US3753151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mode selector for scan laser
Assignee: US Philips Corp
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Filing: 1972-06-02
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Granted: 1973-08-14
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Expires: 1992-06-02
Abstract
Abstract The invention relates to a mode selector having a plate showing an electro-optical effect in an electric field to control the modes of oscillation in a scan laser. The new mode selector consists of two identical selectors which are rotated relative to each other through 90* and which are each arranged in a focal plane of the laser-resonator and of which one controls the x coordinate and the other controls the y coordinate of the focus, in which a plate-shaped electro-optical KDP material is surrounded by grid-shaped electrodes between which electric fields are produced which, with the exception of a strip-shaped region, everywhere exceed a certain minimum intensity but disappear or are very small in the strip-shaped region. The electrodes are two grids of parallel wires and the individual wires have such a potential that either a transverse or a longitudinal electro-optical effect occurs in the electro-optical material.
Inventors
- 👤 G Schulten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:24
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/10; H01S3/101; G; G02; G02F; G02F1/00; G02F1/01; G02F1/03; G02F1/0305; G02F1/0322
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
92 words
In a mode selector device, for use in a scan laser for controlling modes of oscillation in said laser, the subcombination comprising a plate-like material having an electro-optical effect under the influence of an electric field, grid-shaped electrodes substantially surrounding said plate-like material for providing electric fields for said material, and means for supplying a potential to said grids to form a field exceeding a certain minimum intensity with exception of a stripshaped region of said material wherein said electric fields are diminished and are capable of being non-existent in said region.
Claim 2
Dependent Claim
92 words
In a mode selector device, for use in a scan laser for controlling modes of oscillation in said laser, the subcombination comprising a plate-like material having an electro-optical effect under the influence of an electric field, grid-shaped electrodes substantially surrounding said plate-like material for providing electric fields for said material, and means for supplying a potential to said grids to form a field exceeding a certain minimum intensity with exception of a stripshaped region of said material wherein said electric fields are diminished and are capable of being non-existent in said region.
Claim 3
Dependent Claim
47 words
The mode selector device of claim 1, wherein said electrodes comprise two grids of substantially parallel wires, and further comprising means for impressing each of said wires with an individual potential wherein the two grids can be provided with a similar field with respect to each other.
Claim 4
Dependent Claim
47 words
The mode selector device of claim 1, wherein said electrodes comprise two grids of substantially parallel wires, and further comprising means for impressing each of said wires with an individual potential wherein the two grids can be provided with an opposite field with respect to each other.
Claim 5
Dependent Claim
78 words
In a mode selector device for use in a scan laser for controlling modes of oscillation in said laser, the subcombination comprising a plate-like material having an electro-optical effect under the influence of an electric field, four cylindrical electrodes arranged about said material so as to form an electric quadrupole field for said plate-like material, and means for impressing said electrodes with a varying potential, so as to create a movable, centrally located, field-free region in said material.
Claim 6
Dependent Claim
78 words
In a mode selector device for use in a scan laser for controlling modes of oscillation in said laser, the subcombination comprising a plate-like material having an electro-optical effect under the influence of an electric field, four cylindrical electrodes arranged about said material so as to form an electric quadrupole field for said plate-like material, and means for impressing said electrodes with a varying potential, so as to create a movable, centrally located, field-free region in said material.
References Cited (Backward Citations)
US3519953A
Cited
US3644017A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |