Spectacle lens with high positive refractive power

US4504128A · kind A · utility

Assignee

• Optische Werke G. Rodenstock · DE

Inventors

• Gunther Guilino · Munich, DE
• Rudolf Barth · Hohenkirchen, DE
• Werner Koppen · Gröbenzell, DE

Key dates

• Filing date: Jul 8, 1982
• Grant date: Mar 12, 1985
• Expiry date: Jul 8, 2002

Classification

• Technology area (CPC G): Physics
• CPC primary: G02C7/02
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A spectacle lens with a high positive refracting power, whose front surface has an aspheric, rotationally symmetric effective part. The effective part is configured in accordance with the following equation: ##EQU1## where z is the sagitta, h is the distance from the optical axis, C is determined by the desired refracting power of the front surface at the vertex, and K and I.sub.i are aspheric coefficients. The aspheric coefficients K and I.sub.i are determined so that either the visual acuity V is a maximum or .vertline..DELTA.R.vertline.+.vertline..DELTA.S.vertline. is a minimum. The lens produces a pattern of aberration which allows complete utilization of the visual field for dynamic vision.