US4398799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Head-up displays
Assignee: Qioptiq Ltd
•
Filing: 1981-02-24
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Granted: 1983-08-16
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Expires: 2001-02-24
Abstract
Abstract In a head-up display system by which visual information from a display is superimposed by means of a combiner on a pilot's view of the outside scene, the pilot's view is recorded by a head mounted camera to which light from the outside scene and superimposed display is reflected by a head-mounted mirror. The arrangement is particularly useful for pilot training purposes.
Inventors
- 👤 David W. Swift
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:01
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/01; G02B27/0101; G02B27/0103; G02B2027/0105; G02B2027/0107; G02B2027/0138; G02B27/0179; G02B2027/0187
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
99 words
Apparatus for use with a head-up display system by which displayed visual information is superimposed on an observer's view of an outside scene, the apparatus comprising a camera, means for mounting the camera on the head of the observer, light directing means having a reflective area, and means for mounting the light directing means on the head of the observer with said reflective area between the eyes of the observer so as to reflect light to the camera which thereby views both the outside scene and the superimposed displayed information from substantially the same viewing position as the observer.
Claim 2
Dependent Claim
99 words
Apparatus for use with a head-up display system by which displayed visual information is superimposed on an observer's view of an outside scene, the apparatus comprising a camera, means for mounting the camera on the head of the observer, light directing means having a reflective area, and means for mounting the light directing means on the head of the observer with said reflective area between the eyes of the observer so as to reflect light to the camera which thereby views both the outside scene and the superimposed displayed information from substantially the same viewing position as the observer.
Claim 3
Dependent Claim
107 words
Head-up display apparatus comprising a display source, superimposing means for superimposing an image of visual information displayed by the display source on an observer's view of an outside scene, a camera, means for mounting the camera on the head of the observer, light directing means, and means for mounting the light directing means on the head of the observer at a position between the observer's two eyes to receive light from the superimposing means and direct it to the camera so that the camera views both the outside scene and the superimposed image of the displayed visual information from substantially the same viewing position as the observer.
Claim 4
Dependent Claim
107 words
Head-up display apparatus comprising a display source, superimposing means for superimposing an image of visual information displayed by the display source on an observer's view of an outside scene, a camera, means for mounting the camera on the head of the observer, light directing means, and means for mounting the light directing means on the head of the observer at a position between the observer's two eyes to receive light from the superimposing means and direct it to the camera so that the camera views both the outside scene and the superimposed image of the displayed visual information from substantially the same viewing position as the observer.
Claim 5
Dependent Claim
20 words
Apparatus according to claim 2 in which the light directing means comprises a mirror which reflects light to the camera.
Claim 6
Dependent Claim
41 words
Apparatus according to claim 3 in which the mirror is highly reflecting and small and mounted such that it is close to the bridge of the observer's nose so that the observer's eyes can look past the mirror on each side.
Claim 7
Dependent Claim
29 words
Apparatus according to claim 3 in which the mirror is partially reflecting so that the observer's eyes can view through the mirror by receiving light transmitted through the mirror.
Claim 8
Dependent Claim
14 words
Apparatus according to claim 2 in which the light directing means comprises a hologram.
Claim 9
Dependent Claim
17 words
Apparatus according to claim 1 or claim 2 in which the camera is carried on a helmet.
Claim 10
Dependent Claim
19 words
Apparatus according to claim 1 or claim 2 in which the light directing means is carried on a helmet.
Claim 11
Dependent Claim
18 words
Apparatus according to claim 1 or claim 2 in which the camera is focussed at or near infinity.
Claim 12
Dependent Claim
44 words
Apparatus according to claim 2, in which the superimposing means comprises diffractive optics which provide a real or effective exit pupil within whose limits the observer's eyes view, the apparatus being such that the camera also views within the limits of the exit pupil.
References Cited (Backward Citations)
US2950340A
Cited
US3614314A
Cited
US3737212A
Cited
US3885095A
Cited
US4040744A
Cited
US4051534A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-15 | 1987-02-14 | 1987-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-15 | 1991-02-14 | 1991-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-15 | 1995-02-14 | 1995-08-16 | $7700.00 | Window Closed / Lapsed |