Specs are at middle WD. Field of Views are specified at the mid-curvature range of the liquid lens. Field of View Range and Working Distance Range are specified over the applicable minimum and maximum curvature range of the liquid lens.
Liquid Lens for Extended Depth of Field Telecentric Lens
Up to 2.3 MegaPixels, 4.5μm Pixel Size Sensors
Up to 2/3", C-Mount Telecentric Lens
Magnification from 0.15X to 0.75X
TECHSPEC® MercuryTL™ Liquid Lens Telecentric Lenses combine the capabilities of a telecentric lens with the flexibility of a liquid lens. These lenses combine the unique feature of telecentric lenses, eliminating parallax (or perspective) error, with a liquid lens, allowing for the focus to be electronically controlled. This combination provides quick working distance adjustment, while maintaining telecentricity, distortion, and image performance throughout the entire working distance range. TECHSPEC® MercuryTL™ Liquid Lens Telecentric Lenses are ideal for gauging, measurement, and placement applications where quick depth of field adjustment is required.
As the liquid lens is used to focus the telecentric lens, its curvature changes. As its curvature changes, there will be small changes in the ray angles in the rear of the lens (incident on the image sensor). As a result, there are small field of view changes over the working distance range as the liquid lens refocuses the lens. However, the front (object space) ray angles are unaffected by the liquid lens changing curvature, allowing the telecentric lens to maintain telecentricity over the entire working distance range.
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