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Design Description Document Lens Design Optimization/ Estimator Design 01 Description Document UNIVERSITY OF ROCHESTER Design Description Document Estimator/ Lens Design Optimization Joe Centurelli, Natalie Pastuszka Customer: Rick Plympton, Optimax Systems, Inc. Engineers: Joe Centurelli, Natalie Pastuszka, UR Insitute of Optics Advisor committee: Wayne Knox, Dan Brooks, Julie Bentley, UR Institute of Optics Document Number: 01 Date: Revision Level: 5/1/2015 C Authentication Block This is a computer generated document and the electronic master is the official revision. This paper copy is authenticated for the following purpose only: The product vision is a compact, attachable microscope objective for a femtosecond micromachining system. This microscope objective will be part of a larger system that can write a GRIN structure into ophthalmic tissue. Several designs will be drafted to determine the effect of different performance specifications as a function of cost using Optimax Systems Inc.’s Estimator software. 01Rev APage | 1 Lens Design Optimization/ Estimator Design 01 Description Document Contents Product Requirement Document System Block Diagram Optical Design First Order Analysis Estimator Software Manufacturing Plan Test Plan / Validation Risk Assessment Appendix 01Rev APage | 2 Lens Design Optimization/ Estimator Design 01 Description Document Product Requirement Document (See digital document 1) System Block Diagram 1) Microscope objective lens system Optical Design Overview: A microscope objective will be designed for a larger femtosecond micromachining system that uses focused laser pulses to inscribe refractive structures, namely GRIN structures, into ophthalmic tissue. The lens system will be water immersed and will need a working distance greater than 0.5mm before the coverslip that is placed on top of the cornea. The system will be diffraction limited 200-300µm behind the surface of the cornea. Different designs will be drafted for three wavelengths: 400nm, 800nm, 1030nm. The microscope objectives at 400nm and 1030nm will be used with the cornea, while the 800nm will be used with hydrogels. Figure 1. Basic schematic of microscope objective setup. First Order Analysis and evaluation Initial starting design was modeled after a general microscope objective design. The basic parameters were optimized using CODEV1 to yield a design that met the 01Rev APage | 3 Lens Design Optimization/ Estimator Design 01 Description Document required specifications. The designs were then optimized for various performance specifications as a function of cost through an iterative process between the Estimator software and interactive tolerancing in CODE V. In this process, the biggest cost- driving tolerances were determined and loosed accordingly to decrease the total cost of the design while still meeting performance specifications, most importantly an RMS wavefront error less than or equal to 0.05waves. 400NM DESIGN FINAL DESIGN 22:37:40 2.50 MM 400nm Scale: 10.00 26-Apr-15 Figure 2. Design of microscope objective at 400nm. Two aspheric surfaces were used, located on the first and fourth surfaces (first surface of each doublet). 