1/23/2011 PHOTONIC SYSTEMS INTEGRATION LABORATORY – UCSD JACOBS SCHOOL OF ENGINEERING UCSD Photonics Telescopic Vision Contact Lens Eric Tremblay * , Ashkan Arianpour, and Joseph Ford University of California San Diego, Jacobs School of Engineering Dirk Beer Pacific Science & Engineering Group * [email protected]UCSD Photonics Systems Integration Lab Presentation at SPIE BIOS Ophthalmic Technologies XXI (7885-35), San Francisco CA, 1/23/2011 9:30 AM
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1/23/2011 PHOTONIC SYSTEMS INTEGRATION LABORATORY – UCSD JACOBS SCHOOL OF ENGINEERING
UCSD Photonics
Telescopic Vision Contact Lens
Eric Tremblay*, Ashkan Arianpour, and Joseph Ford University of California San Diego,
• Tight fabrication and assembly tolerances eliminated by diamond turning as a single element. • Diffraction effects from large obscuration mitigated by increased lens diameter
Single element diamond turned
and coated 8-reflection lens
1/23/2011 PHOTONIC SYSTEMS INTEGRATION LABORATORY – UCSD JACOBS SCHOOL OF ENGINEERING
UCSD Photonics
Input image file: 80˚ field of view Central pupil: 1x mag
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Normal Vision
80° FOV
20° FOV
Annular pupil: 2.8x mag
20° FOV
Telescopic Vision
• Thickness reduced by # of concentric reflections
1/23/2011 PHOTONIC SYSTEMS INTEGRATION LABORATORY – UCSD JACOBS SCHOOL OF ENGINEERING
UCSD Photonics
Zemax model made compatible w/ fabrication constraints:
1:1 Laboratory Eye Model
Optical performance over 9 deg (18deg FOV), 5mm iris
40 μm
Fused Silica Aspheric Optics
Curved Image Surface - Optimized over 30° field - 22 mm radius of curvature
Fovea (±2.5˚)
9° 15°
4.5° 0°
Iris / Aperture stop: Designed at 4-6 mm diameter
Cornea, 12 mm diameter, 1 mm thick IOL, 10 mm diameter, 3.7 mm thick
Immersion fluid: water
Iris Aperture
Fiber Plate
Intraocular Lens
Cornea Lens
Immersion seal (distilled water)
CMOS Sensor
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• Based on the “Eye_Retinal_Image” model by Rod Watkins (available in the Zemax Knowledge base)
• Two fused silica aspheres immersed in distilled water • Edges thickened for handling and mounting • 4 - 6 mm aperture (for design optimization) • 34.5˚ FOV (limited by 10mm fiber faceplate diameter)
Presenter
Presentation Notes
----- Meeting Notes (1/21/11 14:23) ----- add mechanical pictures to this slide, components
1/23/2011 PHOTONIC SYSTEMS INTEGRATION LABORATORY – UCSD JACOBS SCHOOL OF ENGINEERING
UCSD Photonics
Scale Laboratory Eye Model
Sigma 50mm
F/1.4 HSM
Canon 70-200mm F/2.8L
IS Canon 5D Mark II 21 Mpix full frame
SLR
Eye Model
Assembled Eye Model & Relay System
Model Eye & Relay system
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30 cycles/˚ (103 cyc/mm on fiber plate)
Max resolution: 1.06 arc minutes (Group [2,2] w/ 358mm objective)
Measured Spatial Frequency Response (SFR) (slanted edge)
• Assembled with 4mm iris • fiber plate focused using spring-loaded aluminum clamp
1/23/2011 PHOTONIC SYSTEMS INTEGRATION LABORATORY – UCSD JACOBS SCHOOL OF ENGINEERING
UCSD Photonics
Normal Vision (contact center + model eye; 0.5 sec exp)
USAF 1951 Resolution chart imaged through f=36cm F/5 objective (focused at infinite conjugate). Same object distance for both. Lens was designed to work at > 10m conjugates, so with this apparent object distance, both telephoto and normal vision modes are in focus.