Dalsa line scan polarization camera makes invisible visible!

Teledyne Dalsa has released the first line scan polarization camera for machine vision.  The Piranha4 polarization camera provides the capability of detecting , stress, surface roughness,  birefringence and physical properties undetectable with conventional imaging making the invisible visible!

This unique technique uses four polarization channels with a color line scan camera solving various applications, but not limited to the following:

Glass Inspection:  Glass bottles, architectural glass sheets, and automobile windshields, etc. – Enables inspection of internal stress and defects non-visible with conventional imaging

Dalsa Polorized ruler

Film inspection: transparent films, packaging films, and patterned films etc. - Detect scratches, digs, and other surface defects that are difficult to detect with conventional imaging   Dalsa Polarized scratch

Precision optics: optical lens, prisms, fibers, and micro-optical - Detect residual internal stress and thermal annealing effects
polarized - stress in sun glasses

Flat Panel Display and PCB inspection: Thin film transistors, organic LEDs, printed circuit boards etc.- inspect ITO, dust particles, films thickness, and surface defects with enhanced contrast

Carbon fibers: effectively inspect the quality of composite materials that are widely used in aircraft, aerospace, wind energy, and automotive industry

Food and material sorting: Increase sorting accuracy and detecting capability of foreign materials such as plastics, glasses, metals etc. with polarization imaging

Bio-medicine: digital pathology, in vitro cells culture, optical coherence tomography etc.- Provides additional information in birefringence tissues
Remote sensing: helps identifying special objects from natural background
And many more…

Contact 1st vision

 

Line scan polarization camera Features

  • CMOS Quadlinear sensor  - 2048 pixels
  • High speed line rate of 70k hz with 14.08 um pixels
  • Camera Link interface
  • Three polarization states plus and unfiltered channel (Output format with 0 deg (S component), 90 deg (P component), 135 deg and unfiltered polarization states.)

Full specifications on the Teledyne Dalsa polarization camera ( P4-CP-02K07Q-00-R ) can be found HERE

line scan camera Polarization angles

 

 

 

 

 

 

 

 

White Paper  - Learn about this unique polarization technique with line scan cameras!   This white paper covers the following topics

  • How polarization techniques work in transmission and reflectance configuration
  • Comparison of three polarization filter technologies
  • How the sensor architecture is configured for polarization effects and visualization of defects.

line scan polarization camera white paper

 

 

 

 

 

1stVision has a strong working knowledge of polarization techniques, line scan cameras and lighting and can discuss your application in detail.

Contact us to talk to an expert!

 

 

Related Blog posts:
Teledyne Dalsa release of low cost GigE and camera link color line scan cameras

Video Tutorial:  How to setup HDR Imaging in Teledyne Dalsa Linea Line scan cameras

Learn how liquid lenses keep continuous focus on machine vision cameras when the working distance changes.

Optotune focus tunable lenses
Optotune lenses
Optotune lenses

Optotune lenses solve a machine vision industry problem! 

IDS Imaging camera with Optotune lens

Machine Vision applications requiring the inspection of objects at various heights can become a challenge as normal lens have limited depth of field.  Objects outside of the depth of field become out of focus, limiting the vision application.  Historically, a lens with motorized focus adjustment would be implemented adding complexity, cost and long cycle times.  In reality, this challenge is applicable to any imaging application requiring refocusing due to various lens working distances.

Optotune Focus tuneable lenses solves this problem eliminating motorized zoom lenses or manual intervention.

Click here NOW for full detail specifications on tunable lenses

Adding an Optotune tunable liquid lens to the optical system on a standard C-mount lens and camera, allows refocusing of the imaging system on the fly.   When used in conjunction with distance sensors, its possible to  inspect objects of various heights, refocusing within 15 milli-seconds.

For example, vision systems using 8mm to 50mm focal length lenses can be equipped with a tuneable lens in the front, typically mounted on the filter thread.  In this configuration it is possible to focus from infinity down to about 100mm  or less if spacers are added.

This solution can be applied to industrial machine vision applications, ophthalmology, laser, microscopy, postal, packaging and laser applications to name a few.

Contact 1stVision for a quote on Optotunes Tunable lenses

Technology 411
 Optotune’s focus tunable lenses are shape-changing lenses based on a combination of optical fluids and a polymer membrane. The core element consists of a container, which is filled with an optical liquid and sealed off with a thin, elastic polymer membrane. A circular ring that pushes onto the center of the membrane shapes the tunable lens. The deflection of the membrane and with that the radius of the lens can be changed by pushing the ring towards the membrane or by exerting a pressure to the outer part of the membrane or by pumping liquid into or out of the container.
Watch this video to see the Optotune liquid lens in action

Advantages

A change in lens radius of several micrometers can have the same optical effect as moving the entire lens several centimeters. In turn there are several advantages

  • Optical systems can be designed more compact, oftentimes with less lenses and usually with less or no translational movement.
  • Large working distance ranges can be achieved
  • Eliminate expensive mechanical actuators resulting in a more robust design, which can be completely closed so that no dust can enter.  Essentially no moving parts for long life cycles (> 1B cycles)
  • Weight and volume is reduced in the system.
  • Low power consumption.
  • Fast response time of systems, down to the order of milliseconds.
  • Easy installation and remote focus control
  • Advanced controls for very accurate and repeatable control of the lens using Gardasofts TR-CL180 controllers

Want to know more?  Download Optotunes comprehensive white paper here 

This white paper will review the overall principles of tunable lenses, response times, wavefront quality, drive methods, and applications.

