EP0144224A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Hologram scanner
Assignee: Fujitsu Ltd
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Filing: 1984-11-30
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Granted: —
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Expires: 2004-11-30
Abstract
Abstract A hologram scanner (30) comprising: a laser source (22); a rotary body (28) having a rotational axis (21); at least one hologram facet (24) arranged on the rotary body (28) for diffracting a laser beam from the laser source to scan an objective (e.g. bar code) and receiving the scattered light from the objective for detection thereof; a motor means (25) for driving the rotary body; and, an optical detector (29) for detecting the scattered light received and diffracted by the hologram facet (24). The hologram facet is inclined with respect to the rotational axis (21) of the rotary body.
Inventors
- 👤 Kozo Yamazaki
- 👤 Fumio Yamagishi
- 👤 Hiroyuki Ikeda
- 👤 Takefumi Inagaki
- 👤 Ichiro Sebata
- 👤 Shunji Kitagawa
- 👤 Masayuki Kato
- 👤 Toshiyuki Ichikawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 18:03
CPC Classifications
G; G02; G02B; G02B26/00; G02B26/08; G02B26/10; G06; G06K; G06K7/00; G06K7/10; G06K7/10544; G06K7/10821; G06K7/10861; G06K7/10871; G02B26/106
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
124 words
A hologram scanner comprising: a laser source (22); a rotary body (28) having a rotational axis; at least one hologram facet (24, 44, 45, 53, 54, 55, 56, 62, 64, 65a, 67a) arranged on said rotary body (28) for diffracting a laser beam from said laser source (22) to scan an objective and receiving the scattered light from said objective for detection thereof; a motor means (25, 76, 77, 79, 80) for driving said rotary body (28); and, an optical detector (29) for detecting the scattered light received and diffracted by said hologram facet, characterized in that said hologram facet (24, 44, 45, 53, 54, 55, 56, 62, 64, 65a, 67a) is inclined with respect to said rotational axis of said rotary body (28).
Claim 2
Dependent Claim
124 words
A hologram scanner comprising: a laser source (22); a rotary body (28) having a rotational axis; at least one hologram facet (24, 44, 45, 53, 54, 55, 56, 62, 64, 65a, 67a) arranged on said rotary body (28) for diffracting a laser beam from said laser source (22) to scan an objective and receiving the scattered light from said objective for detection thereof; a motor means (25, 76, 77, 79, 80) for driving said rotary body (28); and, an optical detector (29) for detecting the scattered light received and diffracted by said hologram facet, characterized in that said hologram facet (24, 44, 45, 53, 54, 55, 56, 62, 64, 65a, 67a) is inclined with respect to said rotational axis of said rotary body (28).
Claim 3
Dependent Claim
28 words
A hologram scanner according to claim 1, characterized in that a wedge shaped portion is formed by two hologram facets at the end of a cylindrical rotary body.
Claim 4
Dependent Claim
24 words
A hologram scanner according to claim 1, characterized in that three or more hologram facets form a pyramid at an end of a cylinder.
Claim 5
Dependent Claim
25 words
A hologram scanner according to claim 1, characterized in that three or more hologram facets form a pyramid at an end of a polygonal pillar.
Claim 6
Dependent Claim
23 words
A hologram scanner according to claim 1, characterized in that one inclined hologram facet is disposed at an end of a cylindrical body.
Claim 7
Dependent Claim
30 words
A hologram scanner according to any of claims 1 to 5, characterized in that said hologram facet comprises at least two hologram facet elements (24a, 24b) having different diffraction directions.
Claim 8
Dependent Claim
27 words
A hologram scanner according to any preceding claim, characterized in that the Bragg plane of a hologram of said hologram facet is perpendicular to the hologram surface.
Claim 9
Dependent Claim
31 words
A hologram scanner according to any preceding claim, characterized in that said rotary body (28) comprises a means for changing the incidence point of the laser beam on said hologram facet.
Claim 10
Dependent Claim
22 words
A hologram scanner according to any preceding claim, characterized in that said rotary body (28) constitutes a rotor of said motor means.
Claim 11
Dependent Claim
42 words
A hologram scanner according to claim 9, characterized in that said rotary body is rotatably attached to a hollow shaft (79) which constitutes a stator of said motor means and electric lines (83, 84, 85) are disposed through said hollow shaft (79).
Claim 12
Dependent Claim
34 words
A hologram scanner according to any preceding claim, characterized in that a rotary shaft (21) of said rotary body (28) is disposed within the inside of said rotary body along the full length thereof.
Claim 13
Dependent Claim
28 words
A hologram scanner according to any preceding claim, characterized in that an optical means (86, 86') for condensing the scattered light is disposed behind said hologram facet (24).
Claim 14
Dependent Claim
45 words
A hologram scanner according to any preceding claim, characterized in that the laser beam (52) is introduced into said rotary body (28) through an opening (108) at an end of said rotary body, reflected within said rotary body and emitted therefrom through said hologram facet.
Claim 15
Dependent Claim
51 words
A hologram scanner according to any of claims 1 to 12 , characterized in that the laser beam (52) is introduced into said rotary body (28) through said hologram facet (24), penetrating straight therethrough, reflected within said rotary body and emitted therefrom through said hologram facet, being diffracted by the facet.
Claim 16
Dependent Claim
41 words
A hologram scanner according to any of claims 1 to 12,characterized in that the laser beam (52) is introduced into said rotary body (28) through its side wall (96), reflected within said rotary body, and emitted therefrom through said hologram facet.
Claim 17
Dependent Claim
30 words
A hologram scanner according to any preceding claim, characterized in that a hologram for condensing the scattered light is formed on a side wall (98) of said rotary body (28).
Claim 18
Dependent Claim
32 words
A hologram scanner according to any preceding claim, characterized in that a converging point of the scattered light is positioned at an- opening (99) at the end of said rotary body (28).
Claim 19
Dependent Claim
29 words
A hologram scanner according to any of claims 1 to 9, characterized in that the laser beam (52) passes through a hollow shaft (105) of the rotary body (28).
Claim 20
Dependent Claim
29 words
A hologram scanner according to any preceding claim, characterized in that the laser beam is emitted from the rotary body, in a direction perpendicular to the rotational axis thereof.
Claim 21
Dependent Claim
46 words
A hologram scanner according to any preceding claim, characterized in that the motor means (25, 76, 77, 79, 80), the rotary body (28), the laser source (22), and the optical detector (29) are mounted on one common frame so as to constitute one scanning module (30).
Claim 22
Dependent Claim
20 words
A hologram scanner according to claim 20, characterized in that said scanning module (30) is installed in a bar-code reader.
Claim 23
Dependent Claim
21 words
A hologram scanner according to any preceding claim, characterized in that the inclination angle of said hologram facet is 45 degrees.
References Cited (Backward Citations)
No citation records indexed.
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