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Precision Kinematic Mirror Mounts![]()
KS05 Ø1/2" Mirror Mount KS1TV Ø1" Vacuum-Compatible Mirror Mount KS1T Internally SM1-Threaded Ø1" Mirror Mount KS2D High-Resolution KS3 Ø3" Mirror Mount Related Items ![]() Please Wait Vacuum-Compatible ComponentsMany of our optomechanical components can be special ordered for vacuum use. Contact techsupport@thorlabs.com for details. Features
These Precision Kinematic Mirror Mounts take advantage of a rigid mechanical design to achieve long-term stability. Compared to our standard Two Adjuster Kinematic Mirror Mounts, these three adjuster mounts incorporate a thicker back plate and stiffer springs. The lockable adjusters reduce drift for long-term stable operation in all of our mounts except for the KS1TV vacuum-compatible kinematic mount. Locking the adjusters on this mount require installing POLARIS-LN1 lock nuts (not included). All of the mounts featured on this page offer ±4° of angular adjustment. Three-adjuster mounts come with either standard or differential adjusters. Standard adjusters are 3/16"-100, 1/4"-80, or 1/4"-100 threaded screws, depending on mount size, with a stainless steel ball tip. The KS1D Ø1" kinematic mount and KS2D Ø2" kinematic mount are offered with differential pitch and yaw adjusters, which enabling very fine angular adjustments. Our differential adjusters allow for minimum angular movements of 2.91 μrad and 1.45 μrad for the KS1D and KS2D mounts, respectively (see below for more details). Mounts on this page feature two optic retention methods. Kinematic mounts for Ø1/2", Ø1", Ø2", Ø3", and Ø4" optical elements are available with side optic retention via a nylon-tipped set screw. Ø1/2", Ø1", and Ø2" mounts are available with SM-threaded optic cells for compatibility with our lens tubes. Thorlabs offers a variety of other two and three adjuster mirror mounts including our high-stability Polaris® Mirror Mounts.
![]() Click to Enlarge Shown above is the KS2D Ø2" Differential Adjuster Mirror Mount with Provided Hex Key Differential AdjusterThe KS1D and KS2D come with two differential adjusters and one conventional adjuster. The differential adjuster is actuated using either the provided removable hex wrench for fine adjustment or the black aluminum knob for coarse adjustment. The total angular adjustment using the conventional adjusters is ±4° for both the KS1D and KS2D. The angular adjustment using only the differential adjusters is ±1.5° and ±0.9° for the KS1D and KS2D, respectively. Both the KS1D and KS2D use two DAS110 differential adjusters (locking ring not included with KS1D and KS2D), which offer 318 μm of coarse and 25 μm of fine differential movement. A schematic of the differential mechanism is shown below. Coarse Adjustment ![]() Click for Details Schematic of the Differential Adjuster Mechanism Fine Adjustment The external thread of "C" is the same M3 x 0.40 mm thread internal to the main body. When the intermediate actuator is rotated clockwise, it moves out of the main body by 400 μm per revolution. The push rod "D" is connected to the internal thread of "C" via an M3 x 0.373 thread and is restricted from rotating by the main body "B". As "C" is rotated, it advances at the rate of 400 μm/rev, while the push rod retreats at 375 μm/rev. This results in a "differential" motion of the push rod that is equal to the net difference of the pitch of the two threads for total displacement of 25 μm/rev.
