US3668984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical character spacing system for phototypesetting
Assignee: Harris Corp
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Filing: 1970-05-04
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Granted: 1972-06-13
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Expires: 1990-05-04
Abstract
Abstract A character image projection system successively projects image bearing light beams along a common optical axis toward a photosensitive surface. The images of the individual characters are spaced on the photosensitive surface to form lines of composition. The spacing is accomplished by collimating the image bearing light beams, then diverting the collimated beam by means of a movable reflecting surface into a refocusing and scan lens assembly from which the light beams emit onto the photosensitive surface. The position of the reflector may be controlled by a servo mechanism which responds to character image space information from a computer. The refocusing and scan lens assembly incorporates compensation for the angular position of the reflecting member whereby the character images remain in focus and are properly spaced even though the photosensitive surface is maintained flat at the image plane of the system.
Inventors
- 👤 Seymour Rosin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:37
CPC Classifications
G; G02; G02B; G02B13/00; G02B13/0005; B; B41; B41B; B41B17/00; B41B17/04; B41B17/10; B41B21/00; B41B21/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
167 words
In a phototypesetting machine having a character projection system adapted to create selectively different characters along a common optical axis, means for supporting a photosensitive surface in an image plane spaced from said projection system, an improved optical spacing system comprising a series of optical elements including a collimating lens receiving light beams from said projection system, selectively movable means for changing angularly the direction of the collimated beams according to desired character image spacing, a scan lens receiving the collimated beams from said movable means and refocusing the beams to produce images on the photosensitive surface, said scan lens including means constructed and arranged to adjust the beams according to the relationship y'' f . theta , where y'' is the distance of the image from the intersection of the axis of the scan lens and the image plane, f is the effective focal length of the scan lens, and theta is the angle between the collimated beams and the optical axis of the scan lens.
Claim 2
Dependent Claim
167 words
In a phototypesetting machine having a character projection system adapted to create selectively different characters along a common optical axis, means for supporting a photosensitive surface in an image plane spaced from said projection system, an improved optical spacing system comprising a series of optical elements including a collimating lens receiving light beams from said projection system, selectively movable means for changing angularly the direction of the collimated beams according to desired character image spacing, a scan lens receiving the collimated beams from said movable means and refocusing the beams to produce images on the photosensitive surface, said scan lens including means constructed and arranged to adjust the beams according to the relationship y'' f . theta , where y'' is the distance of the image from the intersection of the axis of the scan lens and the image plane, f is the effective focal length of the scan lens, and theta is the angle between the collimated beams and the optical axis of the scan lens.
Claim 3
Dependent Claim
38 words
A phototypesetting machine as defined in claim 1, including a magnification lens between said projection system and said collimating lens, and a field lens receiving light from said magnification lens and gathering the light into said collimating lens.
Claim 4
Dependent Claim
35 words
A phototypesetting machine as defined in claim 2, including a plurality of magnification lenses and mechanism for selectively moving one of said magnification lenses into operating position between said projection system and said field lens.
Claim 5
Dependent Claim
45 words
A phototypesetting machine as defined in claim 1, wherein said movable means for changing the angular direction of the collimated beams is a reflecting member intersecting the beams emitting from said collimating lens and rotatable about an axis at right angles to such collimated beams.
Claim 6
Dependent Claim
44 words
A phototypesetting machine as defined in claim 4, wherein said reflecting member is rotatable about an axis parallel to the vertical dimension of the character field of the character images to cause side by side spacing of the character images on the photosensitive surface.
Claim 7
Dependent Claim
22 words
A phototypesetting machine as defined in claim 5, including a servo motor connected to control the angular position of said reflecting member.
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |