US4540247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hologram scanner
Assignee: Mitsubishi Electric Corp
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Filing: 1982-06-21
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Granted: 1985-09-10
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Expires: 2002-06-21
Abstract
Abstract A hologram scanner includes a rotatable hologram disk on which a plurality of hologram lenses are arranged circumferentially, and a light beam guide mechanism for successively shifting irradiation regions in a predetermined direction with respect to the direction of rotation of the hologram disk, to apply a light beam successively to the hologram lenses on the hologram disk, so that the scanning of a reading window with the light beam is effected in all directions with high density. The hologram scanner is employable as a bar code reading device in a POS or UPC system.
Inventors
- 👤 Kazuro Nishi
- 👤 Koichiro Kurahashi
- 👤 Tsutomu Hashimoto
- 👤 Toshihiko Senoo
- 👤 Shinji Yamato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:45
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/10; G06K7/10544; G06K7/10821; G06K7/10861; G06K7/10871; G02; G02B; G02B5/00; G02B5/32
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
135 words
A hologram scanner, comprising; a hologram disk including a plurality of hologram lenses arranged circumferentially thereon; means for rotating said hologram disk; rotating light beam guide means for successively shifting irradiation regions in a direction with respect to the direction of rotation of said hologram disk, to successively apply a light beam to said hologram lenses on said hologram disk, said rotating light beam guide means having a rotational speed different from the rotational speed of said hologram disk and a rotational direction opposite to that of said light beam guide means; and a reading window for reading an object to which said light beam is applied through said hologram lens; wherein a radial raster pattern having parallel scan lines is defined having a number of scan lines equal to the number of hologram lenses.
Claim 2
Dependent Claim
135 words
A hologram scanner, comprising; a hologram disk including a plurality of hologram lenses arranged circumferentially thereon; means for rotating said hologram disk; rotating light beam guide means for successively shifting irradiation regions in a direction with respect to the direction of rotation of said hologram disk, to successively apply a light beam to said hologram lenses on said hologram disk, said rotating light beam guide means having a rotational speed different from the rotational speed of said hologram disk and a rotational direction opposite to that of said light beam guide means; and a reading window for reading an object to which said light beam is applied through said hologram lens; wherein a radial raster pattern having parallel scan lines is defined having a number of scan lines equal to the number of hologram lenses.
Claim 3
Dependent Claim
32 words
A hologram scanner as claimed in claim 1, in which said light beam guide means comprises a rotary disk and means for turning said disk, and mirror means associated with said disk.
Claim 4
Dependent Claim
72 words
A hologram scanner as claimed in claim 2, said mirror means comprising a first mirror provided at the center of said rotary disk in a manner so as to turn together with said rotary disk; and a second mirror provided at a peripheral portion of said rotary disk, said light beam being introduced via said first and second mirrors to predetermined ones of said hologram lenses by rotation of said rotary disk.
Claim 5
Dependent Claim
23 words
A hologram scanner as claimed in claim 3, said first and second mirrors being fixed to said rotary disk in predetermined angular orientations.
Claim 6
Dependent Claim
21 words
A hologram scanner as claimed in claim 3, said rotary disk and said hologram disk rotating about the same rotary axis.
Claim 7
Dependent Claim
151 words
A hologram scanner, comprising; a hologram disk including a plurality of hologram lenses arranged circumferentially thereon; means for rotating said hologram disk; rotating light beam guide means for successively shifting irradiation regions in a direction with respect to the direction of rotation of said hologram disk, to successively apply a light beam to said hologram lenses on said hologram disk, said rotating light beam guide means having a rotational speed different from the rotational speed of said hologram disk and a rotational direction opposite to that of said light beam guide means; and a reading window for reading an object to which said light beam is applied through said hologram lens; wherein a radial raster pattern having parallel scan lines is defined by a variable number of scanning line directions which are a function of the ratio rotation speed of the hologram disk to that of said light beam guide means.
Claim 8
Dependent Claim
151 words
A hologram scanner, comprising; a hologram disk including a plurality of hologram lenses arranged circumferentially thereon; means for rotating said hologram disk; rotating light beam guide means for successively shifting irradiation regions in a direction with respect to the direction of rotation of said hologram disk, to successively apply a light beam to said hologram lenses on said hologram disk, said rotating light beam guide means having a rotational speed different from the rotational speed of said hologram disk and a rotational direction opposite to that of said light beam guide means; and a reading window for reading an object to which said light beam is applied through said hologram lens; wherein a radial raster pattern having parallel scan lines is defined by a variable number of scanning line directions which are a function of the ratio rotation speed of the hologram disk to that of said light beam guide means.
Claim 9
Dependent Claim
32 words
A hologram scanner as claimed in claim 6, in which said light beam guide means comprises a rotary disk and means for turning said disk, and mirror means associated with said disk.
Claim 10
Dependent Claim
72 words
A hologram scanner as claimed in claim 7, said mirror means comprising a first mirror provided at the center of said rotary disk in a manner so as to turn together with said rotary disk; and a second mirror provided at a peripheral portion of said rotary disk, said light beam being introduced via said first and second mirrors to predetermined ones of said hologram lenses by rotation of said rotary disk.
Claim 11
Dependent Claim
23 words
A hologram scanner as claimed in claim 8, said first and second mirrors being fixed to said rotary disk in predetermined angular orientations.
Claim 12
Dependent Claim
21 words
A hologram scanner as claimed in claim 8, said rotary disk and said hologram disk rotating about the same rotary axis.
References Cited (Backward Citations)
US3619033A
Cited
US4165464A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-09 | 1989-03-11 | 1989-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-09 | 1993-03-11 | 1993-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-09 | 1997-03-11 | 1997-09-10 | $7700.00 | Window Closed / Lapsed |