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US4218111A
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Holographic head-up displays
Assignee: Raytheon Co
•
Filing: 1978-07-10
•
Granted: 1980-08-19
•
Expires: 1998-07-10
Abstract
Abstract There is disclosed an integrated optical design of head-up displays suitable for use in aircraft cockpits and the like. The display system is comprised of a holographic optical element used as the combiner for presenting a direct view of the exterior on which are superimposed image signals generated by a source device such as a cathode ray tube and transmitted to the combiner through an optical system including a relay lens containing tilted and decentered optical elements to compensate for the aberration present in the holographic optical element. There are further disclosed four relay lens design forms particularly suited for use in the design of such holographic head-up displays. The disclosure includes integrated designs in which (a) the holographic element may or may not be constructed with aberrated wavefront and (b) a beam splitter is incorporated for insertion of a stand-by sight, possibly also being tilted for the correction of aberrations.
Inventors
- 👤 Roger J. Withrington
- 👤 Lacy G. Cook
- 👤 Helene H. Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:06
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/0025; G02B13/00; G02B27/01; G02B27/0101; G02B27/0103; G02B2027/0105; G02B2027/0107; G02B2027/011; G02B2027/0145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
290 words
In a head-up display system of the type including a source of optical image signal, relay lens means for relaying said optical image signal to a holographic element positioned and used as a combiner lens so that the user may see both said optical image signal projected to said holographic optical element and the external world through said holographic element, optical elements comprising said source of optical image signal (element I), said relay lens means (elements II-VIII), a notch bandpass filter (element IX) and a folding prism (element X), said elements having the following prescription characteristics: ______________________________________
ELE- SURF
MENT NO. RD TH* INDEX TILT** DEC**
______________________________________
I 51 ∞ .250 1.517 12.496 0
52 ∞ 3.503 AIR 12.496 .054
II 53 -34.998 1.410 1.785 -9.906 .731
54 -5.687 .084 AIR -9.906 .488
III 55 26.795 .725 1.785 1.943 .246
56 -19.482 .050 AIR -1.943 .222
IV 57 13.723 .656 1.785 -1.943 .220
58 289.330 .050 AIR -1.943 .198
V 59 6.940 .570 1.785 -1.943 .196
60 15.616 .050 AIR -1.943 .177
VI 61 3.355 1.834 1.607 -2.728 .175
62 -8.042 .170 1.728 -1.943 .113
63 1.926 2.625 AIR -1.943 .107
VII 64 5.727 1.056 1.620 -6.147 .478
65 -11.880 .179 AIR -6.147 .365
VIII 66 ∞ .250 1.517 0 0
67 ∞ 5.344 AIR 0 0
IX 68 ∞ .437 1.522 -22.316
0
69 ∞ / / -26.482
-.166
______________________________________
*Glass thicknesses are measured along the axis of the first surface of th
lens; air thicknesses are measured along an arbitrary reference line 20.
**Surface tilts and decenters are relative to line 20. Decentration
applies prior to tilt. Tilt is specified in angular deviation from the
normal to line 20. Decentration is specified along the normal to line 20.
Claim 2
Dependent Claim
290 words
In a head-up display system of the type including a source of optical image signal, relay lens means for relaying said optical image signal to a holographic element positioned and used as a combiner lens so that the user may see both said optical image signal projected to said holographic optical element and the external world through said holographic element, optical elements comprising said source of optical image signal (element I), said relay lens means (elements II-VIII), a notch bandpass filter (element IX) and a folding prism (element X), said elements having the following prescription characteristics: ______________________________________
ELE- SURF
MENT NO. RD TH* INDEX TILT** DEC**
______________________________________
I 51 ∞ .250 1.517 12.496 0
52 ∞ 3.503 AIR 12.496 .054
II 53 -34.998 1.410 1.785 -9.906 .731
54 -5.687 .084 AIR -9.906 .488
III 55 26.795 .725 1.785 1.943 .246
56 -19.482 .050 AIR -1.943 .222
IV 57 13.723 .656 1.785 -1.943 .220
58 289.330 .050 AIR -1.943 .198
V 59 6.940 .570 1.785 -1.943 .196
60 15.616 .050 AIR -1.943 .177
VI 61 3.355 1.834 1.607 -2.728 .175
62 -8.042 .170 1.728 -1.943 .113
63 1.926 2.625 AIR -1.943 .107
VII 64 5.727 1.056 1.620 -6.147 .478
65 -11.880 .179 AIR -6.147 .365
VIII 66 ∞ .250 1.517 0 0
67 ∞ 5.344 AIR 0 0
IX 68 ∞ .437 1.522 -22.316
0
69 ∞ / / -26.482
-.166
______________________________________
*Glass thicknesses are measured along the axis of the first surface of th
lens; air thicknesses are measured along an arbitrary reference line 20.
**Surface tilts and decenters are relative to line 20. Decentration
applies prior to tilt. Tilt is specified in angular deviation from the
normal to line 20. Decentration is specified along the normal to line 20.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-08-19 | 1984-02-18 | 1984-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-19 | 1988-02-18 | 1988-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-19 | 1992-02-18 | 1992-08-19 | $7700.00 | Window Closed / Lapsed |