GOING POLARIZED: ADDING A NEW PERSPECTIVE TO INDUSTRIAL IMAGING - - PowerPoint PPT Presentation

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GOING POLARIZED: ADDING A NEW PERSPECTIVE TO INDUSTRIAL IMAGING - - PowerPoint PPT Presentation

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GOING POLARIZED: ADDING A NEW PERSPECTIVE TO INDUSTRIAL IMAGING Nina Chen Product Manager LUCID Vision Labs November 8 t h , 2018 1 INSPECTION WITH POLARIZATION IMAGING Inspection tasks which require measuring fine mechanical detail can be

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Nina Chen Product Manager LUCID Vision Labs November 8t h, 2018

GOING POLARIZED: ADDING A NEW PERSPECTIVE TO INDUSTRIAL IMAGING

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LUCID VIS ION LABS , INC.

INSPECTION WITH POLARIZATION IMAGING

Inspection tasks which require measuring fine mechanical detail can be challenging with traditional cameras – such as this intricate gear used in automotive or aerospace applications. In this case, the accuracy of the measurement is required to be within a few um. Metallic parts also suffer from specular reflection which may further complicate inspection and measurement. S cratch mark on gear in Degree of Linear Polarization & Angle of Linear Polarization images

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LUCID VIS ION LABS , INC.

POLARIZED LIGHT, WHAT’S THAT?

Light oscillating at

  • nly one angle is

linearly polarized

Light oscillates at angles perpendicular to the direction of propagation

Angle of linear polarization –Angle of the polarized light Intensity of linear polarization – S trength of the light signal Degree of linear polarization – How well the light is polarized When light oscillation is omnidirectional –

not polarized

There properties can be captured by Stokes’ Parameters

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LUCID VIS ION LABS , INC.

HOW LIGHT BECOMES POLARIZED

Color = Wavelength Brightness = Intensity

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LUCID VIS ION LABS , INC.

HOW LIGHT BECOMES POLARIZED

Light can also be polarized through reflection or refraction

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LUCID VIS ION LABS , INC.

DETECTION OF POLARIZED LIGHT

Traditional polarization imaging require placement of a polarizing filter in front of the camera to capture light in the angle of polarization consistent with the filter. Regular Camera Polarization Filter Polarized Light Polarized Light S

  • urce

S pecimen

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LUCID VIS ION LABS , INC.

SONY POLARIZATION TECHNOLOGY

On the color polarization sensor, there is an additional RGB Bayer filter

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LUCID VIS ION LABS , INC.

This design reduces pixel cross-talk compared to other polarization sensors that places the wire-grids above the micro lens array

SONY IMX250MZR POLARIZATION TECHNOLOGY

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LUCID VIS ION LABS , INC.

S ensor Name IMX250MZR/ IMX250MYR Resolution 5MP , 2448 x 2048 Pixel size 3.45μm S ensor format 2/ 3” S ensor framerate 163.4fps (8bit) Extinction ratio Greater than 300:1 (500nm)

SONY POLARIZATION SENSORS

S ensor Name IMX253MZR/ IMX253MYR Resolution 12.3MP , 4096 x 3000 Pixel size 3.45μm S ensor format 1.1” S ensor framerate 68.3fps (8bit) Extinction ratio TBD

When integrated into LUCID’s cameras, the polarization camera can achieve up to 5MP at 120 fps or 12MP at 50fps.

Current available models:

  • PHX050S
  • P/ Q (5MP

, 24fps)

  • TRI050S-P/ Q (5MP

, 24fps)

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LUCID VIS ION LABS , INC. CONFIDENTIAL

SENSOR PERFORMANCE – QUANTUM EFFICIENCY

LUCID measures sensor performance in adherence to the EMVA 1288 standard. Quantum efficiency per polarization channel as well as key sensor performance metric such as dynamic range are published on thinklucid.com.

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LUCID VIS ION LABS , INC. CONFIDENTIAL

SENSOR PERFORMANCE – EXTINCTION RATIO

Extinction Ratio (ER) is the ratio between the maximum and minimum signal detected by a particular polarization pixel channel for a linearly polarized input. The quality of ER affects many applications and is a key parameter

  • ptical engineers care about –

ER affects how well the degree of polarization can be measured.

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LUCID VIS ION LABS , INC.

POLARIZATION IMAGING WITH LUCID’S CAMERA

All images are taken with PHX Polarization camera and processed using a color wheel to represent polarization information

90 ° 0° 180 ° 45 ° 135° 15° 30° 60° 75° 105° 120° 150° 165° 1 Angle of Polarization Degree of Polarization

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LUCID VIS ION LABS , INC.

POLARIZATION IMAGING WITH LUCID’S CAMERA

S urface scratch Internal stress Monochrome image Polarized image

Plastic Inspection – Clear Cellphone Case

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LUCID VIS ION LABS , INC.

