Patent SG-11201903172T-A (SG)
Title: Lens examination equipment and method
Inventor: DREW THOMAS
IPC: G01M11/02
Filed: 2017-10-17
Abstract: INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property 111111101111 0111010101111101111101 0 011111111111111111111111111111111111111111111 Organization International Bureau (10) International Publication Number (43) International Publication Date ......0\"\" WO 2018/073577 A2 26 April 2018 (26.04.2018) WIP0 I PCT (51) International Patent Classification: West Midlands B7 4BB (GB). DEAN, Jonathan; c/o Aston G01M 11/02 (2006.01) Eyetech Limited, Faraday Wharf, Holt Street, Birmingham (21) International Application Number: West Midlands B7 4BB (GB). PCT/GB2017/053136 (74) Agent: WILSON GUNN (BIRMINGHAM); Charles (22) International Filing Date: House, 148/9 Great Charles Street, Birmingham West Mid- lands B3 3HT (GB). 17 October 2017 (17.10.2017) (25) Filing Language: English (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, (26) Publication Language: English AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, (30) Priority Data: CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FL GB, GD, GE, GH, GM, GT, HN, 1617652.1 18 October 2016 (18.10.2016) GB HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, 1619772.5 23 November 2016 (23.11.2016) GB KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, (71) Applicant: ASTON EYETECH LIMITED [GB/GB]; MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, Faraday Wharf, Holt Street, Birmingham West Midlands B7 OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, 4BB (GB). SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (72) Inventors: DREW, Thomas; c/o Aston Eyetech Limit- ed, Faraday Wharf Holt Street, Birmingham West Mid- (84) Designated States (unless otherwise indicated, for every _ lands B7 4BB (GB). KRAWCZYNSKI, Michal; c/o Aston kind of regional protection available): ARIPO (BW, GH, Eyetech Limited, Faraday Wharf, Holt Street, Birmingham GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, Aston UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, West Midlands B7 4BB (GB). JOSHI, Omkar; = c/o Eyetech Limited, Faraday Wharf, Holt Street, Birmingham TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, = Aston EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, West Midlands B7 4BB (GB). DAVIES, Joseph; c/o _ Eyetech Limited, Faraday Wharf, Holt Street, Birmingham MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, Aston West Midlands B7 4BB (GB). SUDERA, Suraj; c/o = Eyetech Limited, Faraday Wharf, Holt Street, Birmingham = = METHOD (54) Title: LENS EXAMINATION EQUIPMENT AND = 374 = i . .. = _ ...... AI _ — \ = — / / 174a \ R; 4_______----370 = = 41, i' = 372- ---- \"` i Ri / / = — = _ _ ...--,,,,,,_ 374 76 8 ei Figure IN (57) : A test pattern (170) comprising a set of dots (174) which define a first ellipse (176) of best fit in which the major and IN in minor axes R1, R2 are equal (i.e. a circle) is displayed on a plane surface and a digital image of the (usually distorted) test pattern seen M through a lens is captured. A second ellipse of best fit joining the dots in the set is derived from the distorted test pattern in the image. C Characteristics of the first and second ellipses are compared to determine the degree and nature of distortion to the test pattern, from ---, which the power of the lens is calculated. The major and minor axes of the first and second ellipses may be compared. The test pattern c)1: 1-1 can include a number of said sets of dots distributed over an area of the surface with each set being analysed to determine the optical cz parameters of the lens at multiple locations. ei C [Continued on next page] WO 2018/073577 A2 MIMMIMOHNIIMEIDINIFIMOMINEHEHOIMIE TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Published: — without international search report and to upon receipt of that report (Rule 48.2(g)) be republished