Patent US4753514A successfully refreshed from Google Patents.
US4753514A
Expired / Lapsed
US
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Headwear-mounted periscopic display device
Assignee: IOTA TECHNOLOGIES Inc
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Filing: 1986-05-12
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Granted: 1988-06-28
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Expires: 2006-05-12
Abstract
Abstract A periscopic display device for close up viewing of a display. The device includes means for generating a display, such as an LED, LCD, or ELD display, and periscopic means consisting of a body of optically clear material having a reflecting prism portion and a collimating lens portion. The prism portion includes a first planar surface positioned parallel and adjacent to the display and a plurality of optically aligned reflecting surfaces for transmitting a reflected image of the display. The collimating lens portion consists of a convex lens having a focal point at the display and is positioned to receive the reflected image for focusing the image at optical infinity. Preferably the body includes a mounting portion in which the display generating means is embedded. The display device is lightweight, waterproof, dustproof, and is easily mounted on the eyeglass frames, visor, or headband of the wearer.
Inventors
- 👤 James C. Kubik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:47
CPC Classifications
G; G02; G02C; G02C7/00; G02C7/14; G02C9/00; G02C9/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
190 words
A periscopic display device for close-up viewing of a display, said device comprising: means for generating a display; unitary periscopic means for viewing a virtual image of the display, said periscopic means comprising a body of optically clear material having a reflecting prism portion and a collimating lens portion, said prism portion including a first planar surface positioned parallel and adjacent to said display and a pair of optically aligned reflecting surfaces for transmitting a reflected image of said display, said first reflecting surface being disposed at an angle of about 45° with respect to said first planar surface and said second reflecting surface being disposed at an angle of from about 103° to about 107° with respect to said first reflecting surface, said collimating lens portion comprising a convex lens having a focal point at said display and positioned to receive said reflected image for focusing said image at optical infinity; said display generating means being mounted on said first planar surface; and means for mounting said composite periscopic means and display generating means on headwear for positioning said collimating lens portion within the viewing field of the user.
Claim 2
Dependent Claim
190 words
A periscopic display device for close-up viewing of a display, said device comprising: means for generating a display; unitary periscopic means for viewing a virtual image of the display, said periscopic means comprising a body of optically clear material having a reflecting prism portion and a collimating lens portion, said prism portion including a first planar surface positioned parallel and adjacent to said display and a pair of optically aligned reflecting surfaces for transmitting a reflected image of said display, said first reflecting surface being disposed at an angle of about 45° with respect to said first planar surface and said second reflecting surface being disposed at an angle of from about 103° to about 107° with respect to said first reflecting surface, said collimating lens portion comprising a convex lens having a focal point at said display and positioned to receive said reflected image for focusing said image at optical infinity; said display generating means being mounted on said first planar surface; and means for mounting said composite periscopic means and display generating means on headwear for positioning said collimating lens portion within the viewing field of the user.
Claim 3
Dependent Claim
36 words
The periscopic display device of claim 1, wherein said body is made of a clear epoxy resin having a refractive index of about 1.5 and said focal length of said collimating lens is about one inch.
Claim 4
Dependent Claim
23 words
The periscopic display device of claim 1, wherein said body further includes a mounting portion in which said display generating means is embedded.
Claim 5
Dependent Claim
27 words
The periscopic display device of claim 3, wherein said display generating means is an electronic display selected from the group consisting of LED, LCD, and ELD displays.
Claim 6
Dependent Claim
27 words
The periscopic display device of claim 1, wherein said second reflecting surface is disposed at an angle of about 105° with respect to said first reflecting surface.
Claim 7
Dependent Claim
13 words
The periscopic display device of claim 1, wherein said reflecting surfaces are mirrored.
Claim 8
Dependent Claim
23 words
The periscopic display device of claim 1, wherein said collimating lens has a focal length of from about 0.9 to about 1.1 inches.
Claim 9
Dependent Claim
19 words
The periscopic display device of claim 7, wherein said collimating lens has a focal length of about one inch.
Claim 10
Dependent Claim
23 words
The periscopic display device of claim 8, wherein said body is made of clear epoxy resin having a refractive index of about 1.5.
References Cited (Backward Citations)
GB301672A
Cited
US3216308A
Cited
US3229580A
Cited
US3524710A
Cited
DE2205325A1
Cited
US4052073A
Cited
JPS58113913A
Cited
US4550984A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-28 | 1991-12-28 | 1992-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-28 | 1995-12-28 | 1996-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-28 | 1999-12-28 | 2000-06-28 | $7700.00 | Window Closed / Lapsed |