Abstract: A method of manufacturing a mould for producing a customized optical surface, whereby a mould (1, 2) having a base shape is modified in order to obtain the required shape of the mould. The modificaiton is carried out by means of a lithographic process comprising coating the mould surface with a photoresist layer (16), exposing the layer to a predetermined pattern of exposure radiation (9) and developing the exposed layer whereby portions of the layer are removed to obtain the required mould shape (22). This method may be used for producing small quantities of optical surfaces, such as for individual contact lenses.

Abstract: This invention relates to a lamp-reflector unit (3) provided with a first (15) and a second filament (17) axially disposed on a lamp axis (1), and a circularly symmetrical reflector (7) with a reflecting part (13). The use of a modified low-voltage H4 automotive halogen lamp leads to a relatively cheap lamp-reflector unit for application in shop and home lighting enabling direct switching from spot-lighting to flood-lighting.