US4830442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Off-axis holographic instrument illuminator
Assignee: Delphi Technologies Inc
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Filing: 1987-01-06
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Granted: 1989-05-16
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Expires: 2007-01-06
Abstract
Abstract A converter hologram providing radially symmetric exposure of coaxially located holograms from an off-axis source and displays utilizing the same.
Inventors
- 👤 Gaylord E. Moss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:54
CPC Classifications
G; G03; G03H; G03H1/00; G02; G02B; G02B5/00; G02B5/32; G03H1/22
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
77 words
An optical system comprising: a hologram disposed on an optical axis; an off-axis illumination source disposed at an angle to said axis; and hologram means illuminated by said off-axis source for projecting a radially symmetric illumination wavefront onto said hologram, said hologram means comprising a hologram recording plate having an axis, and a hologram interference pattern means recorded on said plate for projecting a radially symmetric illumination wavefront in response to illumination from a selected off-axis angle.
Claim 2
Dependent Claim
77 words
An optical system comprising: a hologram disposed on an optical axis; an off-axis illumination source disposed at an angle to said axis; and hologram means illuminated by said off-axis source for projecting a radially symmetric illumination wavefront onto said hologram, said hologram means comprising a hologram recording plate having an axis, and a hologram interference pattern means recorded on said plate for projecting a radially symmetric illumination wavefront in response to illumination from a selected off-axis angle.
Claim 3
Dependent Claim
19 words
The optical system of claim 1 wherein said recorded interference pattern means includes a plurality of pie-shaped recorded segments.
Claim 4
Dependent Claim
66 words
An optical system comprising a transmission instrument hologram disposed on an optical axis; an off-axis illumination source disposed at an angle to said axis; and hologram means illuminated by said off-axis source for projecting a radially symmetric illumination wavefront onto said hologram, said hologram means comprising a reflection converter hologram means for reflecting a radially symmetric illumination wavefront from said source through said transmission instrument hologram.
Claim 5
Dependent Claim
66 words
An optical system comprising a transmission instrument hologram disposed on an optical axis; an off-axis illumination source disposed at an angle to said axis; and hologram means illuminated by said off-axis source for projecting a radially symmetric illumination wavefront onto said hologram, said hologram means comprising a reflection converter hologram means for reflecting a radially symmetric illumination wavefront from said source through said transmission instrument hologram.
Claim 6
Dependent Claim
69 words
An optical system comprising a reflection instrument hologram disposed on an optical axis; an off-axis illumination source disposed at an angle to said axis; and hologram means illuminated by said off-axis source for projecting a radially symmetric illumination wavefront onto said hologram, said hologram means comprising a transmission converter for transmitting a radially symmetric illumination wavefront to said reflection instrument hologram in response to illumination received from said source.
Claim 7
Dependent Claim
69 words
An optical system comprising a reflection instrument hologram disposed on an optical axis; an off-axis illumination source disposed at an angle to said axis; and hologram means illuminated by said off-axis source for projecting a radially symmetric illumination wavefront onto said hologram, said hologram means comprising a transmission converter for transmitting a radially symmetric illumination wavefront to said reflection instrument hologram in response to illumination received from said source.
Claim 8
Dependent Claim
79 words
A display comprising: a first hologram means disposed on an optical axis for creating a fixed display; a second hologram means disposed on said optical axis for creating a display which rotates with respect to said fixed display; an illumination source means disposed off said optical axis for illuminating said second hologram means; and a third hologram means for receiving the illumination of said illumination source means and providing a radially symmetric illumination wavefront to said second hologram means.
Claim 9
Dependent Claim
79 words
A display comprising: a first hologram means disposed on an optical axis for creating a fixed display; a second hologram means disposed on said optical axis for creating a display which rotates with respect to said fixed display; an illumination source means disposed off said optical axis for illuminating said second hologram means; and a third hologram means for receiving the illumination of said illumination source means and providing a radially symmetric illumination wavefront to said second hologram means.
Claim 10
Dependent Claim
43 words
The display of claim 5 wherein said hologram means comprises: a hologram recording plate having an axis; and a hologram interference pattern means recorded on said plate for projecting a radially symmetric illumination wavefront in response to illumination from a selected off-axis angle.
Claim 11
Dependent Claim
18 words
The display of claim 6 wherein said recorded interference pattern means comprises a plurality of pie-shaped recorded segments.
Claim 12
Dependent Claim
51 words
The display of claim 5 wherein at least one of said first and second hologram means comprises a transmission hologram and wherein said third hologram means comprises a reflection converter hologram means for reflecting a radially symmetric illumination wavefront onto said transmission hologram in response to illumination by said illumination source.
Claim 13
Dependent Claim
50 words
The display of claim 5 wherein at least one of said first and second hologram means comprises a reflection hologram and said third hologram means comprises a transmission converter hologram for transmitting a radially symmetric illumination wavefront to said reflection hologram in response to illumination received from said illumination source.
Claim 14
Dependent Claim
85 words
An optical system having a hologram display disposed on an optical axis, an off-axis illumination source disposed at an angle to said axis, and a hologram means illuminated by said off-axis source for projecting a radially symmetric waveform across substantially the entire face of said hologram display wherein said hologram means comprises: a hologram recording plate having an axis, and a hologram interference pattern means recorded on said plate for projecting a radially symmetric illumination wavefront in response to illumination from a selected off-axis angle.
Claim 15
Dependent Claim
85 words
An optical system having a hologram display disposed on an optical axis, an off-axis illumination source disposed at an angle to said axis, and a hologram means illuminated by said off-axis source for projecting a radially symmetric waveform across substantially the entire face of said hologram display wherein said hologram means comprises: a hologram recording plate having an axis, and a hologram interference pattern means recorded on said plate for projecting a radially symmetric illumination wavefront in response to illumination from a selected off-axis angle.
Claim 16
Dependent Claim
19 words
The optical system of claim 10 wherein said recorded interference pattern means includes a plurality of pie-shaped recorded segments.
Claim 17
Dependent Claim
40 words
The optical system of claim 10 wherein said hologram display comprises a transmission instrument hologram and said hologram means comprises a reflection converter hologram means for reflecting a radially symmetric illumination wavefront from said source through said transmission instrument hologram.
Claim 18
Dependent Claim
43 words
The optical system of claim 10 wherein said hologram display comprises a reflection instrument hologram and said hologram means comprises a transmission converter for transmitting a radially symmetric illumination wavefront to said reflection instrument hologram in response to illumination received from said source.
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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) | 1992-05-15 | 1992-11-14 | 1993-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-15 | 1996-11-14 | 1997-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-15 | 2000-11-14 | 2001-05-16 | $7700.00 | Window Closed / Lapsed |