Slide show

Non-volatile holographic storage in doubly doped lithium niobate crystals 

Nature 393, 665-668 (18 June 1998)
Photorefractive materials are being widely investigated for applications in holographic data storage1. Inhomogeneous illumination of these materials with an optical interference pattern redistributes charge, builds up internal electric fields and so changes the refractive index.

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3D Scanner

Mephisto 3D Scanning Engine

Highly flexible and intuitive structured light 3D scanning system. Achieve fast, accurate, high quality scanning results with a minimum of processing time and user interaction. Suitable for small and large area scanning of animated as well as static objects.

 

Mephisto 3D Scanning Engine

The Mephisto scanning engine has a wide choice of options and capabilities which enable it to cope with the most complex scanning object and situations. It is possible to use high quality robust machine vision cameras for fast high resolution scanning, or expand the scanning range with a Canon DSLR for higher resolution and higher dynamic range.

The optical nature of the scanning system means that typical photographic procedures and tools are readily applicable to enhance results and workflow (like neutral density, polarizing etc filter, lens converters and other photographic gear).

The unique ultra fast algorithm computes a range image and triangulates the mesh at near real time speed. Simple and user friendly interface with project based software workflow means a shallow learning curve.

The Mephisto 3D scanner is based on high quality consumer and reliable machine vision components. This gives the advantage in maintaining low costs, easy maintenance and interchange ability, resulting in low offline time.

System error and precision depend on many factors, at the optimal working distance of 2m using 7 bit Gray code and 6 step fringe pattern it is possible to achieve 0.1 mm. Noise levels are reduced to 0.06 mm using image binning on AVT camera. Error remains consistent, as long as illumination level and contrast ratio is sustained.

  • Working Range 0.8m - 10m
  • Capture Area 0.5 x 0.7m - 6 x 8m

Due to square root falloff rule and ambient illumination influence, please bear in mind error will increase at large working volumes.

 

 

 

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