FRAME HS Shadow System
Ultra-fast imaging
The FRAME (Frequency Recognition Algorithm for Multiple Exposures) technique permits a camera to store several images simultaneously in a single exposure on its sensor. The resulting multiply exposed image is reconstructed by using a sorting algorithm, reconstructs the original images and stores each image individually. From one single exposure of the FRAME-camera, four images of ultra-short events can be extracted. This novel approach opens up new possibilities in „ultra-fast imaging“ at reduced costs.
The FRAME HS Shadow system is fully controlled by LaVision’s DaVis software, providing a convenient user interface to generate the illumination timing and camera control. The integrated FRAME algorithm reconstructs the image series with a minimum of user interaction.
Features
ultra-fast imaging of processes like pulsed spray formation and explosions
4 images at 1MHz frame rate on a standard camera
simple integrated setup of the FRAME illumination
FRAME HS Shadow system
The FRAME HS Shadow system consists of a FRAME illumination unit and a high-resolution still camera with a telecentric lens. Illumination and camera are in line-of-sight arrangement for shadowgraphy. The object under investigation will be placed in between the illumination and camera.
FRAME Shadow illumination unit
The time encoded FRAME technique is based on a FRAME HS Shadow illumination, which projects 4 subsequently encoded images into the measurement region. The FRAME illumination comprises of 4 independent light sources, each equipped with a FRAME pattern generator to encode the 4 images.
FRAME camera
The high-resolution camera is equipped with a telecentric lens in order to provide a parallel imaging arrangement for best FRAME image quality.
The resolution of the reconstructed images is determined by the number of modulation lines used in the illumination unit.
FRAME software
The FRAME illumination unit is fully controlled by DaVis. The timing of each exposure can be set precisely and individually and is fully synchronized with the camera. The FRAME system can be synchronized to any triggering event. Repetitive objects (e.g. pulsed sprays) and single events (e.g. shock tubes & explosions) will be captured using the versatile features of the PTU X timing unit under DaVis control.
The DaVis integrated FRAME reconstruction algorithm processes the camera images and obtains the image sequence in a single processing step.
Specifications
FRAME HS Shadow Illumination Unit
Min. interframe time
1µs
Min. exposure time
1µs
Number of channels
4
Illumination lens
180 mm Nikon f-mount
Working distance
50 - 70 cm
Illumination field of view
12 x 12 mm²
FRAME modulation frequency
40 lines/mm in measurement plane*)
Dimensions
42 x 26 x 13 cm³ (W x L x H)
Weight
5 kg
Operating temperature
10 to 40°C
Power requirements
100 - 230 VAC
FRAME HS Shadow System
Camera
Imager M-lite 5M*)
Effective spatial FRAME image resolution
500 x 400 pixel*)
Max. repetition speed
50 Hz*)
Camera lens
1:1 telecentric lens
Working distance
10 cm
Depth of field
~1 mm
Field of view
12.5 x 9 mm² (W x H)*)
*) other camera models and FRAME illumination with higher modulation frequency available onrequest
Ordering information
Part number
Description
1103448
FRAME HS Shadow illumination unit
1105085
FRAME software package
1101503
Imager M-lite 5M camera
1010610
Telecentric lens 1:1, c-mount, WD=10 cm
商品属性 [Active pixels ] 500 x 400 pixel