Abstract: An optical lens system including: a first lens including a more than half part of a substantially spherical first lens body having a first diameter and a substantially flat first boundary surface; a second lens including a more than half part of a substantially spherical second lens body having a second diameter and a substantially flat second boundary surface, the second diameter being smaller than the first diameter; and a lens holder comprising a first and a second mount for, respectively, the first and second lens, wherein the first an the second mounts comprise, respectively, a first and a second circular cylindrical inner wall having a common center line, a diameter of the first inner wall and a diameter of the second inner wall being substantially equal to, respectively, the first and the second diameters.

Abstract: The invention relates to an optical lens system (39) which is suitable for use in an optical scanning device (15) for an optical disc player. The lens system (39) comprises a first lens or objective lens (45) and a second lens or auxiliary lens (47) which are mounted in fixed positions in a lens holder (61). The objective lens comprises more than one half of a first spherical lens body (67) having a first diameter (D1), and the auxiliary lens comprises more than one half of a second spherical lens body (69) having a second diameter (D2) smaller than the first diameter. The objective lens and the auxiliary lens are surrounded by, respectively, a first circular cylindrical inner wall (83) and a second circular cylindrical inner wall (85) of the lens holder having a diameter which is substantially equal to the first and the second diameter, respectively. Said inner walls can be provided in the lens holder in very accurate coaxial positions by means of conventional tools.

Abstract: An injection syringe having a cartridge with a hollow injection needle attached thereto; a vial which contains a medicament, closed by a pierceable stopper; and a telescopic assembly which detachably connects the cartridge to the vial. The telescopic assembly consists of two telescopic members, the inner member being detachably connected by an inner and an outer collar to the cartridge, and the outer member being connected to the vial by a snap connection.