Initial set-up procedure for an auto-focus lens

• Main Author: FERSCHL; MICHAEL S
• Format: Patent
• Language: English
• Published: 15.06.1993
• Subjects: APPARATUS SPECIALLY ADAPTED THEREFOR; CINEMATOGRAPHY; COLOUR PRINTING; CORRECTION OF TYPOGRAPHICAL ERRORS; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; ELECTROGRAPHY; HOLOGRAPHY; i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; LINING MACHINES; MATERIALS THEREFOR; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; ORIGINALS THEREFOR; PERFORMING OPERATIONS; PHOTOGRAPHY; PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES,e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTORDEVICES; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; PRINTING; PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; SELECTIVE PRINTING MECHANISMS; STAMPS; TRANSPORTING; TYPEWRITERS

An imaging system comprising a source of light movable with respect to an image carrier element and projectable thereon to generate an image, and an auto-focusing system for focusing the image-generating light source. The auto-focus system includes a second beam of light of a wavelength selected not...