US5485317A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical system for light emitting diodes
Assignee: Solari Udine SpA
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Filing: 1993-10-08
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Granted: 1996-01-16
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Expires: 2013-10-08
Abstract
Abstract The diode is incorporated in a fixed manner on the optical axis of a carrier lens. The carrier lens consists of a front portion with an outer transverse surface, formed concave towards the emitted light, and a longitudinal portion for incorporating he diode. The longitudinal portion has its outer longitudinal surface formed concave towards the diode. The concave transverse surface is surrounded by a further outer transverse system. The concave longitudinal surface is arranged to reflect the diode-emitted light rays towards the further outer transverse surface, which is arranged to transmit the light rays to the outside in a longitudinal direction.
Inventors
- 👤 Claudio Perissinotto
- 👤 Antonio Fiorentini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:54
CPC Classifications
H; H10; H10H; H10H20/00; H10H20/80; H10H20/85; H10H20/852; H10H20/853; G; G02; G02B; G02B19/00; G02B19/0004; G02B19/0028; G02B19/0033; G02B19/0047; G02B19/0061; G02B6/00; G02B6/0001; H10H20/855; F; F21; F21V; F21V7/00; F21V7/0091; F21Y; F21Y2115/00; F21Y2115/10; H10H20/856
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
126 words
An optical system for a light emitting diode (13) which is incorporated in a fixed manner on an optical axis (14) of a carrier lens (12), said carrier lens (12) consisting of a front portion (18) with an outer transverse surface (25) formed concave towards emitted light, and for incorporating the diode (13), a longitudinal portion (19) with an outer longitudinal surface (22), wherein said outer longitudinal surface (22) is formed concave towards the diode (13) and is coaxial to the optical axis (14) of the carrier lens and said concave transverse surface (25) having a further outer transverse surface (24) circumscribed thereto characterised in that said outer longitudinal surface (22) has an ellipsoidal form and said further outer transverse surface (24) has a curved form.
Claim 2
Dependent Claim
126 words
An optical system for a light emitting diode (13) which is incorporated in a fixed manner on an optical axis (14) of a carrier lens (12), said carrier lens (12) consisting of a front portion (18) with an outer transverse surface (25) formed concave towards emitted light, and for incorporating the diode (13), a longitudinal portion (19) with an outer longitudinal surface (22), wherein said outer longitudinal surface (22) is formed concave towards the diode (13) and is coaxial to the optical axis (14) of the carrier lens and said concave transverse surface (25) having a further outer transverse surface (24) circumscribed thereto characterised in that said outer longitudinal surface (22) has an ellipsoidal form and said further outer transverse surface (24) has a curved form.
Claim 3
Dependent Claim
24 words
An optical system as claimed in claim 1, characterised in that said further outer transverse surface (24) which has a curved form is spherical.
Claim 4
Dependent Claim
24 words
An optical system as claimed in claim 1, characterised in that said further outer transverse surface (24) which has a curved form is ellipsoidal.
Claim 5
Dependent Claim
26 words
An optical system as claimed in claim 1, characterised in that said emitting diode is positioned between the focal point of said outer transverse surface (22).
Claim 6
Dependent Claim
140 words
An optical system as claimed in claim 1, characterised in that said carrier lens (12) consists of an outer lens element (17), an inner lens (26) carrying the diode (13) and an intermediate lens (20), in which the said outer lens element (17) has an external configuration corresponding to that of said carrier lens (12) and is provided internally with a cavity (21) bounded in a longitudinal direction by a front part and in a direction perpendicular to the optical axis (14) by a longitudinal part, said inner lens (26) being integrated into said cavity (21) such that said intermediate lens (20) is positioned between the inner lens (26) and the outer lens element (17) and is arranged to fix the inner lens (26) to the outer lens element (17) so that there are no gaps in the cavity (21).
Claim 7
Dependent Claim
41 words
An optical system as claimed in claim 5, characterised in that said inner lens (26) comprises at its front part a surface (15) concave towards the emitted light and at its longitudinal part a surface (16) having cylindrical or frusto-conical form.
Claim 8
Dependent Claim
65 words
An optical system as claimed in claim 5, characterised in that the outer lens element (17) is shaped so that the front part is in the form of a meniscus cup which is concave towards emitted light, the longitudinal part being shaped such that the cavity (21) is in the form of a frustum of a cone with its minor diameter towards the front part.
Claim 9
Dependent Claim
52 words
An optical system as claimed in claim 5, characterised in that the outer lens element (17) is provided in the cavity (21) with a plurality of longitudinal guides (23) arranged to position the inner lens (26) within the cavity (21) so that the diode (13) is always on the optical axis (14).
Claim 10
Dependent Claim
35 words
An optical system as claimed in claim 5, characterised in that the carrier lens (12) are made of an injection-mouldable transparent polymer, the intermediate lens (20) being obtained by in-situ polymerization of a thermosetting resin.
Claim 11
Dependent Claim
39 words
An optical system as claim in claim 5, characterised in that said intermediate lens (20) has an absolute refractive index is different from the absolute refractive index of the inner lens (26) and of the outer lens element (17).
Claim 12
Dependent Claim
39 words
An optical system as claimed in claim 10, characterised in that intermediate lens (20) has an absolute refractive index of between 1.33 and 1.48 the absolute refractive index of the outer lens element (17) being between 1.49 and 1.63.
Claim 13
Dependent Claim
32 words
An optical system as claimed in claim 5, characterised in that the outer lens element (17) forms part of a group of outer lens elements (17), which together form a single piece.
Claim 14
Dependent Claim
18 words
An optical system as claimed in claim 1, characterised in that said outer longitudinal surface (22) is aluminized.
Claim 15
Dependent Claim
34 words
An optical system as claimed in claim 11, characterised in that intermediate lens (20) has an absolute refractive index of 1.415, and an absolute refractive index of the outer lens element (17) of 1.59.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-01-15 | 1999-07-17 | 2000-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-01-15 | 2003-07-17 | 2004-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-01-15 | 2007-07-17 | 2008-01-16 | $7700.00 | Window Closed / Lapsed |