Source: http://www.google.com/patents/US8072692?dq=U.S.+patent+number+7,325,728
Timestamp: 2016-10-25 14:13:45
Document Index: 131186718

Matched Legal Cases: ['application no. 10', 'art 9', 'art 9', 'art 9', 'art 9', 'application No. 94145070']

Patent US8072692 - Lens, laser arrangement and method for producing a laser arrangement - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsAn aspherical planoconvex lens (20), containing a material with a refractive index of at least 3.0, in which the height (h) of the convex region (21) is a maximum of one fifth of the thickness (1) of the lens (20). Also disclosed is a laser assembly incorporating such a lens and a method for the manufacture...http://www.google.com/patents/US8072692?utm_source=gb-gplus-sharePatent US8072692 - Lens, laser arrangement and method for producing a laser arrangementAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS8072692 B2Publication typeGrantApplication numberUS 11/793,259PCT numberPCT/DE2005/002235Publication dateDec 6, 2011Filing dateDec 12, 2005Priority dateDec 21, 2004Fee statusPaidAlso published asDE102005006052A1, DE502005011057D1, EP1828828A1, EP1828828B1, US20110102914, WO2006066543A1Publication number11793259, 793259, PCT/2005/2235, PCT/DE/2005/002235, PCT/DE/2005/02235, PCT/DE/5/002235, PCT/DE/5/02235, PCT/DE2005/002235, PCT/DE2005/02235, PCT/DE2005002235, PCT/DE200502235, PCT/DE5/002235, PCT/DE5/02235, PCT/DE5002235, PCT/DE502235, US 8072692 B2, US 8072692B2, US-B2-8072692, US8072692 B2, US8072692B2InventorsUlrich Steegm�ller, Frank Singer, Guido WeissOriginal AssigneeOsram Opto Semiconductors GmbhExport CitationBiBTeX, EndNote, RefManPatent Citations (33), Non-Patent Citations (6), Classifications (18), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetLens, laser arrangement and method for producing a laser arrangement
US 8072692 B2Abstract
An aspherical planoconvex lens (20), containing a material with a refractive index of at least 3.0, in which the height (h) of the convex region (21) is a maximum of one fifth of the thickness (1) of the lens (20). Also disclosed is a laser assembly incorporating such a lens and a method for the manufacture of such a laser assembly.
16. A laser assembly according to claim 15, in which the semiconductor chip is fastened to the lead frame by means of a hard solder joint.
21. A method according to claim 20, in which the lens has two plane surfaces on opposite sides that have a length of at least 350 μm in the direction of the optical axis of the lens.
This is a U.S. national stage of application No. PCT/DE2005/002235, filed on Dec. 12, 2005.
This patent application claims the priority of German patent application no. 10 2004 061 576.4 filed Dec. 21, 2004 and 10 2005 006 052.8 filed Feb. 10, 2005, the disclosure content of which is hereby incorporated by reference.
It is an object of the present invention to provide a lens that can be used in particularly various ways. It is, moreover, another object of the present invention to provide a laser apparatus having such a lens and a method for the manufacture of a laser apparatus of this type.
Here y is the axially symmetric curve, c is the aspherical factor, R is radius of curvature, while a2, a4, a6 are higher-order coefficients. Favourably at least some of the higher-order coefficients are chosen to be unequal to zero. In this way, a particularly flat, aspherically curved region can be achieved, and the lens is then characterized by relatively low spherical aberration.
In at least one embodiment of the lens, the lens contains a semiconductor material. Favourably, the semiconductor material has a refractive index of at least 3.0. It is particularly favourable if the semiconductor material has this refractive index for electromagnetic radiation in the range of wavelengths between 800 and 950 nm. It is, for instance, possible for the body of the lens to consist entirely of semiconductor material. At least one part of the surface of the lens can, then, for instance, be coated with another material.
According to at least one embodiment of the laser assembly, the semiconductor chip corresponds to one of the following components: a light-emitting diode chip, laser bar, semiconductor laser chip. Preferably, the semiconductor chip is suitable for generating laser radiation in a range of wavelengths between 800 and 950 nm. It is particularly favourable if the semiconductor chip can generate laser radiation continuously (cw mode). The power consumption of the semiconductor chip is favourably at least 20 W.
The shaping of the aspherical surface 22 of the lens 20 can be achieved in accordance with the disclosure in DE 101 42 010, the subject matter of which is hereby incorporated by reference.
Depending on the selection of the lens parameters such as the radius of curvature R, the aspherical factor c, higher order coefficients, the lens thickness l and the height h of the convex region 21, it is possible to manufacture a planoconvex aspherical lens 20 with the desired collimation and the desired numerical aperture.
In the context of the application, the term “quantum well structure” refers to any structure in which charge carriers experience a quantization of its energy states as a result of confinement. In particular, the term “quantum well structure” says nothing about the dimensionality of the quantization. It therefore includes, among other things, quantum wells, quantum wires, quantum dots and any combination of these structures.
A housing part 9 is moulded to the lead frame 8, containing a plastic such as PEEK (polyetheretherketone) or a temperature-resistant LCP (liquid crystal polymer). Favourably, the housing part 9 is moulded to the lead frame 8 before the semiconductor chip is fastened to the lead frame 8. The housing part 9 favourably surrounds at least part of the lead frame 8. The housing part 9 can, for instance, be manufactured by injection moulding, transfer moulding or through a pressure casting process.
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M. Strzelecka et al., "Fabrication of refractive microlenses in semiconductors by mask shape transfer in reactive ion etching", Microelectronic Engineering, Elselvier Publishers BV, vol. 35, No. 1, pp. 385-388, Feb. 1997.2English translation of Taiwanese Examination Report for the corresponding application No. 94145070.3K. J. McIntyre et al., "High-NA, Anamorphic or Aspheric Microlenses for Telecommunications and Data Storage", Trends in Optics and Photonics. Diffractive Optics and Micro-Optics Technical Digest, Postconference Edition, vol. 41, No. 18, pp. 278-280, Jun. 18, 2000.4S. Nemoto et al., "Transformation of Waist Parameters of a Gaussian Beam by a Thick Lens", Applied Optics, OSA, Optical Society of America, Washington, DC, vol. 29, No. 6, pp. 809-816, Feb. 20, 1990.5Z. L. Liau et al, "Simple Compact Diode-Laser/Microlens Packaging", IEEE Journal of Quantum Electronics, IEEE Service Center, Piscataway, NJ, vol. 33, No. 3, pp. 457-461, Mar. 1997.6Z.L. Liau et al., "Accurate Fabrication of Anamorphic Microlenses and Efficient Collimation of Tapered Unstable-Resonator Diode Laser", Applied Physics Letters, American Institute of Physics, Melville, NY, vol. 64, No. 25, pp. 3368-3370, Jun. 20, 1994.Classifications U.S. Classification359/718, 359/719, 359/708International ClassificationG02B13/18Cooperative ClassificationH01S5/02288, H01S5/02469, G02B7/028, Y10T29/49002, H01S5/005, G02B3/04, H01S5/02492, G02B6/4206, H01S5/02272, H01S5/0224, H01S5/02244European ClassificationG02B6/42C3B, G02B7/02T, G02B3/04Legal EventsDateCodeEventDescriptionJan 9, 2008ASAssignmentOwner name: OSRAM OPTO SEMICONDUCTORS GMBH, GERMANYFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:STEEGMULLER, ULRICH;SINGER, FRANK;WEISS, GUIDO;SIGNING DATES FROM 20071031 TO 20071128;REEL/FRAME:020340/0361May 28, 2015FPAYFee paymentYear of fee payment: 4RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services