Block device, spectacle lens manufacturing method, and program

Patent metadata

Field	Value
Publication number	US-2019299355-A1
Application number	US-201916446144-A
Country	US
Kind code	A1
Filing date	Jun 19, 2019
Priority date	Dec 26, 2013
Publication date	Oct 3, 2019
Grant date	—

Abstract

Provided is a block device that mounts a lens shape processing lens holder to a convex surface of a spectacle lens with two alignment reference marks for identifying a distance portion design reference point on a concave surface. The block device includes an imaging unit that images the alignment reference marks of the spectacle lens supported by a support unit from a convex surface side of the spectacle lens, an information processing unit that obtains expected imaged positions of the alignment reference marks imaged by the imaging unit, using information regarding the spectacle lens, when a posture of the spectacle lens supported by the support unit becomes a reference posture suitable for mounting the lens holder, and a display control unit that displays images of index marks indicating the expected imaged positions obtained in the information processing unit and images of the alignment reference marks.

First claim

1 . A spectacle lens manufacturing method including a block process of mounting a lens shape processing lens holder to a convex surface of a spectacle lens, using a support unit that supports the spectacle lens with two alignment reference marks for identifying a distance portion design reference point formed on a concave surface, an imaging unit that images the alignment reference marks of the spectacle lens supported by the support unit from a convex surface side of the convex surface of the spectacle lens, and a monitor that displays an image,
the block process comprising: a process of causing the support unit to support the spectacle lens; a process of obtaining expected imaged positions of the alignment reference marks imaged by the imaging unit, using information regarding the spectacle lens, when a posture of the spectacle lens supported by the support unit becomes a reference posture suitable for mounting the lens holder; a process of performing position adjustment of the spectacle lens to position images of the alignment reference marks actually imaged by the imaging unit to images of index marks indicating the expected imaged positions, while displaying the images of the index marks and the images of the alignment reference marks; and a process of mounting the lens holder to the convex surface of the spectacle lens that has undergone the position adjustment.

2 . A non-transitory computer-readable recording medium storing a program for causing a computer to execute processing of identifying a position where two alignment reference marks are viewed, when a spectacle lens with the two alignment reference marks for identifying a distance portion design reference point formed on a concave surface are viewed from a convex surface side of a convex surface of the spectacle lens, the program for causing the computer to execute processing comprising:
a step A of calculating coordinate values indicating positions of the two alignment reference marks, in a coordinate system where a holder mounting center position that serves as a reference for mounting a lens shape processing lens holder to the convex surface of the spectacle lens is an origin; and a step B of obtaining, by ray tracing, positions where a ray passing through the position of one alignment reference mark and a ray passing through the position of the other alignment reference mark, of rays passing through the positions of the two alignment reference marks, the positions being indicated by the coordinate values calculated in the coordinate system, intersect with the convex surface of the spectacle lens.

3 . The non-transitory computer-readable recording medium storing a program according to claim 2 , wherein
the step A includes a step of taking in the coordinate values indicating the positions of the two alignment reference marks, in a coordinate system different from the coordinate system where the holder mounting center position is the origin, a step of performing coordinate conversion of the different coordinate system into the coordinate system where the holder mounting center position is the origin, and a step of calculating the coordinate values indicating the positions of the two alignment reference marks in the coordinate system after the coordinate conversion.

Assignees

• Hoya Lens Thailand Ltd

Inventors

• Daimaru Takashi
• Nishimura Hidetoshi
• Tanaka Takao

Classifications

• B24B13/005

  Blocking means, chucks or the like; Alignment devices · CPC title

• B24B9/146 Primary

  Accessories, e.g. lens mounting devices · CPC title

• B24B13/00

  Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor (edging optical work, e.g. lenses, prisms B24B9/14) · CPC title