CHALLENGES IN INSPECTION TASKS

Hidden stress in materials

https:/ / www.yourmechanic.com/ article/ symptoms-of-a-bad-or-failing-door-mirror https:/ / www.edmundoptics.com/ resources/ application-notes/ optics/ introduction-to-polarization/ https:/ / images-na.ssl-images-amazon.com/ images/ I/ 61zmqV9CpgL._S L1170_.j pg

S trong reflective surfaces Low contrast obj ects/ surfaces

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LUCID VIS ION LABS , INC. CONFIDENTIAL

INSPECTING USING REFLECTION TECHNIQUE

Effective in detecting:

  • Surface damage
  • Surface flatness
  • Scratches

Polarization camera Polarized light S pecimen Refected Polarized light

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LUCID VIS ION LABS , INC. CONFIDENTIAL

INSPECTING PLASTIC SHRINK WRAP

DAMAGE – STICKER - DAMAGE

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LUCID VIS ION LABS , INC. CONFIDENTIAL

INSPECTING PLASTIC SHRINK WRAP

Each quadrant represents a polarization channel from the Polarsens 4 pixel calculation unit. Reflection can be removed as one polarization channel can minimize the polarized reflected light.

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LUCID VIS ION LABS , INC. CONFIDENTIAL

INSPECTING PLASTIC SHRINK WRAP

Here is another example of images visualized in the 2x2

  • grid. One polarization channel catches the most amount
  • f polarized reflected light off of the plastic wrap. Any

de-polarization by the sticker or a rip in the package can be easily identified.

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LUCID VIS ION LABS , INC.

INSPECTION OF WELDING SPOT

  • welding proj ect which is difficult to

detect the target with mono camera

  • Measure of welding consistency, spot

location, size and quality.

DOLP image of welding spots

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LUCID VIS ION LABS , INC. CONFIDENTIAL

INSPECTING SEMICONDUCTOR WAFER

DOLP image of semiconductor wafer AOLP image of semiconductor wafer

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LUCID VIS ION LABS , INC. CONFIDENTIAL

INSPECTING USING REFLECTION TECHNIQUE

WITH UNPOLARIZED LIGHT

Effective in dedecting:

  • Surface damage
  • Surface flatness
  • Scratches

Polarization camera Unpolarized light S pecimen Refected Polarized light

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LUCID VIS ION LABS , INC. CONFIDENTIAL

CARBON FIBER INSPECTION

https:/ / www.iis.fraunhofer.de/ en/ ff/ sse/ ims/ tech/ polarizationimaging.html

Intensity image of a region of a finished part. Not much of the fibers can be seen - the fiber

  • rientation is not discernible in

the intensity image. False color image to represent fiber orientation. S

  • me areas can

easily be identified in which the fibers are not perfectly straight.

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LUCID VIS ION LABS , INC.

IMAGING USING TRANSMISSION TECHNIQUE

Polarization camera Polarized light S pecimen Effective in detecting: Transmitted polarized light

  • Internal stress
  • Transparent debris
  • Scratches
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LUCID VIS ION LABS , INC.

MEASURING STRESS

images courtesy of ilis (https:/ / www.ilis.de/ ) with PHX050S

  • P camera
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LUCID VIS ION LABS , INC. CONFIDENTIAL

INSPECTING CONTACT LENS

Detecting the edge of contact lens for non-uniformity Inspection of contact lens for defects and abnormalities

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LUCID VIS ION LABS , INC.

EXISTING POLARIZATION SOLUTIONS

  • No moving part, simple setup
  • Complete linear polarization data

with one camera

  • Overall system cost-saving
  • Low effort for development
  • More variables
  • Perspective distortion
  • $$$$$$
  • Greater setup and

development effort

  • Flip between filters very fast
  • Time delay in filter rotation
  • Moving mechanical parts
  • $$$

System 3

3 Polarizers 3 Cameras S witch Trigger S

  • urce

Host PC

System 1 System 2

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LUCID VIS ION LABS , INC.

PHOENIX: INDUSTRY’S SMALLEST GIGE POE CAMERA

TRANSFORMABLE

The camera can be mounted in various configurations such as flat

  • r right angle.

IX CONNECTOR

70% less space than RJ45 sockets. High EMC immunity and snap-in locking

NF MOUNT

NF mounting and lens options provide even smaller footprint, up to 40% less space compared t o c-mount. S upports up to 2/ 3” sensor sizes.

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LUCID VIS ION LABS , INC. CONFIDENTIAL

IP67 OPTION

LUCID’s sealed lens t ube and attachment ring makes the camera dustproof and water resistant for harsh working environments.

ACTIVE SENSOR ALIGNMENT

All cameras are actively aligned t o minimize image sensor tilt, rot ation, and t o place the center of the image sensor at the lens optical axis.

M12/M8 CONNECTORS

The M12 Ethernet and M8 GPIO connectors provide robust and secure cable connection with ingress protection against dirt, dust, and water.

TRITON: NEW PERFORMANCE STANDARD

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LUCID VIS ION LABS , INC. CONFIDENTIAL

POLARIZATION PROCESSING IN ARENAVIEW

Monochrome HS V Overlay Degree of Linear Polarization

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LUCID VIS ION LABS , INC. CONFIDENTIAL

WHO IS LUCID

  • LUCID Vision Labs is a new company that designs and

manufactures innovative machine vision products that creatively leverage new technology to deliver exceptional value to our customers.

  • Founded

in January 2017 in Canada, first product shipped in March 2018

  • Headquartered in Canada, with regional sales and

support offices in Germany, Japan and China

Headquarter in Richmond, BC, Canada Engineering, sales, support , and manufact uring European office in Ilsfeld, Germany S ales and support

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LUCID VIS ION LABS , INC.

CONTACT

http:/ / www.linkedin.com/ company/ lucid-vision-labs/ http:/ / www.thinklucid.com

Visit us at Booth 1C62