Italian metrology equipment supplier, Fratelli Rotondi, has released its OptiMe new stereo vision & photogrammetric based measuring system.
It is composed of two high-resolution digital cameras with coaxial illuminators and a structured light projector. The system includes its proprietary software for data acquisition and processing. Furthermore, it can be easily used with any other measuring software on the market.
The top model of OptiMe can acquire up to 7 million points in just a few seconds; this high throughput takes the system a step forward with respect to the common contact Coordinate Measuring Machines (CMM). Moreover, the absence of contacts allows the system to inspect flexible and soft objects, avoiding damage and bending. OptiMe is also capable of acquiring metal surfaces, with no need for part spraying, saving time, costs, and the use of polluting substances.
The system components are fixed to a carbon fiber plate which guarantees rigidity, stability, and very low sensitivity to thermal effects. In addition its lightness (from 4 to 6 kg depending on the model) allows the system to be easily transported, and makes OptiMe particularly suitable for in-situ assessments.
Not only is OptiMe fast and precise, but also versatile with the system working in two operational modes:
Active mode: patterns of structured light are projected onto the object surface and read back by the cameras. In this way, OptiMe acquires dense clouds of millions of points obtaining a 3D representation of the object surface, even when it is smooth and lacks recognizable features. This working mode is particularly useful for both reverse engineering and quality control inspections. Therefore, CAD representations of physical models or, oppositely, comparisons between final products and their CAD models, are indeed possible.
Passive mode: when features such as holes, slots, and margins, are to be detected, it is sufficient to project unstructured light in order to make these characteristics identifiable and measurable by the cameras. If only such characteristics, and no surface, have to be acquired, the structured light projector can be replaced by a simple illuminator, or even completely eliminated, so reducing the weight of the scanning head.
OptiMe is deployed in two main versions: OptiMe-S and OptiMe-L. The former has a field of view of 450 x 340 mm for a nominal working distance of about 1 meter, whilst the latter has a field of view of 2000 x 1500 mm for a nominal working distance of about 2.5 meters. By changing cameras and lens arrangements based on customer needs, customizable models are also possible. The accuracy ranges from 0.01 mm to 0.2 mm according to the field of view.