Method and apparatus for reactive optical correction of galvano motor scanning heads

US8233207B2 · kind B2 · utility

Assignee

• abariscan GmbH · DE

Inventors

• Stephen Hastings · Munich, DE
• Stephen Coles · Worplesdon, GB

Key dates

• Filing date: Aug 6, 2007
• Grant date: Jul 31, 2012
• Expiry date: Apr 19, 2028

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B27/0031
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

This invention relates to a method of optical correction of field position distortions created by galvano motor scanning heads. In addition, the invention relates to the apparatus and method to achieve a calibration of said field positions to overcome said distortions generated by the delivery optics within a galvano motor scanning head using a pre-calibrated target that may be positioned into a registration or ‘lay’ system for ease of identifying and measuring said series of marks by removal and replacing said pre-calibrated target into said registration or ‘lay’ system, pre-determined logic means to generate a series of marks on said pre-calibrated target using said galvano motor scanning head and said galvano motor scanning head control apparatus and operator input so that said logic means may calculate from a minimum number of operator entries corresponding to said series of marks on said pre-calibrated target that may be positioned into said registration or ‘lay’ system for ease of identifying and measuring said series of marks by removal and replacing said pre-calibrated target into said registration or ‘lay’ system a full field correction of the field position distortions ta…