NIR INTENSITY LENS · Radiant Vision Systems | A Konica Minolta Company Blue Gray Orange 1. Layouts...

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NIR INTENSITY LENS MEASURING NEAR-INFRARED SOURCES QUICKLY & EASILY

2 Radiant Vision Systems | A Konica Minolta Company

© Radiant Vision Systems, LLC

TODAY’S TOPICS

•  Measuring Near-Infrared Sources •  NIR Intensity Lens

•  Instant Measurements •  Fine-Detail Resolution •  Minimal Equipment •  From R&D to Production

•  TT-NIRI Software •  Summary



COMMON APPLICATIONS Non-Visible 3D Sensing Used In…

Automotive LiDAR

Eye Tracking

Gesture Recognition

Facial Recognition



WHY MEASURE INFRARED INTENSITY?

•  Does the device provide enough intensity for sensors to work correctly?

•  Does the device provide too much light for the human eye to receive safely?



TYPES OF LIGHT SOURCES

•  FLOOD •  Light sources used in

Time of Flight (TOF) applications

•  Structured Light •  Laser light diffused

through Diffractive Optical Elements (DOE)

•  Sometimes called a dot pattern

•  LED, Laser, VSCEL



TRADITIONAL MEASUREMENT

•  Goniometer: •  Rotate source in front of a photodetector

or camera to capture intensity data at each angle

•  Limitations: •  Requires thousands of rotations of

source in front of an imager •  Time consuming (1+ hours) •  May leave gaps in measurement; cannot

measure structured light pattern



TRADITIONAL MEASUREMENT

Irradiance on a wall: •  Cast dot pattern on a wall/screen and

measure with imaging system •  Verify dot position against a target

pattern or defined coordinates •  Simple pass/fail on pattern match

•  Limitations: •  Limited angular field of view •  Requires relatively large projection screen •  Resolution potentially reduced due to

diffusive screen material

NIR INTENSITY LENS For Near-Infrared Angular Emission Measurement



NEAR-INFRARED INTENSITY LENS SOLUTION

Fast, accurate, integrated lens solution for radiant intensity measurement of 930–950 nm emitting light sources



NIR Intensity Lens Integrated optical component

ProMetric® Y16 16-megapixel CCD radiometer

SOLUTION COMPONENTS



FOURIER OPTICS



IMAGING LENS VS. CONOSCOPE LENS Image Lens Conoscope Lens

•  Measuring the spatial (position) distribution

•  The lens creates an image that maps a distance on the object to a certain number of pixels on the image

•  The image will closely resemble the object

•  Measuring the angular distribution •  The lens creates an image that maps

incoming angles to positions on the image

•  The image will look like an image taken with a fisheye lens



LENS MECHANICS

All dimensions measured from flange for ease of set up.



3mm

4mm

940 nm, angular emissions to ±70°

116mm



INSTANT MEASUREMENTS

•  Using Fourier optics, lens solutions captures a full cone of data in a single measurement

•  No need to rotate photodetector or source (laser, LED) to capture distribution of angular light



FINE-DETAIL RESOLUTION

•  Simultaneously measure all angles to ±70°

•  Angular resolution to ~0.05° per CCD pixel



MINIMAL EQUIPMENT

•  Traditional measurement set up

•  Now replaced by: •  Single camera/lens solution

•  Compact & turnkey form factor

•  Easily integrated with minimal setup and configuration



FROM R&D TO PRODUCTION

•  Capture & compare measurement data to ensure development accuracy

•  Characterize displays in the lab for engineering and development

•  Use R&D data as benchmark during production for quality control

•  Easily transition data files saved through common software environment



NIR INTENSITY LENS SOLUTION

•  Single camera/lens solution •  Measure lasers or LEDs emitting at 940 nm*

•  Simultaneously measure all angles to ±70° •  Angular resolution to ~0.05° per CCD pixel

•  Working Distance = 3 mm •  For light sources < 4.0 mm in diameter**

* Contact Radiant for applications at other wavelengths

** Contact Radiant for light sources > 4.0 mm in diameter

TrueTest™ TT-NIRI SOFTWARE Test Suite for NIR Intensity Lens System



TT-NIRI SOFTWARE

Pre-defined tests for evaluating near-IR emitters for: •  Angular distribution •  Radiant intensity •  Uniformity, hot spots, fall-off •  Statistics on structured light,

e.g., diffractive optical element (DOE) dot patterns



FULL SUITE OF TESTS INCLUDED IN TT-NIRI



ANGULAR DISTRIBUTION MEASUREMENT

Radar plot in TT-NIRI Software showing radiant intensity (as function of angle) of an infrared LED



FLOOD SOURCE ANALYSIS

•  Analyze distributions: •  Uniformity across angular

emissions (intensity at each degree)

•  Center values •  Angular fall-off •  Hot-spots



DOE DOT SOURCE ANALYSIS

Software automatically defines points of interest

Before analysis After analysis



Points of interest for DOE dot source analysis ensure patterns are projected at correct angle (inclination, azimuth) and intensity (W/sr).



•  Location in pixels (x,y)

•  Location in inclination/ azimuth (degrees)

•  Intensity (W/sr)

•  Peak Average Intensity (mW/sr)

•  Peak Solid Angle (sr)

•  Pixels at Maximum Peak

•  Spot Power Uniformity (%)

•  Maximum Peak Radius (°)

•  Total Flux (mW or W)

•  DOE Flux (mW)

•  Image Export

EXAMPLES OF TT-NIRI DATA OUTPUT



SUMMARY

!  The NIR Intensity Lens instantly captures the angular distribution of a near-infrared emitter up to +/-70 degrees in a single measurement, without moving the camera or device.

!  Radiant’s solutions offers the advantage of speed, size, and software for precise and efficient measurement.

!  NIR measurement with a ProMetric camera/lens solution is faster and more efficient than traditional methods like goniometric solutions, with much higher resolution.


Blue

Gray

STA

ND

ARD

CO

LOR P

ALE

TTE

Orange

1. Layouts should

use our three

standard colors

as the primary

palette in your

presentation.

Use on-screen

Eyedropper to

sample color

from here.

2. Stay within the

interior margin of

the slide layout. 3. Font usage will be Verdana for title/section headline and body text as the PPT standard. Thank you for your cooperation.

RadiantVisionSystems|AKonicaMinoltaCompanyQuestions? Contact [email protected]

THANK YOU!



EXTRA SLIDES



WHY 940 NM?

•  H2O absorption band removes sun radiation at 940 nm, so that interference from sunlight (ambient light) will be reduced

•  Not visible to human eye

NIR INTENSITY LENS · Radiant Vision Systems | A Konica Minolta Company Blue Gray Orange 1. Layouts...

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