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Ø1.5" Damped Posts![]()
HeNe Laser in C1503 Application idea Four 1/4" (M6) Counterbores for Mounting DP14A DP8A DP10A DP12A Related Items ![]() Please Wait ![]() Click to Enlarge Periscope Constructed from a DP14A Damped Post, C1511 Post Clamps, and POLARIS-K1 Mirror Mounts ![]() Click to Enlarge Damped Posts Feature an Engraved Top Cap Indicating the Item # as well as a 1/4"-20 (M6) Tapped Hole Features
These Dynamically Damped Ø1.5" Mounting Posts offer a vibration-limiting alternative to long lengths of Ø1.5" solid steel posts. Damped posts are ideal for applications where mechanical vibrations must be limited, such as beam steering and imaging. Ring down testing was performed to compare the damping times for damped carbon steel and solid stainless steel posts (see the Ring Down Test tab for a summary of the test results). Damped posts are available in four lengths: 8" (203.2 mm), 10" (254.0 mm), 12" (304.8 mm), and 14" (355.6 mm). The damped posts are fabricated from steel with a nickel-plated matte finish and utilize internal damping weights containing no lead. Using an engineered passive vibration dampening design, an internal suspension system allows weights inside the post to move independently from the post's outer body, thus allowing vibrational energy to quickly be absorbed and dissipated. On imperial versions, the permanently attached mounting base has four 1/4" counterbores for breadboards with a 1.00" hole spacing, while the metric versions have M6 counterbores for breadboards with a 25.0 mm hole spacing. The top cap is engraved with the part number for identification. The posts also feature a top-located 1/4"-20 (M6) tapped hole to allow components to be secured to the top of the post.
![]() Click to Enlarge Initial Setup for Ring Down Test of DP10A Damped Post Ring Down TestA ring down test is performed on our damped and standard Ø1.5" posts to quantify the time needed to dampen vibrations to a minimum. To do this, a rig is set up (shown in the image to the right) that is designed to strike the test post with approximately 13 N of force (determined by measuring the peak force using a force gauge) by releasing a steel-ball-tipped lever arm that is held at a pre-determined height using a pin. A piezoelectric accelerometer, mounted flush to the top of the test post and aligned with the strike point of the lever arm, measures and records the acceleration of the post due to vibrations as a voltage signal. Because loads mounted to the post increase its vibration damping ability, no additional load is added during testing. Therefore, the results presented below represent the worst-case scenario for vibration damping. In each set of test results shown below, both damped and standard posts are tested to compare the damping time (time it takes to reduce the amplitude of vibrations by 99%). For all post lengths tested, the damped posts dissipate the vibrational energy in a significantly shorter time frame than a standard post. See below for graphs from individual test runs.
8" (203.2 mm) Long Posts10" (254.0 mm) Long Posts12" (304.8 mm) Long Posts14" (355.6 mm) Long Posts![]() Click to Enlarge DP14A Packaging ![]() Smart Pack Goals
Thorlabs' Smart Pack Initiative is aimed at minimizing waste while providing adequate protection for our products. By eliminating any unnecessary packaging, implementing design changes, and utilizing eco-friendly materials, this initiative seeks to reduce the environmental impact of our
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