Method of making high precision optics having a wavefront profile
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G02C-007/02
G02C-007/16
G02B-003/00
출원번호
US-0118576
(2011-05-31)
등록번호
US-8262220
(2012-09-11)
발명자
/ 주소
Lai, Shui T.
출원인 / 주소
Lai, Shui T.
대리인 / 주소
SF Bay Area Patents, LLC
인용정보
피인용 횟수 :
0인용 특허 :
8
초록▼
A method of generating a high precision optical surface profile includes obtaining a high precision optical surface profile which contains information of the optical path difference map of the profile. A substrate material has a known index of refraction, Ns, while a cover material has an index Nc t
A method of generating a high precision optical surface profile includes obtaining a high precision optical surface profile which contains information of the optical path difference map of the profile. A substrate material has a known index of refraction, Ns, while a cover material has an index Nc that is more closely matched to the index Ns of the substrate material than the index of air Nair to Ns. An exaggerated surface profile is cut that is proportionally expanded from the high precision profile by a factor: (Ns−Nair) divided by (Ns−Nc). The cut surface profile is covered with the cover material.
대표청구항▼
1. An optical element having a wavefront profile for correcting wavefront aberrations, comprising: (a) a substrate comprising a material having an index of refraction Ns;(b) a cut surface of the substrate cut to a profile that mimics the wavefront profile wherein said surface cut to said profile is
1. An optical element having a wavefront profile for correcting wavefront aberrations, comprising: (a) a substrate comprising a material having an index of refraction Ns;(b) a cut surface of the substrate cut to a profile that mimics the wavefront profile wherein said surface cut to said profile is expanded from the wavefront profile by a factor of (Ns−Nair) divided by the absolute value of (Ns−Nc), where Nair is the index of refraction of air; and(c) a cover comprising a material having an index of refraction Nc covering the cut surface of the substrate. 2. The optical element of claim 1, wherein Ns is greater in value than Nc, and the profile of the cut surface is expanded directly proportionally to the wavefront profile, and wherein a shape of a peak in the wavefront profile corresponds to a peak in the profile of the cut surface profile exaggerated by the expansion factor. 3. The optical element of claim 1, wherein Ns is smaller in value than Nc, and the profile of the cut surface is expanded inversely proportionally to the wavefront profile, and wherein a shape of a peak in the wavefront profile corresponds to a shape of a valley in the profile of the cut surface exaggerated by the expansion factor. 4. The optical element of claim 1, further comprising a window covering the material of the cover. 5. The optical element of claim 1, further comprising a window formed by the material of the cover. 6. The optical element of claim 1, further comprising a window that has a surface including a flat, or concave, or convex, or aspheric contour, or an astigmatic curvature, or combinations thereof. 7. The optical element of claim 1, wherein the cover material comprises a material derived from a chemically altered structure of the material of the substrate. 8. The optical element of claim 7, wherein the chemically altered structure is provided by modifying one or more of the bonds, including shortening a bond. 9. An optical element having a wavefront profile, configured to form an ophthalmic lens for correcting refractive errors of the eye, comprising: (a) a substrate comprising a material having an refractive index Ns, and having a front and a back surface;(b) a cover comprising cover material having a refractive index Nc(c) a cut profile on the front surface of the substrate material, wherein the cut profile corresponds to the wavefront profile expanded by a factor of (Ns−1) divided by the absolute value of (Ns−Nc); and(d) a window covering the cover material; and(e) wherein refractive power of the ophthalmic lens is provided by a shape profile at a surface of the window or by a shape profile at the back surface of the substrate, or both. 10. The optical element of claim 9, wherein the window comprises cover material. 11. The optical element of claim 9, wherein a surface of the window has a flat, or concave, or convex, or aspheric curvature, or an astigmatic curvature, or combinations thereof. 12. The optical element of claim 11, wherein the surface of the window has been generated by cutting. 13. The optical element of claim 12, wherein the cutting has been generated by a raster of point locations, each point location containing an axial location for a cutter tip. 14. The optical element of claim 12, wherein the cutting has been generated using derivative values of a cutting curve. 15. The optical element of claim 9, wherein the back surface of the substrate has a concave curvature. 16. The optical element of claim 15, wherein the back surface of the substrate has been generated by cutting. 17. The optical element of claim 16, wherein the cutting has been generated by a raster of point location, each point location contains the axial location of the cutter tip. 18. The optical element of claim 16, wherein the cutting has been generated using derivative values of the cutting curve. 19. The optical element of claim 9, wherein the cover comprises liquid. 20. The optical element of claim 19, wherein the liquid comprises a material that is hardened by a process including thermal curing, or photo-polymerization, or a combination thereof. 21. The optical element of claim 20, wherein the process further includes contacting a mold with the window or the cover, and applying a material hardening process to fix the shape of the window or the cover. 22. The optical element of claim 7, wherein the chemically altered structure is provided by modifying one or more of the bonds, including lengthening a bond. 23. The optical element of claim 7, wherein the chemically altered structure is provided by modifying one or more of the bonds, including changing an angle of a bond. 24. The optical element of claim 7, wherein the chemically altered structure is provided by adding or subtracting one or more molecules. 25. The optical element of claim 7, wherein the chemically altered structure is provided by adding or subtracting one or more ions or atoms. 26. The optical element of claim 7, wherein the chemically altered structure is provided by adding or subtracting one or more polymer units. 27. The optical element of claim 12, wherein the cutting has been generated by a raster of point locations, each point location containing an axial location for a cutter height. 28. The optical element of claim 16, wherein the cutting has been generated by a raster of point location, each point location contains the axial location of a cutter height. 29. The optical element of claim 9, wherein the back surface of the substrate has a convex curvature. 30. The optical element of claim 9, wherein the back surface of the substrate has a progressive addition lens profile curvature. 31. The optical element of claim 9, wherein both the cover and the window comprise liquid.
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