US3762793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical compensation device
Assignee: Linde Sverige AB
•
Filing: 1972-05-24
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Granted: 1973-10-02
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Expires: 1992-05-24
Abstract
Abstract An optical compensation device precompensates optical aberrations which are not rotational-symmetrical but symmetrical in relation to two or more perpendicular, possibly equiangularly turned planes through the optical axis. Such aberrations develop in optical systems in which an optical image is being scanned in two dimensions by means of two or more prisms which during the scanning operation rotate around axes perpendicular to each other and to the optical axis. At least two cylinder lenses the axes of which coincide with the optical axis, which lenses are spaced a short distance relative to the focal length of the lenses and which are positioned symmetrically relative to the plane of symmetry of the aberrative images or one or more pairs of perpendicularly crossed lenses, both lenses in one pair having the same refractive power, the axes of which lenses coincide with the optical axis and are mutually spaced a short distance relative to the focal length of the lenses, effect the precompensation operation. One or more rotational-symmetrical lenses generate arbitrary refractive power and corrects rotational-symmetrical aberrations of the image.
Inventors
- 👤 S Ullstig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:57
CPC Classifications
G; G02; G02B; G02B26/00; G02B26/08; G02B26/10; G02B26/108; G02B27/00; G02B27/0025
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
168 words
An optical compensation device for the compensation of such optical aberrations which are other than rotational-symmetrical but symmetrical in relation to at least two orthogonal planes through the optical axis, especially for the precompensation of such optical aberrations which develop in optical systems in which an optical image is being scanned in two dimensions by means of two prisms which during the scanning operation rotate around axes which are perpendicular to each other and to the optical axis, comprising, an optical system having an optical axis, said optical system including at least two prisms which during a scanning operation rotate around axes which are perpendicular to each other and to the optical axis of the system, at least two cylindrical lenses, the axes of which coincide with the optical axis of the system and which cylindrical lenses are mutually spaced a short distance relative to the focal length of the cylindrical lenses, said cylindrical lenses being positioned symmetrically relative to the planes of symmetry of the aberrative image.
Claim 2
Dependent Claim
168 words
An optical compensation device for the compensation of such optical aberrations which are other than rotational-symmetrical but symmetrical in relation to at least two orthogonal planes through the optical axis, especially for the precompensation of such optical aberrations which develop in optical systems in which an optical image is being scanned in two dimensions by means of two prisms which during the scanning operation rotate around axes which are perpendicular to each other and to the optical axis, comprising, an optical system having an optical axis, said optical system including at least two prisms which during a scanning operation rotate around axes which are perpendicular to each other and to the optical axis of the system, at least two cylindrical lenses, the axes of which coincide with the optical axis of the system and which cylindrical lenses are mutually spaced a short distance relative to the focal length of the cylindrical lenses, said cylindrical lenses being positioned symmetrically relative to the planes of symmetry of the aberrative image.
Claim 3
Dependent Claim
23 words
The optical compensation device of claim 1 including additional rotational-symmetrical lenses positioned along the optical axis to correct rotational-symmetrical aberrations of the image.
Claim 4
Dependent Claim
147 words
An optical precompensation system for optical aberrations which are other than rotational-symmetrical but symmetrical relative to for equiangular turned planes through the optical axis and which develop in optical systems in which an optical image is being scanned in two dimensions by means of at least two prisms, comprising an optical system have an optical axis, said optical system including at least two prisms which during the scanning operation, rotate around axes which are mutually perpendicular and perpendicular to the optical axis during a scanning operation, at least one pair of lenses having their optical axes perpendicularly crossed, both crossed lenses in one pair having the same refractive power, the axes of said Perpendicularly crossed references coinciding with the optical axis of said optical system, said pair of perpendicularly crossed lenses being spaced from one another a short distance relative to the focal length of the lenses.
Claim 5
Dependent Claim
147 words
An optical precompensation system for optical aberrations which are other than rotational-symmetrical but symmetrical relative to for equiangular turned planes through the optical axis and which develop in optical systems in which an optical image is being scanned in two dimensions by means of at least two prisms, comprising an optical system have an optical axis, said optical system including at least two prisms which during the scanning operation, rotate around axes which are mutually perpendicular and perpendicular to the optical axis during a scanning operation, at least one pair of lenses having their optical axes perpendicularly crossed, both crossed lenses in one pair having the same refractive power, the axes of said Perpendicularly crossed references coinciding with the optical axis of said optical system, said pair of perpendicularly crossed lenses being spaced from one another a short distance relative to the focal length of the lenses.
Claim 6
Dependent Claim
43 words
The precompensation device of claim 3 wherein said prisms are of equal thickness, said crossed lenses comprising cylindrical lenses, the planes of symmetry of the cylindrical lenses of the different pairs of lenses coinciding with the planes of symmetry of the aberrative image.
Claim 7
Dependent Claim
21 words
The precompensation device in accordance with claim 3 including at least one additional rotational-symmetrical lens correcting rotational-symmetrical aberrations of the image.
Claim 8
Dependent Claim
156 words
An optical precompensation device of optical aberrations which are other than rotational-symmetrical but symmetrical in relation to two planes which are perpendicular to each other through an optical axis and which develop in optical systems in which an optical image is being scanned in two dimensions by means of at least two prisms which during the scanning operation rotate around axes which are perpendicular to each other and to the optical axis, comprising an optical system including at least two prisms, said prisms being operative during the scanning operation to rotate around axes which are perpendicular to each other and to the optical axis of the system, said set of cylindrical lenses comprising at least two afocal cylindrical lens systems, at least one set of cylindrical lenses being arranged symmetrically relative to the plane of symmetry of the aberrative image so that the planes of symmetry of the cylinder lens system lie in the optical axis.
Claim 9
Dependent Claim
156 words
An optical precompensation device of optical aberrations which are other than rotational-symmetrical but symmetrical in relation to two planes which are perpendicular to each other through an optical axis and which develop in optical systems in which an optical image is being scanned in two dimensions by means of at least two prisms which during the scanning operation rotate around axes which are perpendicular to each other and to the optical axis, comprising an optical system including at least two prisms, said prisms being operative during the scanning operation to rotate around axes which are perpendicular to each other and to the optical axis of the system, said set of cylindrical lenses comprising at least two afocal cylindrical lens systems, at least one set of cylindrical lenses being arranged symmetrically relative to the plane of symmetry of the aberrative image so that the planes of symmetry of the cylinder lens system lie in the optical axis.
Claim 10
Dependent Claim
31 words
A precompensation device in accordance with claim 6 including additional sets of cylinder lenses similar to said first mentioned set to achieve correction of the asymmetry of the aberrative optical image.
Claim 11
Dependent Claim
17 words
The precompensation device of claim 6 wherein each of the cylinder lens systems cylinder-generatrices are in parallel.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |