Semifinished lens
AssigneeHoya Lens Thailand Ltd.
InventorsYoshihiro Kikuchi, Shinichi Yokoyama
Life of this patent
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Abstract
A semifinished lens is configured with at least three marks for specifying the center position of a frame shape. When the semifinished lens is viewed in an optical axis direction, the at least three marks include a pair of marks located on a first straight line passing through the center position and a mark located on a second straight line that is orthogonal to the first straight line and passes through the center position.
Claims8
A semifinished lens comprising at least three marks for specifying a center position of a frame shape and a film including an electrochromic layer between a pair of electrode layers,
- wherein when the semifinished lens is viewed in an optical axis direction, the at least three marks include a pair of marks located on a first straight line passing through the center position and a mark located on a second straight line that is orthogonal to the first straight line and passes through the center position,
- the film has the frame shape,
- positions of the at least three marks are determined based on an actual measurement of a position of the film attached to the semifinished lens, and
- and the at least three marks are made after the film is attached to the semifinished lens.
Dependencies are inferred from the claim text.