Claims
- 1. A method for contouring the surface of an optical lens, said method comprising the steps of:
(a) measuring the refractive error of a patient in need of a refractive correction; (b) generating, using a computer, an electronic correction contour from said refractive error; (c) transferring said electronic correction contour onto the surface of said lens by ablation etching with one or more laser pulses; (d) electronically measuring the refractive properties of said lens after each of said laser pulses; (e) comparing, by means of said computer, said refractive properties of said lens with said electronic correction contour; (f) terminating said ablation etching in localized areas wherein said refractive properties of said lens match said electronic correction contour.
- 2. The method of claim 1 wherein said ablation etching comprises the steps of:
(h) generating a series of complex laser patterns by means of a micromirror array comprising a series of individually controllable micromirrors; and. (i) projecting said series of complex laser patterns onto the surface of said lens for the purpose of contouring said lens by successive ablation etchings.
- 3. The method of claim 2 wherein said micromirror array is a Thin-film Micromirror Array manufactured by Daewoo Electronics Co. Ltd. of Korea.
- 4. The method of claim 1 wherein said ablation etching comprises the steps of:
(j) generating a series of complex laser patterns by means of masks; and, (k) projecting said series of complex laser patterns onto the surface of said lens for the purpose of contouring said lens by successive ablation etchings.
- 5. The method of claim 3 wherein said masks are transmissive masks.
- 6. The method of claim 3 wherein said masks are printed reflective masks.
- 7. The method of claim 1 wherein said ablation etching comprises the steps of:
(l) mounting said lens on a movable positioning table; (m) moving said positioning table to change the position of said lens relative to an incident spot laser beam for the purpose of contouring said lens by successive ablation etchings.
- 8. The method of claim 1 wherein said optical lens is an eyeglass lens.
- 9. The method of claim 1 wherein said optical lens is a contact lens.
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application claims the priority of U.S. Provisional Application Ser. No. 60/224,647 entitled “A Laser Beam Patterning Device and Apparatus for Reshaping of Eyeglass Lenses by Ablation and Continuous Process Monitoring” filed on Aug. 8, 2000 the entire contents and substance of which are hereby incorporated in total by reference.
Provisional Applications (1)
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Number |
Date |
Country |
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60224647 |
Aug 2000 |
US |