Patent US5237451A successfully refreshed from Google Patents.
US5237451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beam shaping system using diffraction
Assignee: 3M Co
•
Filing: 1992-11-04
•
Granted: 1993-08-17
•
Expires: 2012-11-04
Abstract
Abstract A beam shaping system for an astigmatic light source utilizes two lenses, both having diffractive power. A first lens shapes the beam in a first dimension and a second lens shapes the beam in a second dimension perpendicular to the first.
Inventors
- 👤 Steven G. Saxe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:23
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/42; G02B6/4201; G02B6/4204; G02B6/4206; G02B13/00; G02B13/08; G02B19/00; G02B19/0004; G02B19/0009; G02B19/0014; G02B19/0033; G02B19/0047; G02B19/0052; G02B27/00; G02B27/0025; G02B27/0037; G02B27/09; G02B27/0911; G02B27/0938; G02B27/095; G02B27/0955; G02B27/0966; G02B27/42; G02B27/4233; G02B27/4244; G02B5/00; G02B5/18; G02B5/1876; G02B27/425
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
152 words
A beam shaping system for a diode laser said system having an optic axis along which a light beam emitted by a diode laser travels, said system comprising: a first lens means having diffractive power said first lens means intersecting said optic axis and being perpendicular thereto, said first lens means being for shaping said beam in a first dimension, said diffractive power of said first lens means being provided by a plurality of linear diffractive zones, said diffractive zones being separated by optical steps; and a second lens means having diffractive power said second lens means intersecting said optic axis and being perpendicular thereto, said second lens means being for shaping said beam in a second dimension, said second dimension being perpendicular to said first dimension, said diffractive power of said second lens means being provided by a plurality of linear diffractive zones said diffractive zones being separated by optical steps.
Claim 2
Dependent Claim
152 words
A beam shaping system for a diode laser said system having an optic axis along which a light beam emitted by a diode laser travels, said system comprising: a first lens means having diffractive power said first lens means intersecting said optic axis and being perpendicular thereto, said first lens means being for shaping said beam in a first dimension, said diffractive power of said first lens means being provided by a plurality of linear diffractive zones, said diffractive zones being separated by optical steps; and a second lens means having diffractive power said second lens means intersecting said optic axis and being perpendicular thereto, said second lens means being for shaping said beam in a second dimension, said second dimension being perpendicular to said first dimension, said diffractive power of said second lens means being provided by a plurality of linear diffractive zones said diffractive zones being separated by optical steps.
Claim 3
Dependent Claim
27 words
The beam shaping system of claim 1 wherein said diffractive zones of said first lens means being perpendicular to said diffractive zones of said second lens means.
Claim 4
Dependent Claim
33 words
The beam shaping system of claim 2 wherein each optical step provides a change in optical path length for said beam equal to λ, where λ is a design wavelength for said system.
Claim 5
Dependent Claim
64 words
The beam shaping system of claim 2 wherein some of said optical steps of each lens provide a change in optical path length for said beam equal to Jλ and some of said optical steps of each lens provide a change in optical path length equal to Kλ, where λ is a design wavelength for said system and J and K are unequal integers.
Claim 6
Dependent Claim
13 words
The beam shaping system of claim 2 wherein said zones have linear contours.
Claim 7
Dependent Claim
33 words
The beam shaping system of claim 5 wherein each optical step provides a change in optical path length of said beam equal to λ, where λ is a design wavelength for said system.
Claim 8
Dependent Claim
64 words
The beam shaping system of claim 5 wherein some of said optical steps of each lens provide a change in optical path length for said beam equal to Jλ and some of said optical steps of each lens provide a change in optical path length equal to Kλ, where λ is a design wavelength for said system and J and K are unequal integers.
Claim 9
Dependent Claim
13 words
The beam shaping system of claim 2 wherein said zones have hyperbolic contours.
Claim 10
Dependent Claim
33 words
The beam shaping system of claim 8 wherein each optical step provides a change in optical path length for said beam equal to λ, where λ is a design wavelength for said system.
Claim 11
Dependent Claim
64 words
The beam shaping system of claim 8 wherein some of said optical steps of each lens provide a change in optical path length for said beam equal to Jλ and some of said optical steps of each lens provide a change in optical path length equal to Kλ, where λ is a design wavelength for said system and J and K are unequal integers.
Claim 12
Dependent Claim
13 words
The beam shaping system of claim 2 wherein said zones have stepwise contours.
References Cited (Backward Citations)
US3658402A
Cited
US4355858A
Cited
US4733943A
Cited
US4779943A
Cited
US4824191A
Cited
US4779259A
Cited
US4904034A
Cited
US4876680A
Cited
US4832464A
Cited
US4937808A
Cited
US4815084A
Cited
US4881805A
Cited
JPH01142604A
Cited
US4936666A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-08-16 | 1997-02-15 | 1997-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-16 | 2001-02-15 | 2001-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-16 | 2005-02-15 | 2005-08-17 | $7700.00 | Window Closed / Lapsed |