Download - Zero delay-focus-with-poLight TLens
© poLight AS | All rights reserved www.polight.com1 | 2016-10-27
Zero delay Focus with poLight TLens®
Grenoble, 26 October 2016
© poLight AS | All rights reserved2 | 2016-10-27 www.polight.com
TLens® Technology – Principle of Operation
Light
Polymer
Glass membrane
Glass support
Piezo-film
From Gel > MEMS Wafer > TLens® > Camera module > Phone OEM
Camera Module Suppliers
PhoneOEM
© poLight AS | All rights reserved3 | 2016-10-27 www.polight.com
TLens versus VCM
VCM
Huge number of elements
Power hungry
Slow
TLens
Simple device
Ultra Low Power
Stable optical axis
Very Fast
No gravity effect
Constant Field of View
TLens
Simple device
Ultra Low Power
Stable optical axis
Very Fast
No gravity effect
Constant Field of View
© poLight AS | All rights reserved4 | 2016-10-27 www.polight.com
Hill Climbing / Contrast AF
• This method is based on scanning the focus range, and for each image measure the contrast, then go back to the maximum contrast: Focused Image: “hill climbing” algorithm
• If we assume the maximum number of image to scan the full range is 10 to 11 images, the full process (worst case) takes about 12 images to get an frames to get the correct focus
• Performances is directly related to frame rate
© poLight AS | All rights reserved5 | 2016-10-27 www.polight.com
AF Performances
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PDAF + Contrast AF
Tlens® VCM
VCM
TLens
Hybrid PDAF
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PDAF + Contrast AF
Tlens® VCM
VCM
TLens
Hybrid PDAFContrast AF
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Hill climbing
TLens® VCM
CurrentVCM TLens
VCM, 3 years ago
16 frames 7 frames
© poLight AS | All rights reserved6 | 2016-10-27 www.polight.com
Zero delay Focus with poLight TLens®
Do NOT search for the best focus, do NOT wait: Just shoot in burst mode
Based on Focus bracketing/StackingComputational photography
Based on Focus bracketing/StackingComputational photography
Only few frames
© poLight AS | All rights reserved7 | 2016-10-27 www.polight.com
Zero delay Focus with poLight TLens®
Based on Focus bracketing/Stacking
Main Advantages versus traditional AF:- Speed
- Post reFocus / All in Focus
- Independent of lighting conditions (issue with PDAF)
TLens key advantages for “Zero Focus delay”- Speed
- No Field of View change
- Optical axis stability
© poLight AS | All rights reserved8 | 2016-10-27 www.polight.com
Q&A and Conclusion
Extremely low power consumption
Touch & re-Focus
Constant field of view
Instant focus
Smart implementation of dual camera
High performance front facing camera
All in focus
TLens®
No magnetic interference High optical
Axis Stability
Low Test & Calibration Cost
poLight® AF actuator unique performance will enhance the mobile camera functionality, enabling a whole new level of picture quality, functionality and user experiences
© poLight AS | All rights reserved www.polight.com9 | 2016-10-27
Thank you