BCTF-50 – Backlit Calibration Target Fixture

The BCTF-50 – Designed for glass calibration targets

 

BCTF-50 Technical Features

  • Battery powered backlight illumination
  • 6h run time / 1h charge via Micro USB
  • Adapter for microscope targets
  • Rotational axis for tilting in grid centre
  • Shifting via x-y-z stage
  • Tensile testing machine clamp adapter
  • Target exchange via clip fixture
  • For max. target size of 50 x 50 mm
  • available with different clamping adapters for flat or round specimens (see below)

 

 

            

 

For further information, a quotation or in case of any questions, please don’t hesitate to contact us via info@isi-sys.com

Speckle Pattern Application Kit

The Speckle Pattern Application Kit for the easy and fast production of a perfect speckle pattern for your DIC application!

The correlated solutions speckle components provide the production of ideal speckle pattern which is important for good signatures throughout the area of interest so that consistent sized subsets may be tracked with certainty

 

 

Characteristics and advantages:

  • High contrast, quick preparation
  • Precision: Optimised and consistent dot sizes
  • 50 % coverage: equal amount of black and white
  • Random: Perfect mixture between irregular and regular pattern
  • Result: improved higher spatial resolution due to optimised subset size and highly reduced noise

 

Why a good speckle patter is required?

In DIC, a mesh of small subsets of the image are tracked as the specimen moves and deforms. To perform this tracking, the subsets are shifted until the pattern in the deformed image matches the reference image as closely as possible; this match is calculated by the total difference in grey levels at each point. A good pattern will allow the correlation to be made with high confidence and produce low noise. The example below shows the uncertainty for the out of plane measurement data in Z-direction with different speckle patterns.

 

 

In order to provide consistent speckle patterns for various sample sizes and materials, the speckle kit includes:

 

Stamp Rollers (6 sizes):

  • 0,18mm dot size for 53 – 145mm FOV*
  • 0,33mm dot size for 102 – 296mm FOV*
  • 0,66mm dot size for 203 – 539mm FOV*
  • 1,27mm dot size for 389 – 826mm FOV*
  • 2,45mm dot size for 762 – 2032 mm FOV*
  • 5,08mm dot size for 1524 – 4064 mm FOV*

Flat Stamp Rockers 146 x 146mm (6 sizes)

  • 0,18mm dot size for 53 – 145mm FOV*
  • 0,33mm dot size for 102 – 296mm FOV*
  • 0,66mm dot size for 203 – 539mm FOV*
  • 1,27mm dot size for 389 – 826mm FOV*
  • 2,45mm dot size for 762 – 2032 mm FOV*
  • 5,08mm dot size for 1524 – 4064 mm FOV*
  • Rocker for Flat Stamps

Accessories:

  • extra ink
  • ink pad
  • hard padded carrying case

 

* recommended FOV (image width) for standard 5Mpx sensor with 2500x2000px. Alternatively check dot size, which should be minimum about 3x3px.

 

For further information, a quotation or in case of any questions, please don’t hesitate to contact us via info@isi-sys.com

Polarization filter for HEDLER LED

NEW! The new isi-sys polarization filter for HEDLER LED

The major reason for applying light forming equipment in DIC is to avoid direct reflections. The HEDLER Profilux LEDs can be equipped with different light forming accessories such as usually applied in conventional photo studios. Some of them are also suitable for DIC. isi-sys can recommend suitable accessories for your application.

However the first basic recommendation is to set up the light source independently from the DIC system to adjust a suitable illumination direction. In a number of applications this is sufficient and these accessories can be avoided, which is of advantage, because their application is combined with light losses.

A highly recommended item is the new isi-sys polarization filter especially developed for the high power Hedler LED 1000, which helps to work on strongly curved and shiny – even wet – surfaces, when combined with suitable polarisation filters on the DIC stereo system

HEDLER LED light sources

isi-sys offers various light sources from Hedler, in particular the following products, for which we also offer a polarization filter specially developed by us (read more>>):

 

LED1000

Focusable white LED light source with 185W, continuous wave

 

 

The HEDLER Profilux LED1000 is a new developed continuous light unit which generates with one high power single LED daylight quality with approx. 5600K and a CRI > 90 – flicker-free! It has an extremely quiet fan cooling and a special, active LED cooling; the LED has an average lifetime of approx. 50000 hours.

