Invention Grant
- Patent Title: Lens meter for measuring optical characteristics of a lens
- Patent Title (中): 用于测量透镜的光学特性的透镜计
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Application No.: US11658181Application Date: 2005-08-23
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Publication No.: US07764364B2Publication Date: 2010-07-27
- Inventor: Tadashi Kajino , Yutaka Ohmori
- Applicant: Tadashi Kajino , Yutaka Ohmori
- Applicant Address: JP Gamagori-Shi
- Assignee: Nidek Co., Ltd.
- Current Assignee: Nidek Co., Ltd.
- Current Assignee Address: JP Gamagori-Shi
- Agency: Oliff & Berridge PLC
- Priority: JP2004-242946 20040823
- International Application: PCT/JP2005/015262 WO 20050823
- International Announcement: WO2006/022253 WO 20060302
- Main IPC: G01B9/00
- IPC: G01B9/00

Abstract:
A lens meter having a measurement-optical system including a light source which projects and a light-receiving sensor which receives a light beam having passed through the lens; an arithmetic part which obtains optical characteristics of the lens from results received by the light-receiving sensor; mode selecting device which selects between a single-focal-lens-measurement mode and a progressive-lens-measurement mode; detecting device which detects directions and degrees of displacement of measurement positions from a near-vision portion of a progressive lens based on optical characteristics obtained when the progressive-lens-measurement mode is selected and alignment is made to bring the measurement position into the near-vision portion; a display which displays an alignment screen; and a display-control part which causes the display, based on detection results by the detection device, to display a guide mark indicating a direction and an amount that the lens must be moved to bring the measurement position into the near-vision portion.
Public/Granted literature
- US20080291433A1 Lens Meter Public/Granted day:2008-11-27
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