One of the most important innovations in the imaging industry, not only used in cameras and lenses, but also in today’s high-end smartphones is anti-shake technology. This technology is divided into two types, that is IS (image stabilization at the lens) and IBIS (image stabilization in the camera body). It makes taking photos easier by ‘compensating’ human hand movements, helping the image to stay sharp, not blurry.
The video explains how it works with both IS and IBIS stabilization on the camera
In a 14-minute strip video, channel Imaging Resource went to find out the principles of IS and IBIS operations thanks to the help of Hisashi Takeuchi – Chief Technology Development Officer of Olympus. According to his explanation, the anti-vibration system needs to deal with vibration from five axes: up and down, right and left, the direction of camera rotation, vertical rotation and rotation around the lens axis. The lens stabilizer (IS) system can carry out 4 movements, while the rotation will have to be done by IBIS by moving the image sensor itself.
Olympus E-M5 Mark III anti-vibration sensor
To perform anti-shake, the camera will have to be equipped with acceleration sensors and gyroscopes like smartphones, thus recognizing the movement from the user’s hands. On a new generation camera, up to 5 motion detection sensors are used to do this job.
The motion information, after being processed by the CPU in the body, will be transmitted to the IBIS system to create the opposite movements, so that the image is always parallel to the sensor, not being moved throughout. The shutter program is opened, keeping the image free of blur.
Motion support system for sensors with IBIS
Sensors in cameras with IBIS are placed on a frame with copper coils around (chokes), placed between the magnet plates. By introducing electric current into the coil, it creates a magnetic field and moves through the thrust of the magnet – quite similar to the principle of the diaphragm used in headphones. All of these components, when operating in harmony, can resist vibration from 5 to 6.5 steps.
The marble keeps the sensor flat with the lens field of view
The in-lens stabilization system works the same way, with motion detection sensors placed within the lens body, and motion-assisted components placed into a single glass element. When this glass component moves, it will ‘bend’ the light towards the sensor rather than shining elsewhere.
Olympus said it took only 3 years to develop the gyroscope to recognize the motion inside their OM-D E-M5 Mark III. It is true that camera companies have applied a lot of sophisticated technology, operating with high precision only to do one thing only: helping users to create better photos!