US3926501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for directing light to illuminating fiber optical system
Assignee: Olympus Corp
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Filing: 1971-10-18
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Granted: 1975-12-16
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Expires: 1991-10-18
Abstract
Abstract Device for directing light from a light source to an illuminating fiber optical system using a reflecting mirror in the form of an ellipsoid of revolution. The light source is located at one of the focal points of the ellipsoid of revolution while the other of the focal points is located in the light receiving end surface of the fiber optical system. The axis of the ellipsoid of revolution is offset at an acute angle from the axis of the light receiving end portion of the fiber optical system passing at right angles substantially through the center of the end surface so that the light emitted from the fiber optical system to the center zone of the area illuminated is weakened while the intensity of light in the marginal zone of the area is increased thereby obtaining uniform illumination of the area.
Inventors
- 👤 Hiroyuki Hama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:21
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/42; G02B6/4298
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
197 words
An illuminiating device comprising: a. a fiber optical system having a light receiving first end face, a light emitting second end face, and an axis perpEndicular to said first end face substantially in the center of said first end face; b. a light source having a spot of greatest brightness; and c. mirror means for focusing the light of said source on said first end face, 1. said mirror means having a reflecting face in the form of an ellipsoid of revolution about an axis of revolution and having two focal points spaced along said axis of revolution, 2. said focal points substantially coinciding with said spot of greatest brightness and with said first end face respectively, whereby light of said source is emitted from said second end face for illuminating an adjacent area, 3. said axis of revolution being inclined relative to said axis of said fiber optical system at an angle of inclination of approximately 20*, whereby the distribution of light over said area is more uniform than at an angle of inclination smaller than 20* and the light transmitting efficiency of said system is greater than at an angle of inclination greater than 20*.
Claim 2
Dependent Claim
197 words
An illuminiating device comprising: a. a fiber optical system having a light receiving first end face, a light emitting second end face, and an axis perpEndicular to said first end face substantially in the center of said first end face; b. a light source having a spot of greatest brightness; and c. mirror means for focusing the light of said source on said first end face, 1. said mirror means having a reflecting face in the form of an ellipsoid of revolution about an axis of revolution and having two focal points spaced along said axis of revolution, 2. said focal points substantially coinciding with said spot of greatest brightness and with said first end face respectively, whereby light of said source is emitted from said second end face for illuminating an adjacent area, 3. said axis of revolution being inclined relative to said axis of said fiber optical system at an angle of inclination of approximately 20*, whereby the distribution of light over said area is more uniform than at an angle of inclination smaller than 20* and the light transmitting efficiency of said system is greater than at an angle of inclination greater than 20*.
Claim 3
Dependent Claim
26 words
An illuminating device as set forth in claim 1, wherein one of said focal points is located substantially in the center of said first end face.
Claim 4
Dependent Claim
35 words
said focal points substantially coinciding with said spot of greatest brightness and with said first end face respectively, whereby light of said source is emitted from said second end face for illuminating an adjacent area,
Claim 5
Dependent Claim
35 words
said focal points substantially coinciding with said spot of greatest brightness and with said first end face respectively, whereby light of said source is emitted from said second end face for illuminating an adjacent area,
Claim 6
Dependent Claim
16 words
A device as set forth in claim 1, said light source being a xenon short-arc lamp.
Claim 7
Dependent Claim
62 words
said axis of revolution being inclined relative to said axis of said fiber optical system at an angle of inclination of approximately 20*, whereby the distribution of light over said area is more uniform than at an angle of inclination smaller than 20* and the light transmitting efficiency of said system is greater than at an angle of inclination greater than 20*.
Claim 8
Dependent Claim
62 words
said axis of revolution being inclined relative to said axis of said fiber optical system at an angle of inclination of approximately 20*, whereby the distribution of light over said area is more uniform than at an angle of inclination smaller than 20* and the light transmitting efficiency of said system is greater than at an angle of inclination greater than 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) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |