Objective
About 45% of all ophthalmic lenses are made from plastic materials (CR39 or polycarbonate) and this percentage is growing all over the world. The reason for this is the convenient combination of properties such as optical homogeneity, low mass, low fragility, etc. The optical quality of plastic lenses is comparable with that of glass lenses, however the low abrasion resistance of their surface is a disturbing factor, and great efforts are being made to harden the surfaces by appropriate coatings. The abrasion process is very complex and difficult to be reproduced by a simple procedure: before this project no test method existed suitable to the needs of the developing engineer. Europe is a producer of high quality lenses, the Far East fabricating lower quality but cheaper products. The European industry through its professional organization (EUROM) agreed to support financially the development of a test method to consistently measure and characterize this commercially very important quality factor.
RESULTS
A test method has been developed that matches the complex abrasive effects induced by actual everyday use.
The work carried out included
- the development of a special cleaning system, of an optical system for the measurement of scattered light and of a suitable abrasive mixture easy to be standardized;
- a field test;
- the controlled abrasion and inspection of a great number of different lenses by different manufacturers.
A draft of a standard based on the results of the work has been proposed to CEN/TC/170/WG 2.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- engineering and technology materials engineering coating and films
- engineering and technology materials engineering amorphous solids
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Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
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Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
Aalen
Germany
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.