The TECHSPEC® MercuryTL™ Liquid Lens Telecentric Lenses combine the parallax error correction and high image quality of a telecentric lens with the flexibility of an integrated liquid lens. Watch this video to see how the integrated liquid lens allows for rapid working distance adjustment, while maintaining telecentricity, distortion, and image performance across the entire working distance range.
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The TECHSPEC MercuryTL Liquid Lens Telecentric Lenses from Edmund Optics combine the advantages of a telecentric lens with the flexibility of a liquid lens. The telecentric design eliminates parallax error, while the integrated liquid lens allows for quick working distance adjustment. Liquid lenses are small cells containing optical-grade liquid that change shape when a current or voltage is applied. This causes the focal length and working distance of the liquid lens to shift. By eliminating parallax error, a telecentric lens will always have a constant field of view at any distance away from the lens. This is ideal for measurement and gauging applications. However, conventional telecentric lenses have a fixed working distance and cannot compensate for objects at different distances. In order to inspect objects with depth, the object needs to be repositioned to be in focus, or a different telecentric lens with a different working distance would need to be used. This will add time, slow down measurements and limit throughput. On the other hand, Liquid Lens Telecentrics overcome speed limitations by quickly refocusing to different object distances in milliseconds. A Liquid Lens Telecentric Lens can be utilized in the inspection of circuit boards to check for pin alignment and defects. By simply changing the current, the lens can quickly adjust working distance and refocus on the different pins. Therefore, object space telecentricity is maintained across the entire working distance range and the pin heights do not change with the distance away from the lens. The TECHSPEC® MercuryTL™ Liquid Lens Telecentric Lenses from Edmund Optics are ideal for gauging, measurement, and placement applications. To learn more about liquid lens telecentric lenses, go to www.edmundoptics.com/mercurytl