01Rev APage | 4 Lens Design Optimization/ Estimator Design 01 Description Document LENS LISTING OPT 311 Base Parameters RDY THI RMD GLA CCY THC GLC > OBJ: INFINITY INFINITY 100 100 1: 7.68470 2.298588 SIO2_SCHOTT 0 0 ASP: K : 0.282377 KC : 0 CUF: 0.000000 CCF: 100 A :-.757164E-04 B :-.953128E-06 C :0.000000E+00 D :0.000000E+00 AC : 0 BC : 0 CC : 100 DC : 100 2: -12.57829 3.807102 SLAH51_OHARA 0 0 3: 1500.00000 0.200000 0 0 4: 7.68470 2.298588 SIO2_SCHOTT PIK PIK ASP: K : 0.282377 KC : PIK CUF: 0.000000 CCF: 100 A :-.757164E-04 B :-.953128E-06 C :0.000000E+00 D :0.000000E+00 AC : PIK BC : PIK CC : 100 DC : 100 5: -12.57829 3.807102 SLAH51_OHARA PIK PIK 6: 1500.00000 0.200000 PIK 0 STO: INFINITY 0.200000 100 0 8: 4.53441 2.000000 SIO2_SCHOTT 0 0 9: 16.89709 0.200000 0 0 10: 1.74372 1.500000 SIO2_SCHOTT 0 0 11: INFINITY 0.520000 'WATER1' 100 0 12: INFINITY 0.170000 NK5_SCHOTT 100 100 13: INFINITY 0.200000 'Cornea' 100 PIM IMG: INFINITY -0.000333 'Cornea' 100 0 SPECIFICATION DATA NA 0.70000 DIM MM WL 402.50 400.00 397.50 REF 2 WTW 1 10 1 XAN 0.00000 0.00000 0.00000 0.00000 0.00000 YAN 0.00000 0.04000 0.02000 0.07000 0.10000 WTF 1.00000 1.00000 1.00000 25.00000 100.00000 VUY 0.00000 -0.00075 -0.00037 -0.00130 - 0.00186 VLY 0.00000 0.00075 0.00037 0.00131 0.00188 POL N APERTURE DATA/EDGE DEFINITIONS CA CIR S0 10.000000 PRIVATE CATALOG PWL 395.00 400.00 405.00 'WATER1' 1.344000 1.343600 1.343100 01Rev APage | 5 Lens Design Optimization/ Estimator Design 01 Description Document PWL 400.00 395.00 405.00 'Cornea' 1.360000 1.360000 1.360000 REFRACTIVE INDICES GLASS CODE 402.50 400.00 397.50 SIO2_SCHOTT 1.469824 1.470094 1.470370 'WATER1' 1.343365 1.343600 1.343811 NK5_SCHOTT 1.537657 1.538026 1.538403 'Cornea' 1.360000 1.360000 1.360000 SLAH51_OHARA 1.817543 1.818342 1.819159 SOLVES PIM PICKUPS PIK RDY S4 Z1 RDY S1 Z1 PIK RDY S5 Z1 RDY S2 Z1 PIK THI S4 Z1 THI S1 Z1 PIK THI S5 Z1 THI S2 Z1 PIK RDY S6 Z1 RDY S3 Z1 PIK K S4 Z1 K S1 Z1 PIK A S4 Z1 A S1 Z1 PIK B S4 Z1 B S1 Z1 INFINITE CONJUGATES EFL 6.7738 BFL 0.2000 FFL 8.6731 FNO 0.7143 IMG DIS 0.1997 OAL 17.2014 PARAXIAL IMAGE HT 0.0087 ANG 0.1000 ENTRANCE PUPIL DIA 6.9730 THI 13.8399 EXIT PUPIL DIA 6.7218 THI -6.3297 01Rev APage | 6 Lens Design Optimization/ Estimator Design 01 Description Document TANGENTIAL 1.00 RELATIVE SAGITTAL FIELD HEIGHT 0.00025 0.00025 ( .1000 )O -0.00025 -0.00025 0.70 RELATIVE FIELD HEIGHT 0.00025 0.00025 ( .0700 )O -0.00025 -0.00025 0.20 RELATIVE FIELD HEIGHT 0.00025 0.00025 ( .0200 )O -0.00025 -0.00025 0.40 RELATIVE FIELD HEIGHT 0.00025 0.00025 ( .0400 )O -0.00025 -0.00025 0.00 RELATIVE FIELD HEIGHT 0.00025 0.00025 ( 0.000 )O -0.00025 -0.00025 400nm 402.5000 NM 400.0000 NM RAY ABERRATIONS ( MILLIMETERS ) 397.5000 NM 23:46:07 26-Apr-15 Figure 3. Transverse ray plot for the design at 400nm. 01Rev APage | 7 Lens Design Optimization/ Estimator Design 01 Description Document EVALUATION FIRST ORDER THE SYSTEM IT IS DESIRABLE EVALUATION COMMENTS SPECIFICATIONS WILL HAVE THAT (ACTUAL VALUES) APERTURE IMAGE NA= 0.7 IMAGE NA= 1.0 0.7 THE LAST SURFACE WILL BE IMMERSED IN WATER FIELD ± 0.1 DEGREES ± 0.1 DEGREES WAVELENGTHS 400 ± 3 NM 400 ± 3 NM 0.5 W TI:SAPPHIRE LASER SOURCE PACKAGING/MANUFACTURING THE IT IS EVALUATION COMMENTS SYSTEM DESIRABLE SPECIFICATIONS (ACTUAL WILL HAVE THAT VALUES) WORKING DISTANCE >0.5 MM 0.887 MM TO PREVENT CONTACT WITH CORNEAL TISSUE FULL APERTURE >5MM, <12MM 6.78 MM CLEAR APERTURE OF FIRST >10MM 6.1MM TO ACCOMMODATE BEAM WIDTH SURFACE OVERALL LENGTH >5MM, <35MM 16.511MM LENGTH OF THE LENS ASSEMBLY FROM FIRST LENS SURFACE TO LAST LENS SURFACE OBJECT COLLIMATED 0.5 W PULSED N/A FEMTOSECOND TI:SAPPHIRE LASER WITH APPROX. 