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US 2011/0216327 A1Published application
Lens shape measurement device
AssigneesTopcon Corporation, Hoya Corporation
InventorsTakahiro Watanabe, Kenichi Watanabe, Kenji Miyashita, Masahiro Jinbo
Life of this patent
Estimating the term…
Abstract
A relationship between a rim shape and a position of a mounting hole is obtained based on a detection signal from the second position detector (40) by controlling a measuring element shifter (6) to move the leading end of a measuring element for a lens (36) to have contact with an refracting face of the lens (Lm) held in the lens holder.
Claims10
A lens shape measurement device, comprising:
- a lens holder set in a measuring element main body;
- a measuring element for a lens configured to measure a rim shape of a lens, the measuring element for a lens including a leading end portion engageable with a mounting hole of the lens for an attachment, which is held in the lens holder, and a side face which has contact with a circumferential face of the lens to be moved therealong;
- a measurement element shifter configured to displace the measuring element for a lens along an outer circumferential face of the lens;
- a first position detector configured to detect a position of the measuring element for a lens along the outer circumferential face;
- a second position detector configured to detect a position in the direction orthogonal to the first position detector;
- and
- an arithmetic control circuit configured to obtain a relationship between the rim shape and a position of the mounting hole based on a detection signal from the second position detector by controlling the measuring element shifter to move the leading end of the measuring element for a lens to have contact with an refracting face of the lens held in the lens holder.
4 more elements
Dependencies are inferred from the claim text.