US4567585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical tape recorder using linear scanning
Assignee: Creo Inc
•
Filing: 1983-10-31
•
Granted: 1986-01-28
•
Expires: 2003-10-31
Abstract
Abstract An optical tape recorder is disclosed using the linear motion of a slide to record data across a slowly moving tape made of light sensitive material. Data is recorded on the tape by modulating the output of a laser in accordance with the data and focussing the modulated light onto the tape using a lens mounted on a slide. The position of the slide is measured using a linear optical encoder and this information is used to place the data accurately on the tape. The slide is connected to a spring and driven electromagnetically at its resonant frequency.
Inventors
- 👤 Daniel Gelbart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:44
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/002; G11B7/003; G02; G02B; G02B26/00; G02B26/08; G02B26/10; G11B7/08; G11B7/09; G11B7/0925
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
120 words
An optical data recorder comprising: a laser modulated according to incoming data; a tape made of light sensitive material; a slide constrained to move in a straight line reciprocally and transversly to said tape; a mirror mounted on said slide onto which said modulated laser beam impinges; a lens mounted on said slide to focus laser light reflected from said mirror into a small spot on said tape causing a permanent mark when said laser is turned on; means for accurately measuring the position of said slide; means for placing said marks on said tape in accordance with the measured position of said slide; and means for moving said tape slowly in a direction transverse to motion of said slide.
Claim 2
Dependent Claim
120 words
An optical data recorder comprising: a laser modulated according to incoming data; a tape made of light sensitive material; a slide constrained to move in a straight line reciprocally and transversly to said tape; a mirror mounted on said slide onto which said modulated laser beam impinges; a lens mounted on said slide to focus laser light reflected from said mirror into a small spot on said tape causing a permanent mark when said laser is turned on; means for accurately measuring the position of said slide; means for placing said marks on said tape in accordance with the measured position of said slide; and means for moving said tape slowly in a direction transverse to motion of said slide.
Claim 3
Dependent Claim
54 words
An optical data recorder as set forth in claim 1, further including a spring coupling said slide to a stationary part of said recorder and means for driving said slide at its resonant frequency of ##EQU2## where k is the spring constant of said spring and m is the total mass of the slide.
Claim 4
Dependent Claim
39 words
An optical data recorder as set forth in claim 2, wherein said slide is made of a ferromagnetic material and it oscillates in response to a periodic magnetic field generated by an electric current flowing through a stationary coil.
Claim 5
Dependent Claim
26 words
An optical data recorder as set forth in claim 1, wherein the said slide is constrained to move in a straight line by linear gas bearings.
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) | 1989-01-27 | 1989-07-29 | 1990-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-27 | 1993-07-29 | 1994-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-27 | 1997-07-29 | 1998-01-28 | $7700.00 | Window Closed / Lapsed |