Optical assembly for a wide field of view point action camera with a low sag aspheric lens element
First Claim
1. An optical assembly for a point action camera having a wide field of view, comprising multiple lens elements, including an aspheric surface with an approximately 30 microns or less sag and an approximately 25 microns/millimeter or less aspheric sag slope, configured to provide a field of view in excess of 150 degrees, andwherein the optical assembly comprises from object end to image end a first optical group and a second optical group, wherein the first optical group is configured to collect light at said wide field of view and said second optical group is configured to correct distortion error, andwherein said aspheric surface to correct astigmatism error, andwherein said aspheric surface includes a point of inflection of aspheric slope extremum at a radial distance from a center of said aspheric surface that is less than approximately 0.5×
- a center to edge radius of said aspheric surface.
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Accused Products
Abstract
An optical assembly for a point action camera with a wide field of view has multiple lens elements configured to provide a field of view in excess of 150 degrees. One or more lens elements has an aspheric surface with an approximately 30 microns or less sag and an approximately 25 microns/millimeter or less aspheric sag slope.
262 Citations
64 Claims
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1. An optical assembly for a point action camera having a wide field of view, comprising multiple lens elements, including an aspheric surface with an approximately 30 microns or less sag and an approximately 25 microns/millimeter or less aspheric sag slope, configured to provide a field of view in excess of 150 degrees, and
wherein the optical assembly comprises from object end to image end a first optical group and a second optical group, wherein the first optical group is configured to collect light at said wide field of view and said second optical group is configured to correct distortion error, and wherein said aspheric surface to correct astigmatism error, and wherein said aspheric surface includes a point of inflection of aspheric slope extremum at a radial distance from a center of said aspheric surface that is less than approximately 0.5×
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53. An aspheric lens element for an optical assembly of a wide field of view point action camera, comprising an aspheric surface with an approximately 30 microns or less sag and an approximately 25 microns/millimeter or less aspheric sag slope, and
wherein said aspheric surface includes a point of inflection of aspheric slope extremum at a radial distance from a center of said aspheric surface that is less than approximately 0.5× - a center to edge radius of said aspheric surface.
- View Dependent Claims (54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64)
Specification