US4754381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ellipsoidal reflector concentration of energy system
Assignee: Individual
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Filing: 1987-06-26
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Granted: 1988-06-28
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Expires: 2007-06-26
Abstract
Abstract An ellipsoidal reflector system concentrating energy utilizing two effects--one being that light passing through one focus of an ellipse will tend to line up with the major axis after each reflection, combined with the other in the properties of ellipses rotated off-axis having one distributed focus and one point focus. After a few reflections light having originally passed through one focus is, for practical purposes, running along the major axis even though the major axis is approached as an asymptote. This energy concentration system would be quite useful as a source of highly collimated light such as would be more practical for field surveying work than, for example, lasers, for optical alignment, and fiber-optic carrier media input. In addition to light some of these ellipsoidal reflector systems for concentration of energy are also effective for ultrasonics and/or shock waves.
Inventors
- 👤 James W. Downs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:40
CPC Classifications
F; F21; F21V; F21V7/00; F21V7/04; F21V7/08; G; G02; G02B; G02B19/00; G02B19/0004; G02B19/0019; G02B19/0023; G02B19/0033; G02B19/0047
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
136 words
An ellipsoidal reflector radiant energy concentration system comprising: (1) A primary ellipsoidal reflector formed by rotating an ellipse about an axis of rotation angularly displaced from the major axis of said ellipse and crossing said major axis at one of the focii of said ellipse resulting in a configuration wherein the geometrical solid formed has a distributed (i.e. circular) focus for its first focus and a second focus remains a fixed point; (2) A secondary reflector of a configuration comprising first and second focal points one of which may be at infinity (i.e. parabola) wherein said radiant energy concentrated from said primary ellipsoidal reflector towards said second fixed focal point of said primary ellipsoidal reflector is reflected back through said second focal point of said secondary reflector resulting in a highly collimated beam of radiant energy.
Claim 2
Dependent Claim
136 words
An ellipsoidal reflector radiant energy concentration system comprising: (1) A primary ellipsoidal reflector formed by rotating an ellipse about an axis of rotation angularly displaced from the major axis of said ellipse and crossing said major axis at one of the focii of said ellipse resulting in a configuration wherein the geometrical solid formed has a distributed (i.e. circular) focus for its first focus and a second focus remains a fixed point; (2) A secondary reflector of a configuration comprising first and second focal points one of which may be at infinity (i.e. parabola) wherein said radiant energy concentrated from said primary ellipsoidal reflector towards said second fixed focal point of said primary ellipsoidal reflector is reflected back through said second focal point of said secondary reflector resulting in a highly collimated beam of radiant energy.
Claim 3
Dependent Claim
49 words
The ellipsoidal reflector system of claim 1, wherein said structural means interconnecting said primary ellipsoidal reflector and said secondary reflector is a cylindrical enclosure fastened at one end to a rim of said primary ellipsoidal reflector; and with said cylindrical enclosure having an end wall mounting said secondary reflector.
Claim 4
Dependent Claim
23 words
The ellipsoidal reflector system of claim 1, wherein energy source means is in the form of a circle coexistent with said distributed focus.
Claim 5
Dependent Claim
30 words
The ellipsoidal reflector system of claim 3, wherein an opening is provided at the center end of said primary ellipsoidal reflector and with said major axis concentric with said opening.
Claim 6
Dependent Claim
20 words
The ellipsoidal reflector system of claim 3, wherein said energy souce means is an illumination tube of small tube diameter.
Claim 7
Dependent Claim
32 words
The ellipsoidal reflector system of claim 3, wherein said energy souce means is supported by pedestal means extended from the inner surface of said primary ellipsoidal reflector to said energy source means.
Claim 8
Dependent Claim
23 words
The ellipsoidal reflector system of claim 5, wherein said illumination tube is a circular gas discharge flash tube coexistent with said distributed focus.
Claim 9
Dependent Claim
33 words
The ellipsoidal reflector system of claim 6, wherein electric power leads are connected to said energy source means for the feeding of electric power to said energy source means from a power source.
Claim 10
Dependent Claim
34 words
The ellipsoidal reflector system of claim 4, wherein said opening is positioned to pass radiated energy reflected from said primary ellipsoidal reflector toward said second focal point and reflected back by said secondary reflector.
Claim 11
Dependent Claim
31 words
The ellipsoidal reflector system of claim 9, wherein said secondary reflector is an ellipsoid reflective section positioned to the opposite side of said second focal point from said primary ellipsoidal reflector.
Claim 12
Dependent Claim
32 words
The ellipsoidal reflector system of claim 10, wherein said secondary reflector is a hyperboloid reflector positioned between said second focal point and said primary ellipsoidal reflector in a Cassegrain compound reflective system.
Claim 13
Dependent Claim
20 words
The ellipsoidal reflective system of claim 4, wherein said opening is closed with a pane of radiation energy transparent material.
Claim 14
Dependent Claim
52 words
The ellipsoidal reflective system of claim 9, wherein a small ellipsoidal reflector section is provided at the center end of said primary ellipsoidal reflector; wtih said major axis concentric with said small ellipsoidal reflector section; and an opening is provided at the center of said secondary reflector concentric with said major axis.
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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) | 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 |