Patent US3912927A successfully refreshed from Google Patents.
US3912927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Opto-mechanical device for phase shift compensation of oscillating mirror scanners
Assignee: Texas Instruments Inc
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Filing: 1972-11-13
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Granted: 1975-10-14
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Expires: 1992-11-13
Abstract
Abstract A radiant energy display system incorporating a reflecting surface gimbal mounted for rotation about scan and interlace axis, said scan and interlace axis positioned less than 90* from one another. Incoming radiant energy is scanned by the reflecting surface and reflected to a detector array which is responsive to that energy. Video processing circuitry interconnecting the detector array with a light source array modulates the light source array which thereby emits a modulated visible beam. This beam of visible light in turn impinges upon the back portion of the reflecting surface. A lens is attached to the gimbal in a line of sight path to the back portion of the reflecting surface for movement in accordance with the interlace movement of the gimbal. Light reflected from the back portion of the reflecting surface passes through the lens, whose movement with the interlace gimbal compensates the image for electronic phase shift. The electronic phase shift is defined as the amount of offset caused by the finite time required to propagate a signal from the input of the video processing circuitry to its output. The image formed by the lens provides a scan representative of the field of view for an erect image telescope or other type display.
Inventors
- 👤 Ii Richard G Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:35
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/02; H04N3/08; H04N3/09
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
168 words
An apparatus for scanning radiant energy comprising: a. a radiant energy reflecting surface mounted for movement about a first and second axes, said first axis located less than 90* from said second axis; b. means for rotating said radiant energy reflecting surface about said first axis, and for rotating about said second axis and for counter rotating said reflecting surface about said first axis; c. detector means for receiving the radiant energy from said reflecting surface and producing an output signal that varies with the radiant energy incident thereon; d. light source means responsive to said output signal for producing a visible light beam representative of said radiant energy, said visible light beam being scanned on the back surface of the radiant energy reflecting surface; and e. means in the line of sight path to the back surface of the radiant energy reflecting surface operatively responsive to movement of the second axis for correcting lateral displacements appearing in the visible image produced by the radiant energy display system.
Claim 2
Independent Claim
168 words
An apparatus for scanning radiant energy comprising: a. a radiant energy reflecting surface mounted for movement about a first and second axes, said first axis located less than 90* from said second axis; b. means for rotating said radiant energy reflecting surface about said first axis, and for rotating about said second axis and for counter rotating said reflecting surface about said first axis; c. detector means for receiving the radiant energy from said reflecting surface and producing an output signal that varies with the radiant energy incident thereon; d. light source means responsive to said output signal for producing a visible light beam representative of said radiant energy, said visible light beam being scanned on the back surface of the radiant energy reflecting surface; and e. means in the line of sight path to the back surface of the radiant energy reflecting surface operatively responsive to movement of the second axis for correcting lateral displacements appearing in the visible image produced by the radiant energy display system.
Claim 3
Dependent Claim
32 words
A radiant energy display system according to claim 1, wherein said means responsive to the movement of the second axis for correcting lateral displacements appearing in the visible image comprises a lens.
Claim 4
Dependent Claim
89 words
A radiant energy display system according to claim 1, wherein said radiant energy reflecting surface is gimbal mounted to provide a scanning movement about the first axis and an interlacing movement about the second axis in a direction less than 90* to the scanning movement, and wherein said means for correcting the lateral displacements of the visual image is a lens mounted in the line of sight path to the back surface of the radiant energy reflecting surface operatively responsive to movement of the gimbal providing the interlacing movement.
Claim 5
Dependent Claim
23 words
An apparatus for scanning radiant energy according to claim 3, wherein said lens is supported by the gimbal means producing the interlacing movement.
Claim 6
Dependent Claim
41 words
An apparatus for scanning radiant energy according to claim 4, wherein said lens mounted in the line of sight path to the back surface of the radiant energy reflecting surface is adjustably mounted in the gimbal means producing the interlacing movement.
Claim 7
Independent Claim
159 words
An apparatus for scanning radiant energy comprising: a. a mirror having a radiant energy reflecting surface positioned to receive radiant energy, and a light reflecting surface positioned to receive visible light energy; b. electronic means operatively responsive to radiant energy reflected from the radiant energy reflecting surface of the mirror for producing on the rear side of the mirror a visible light image indicative of the reflected radiant energy; c. a gimbal means pivotally supporting the mirror for movement in a scanning direction; d. a gimbal support means including a pivotal support for said gimbal means, said pivotal support forming an interlace axis disposed less than 90* to the scanning axis; and e. a lens member supported by the gimbal support means in the line of sight path to the rear side of the mirror for movement corresponding to the gimbal interlace movement for correcting lateral displacements appearing in the visual image as a result of electronic phase shift.
Claim 8
Independent Claim
159 words
An apparatus for scanning radiant energy comprising: a. a mirror having a radiant energy reflecting surface positioned to receive radiant energy, and a light reflecting surface positioned to receive visible light energy; b. electronic means operatively responsive to radiant energy reflected from the radiant energy reflecting surface of the mirror for producing on the rear side of the mirror a visible light image indicative of the reflected radiant energy; c. a gimbal means pivotally supporting the mirror for movement in a scanning direction; d. a gimbal support means including a pivotal support for said gimbal means, said pivotal support forming an interlace axis disposed less than 90* to the scanning axis; and e. a lens member supported by the gimbal support means in the line of sight path to the rear side of the mirror for movement corresponding to the gimbal interlace movement for correcting lateral displacements appearing in the visual image as a result of electronic phase shift.
Claim 9
Dependent Claim
48 words
An apparatus for scanning radiant energy according to claim 6, wherein said lens is threadedly mounted in the gimbal support means for adjusting the distance between the lens and the interlace axis for correcting lateral displacements appearing in the visual image as a result of electronic phase shift.
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) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |