Optical assembly for a wide field of view point action camera with low astigmatism
First Claim
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1. An optical assembly for a point action camera having a wide field of view, comprising multiple lens elements configured to provide a field of view in excess of 120 degrees that comprises a longitudinal astigmatism of 0.7 mm or less, wherein said multiple lens elements comprise, from object end to image end:
- a convexo-concave or meniscus lens;
a convexo-concave or quasi-convexo-concave or plano-concave or meniscus lens;
a biconvex or convexo-plano or convexo-quasi-convex or quasi-convexo-convex lens;
an aperture stop;
a biconvex or plano-convex or quasi-convexo-convex lens;
a biconcave-biconvex or a convexo-concave-biconvex or a plano-concave-biconvex or a quasi-plano-concave-biconvex doublet lens element;
a biconvex or convexo-plano or convexo-quasi-convexo lens.
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Abstract
An optical assembly for a point action camera with a wide field of view includes multiple lens elements configured to provide a field of view in excess of 150 degrees. One or more lens elements has an aspheric surface. The optical assembly exhibits a low longitudinal astigmatism of approximately 0.3 mm or less.
265 Citations
24 Claims
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1. An optical assembly for a point action camera having a wide field of view, comprising multiple lens elements configured to provide a field of view in excess of 120 degrees that comprises a longitudinal astigmatism of 0.7 mm or less, wherein said multiple lens elements comprise, from object end to image end:
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a convexo-concave or meniscus lens; a convexo-concave or quasi-convexo-concave or plano-concave or meniscus lens; a biconvex or convexo-plano or convexo-quasi-convex or quasi-convexo-convex lens; an aperture stop; a biconvex or plano-convex or quasi-convexo-convex lens; a biconcave-biconvex or a convexo-concave-biconvex or a plano-concave-biconvex or a quasi-plano-concave-biconvex doublet lens element; a biconvex or convexo-plano or convexo-quasi-convexo lens. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification