[특허]Optical system with reduced back reflection

[미국특허] Optical system with reduced back reflection 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G02B-006/32 G02B-006/26
출원번호	US-0781466 (2004-02-17)
발명자 / 주소	Chen,Bo Su
출원인 / 주소	Finisar Corporation
대리인 / 주소	Workman Nydegger
인용정보	피인용 횟수 : 9 인용 특허 : 238

초록 ▼

An optical system is adapted to produce reduced back reflection from a receiving detector back to a light source for increased system performance. The system may optically condition light signals from the light source for projection onto the detector. The conditioning may result in a light spot on the detector that has an annular intensity distribution or profile. The annular distribution may be attained in any number of ways including providing a slope discontinuity in the lens surface, providing an ax icon lens function, and/or providing a defocused light spot on the detector surface.

대표청구항 ▼

What is claimed is: 1. An optical coupler comprising: an optical element having a substantially flat side and a substantially convex side; a detector spaced from the convex side of the optical element; and an optical fiber positioned adjacent to the substantially flat side of the optical element wherein the substantially flat side of the optical element is oriented substantially perpendicular to an optical axis associated with the optical coupler and the optical element is adapted to direct light delivered by the optical fiber to the spaced detector such that light that is reflected by the detector does not substantially couple back into the optical fiber wherein the optical element is adapted to produce at least a partial annular shaped light pattern on the detector. 2. The optical coupler of claim 1 wherein the optical fiber abuts the substantially flat side of the optical element. 3. An optical coupler according to claim 1 wherein the optical fiber includes a core that has an index of refraction that at least substantially matches an index of reaction of the optical element. 4. The optical coupler of claim 1, wherein the substantially convex side of the optical element has a discontinuous slope. 5. The light optical coupler of claim 4, wherein the substantially convex side of the optical element is grooved. 6. An optical coupler comprising: an optical element having a substantially flat side and a substantially convex side: a detector spaced from the convex side of the optical element; and an optical fiber positioned adjacent to the substantially flat side of the optical element wherein the substantially flat side of the optical element is oriented substantially perpendicular to an optical axis associated with the optical coupler and the optical element is adapted to direct light delivered by the optical fiber to the space detector such that light that is reflected by the detector does not substantially couple back into the optical fiber wherein the optical element is adapted to produce an annular light pattern on the detector. 7. An optical coupler comprising: an optical element having a substantially flat side and a substantially convex side; a detector spaced from the convex side of the optical element; and an optical fiber positioned adjacent to the substantially flat side of the optical element wherein the substantially flat side of the optical element is oriented perpendicular to an optical axis associated with the optical coupler and the optical element is adapted to direct light delivered by the optical fiber to the spaced detector such that light that is reflected by the detector does not substantially couple back into the optical fiber wherein the optical element includes a focal point and the detector is positioned relative to the optical element such that the light from the optical element is not defocused on the detector. 8. A light transmission system comprising: a light source; a detector; and an optical element positioned between the light source and the detector; wherein the optical element is configured to direct more than half of the light that is transmitted from the light source onto the detector, and to direct less than half of the light that is reflected by the detector back to the light source, and wherein the optical element is configured to produce an annular light pattern on the detector wherein the lens has a substantially plano-convex shape. 9. The light transmission system of claim 8 wherein said optical element has a focal point that is in front of the detector. 10. The light transmission system of claim 8 wherein said optical element has a focal point that is behind the detector. 11. The light transmission system of claim 8 wherein said optical element comprises a lens that is shaped to produce an annular light pattern on the detector. 12. The light transmission system of claim 8 wherein said light source includes an optical fiber. 13. The light transmission system of claim 8 wherein said light source includes a laser. 14. The light transmission system of claim 8 wherein said light source includes a Light Emitting Diode (LED). 15. The light transmission system of claim 8 wherein the optical element is further configured to diverge the light received from the light source as it is transmitted through the optical element. 16. The light transmission system of claim 8 wherein the light source abuts a surface of the optical element. 17. The light transmission system of claim 16 wherein the light source is an optical fiber and an index of refraction of the optical element matches or substantially matches an index of refraction of the optical fiber. 18. The light transmission system of claim 8, wherein said optical element has a focal point wherein the light has a non-annular intersity profile at the focal point. 19. An optical coupler comprising: an optical element having a substantially flat side and a substantially convex side; a detector spaced from the convex side of the optical element; and an optical fiber positioned adjacent to the substantially flat side of the optical element wherein the substantially flat side of the optical element is oriented perpendicular to an optical axis associated with the optical coupler and the optical element is adapted to direct light delivered by the optical fiber to the spaced detector such that light that is reflected by the detector does not substantially couple back into the optical fiber wherein the substantially convex side has a slope discontinuity that is located proximate the optical axis. 20. The optical coupler of claim 19, wherein the slope discontinuity comprises a curvature discontinuity of the substantially convex side.

이 특허에 인용된 특허 (238) 인용/피인용 타임라인 분석

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Optical system with reduced back reflection 원문보기

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[미국특허] Optical system with reduced back reflection 원문보기

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이 특허에 인용된 특허 (238) 인용/피인용 타임라인 분석

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