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Machine translation
1. (WO1982000529) AN OPTICAL SYSTEM FOR PROJECTION
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1982/000529    International Application No.:    PCT/SE1981/000223
Publication Date: 18.02.1982 International Filing Date: 29.07.1981
IPC:
G02B 27/18 (2006.01)
Applicants: OPTIK INNOVATION AB IOAB.
ASTERÖ, Ulf, Jan-Erik;
Inventors: ASTERÖ, Ulf, Jan-Erik;
Priority Data:
Title (EN) AN OPTICAL SYSTEM FOR PROJECTION
(FR) SYSTEME OPTIQUE DE PROJECTION
Abstract: front page image
(EN)An optical system for projection with a projector apparatus intended to project an image on a screen made with negative curvature includes a single, generally concavo-convex lens, both surfaces of which are aspherically corrected, and the front surface of which is oriented towards the plane of the object. The lens is provided with a diaphragm arranged behind the lens at a distance therefrom at least amounting to that of the diaphragm aperture. The display screen preferably has the form of a hyperboloid with splayed-out edges. The optical system is made with a numerical aperture of 0.09 and is intended to afford an enlargement of 6 to 10 times for objects of the format 190 x 250 mm. The optical system is suitably adapted for an overhead projector and has a Gauss focal length of 230 mm. The lens can be made from methyl methacrylate.
(FR)Un systeme optique de projection avec un projecteur destine a projeter une image sur un ecran ayant une courbure negative comprend une lentille simple, de forme generale concave-convexe, dont les deux surfaces ont une correction de sphericite, et dont la surface ayant est orientee vers le plan de l'objet. La lentille est pourvue d'un diaphragme dispose derriere la lentille a une distance au moins egale a celle de l'ouverture du diaphragme. L'ecran de projection a de preference la forme d'un hyperboleide avec des bords evases. Le systeme optique possede une ouverture numerique de 0,09 et peut permettre un agrandissement de 6 a 10 fois pour des objets d'un format de 190 x 250 mm. Le systeme optique s'adapte particulierement a un projecteur aerien et possede une distance focale de Gauss de 230mm. La lentille peut etre constituee de methacrylate de methyle.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)