EP0447084A1
Expired / Lapsed
EP
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Ophthalmic lens manufacture
Assignee: NORVILLE OPTICAL Co Ltd
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Filing: 1991-03-04
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Granted: —
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Expires: 2011-03-04
Abstract
Abstract In the manufacture of an ophthalmic lens according to a prescription P, a lens blank is ground to the desired dioptre surface and finished on a lens surfacing machine LSM. The prescription details of the lens are fed into a computer C which is programmed to determine the appropriate speed and time for lens surfacing after grinding, and produce on a printer PR a corresponding document or job sheet JS which combines visual information 1 for an operative as to the lapping die or lap to be selected and a "job" identifier 2 which provides computer identification of the particular job to which the prescription P and document JS relate. The identification of the job by the computer C results in computer control of the lens surfacing machine LSM in respect of lapping speed and time for the lens finishing operation.
Inventors
- 👤 Frank Goodwin Norville
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 16:11
CPC Classifications
B; B24; B24B; B24B13/00; B24B13/06; G; G05; G05B; G05B19/00; G05B19/02; G05B19/418; G05B19/4183; G05B2219/00; G05B2219/30; G05B2219/32; G05B2219/32022; G05B2219/32023; G05B2219/45; G05B2219/45157; Y; Y02; Y02P; Y02P90/00; Y02P90/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
109 words
Manufacture of an ophthalmic lens employing a lens surfacing machine, characterized in that the prescription (P) details of the lens are fed into a computer (C) which is programmed to determine the appropriate speed and time for lens surfacing after grinding, and to produce a corresponding document (JS) which combines visual information for an operative as to the lapping die or lap to be selected and a "job" identifier (2) which provides computer identification of the particular job to which the prescription (P) and document (JS) relate, with identification thereof by computer resulting in computer control of the lens surfacing machine (LSM) in respect of lapping speed and time.
Claim 2
Dependent Claim
36 words
Manufacture of an ophthalmic lens according to claim 1, wherein said "document" is a hard copy document in the form of a job sheet (JS) produced on a printer (PR) controlled by the producing computer (C).
Claim 3
Dependent Claim
43 words
Manufacture of an ophthalmic lens according to claim 1 or claim 2, wherein the job identifier is in the form of a printed bar code (2) which, for job identification, is read by a reading head (RH) connected to the identifying computer (C).
Claim 4
Dependent Claim
44 words
Manufacture of an ophthalmic lens according to any one of the preceding claims, wherein a single computer (C) is employed, both to prepare the job sheet (JS) from the prescription (P) and to control the speed and time of the lens surfacing machine (LSM).
Claim 5
Dependent Claim
44 words
Manufacture of an ophthalmic lens according to any one of claims 1 to 3, wherein two separate computers are employed - one to produce the job sheet (JS) and the other to identify the job therefrom and to control the lens surfacing machine (LSM).
Claim 6
Dependent Claim
36 words
Manufacture of an ophthalmic lens according to claim 5, wherein the job sheet (JS) includes details of the speed and time information for the lens surfacing machine (LSM) adapted to be read by said other computer.
Claim 7
Dependent Claim
35 words
Manufacture of an ophthalmic lens according to claim 3 and claim 6, wherein said speed and time information is included in the form of a second bar code to be read by said other computer.
Claim 8
Dependent Claim
51 words
Manufacture of an ophthalmic lens according to any one of the preceding claims, wherein the computer (C) which identifies the job and determines the speed and time of the lens surfacing machine (LSM) also identifies the appropriate blank for grinding to the desired dioptre surface prior to the computer-controlled surfacing operation.
Claim 9
Dependent Claim
27 words
Manufacture of an ophthalmic lens according to claim 8, wherein the computer (C) which controls the lens surfacing machine (LSM) also controls the lens grinding machine (GM).
Claim 10
Dependent Claim
63 words
Manufacture of an ophthalmic lens according to any one of the preceding claims, wherein the lens surfacing procedure consists of two or more lapping operations, with a coarse pad followed by at least one finer pad, either on the same or on different machines, and the computer (C) is programmed to control all the lapping operations for different speeds and times, as appropriate.
Claim 11
Dependent Claim
48 words
A control system for a lens surfacing machine for use in manufacture according to claim 1, and comprising said computer (C), means (PR) for producing said document (JS), computer associated identifying means (RH) for reading the document (JS), and computer-controlled control means for the lens surfacing machine (LSM).
References Cited (Backward Citations)
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