StingRay The Smartest Laser in Vision - VDMAibv.vdma.org/documents/256550/1221336/THU_1230_Coherent_Stin… · StingRay Advantage – The Customer • The features and performance

CONFIDENTIAL

StingRay

The Smartest Laser in Vision

15 October 2012Wallace LatimerPLM – Machine Vision

Superior Reliability & Performance COMPANY CONFIDENTIAL P. 2

Presentation Agenda

• 3D Triangulation Overview

• Applications

• Stingray Benefits

• Key Parameter Definitions


3D TRIANGULATION OVERVIEW


3D Triangulation Theory

• Projecting a narrow band of light onto a three-dimensionally shaped surface produces a line of illumination that appears distorted from other perspectives than that of the projector, and can be used for an exact geometric reconstruction of the surface shape.


Advantages of Laser Line Triangulation

• 3D information• X and Y axis by the laser line• Z axis by moving the object

• Thin lines for precise measurements

• Extremely high optical power density

• Less image data to compute (faster)

• Easy to filter


APPLICATIONS


Structured Light Applications

• Weld Seam• Glue Bead• Gasket seals• Soldier Paste• BGA• Wood Primary and

Secondary processing• Food portioning/sorting• Packaging• Tire – Wall and Tread• Wheel alignment• Alignment guidance• Bottle

• PCBA post assembly• Rail car• Rail track• Road / Tunnel• Rail Brakes• Contour measurement• Steel / Extrusion• 3D Reconstruction• Bin Picking• Non Contact Surface Profile


STINGRAY BENEFITS


Laser’s in Vision

• In today’s world of expanding 3D vision systems, the camera and laser are equal partners in the accuracy, stability and repeatability of the measurements made and used by the applications.

• The requirements on the laser for power, pointing and electrical stability are far above a typical illumination system requirements. Having a source which produces very high power density, very thin measurement cross sections with a uniform return that does not mask the profile of the object is critical to maximizing the advantage of this approach to non contact measurement

• The availability of lasers that generate structured lines is as broad as it has ever been. The technology and advancement of these lasers has stayed the same for many years now, not giving the user the ability to leverage this portion of the system beyond its current technology.


StingRay


StingRay Advantage

• The StingRay utilizes digital microprocessor via embed firmware management to control the laser like no other product on the market.

• Features such as:• Highly stable external translation focus• Best in class pointing accuracy• Highly repeatable and extremely uniform laser lines • Lasing hours counters, • Health monitors• Communication protocols• On board calibration features• Optimized thermal management

• These push the StingRay product ahead of the current industry offerings and create a whole new class of Vision laser sources.

• Creating laser sources that can truly enable applications; create a better and easier user experience and enable advanced features for smarter and more accurate measurement systems.


StingRay Advantage - Electronics

• The StingRay laser system is endowed with advanced and highly stable electronics. These electronics create an electrical working environment that is extremely accurate, stable and contributing very little noise to the system.

• Focus Areas:• Input Voltage flexibility• Low electrical noise• Calibrated external photo feedback for CP• Modulation• Communications• End of Life indication

• Our electronics provide industry leading performance for constant power modulation at >500 kHz with high linearity, fast response times and fully reproduced waveforms for maximum flexibility to dynamically control the laser source in any given application.

• A unique feature in the Analog Modulation is the ability to manage a PWM style feedback as well as mixed mode modulation/power scaling


StingRay Advantage - Communications

• The StingRay product has embedded RS232 communications with persistent memory, creating a interactive and intelligent

• Features:• Query and Set Laser Power• Query and Set Modulation polarity• Query Laser Configuration Parameters• Query diode current• Query diode/electroncis temperature• Query and Set Operation temperature protections• Lasing hours• Laser Status

• In addition to the above, the user can create customized text labels and log the system parameters for process and product improvement

• The user can interact and have confidence in the optical power that any individual laser is providing and match this with other sensors in the application with a few simple keystrokes.


StingRay Advantage - Optics

• Coherent has invested almost two years to re-invent the design, manufacturing and testing of common Powell optics. This new optical system provides an automated fabrication and testing process to ensure the most accurate and repeatable optical system possible.

• Features:• 100% of the line is usable• 95% Contained Power• +/- 7.5% Uniformity• 0.1% Straightness• Higher repeatability• Better safety class management • Less time to integrate

• The repeatability of these laser lines from laser to laser, enables the user to quickly and repeatable set up the complete sensor integration limiting additional calibration or compensation routines providing a more repeatable sensor with less effort.


StingRay Advantage – The Customer

• The features and performance of the StingRay laser provide current and future benefits to the Machine Vision community in multiple ways.

• First the accuracy and repeatability of the laser lines generates a return signal that is not biased by the line profile rather the profile of the item under investigation.

• This accuracy generates repeatability in the systems creating better sensor to senor accuracy and repeatability to the user, effectively eliminating the need for additional integration time and specific calibrations.

• With the advancements in the optical system, the StingRay delivers >95% of the laser power into the measurement line dramatically improving signal to noise, use of power and better control of safety classifications.


KEY PARAMETERS


Definitions

Specification Standard Spec Description DefinitionFan Angle / Line Length

+/- 5% Length of Flat Top Profile As defined by the customer, taken at the 80% Clip

Uniformity +/- 7.5% Intensity Variation of useable line

Contained Power >95% Power contained within defined Flat Top Ratio of the power contained the in the line to the total power at 1/e2

Straightness 0.1% Max deviation from best fit line

RI Floor >75% Minimum Intensity at any point along the FT profile FA < 45 degrees

Relative to the 100 intensity point in the profile

>60% Minimum Intensity at any point along the FT profile FA > 45 degrees

Relative to the 100 intensity point in the profile


What is a ALG?

• An Aspheric Line Generator optic is an aspherical cylinder lens that transforms a Gaussian laser beam into a uniform line.

10/25/2012


Asphere + Cylinder Lens = ALG

• ALG – Aspheric Line Generator

• Migration from the simple roof prism to a complex, highly optimized optical element

• Cylinder lens concept forms a line

• Asphere concept allows us to redistribute energy within that line

10/25/2012


Example StingRay Optics - 45 degree Standard Focus

November 25, 2008

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

100 200 300 400 500 600

Intensity

Position

Overlay of multiple profiles


GUI

• StingRay Connect

Multiple Lasers from the same interface

Query Status and laser specific information

Set Preferences

Documents

StingRay The Smartest Laser in Vision - VDMAibv.vdma.org/documents/256550/1221336/THU_1230_Coherent_Stin… · StingRay Advantage – The Customer • The features and performance