Optical system for use in a surgical apparatus
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A61N-005/06
출원번호
US-0214046
(1988-06-29)
우선권정보
FR-0009703 (1987-07-08)
발명자
/ 주소
Azema Alain (28
avenue des Arnes Nice FRX) Botineau Jean (5
avenue Chateaubriand Nice FRX) Moulin Grard (167
avenue Marchal Lyautey Nice FRX)
출원인 / 주소
Azema
Alain (Nice FRX 05) Arneodo
Jacques (Nice FRX 05) Botineau
Jean (Valbonne FRX 05) Crozafon
Philippe (Nice FRX 05) Moulin
Grard (Valbonne FRX 05)
인용정보
피인용 횟수 :
44인용 특허 :
0
초록▼
This invention relates to an optical system, adapted to be disposed between a source capable of emitting a beam of light and a target. Near the upstream focal point of the first optics for focussing the beam, the beam provides an image which is at least substantially in section, but which, due to ch
This invention relates to an optical system, adapted to be disposed between a source capable of emitting a beam of light and a target. Near the upstream focal point of the first optics for focussing the beam, the beam provides an image which is at least substantially in section, but which, due to characteristics inherent in the beam of light, produces an image which is oblong in shape at the downstream focal point of the first optics for focusing the beam. The optical system successively comprises, in the direction of propagation of the beam, downstream of the first optics, first diaphragm disposed near the focal point of the first focussing optics, capable of removing a variable part of the area of the section of the beam at the focal point, and second focussing optics. The optical system may further include a second diaphragm disposed upstream from the first optics for focusing the beam for further limiting the ellipticity of the beam. The invention is more particularly applicable to a surgical apparatus for modifying the curvature of the cornea.
대표청구항▼
An optical system to be disposed between a source capable of emitting a divergent beam of light and a target, said optical system including first optics for focusing said beam of light, wherein at the upstream focal point of said first optics, said beam produces an image which is at least substantia
An optical system to be disposed between a source capable of emitting a divergent beam of light and a target, said optical system including first optics for focusing said beam of light, wherein at the upstream focal point of said first optics, said beam produces an image which is at least substantially circular in section, but wherein due to the divergent nature of the beam of light, produces an image at the downstream focal point of said first focusing optics which has a section of oblong shape, wherein said optical system successively comprises, in the direction of propagation of said beam, downstream of said first optics, first shaping means disposed near the focal point of said first focusing optics, said first shaping means obscuring a variable part of said beam, and second focusing optics, with the result that, for any relative displacement of the target and said optical system wherein said target is within about one focal length of said second focusing optics, the area of said beam removed by said first shaping means is adjustable so as to obtain, at the level of the target, a section of beam which remains at least substantially circular, wherein said first shaping means are constituted by a diaphragm disposed transversely to the direction of propagation of the beam, said diaphragm including a slot, the width of said slot uninterruptingly varying between zero and the largest dimension of the oblong section of the beam at the location of said first shaping means, and said optical system further comprises means for displacing said diaphragm relative to the rest of said system transverse to the direction of propagation of the beam.
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