intercept the reconstructed beam from another of said holograms and to reflect the intercepted beam to said scanning window to produce a second scanning segment intersecting the first scanning segment to produce a cross scanning pattern.
Claim 2
Dependent Claim
189 words
An omnidirectional scanning system for scanning bar coded labels on randomly oriented articles comprising: an elongated scanning window; a disk member having a plurality of hologram segments recorded thereon, each of said hologram segments, when reconstructed, producing a point image, each of said reconstructed hologram segments producing different points in a plane which is parallel to the plane containing said hologram segments; a collimated light source providing a beam of light directed to illuminate a small area of said hologram segments; means for rotating said disk member about its axis so that each hologram segment on said disk member, when illuminated, produces a reconstructed point image which scans a circular arc; first optical means fixed in a position to intercept the reconstructed beam from one of said holograms and to reflect the intercepted beam to said scanning window to produce a first scanning segment; and second optical means fixed in a position to intercept the reconstructed beam from another of said holograms and to reflect the intercepted beam to said scanning window to produce a second scanning segment intersecting the first scanning segment to produce a cross scanning pattern.
Claim 3
Dependent Claim
53 words
The scanning system according to claim 1 additionally comprising third optical means fixed in a position to intercept the reconstructed beam from a third of said plurality of holograms and to reflect the intercepted beam to said scanning window to produce a third scanning segment intersecting said first and said second scanning segments.
Claim 4
Dependent Claim
36 words
The scanning system of claim 2 wherein said first and said second optical means each intercept a plurality of said reconstructed beams so that a plurality of cross scanning patterns is produced on said scanning window.
Claim 5
Dependent Claim
49 words
The scanning system of claim 3 wherein the hologram segments to produce a complete scanning pattern on said scanning window are repeated a plurality of times on said disk member so that the entire scanning pattern is produced a plurality of times for each revolution of said disk member.
Claim 6
Dependent Claim
36 words
The scanning system of claim 1 wherein said first and said second optical means each intercept a plurality of said reconstructed beams so that a plurality of cross scanning patterns is produced on said scanning window.
Claim 7
Dependent Claim
14 words
The scanning system in claim 1 wherein said collimated light source is a laser.
Claim 8
Dependent Claim
32 words
The scanning system of claim 1 wherein said plurality of hologram segments recorded on said disk member comprises one hologram segment for each of said scanning segments produced on said scanning window.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-30 | 1980-11-29 | 1981-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-30 | 1984-11-29 | 1985-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-30 | 1988-11-29 | 1989-05-31 | $7700.00 | Window Closed / Lapsed |