US4521087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical system with diffuser for transformation of a collimated beam into a self-luminous arc with required curvature and numerical aperture
Assignee: International Business Machines Corp
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Filing: 1983-05-23
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Granted: 1985-06-04
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Expires: 2003-05-23
Abstract
Abstract Apparatus for producing a line source of a desired shape from a light source such as an excimer laser comprising means for directing the light source along a predetermined path to a cylindrical lens positioned to produce a virtual line image having uniform intensity along its length at a first location. However, the image is intercepted by a cylindrical mirror inclined at an angle so that the beam is transformed into a curved shape and directed onto a quartz diffuser. This apparatus produces a curved self-luminous distribution having uniform intensity over its length. In a specific embodiment, the diffuser is a directional diffuser.
Inventors
- 👤 Lawrence P. Hayes, deceased
- 👤 administratrix by Ellen J. Hayes
- 👤 Kantilal Jain
- 👤 Randall T. Kerth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:48
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/70; G03F7/70216; B; B23; B23K; B23K26/00; B23K26/02; B23K26/06; B23K26/073; B23K26/0738; G02; G02B; G02B19/00; G02B19/0004; G02B19/0028; G02B19/0033; G02B19/0047; G02B19/0095; G03F7/70058; G02B27/00; G02B27/09; G02B27/0911; G02B27/0938; G02B27/095; G02B27/0955; G02B27/0977
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
128 words
Apparatus for producing a curved line source of a desired shape from a collimated light source comprising a source for producing a large area substantially collimated light beam and means for directing light from said source along a predetermined path; first optical means along said predetermined path to direct light toward a virtual line image at a first predetermined location; second optical means interposed between said first optical means and said first predetermined location to produce an arc shaped beam and to direct said beam to a second location; and third optical means comprising a diffuser fixed at said second location to receive said arc shaped beam whereby impingement of said beam upon said third optical means produces a continuous self-luminous curved line source of a desired shape.
Claim 2
Dependent Claim
128 words
Apparatus for producing a curved line source of a desired shape from a collimated light source comprising a source for producing a large area substantially collimated light beam and means for directing light from said source along a predetermined path; first optical means along said predetermined path to direct light toward a virtual line image at a first predetermined location; second optical means interposed between said first optical means and said first predetermined location to produce an arc shaped beam and to direct said beam to a second location; and third optical means comprising a diffuser fixed at said second location to receive said arc shaped beam whereby impingement of said beam upon said third optical means produces a continuous self-luminous curved line source of a desired shape.
Claim 3
Dependent Claim
14 words
The apparatus of claim 1 wherein said first optical means comprises a cylindrical lens.
Claim 4
Dependent Claim
22 words
The apparatus of claim 1 wherein said second optical means comprises a cylindrical mirror inclined at an angle to said predetermined path.
Claim 5
Dependent Claim
12 words
The apparatus of claim 1 wherein said diffuser comprises a directional diffuser.
Claim 6
Dependent Claim
22 words
The apparatus of claim 2 wherein said second optical means comprises a cylindrical mirror inclined at an angle to said predetermined path.
Claim 7
Dependent Claim
12 words
The apparatus of claim 2 wherein said diffuser comprises a directional diffuser.
Claim 8
Dependent Claim
12 words
The apparatus of claim 3 wherein said diffuser comprises a directional diffuser.
Claim 9
Dependent Claim
12 words
The apparatus of claim 5 wherein said diffuser comprises a directional diffuser.
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) | 1988-06-03 | 1988-12-03 | 1989-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-03 | 1992-12-03 | 1993-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-03 | 1996-12-03 | 1997-06-04 | $7700.00 | Window Closed / Lapsed |