Contact 1stVision for a quote on Optotunes lenses and discuss an overall solution with cameras, lenses and lighting if required. 

10 key things you need to know when selecting a machine vision lens

Improper selection of the correct quality and type of machine vision lens can make your camera selection useless!

In many cases, we see customers attempting to choose a low quality lens for a camera that really needs quality optics to resolve the pixel sizes. Conversely, we also see customers trying to over specify a lens, where you simply need a lens that’s “good enough”


1st Vision has a white paper to help in the lens selection and provide valuable knowledge on various topics to make the best decisions. 

 

In this comprehensive white paper, you’ll learn the following

  1. Background basics on lenses and what they really do!
  2. The science in some basic formulas to calculate MAG, focal length and angular FOV
  3. What are extension rings used for?
  4. How are lenses rated?  MTF explained
  5. The myth behind “Megapixel” lens ratings
  6. How many pixels do I really need?
  7. What is the ” f# ” of a lens
  8. What does the “lens format” mean?
  9. Comparison of lens types from security to Factory Automation (FA)
  10. How to get some practical advice!

Download the White Paper

1st Vision has many other resources in our educational blogs.  Please find related links to lenses below.  

We are happy to discuss your imaging application in details  Just contact us!

Links:

 

White Paper – Key benefits in using LED lighting controllers for machine vision applications

 

A successful, cost-effective application of a Machine Vision system is often dependent on the interplay of many individual elements, including machine vision lighting.  As much as an Light Emitting Diode (LED) appears to be a basic electronic component, driving it in a fashion suitable for machine vision applications is non-trivial.

LED’s have become the staple in industrial imaging applications in which consistent illumination is key.  In order to achieve constant illumination and synchronization with cameras, controllers from Gardasoft should be utilized.  

Download the full white paper 
here NOW 

  



Why use a LED Lighting Controller?

LED Light Controllers are an essential element of any vision system which needs to optimize illumination intensity and precision trigger sequencing between vision cameras and lights. The following are the main areas where you will benefit from the use of an LED light controller:

Pulse (or strobe) control
Where you need to synchronize the ON time of your light with the camera and target product (controllers are available for nano-second timing resolution)

Overdriving
Where you require increased intensity from your LED light for a short, defined, period of time (with up to 10x over driving capability)

Continuous current power supply (constant light)
Where you require a highly stable constant current supply for constant on LED lighting

Control of multi-lighting schemes
For systems with multiple lighting configurations which require intensity control and high speed synchronization (from single or multiple triggers)

Remote configuration changes
For systems where it is advantageous to have remote setting of lighting system parameters – eg: to facilitate efficient set-up during system commissioning


LED Technology Overview

LEDs are current driven devices.  While LED Lights are specified as either 12V or 24V lights, the actual LEDs are semiconductor devices whose light output is a direct result of the current through the device, not the voltage. 

All LED device manufacturers specify that current control is advised for efficient use.  Typically, LED datasheets will indicate that very small changes in LED voltage results in large changes in the LED current; and large changes in LED current results in large changes in light output intensity. 

As seen in the diagram to the right, small changes in forward voltage (Vf),greatly change current ( If )

Gardasoft LED controllers regulate the current, not the voltage, so that light output is stable, tightly controlled and highly repeatable. 

Controlling the current allows for precise control of the LED light output, with an additional   benefit to users looking to overdrive their lights to increase light output.


There are many advantages of accurate pulsing and over driving LED’s.  However it is also extremely important to ensure LEDs are over driven safely to ensure long life and not catastrophic failure.   

In this white paper, the following topics are covered:

  • An overview of LED technology
  • How to pulse and overdrive LEDs safely using Gardasoft’s patented “SafeSense” technology
  • Three trigger modes from constant, pulses and switched for various applications.
  • How “SafeSense” technology determines the optimum current for consistent LED drive. 
  • Advanced and custom controller functions.  Example – allowing multiple pulses at different intensity levels over various LED channels.  




1st Vision has over 100 years of combined experience in industrial imaging and has a resident lighting expert on hand. 


Contact us for pricing on all Gardasoft controllers and suggestions on your vision and lighting application.  


Ph:  978-474-0044
info@1stvision.com
www.1stvision.com  

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