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Liquid lenses allow imaging systems to overcome Depth of Field (DOF) limitations by allowing the focus to be electronically adjusted without requiring any mechanical movement. This can be a great solution for applications with varying object heights and working distances.
Traditional solutions for these types of applications include motorized zoom lenses or physically repositioning the object to bring it into focus. Another way to increase the DOF in a traditional lens is to increase the f/# by reducing the aperture size of the imaging lens.
However, this can also reduce the resolution and amount of light that gets through the imaging system, thereby increasing acquisition rates and reducing image quality. By integrating a liquid lens, an imaging system can change focus electronically without compromising speed or image quality, regardless of the object’s distance from the camera.
Like traditional optical lenses made from glass, liquid lenses are single optical elements, but are composed of an optical liquid material that can change its shape. The focal length of a glass lens is dependent on the material it is made from and its radius of curvature.
The same basic principle applies to liquid lenses, though liquid lenses are unique in that they can change their focal length by altering their radius of curvature. This change in radius is electronically controlled and rapidly changed on the order of milliseconds.
Manufacturers use technologies ranging from electrowetting to shape changing polymers to control the radius of curvature and index of refraction of the liquid lens.
The Global liquid lens Machine vision camera market accounted for $XX Billion in 2023 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2024 to 2030.
Tech Spec 16mm FL, Liquid Lens M12 Lens – The 16 mm lens provides a higher quality image than the 6 mm lens. It has a narrow-angle view which is more suited to viewing distant objects.
Ensure the C-CS adapter that comes with the High-Quality Camera is fitted to the lens. The lens is a C-mount device, so it has a longer back focus than the 6 mm lens and therefore requires the adapter. Rotate the lens and C-CS adapter clockwise all the way into the back focus adjustment ring.
The back focus adjustment ring should be screwed in fully. Use the back focus lock screw to make sure it does not move out of this position when adjusting the aperture or focus. To adjust the aperture, hold the camera with the lens facing away from you. Turn the inner ring, closest to the camera, while holding the camera steady.
Turn clockwise to close the aperture and reduce image brightness. Turn anti-clockwise to open the aperture. Once you are happy with the light level, tighten the screw on the side of the lens to lock the aperture into position.
To adjust focus, hold the camera with the lens facing away from you.
