Patent CH304836A successfully refreshed from Google Patents.
Patent US446063A successfully refreshed from Google Patents.
Patent US3825747A successfully refreshed from Google Patents.
US3825747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scanner
Assignee: Allen Bradley Co LLC
•
Filing: 1973-05-21
•
Granted: 1974-07-23
•
Expires: 1993-05-21
Abstract
Abstract Scanning apparatus in which a sensor is mounted within a transceiver casing and a single focusing means both forms a beam from a radiation source for delivery to a target and focuses a returned beam onto the sensor. A forward looking reflective surface is included in the path of one of the beams, causing that beam to be twice passed through the focusing means. The sensor faces the radiation source, thus avoiding the need for a separate lens for the returned radiation. The scanner is particularly useful in detecting retro-reflective targets.
Inventors
- 👤 E Thomson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:07
CPC Classifications
G; G02; G02B; G02B26/00; G02B26/08; G02B26/10; G01; G01N; G01N21/00; G01N21/17; G01N21/55; G01S; G01S7/00; G01S7/48; G01S7/481; G01S7/4811; G01S7/4812
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
120 words
A scanner comprising: a. a radiation source; b. a radiation sensor mounted facing said radiation source; c. focusing means mounted between said radiation source and radiation sensor, a member mounted on the rear of the focusing means and shading said sensor from direct illumination by said source, said member having a forward facing reflective surface, said focusing means directing an outgoing beam from said source towards a target in front of said focusing means, said focusing means adapted to focus onto said sensor a beam reflected back from a target and incident on said focusing means at points not occupied by said outgoing beam, and said forward facing reflective surface being disposed in the path of one of said beams.
Claim 2
Dependent Claim
120 words
A scanner comprising: a. a radiation source; b. a radiation sensor mounted facing said radiation source; c. focusing means mounted between said radiation source and radiation sensor, a member mounted on the rear of the focusing means and shading said sensor from direct illumination by said source, said member having a forward facing reflective surface, said focusing means directing an outgoing beam from said source towards a target in front of said focusing means, said focusing means adapted to focus onto said sensor a beam reflected back from a target and incident on said focusing means at points not occupied by said outgoing beam, and said forward facing reflective surface being disposed in the path of one of said beams.
Claim 3
Dependent Claim
17 words
A scanner according to claim 1 useful in the detection of a target having a retro-reflective surface.
Claim 4
Dependent Claim
22 words
A scanner according to claim 1 wherein said focusing means is adapted to form an outgoing beam having an unoccupied central portion.
Claim 5
Dependent Claim
54 words
A scanner according to claim 1, wherein said source is to the rear of said focusing means, said sensor is in front of said focusing means, and the cross-sectional area occupied by said outgoing beam is substantially equal to the cross-sectional area of said focusing means excluding the cross-sectIonal area of said shading member.
Claim 6
Dependent Claim
45 words
A scanner according to claim 1 wherein said source is in front of said focusing means, said sensor is to the rear of said focusing means, and the cross-sectional area occupied by said outgoing beam is substantially equal to the area of said reflective surface.
Claim 7
Dependent Claim
14 words
A scanner according to claim 1 wherein said focusing means is a plano-convex lens.
Claim 8
Dependent Claim
112 words
A scanner for casting radiation forward onto a target and sensing radiation reflected back from the target comprising: a. a light source; b. a plano-convex lens mounted in a casing approximately a focal length of said lens in front of said source; c. a light sensor mounted in said casing approximately one-half focal length of said lens in front of said lens; and d. a member on the rear of said lens having an opaque rear surface shading said sensing unit from said light source, said member also having a reflective front surface for reflecting a portion of the light returned from a target back through said lens onto said sensing unit.
Claim 9
Dependent Claim
112 words
A scanner for casting radiation forward onto a target and sensing radiation reflected back from the target comprising: a. a light source; b. a plano-convex lens mounted in a casing approximately a focal length of said lens in front of said source; c. a light sensor mounted in said casing approximately one-half focal length of said lens in front of said lens; and d. a member on the rear of said lens having an opaque rear surface shading said sensing unit from said light source, said member also having a reflective front surface for reflecting a portion of the light returned from a target back through said lens onto said sensing unit.
Claim 10
Dependent Claim
22 words
A scanner according to claim 7 wherein said light sensor is mounted on a transparent plate at the front of the casing.
Claim 11
Dependent Claim
22 words
A scanner according to claim 7, including a plurality of discrete members on the rear of said lens having reflective front surfaces.
Claim 12
Dependent Claim
38 words
A scanner according to claim 7 wherein said member is a semi-transparent mirror for transmitting light from said source to a target and for reflecting light returned from a target back through said lens onto said light sensor.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |