US4589738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for projecting a laser beam in a linear pattern
Assignee: Individual
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Filing: 1983-11-04
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Granted: 1986-05-20
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Expires: 2003-11-04
Abstract
Abstract An apparatus for projecting a laser beam linearly on an object, wherein a laser beam, once spread radially by a convex reflector or by a concave lens, is made to converge linearly by means of a cylindrical-concave reflector. The line of light obtained on an object by the apparatus disclosed herein is a constant and non-flickering one, being unlike that obtained by a conventional apparatus which reflects a laser beam by means of a rapidly rotating polygonal-prismatic mirror to give an apparent line of light on an object. The present invention can be embodied so as to give various patterns of lines by making the cylindrical-concave reflector have a plurality of cylindrical-concave reflective surfaces.
Inventors
- 👤 Yasuto Ozaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:25
CPC Classifications
G; G02; G02B; G02B17/00; G02B19/00; G02B19/0004; G02B19/0019; G02B19/0023; G02B19/0028; G02B19/0033; G02B19/0047; G02B27/00; G02B27/18
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
157 words
An apparatus for projecting a laser beam linearly on an object to be measured, said apparatus comprising: means for generating a laser beam with generatrices; a convex reflector means for scattering the laser beam radially into a plurality of luminous lines; a reflector, positioned between the generating means and the convex reflector means, said reflector having at least one cylindrical-concave reflective surface, such that it causes the plurality of luminous lines to converge along a common line of light on the object in a direction perpendicular to the generatrices of the laser beam; and path means, arranged in the reflector having at least one cylindrical-concave reflective surface, for allowing the laser beam to proceed from the generating means through the reflector to the convex reflector means for scattering the laser beam radially; whereby a predetermined optical image is cast on the object to be measured by the common continuous line of light which is constant and nonflickering.
Claim 2
Independent Claim
157 words
An apparatus for projecting a laser beam linearly on an object to be measured, said apparatus comprising: means for generating a laser beam with generatrices; a convex reflector means for scattering the laser beam radially into a plurality of luminous lines; a reflector, positioned between the generating means and the convex reflector means, said reflector having at least one cylindrical-concave reflective surface, such that it causes the plurality of luminous lines to converge along a common line of light on the object in a direction perpendicular to the generatrices of the laser beam; and path means, arranged in the reflector having at least one cylindrical-concave reflective surface, for allowing the laser beam to proceed from the generating means through the reflector to the convex reflector means for scattering the laser beam radially; whereby a predetermined optical image is cast on the object to be measured by the common continuous line of light which is constant and nonflickering.
Claim 3
Dependent Claim
25 words
The apparatus, as defined in claim 1, wherein: said path means is a hole extending through the reflector having at least one cylindrical-concave reflective surface.
Claim 4
Dependent Claim
39 words
The apparatus, as defined in claim 1, further comprising: a bundle of optical fibers, positioned between the generating means and the convex reflector means, whereby the laser beam is led from the generating means toward the convex reflector means.
Claim 5
Dependent Claim
30 words
The apparatus, as defined in claim 1, wherein: said reflector has two cylindrical-concave reflective surfaces arranged such that the predetermined optical image cast on the object is a crisscross pattern.
Claim 6
Dependent Claim
30 words
The apparatus, as defined in claim 1, wherein: said reflector has two cylindrical-concave reflective surfaces arranged such that the predetermined optical image cast on the object is a T-shaped pattern.
Claim 7
Dependent Claim
31 words
The apparatus, as defined in claim 1, wherein: said reflector has four cylindrical-concave reflective surfaces arranged with such that the predetermined optical image cast on the object is a parallel-cross pattern.
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) | 1989-05-19 | 1989-11-18 | 1990-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-19 | 1993-11-18 | 1994-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-19 | 1997-11-18 | 1998-05-20 | $7700.00 | Window Closed / Lapsed |