Optics: measuring and testing – Lens or reflective image former testing
Reexamination Certificate
2006-03-23
2008-11-25
Chowdhury, Tarifur R. (Department: 2886)
Optics: measuring and testing
Lens or reflective image former testing
Reexamination Certificate
active
07456941
ABSTRACT:
The invention relates to a measuring device (01) for measuring the refraction properties of optical lenses (07), especially spectacle glasses, comprising a measuring light grid (20) for producing a plurality of light beams (16) which are deflected by the lens (07) as a result of refraction of light, and comprising a measuring light detector (12) on which the deflected light beams are projected and are there recorded electronically, and comprising an evaluation device in which the refraction properties of the lens (07) are determined from the measurement signals of the measuring light detector (12), wherein a screen (10) comprising a plurality of light passage openings (23, 24) is arranged between the lens (07) to be studied and the measuring light detector (12), wherein the light beam (16) produced by the measuring light grid (20) and deflected at the lens (07) by refection of light is projected through the various light passage openings (23, 24) of the screen (10) along separate ray paths onto the measuring light detector (12).
REFERENCES:
patent: 5307141 (1994-04-01), Fujieda
patent: 5523836 (1996-06-01), Minix
patent: 6195164 (2001-02-01), Thompson et al.
patent: 1 136 806 (2001-09-01), None
patent: 1 248 093 (2002-10-01), None
European Search Report for EP Counterpart Application No. EP 06000542.8-1236, 7 pgs. (Oct. 23, 2007).
Akanbi Isiaka O
Blakely , Sokoloff, Taylor & Zafman LLP
Chowdhury Tarifur R.
Oculus Optikgeraete GmbH
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