10MM BEAM WIDTH 01Rev APage | 8 Lens Design Optimization/ Estimator Design 01 Description Document FINAL SURFACE PLANO OR CONVEX PLANO FOR THE PREVENTION OF BUBBLES WHEN IMMERSED IN WATER CEMENTED DOUBLETS NONE TWO FOR EASE OF MANUFACTURING HEMISPHERICAL LENS SURFACES NONE ONE FOR EASE OF MANUFACTURING MATERIAL THE SYSTEM IT IS DESIRABLE EVALUATION COMMENTS SPECIFICATIONS WILL HAVE THAT (ACTUAL VALUES) GLASS TYPES USE OPTIMAX PREFERRED GLASSES SIO2 AND SLAH51 OPTIMAX SYSTEMS INC. PREFERRED GLASSES COLUMN (HTTP://WWW.OPTIMAXSI.COM/PREFERRED- GLASS/) *ANOTHER GLASS TYPE MAY BE NEEDED TO CORRECT FOR CHROMATIC ABERRATIONS SURFACE TYPES SPHERICAL ONLY 4 SPHERICAL, NO ASPHERES, GRINS, OR DOES DUE TO LIMITS OF OPTIMAX ESTIMATOR SOFTWARE 2 ASPHERES MAXIMUM NUMBER <4 6 OF ELEMENTS ANTI-REFLECTION V-COAT CENTERED AT 400NM N/A STANDARD OPTIMAX SYSTEMS INC. ANTI- COATING REFLECTION V- COAT 01Rev APage | 9 Lens Design Optimization/ Estimator Design 01 Description Document PERFORMANCE THE SYSTEM IT IS DESIRABLE THAT EVALUATION COMMENTS SPECIFICATIONS WILL HAVE (ACTUAL VALUES) TRANSMISSION 90% >90% 88.81% RAY ANGLES OF <50 DEGREES <40 DEGREES MAX AOI: 31.679 NEEDED TO SIMPLIFY THE COATING INCIDENCE AND DESIGN REFRACTION ON ALL MAX AOR: 31.679 COATED SURFACES WAVE FRONT ERROR LESS THAN 0.05 WAVES 0.02188 DIFFRACTION LIMITED 200µM BEHIND THE SURFACE OF THE N/A CORNEA TO 300µM BEHIND THE SURFACE OF THE CORNEA VIGNETTING NONE NONE TO INCREASE TRANSMISSION 01Rev APage | 10 Lens Design Optimization/ Estimator Design 01 Description Document 800NM DESIGN FINAL DESIGN 23:08:06 2.27 MM 800nm Scale: 11.00 26-Apr-15 Figure 4. Design of microscope objective at 800nm. All elements are spherical. LENS LISTING 800nm RDY THI RMD GLA CCY THC GLC > OBJ: INFINITY INFINITY 100 100 1: 10.81065 2.250000 SIO2_SCHOTT PIK PIK CEM: CIN: CTH: 0.0000 2: -18.64693 2.250000 STIH53_OHARA PIK PIK 3: 1500.00000 0.200000 PIK 0 4: 10.81065 2.250000 SIO2_SCHOTT 0 0 CEM: CIN: CTH: 0.0000 01Rev APage | 11 Lens Design Optimization/ Estimator Design 01 Description Document 5: -18.64693 2.250000 STIH53_OHARA 0 0 6: 1500.00000 0.200000 0 0 STO: INFINITY 0.200000 100 0 8: 5.48264 2.250000 SIO2_SCHOTT 0 0 CEM: CIN: CTH: 0.0000 9: 19.33180 0.200000 0 0 10: 3.00000 3.629633 SIO2_SCHOTT 0 0 CEM: CIN: CTH: 0.0000 11: INFINITY 0.550000 'water8' 100 0 12: INFINITY 0.170000 NK5_SCHOTT 100 100 13: INFINITY 0.200000 'Hydrogel' 100 PIM IMG: INFINITY -0.000709 'Hydrogel' 100 0 SPECIFICATION DATA NA 0.70000 DIM MM WL 804.00 802.00 800.00 798.00 796.00 REF 3 WTW 1 2 4 2 1 XAN 0.00000 0.00000 0.00000 YAN 0.00000 0.07000 0.10000 WTF 1.00000 1.00000 1.00000 VUY 0.00000 -0.00033 -0.00048 VLY 0.00000 0.00033 0.00048 POL N APERTURE DATA/EDGE DEFINITIONS CA CIR S0 10.000000 CIR S1 EDG 5.000000 CIR S2 EDG
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