It comes with:

  • Fresnel lens
  • 185 Watts high power single cell LED
  • Integrated Electronic Ballast
  • U-bracket with 5/8″ quick-lock light stand attachment and friction brake plus the HEDLER QuickFit adapter for comfortable and fast interchanging of reflectors.

 

 

LED 650

70° expanded white LED light source with 75W continuous wave

 

 

LED 1000x

75°expanded white light source with 185W continuous wave

 

Note: The LED 650 and 1000x are only recommended for large FOV >1m applications at short object distances for cost reasons. Operation with separate light stand or tripod recommended, as without focusing such as for LED 1000.

Blue-X-Focus – LED light source

The new LED light source with 200W @ 100Hz and 1μs flash period

 

The Blue-X-Focus is a powerful LED light source, especially designed by isi-sys for digital image correlation:

  • The short, single wave length (blue) improves the optical transfer function properties especially a) at the image boarders for conventional lenses and b) for high resolution, small FOV set-ups such as the Micro 3D stereo sensor.
  • The pulse mode reduces motion blur and maximizes light power at lowest possible heating of the object surface
  • Large beam expansion range from 3,2° to 60° for small to large field of view. Operation through small windows
  • A polarization-filter (optional) is suppressing direct reflections in combination with a second pair for the sensors
  • The short wavelength can be used in combination with bandpass filters for measuring on hot samples

 

Further details:

  • Power: Standard operation with 80W in continuous mode or 120W for pulse mode depending on duty cycle. Example for 0,7 duty cycle: 105W @ 240Hz and 2,9ms flash period. Power adjustable manually or external by pulse length and frequency as well as automatically limited depending on temperature.
  • The focusing adapter for standard DIC is from 5° to 60° expansion. The version for small FOV is adjustable from 3,2° to 4,7° expansion corresponding to e. g. 5mm x 3mm at 53mm WD or 300mm x 140mm at 1800mm WD (working distance)
  • Mounting is possible horizontal or vertical via M6 or ¼” threads
  • The cooling air stream is directed from the front inlet to the backside to avoid hot air waves in the images.Power: Standard operation with 80W in continuous mode or 120W for pulse mode depending on duty cycle. Example for 0,7 duty cycle: 105W @ 240Hz and 2,9ms flash period.

 

Application example for DIC on small FOV (magnification 1:1 approx. 14x10mm @ 12Mpx, Rodagon 135mm)

 

 

DAQ Devices

The isi-sys DAQ devices are set up for operation with the Vic software for Digital Image Correlation (DIC) by Correlated Solutions and function as integral part of isi-sys turn-key DIC systems. They mainly serve for triggering the cameras (hardware trigger) and simultaneously recording analog data as well as for delivering analogue real-time output generated by the Vic-Gauge software.

There are three DAQ types with different performance and features (and pricing):

 

DAQ-STD-8D

Only the DAQ-STD- 8D Synchronization- / Trigger Device can be used for synchronization of the cameras via a periodic signal (supported by the Fulcrum Module of Vic-Snap or the isi-sys synchronisation software module / isi-Studio

 

 

 

 

 

DAQ-T8D-16

 

Isi-sys also offers a 16-bit device – the DAQ-T8D-16. Both devices have +/-10V output channels.

 

 

 

 

 

 

DIC-DAQ-Box-klein
The DAQ-T4D-12 is a 12bit device with 5V analog output

 

 

 

 

 

 

 

Camera Trigger & Power supply

Hardware triggering and the power supply for the cameras are transmitted via the 12-pin Hirose connectors on the DAQ device. Two of these connectors are available for connecting up to two cameras. Isi-sys also offers Y-cables for operating 4 cameras (two stereo systems) or more. It is also possible to operate more than two cameras with one DAQ device. We will be happy to advise you.

 

Computer Connection 

Connection to a computer is done by USB cable (type A <-> type B connector).

 

Analog inputs

isi-sys DAQ devices are available with either differential or non-differential analog inputs. The analog input connectors are BNC type, the range is +/-10V.

 

Further IO connectors

Besides analog inputs, all isi-sys DAQ devices can also be equipped with analog outputs (BNC type connector), which differ in voltage range depending on DAQ type. Digital IO connectors (BNC type) are available as well.