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These Precision Kinematic Mirror Mounts are designed for use with either Ø1/2” or Ø12.0 mm optics, are available with or without removable knobs, and provide ±4° of pitch and yaw adjustment. They incorporate thicker back plates than our two adjuster mirror mounts, thereby providing increased stability. In addition to the increased mass of the mount, stiffer springs and hardened inserts at all contact points have been incorporated to enhance the overall performance. The three 3/16"-100 TPI adjusters on each mount allow the ±4º adjustment range to be altered by translating the front plate of the mirror mount. The spacing between the front and back plate of the mirror mount must be 0.065" (1.65 mm) for the adjustment range to be symmetric (i.e., ±4°). When using all three adjusters, 0.250" (6.35 mm) of linear Z translation can be achieved with the KS05(/M), while 0.18" (4.57 mm) is possible with the KS05K(/M). There are two 8-32 (M4) tapped mounting holes located on the mount, which allow for post mounting in either left- or right-handed orientations. Both the KS05(/M) and KS05K(/M) incorporate three 3/16"-100 lockable adjusters. The adjusters on the KS05(/M) are 0.5" long, while those on the KS05K(/M) are 0.75" long. The hex-driven design of the KS05(/M) allows it to fit into smaller areas where most Ø1/2" optic mounts cannot. The KS05K(/M), however, has removable 3/16"-100 black aluminum knobs that offer more comfort and allow for it to be used in setups where a balldriver or hex tool cannot be used.
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Our KS05T(/M) Threaded Precision Kinematic Mirror Mount is designed for use with either Ø1/2” or Ø12.0 mm optics and provides ±4° of pitch and yaw adjustment. For low-stress mounting, two SM05RR retaining rings are included, allowing the optic to be secured using an SPW603 Spanner Wrench. Stainless steel adjuster screws with brass bushings provide smooth adjustment. These mounts incorporate thicker back plates than our two adjuster mirror mounts, thereby providing increased stability. In addition to the increased mass of the mount, stiffer springs and hardened inserts at all contact points have been utilized to enhance the overall performance. An internally SM05-threaded (0.535"-40) optic cell enables compatibility with Ø1/2" lens tubes, as shown in the image to the right. Each mount contains three 3/16"-100 TPI, lockable adjusters that allow the ±4° adjustment range to be altered by translating the front plate of the mirror mount. The spacing between the front and back plate of the mirror mount must be 0.065" (1.65 mm) for the adjustment range to be symmetric (i.e., ±4°). When using all three adjusters, 0.250" (6.35 mm) of linear Z translation can be achieved.
![]() ![]() Click to Enlarge Mirror in KS1 Kinematic Mount is Centered over the Post Rotation Axis using the KMCP Variable Centering Plate
The KS1 and KS2 Precision Kinematic Mirror Mounts are designed to hold Ø1" (or Ø25 mm) and Ø2" (or Ø50 mm) optics, respectively, and provide ±4° of pitch and yaw adjustment. The optic is held by a nylon-tipped setscrew, and pretension screws minimize beam shift when locking. Stainless steel lead screws with brass bushings provide smooth adjustment. Counterbored mounting holes allow for post mounting in either left- or right-handed orientations. These mounts incorporate thicker back plates than our two adjuster mirror mounts, thereby providing increased stability. In addition to the increased mass of the mount, stiffer springs and hardened inserts at all contact points have been utilized to enhance the overall performance. The three 1/4"-80 TPI, lockable adjusters allow the ±4º adjustment range to be altered by translating the front plate of the mirror mount. The spacing between the front and back plate must be 0.120" (3.05 mm) and 0.190" (4.83 mm) for the KS1 and KS2 mirror mounts, respectively, for the adjustment range to be symmetric (i.e., ±4°). When using all three adjusters, the Ø1" and Ø2" precision kinematic mounts can achieve a maximum Z translation of 0.25" (6.4 mm).
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The KS1T and KS2T Threaded Precision Kinematic Mirror Mounts are designed to hold thin Ø1" (or Ø25 mm) and Ø2" (or Ø50 mm) optics, respectively, and provide ±4° of pitch and yaw adjustment. The optic is held in place using the two included SM1RR (KS1T) or SM2RR (KS2T) retaining rings for low-stress mounting. The SM1RR retaining rings can be attached using an SPW606 while the SM2RR retaining rings can be attached by using an SPW604 Spanner Wrench. Stainless steel lead screws with brass bushings provide smooth adjustment. Counterbored mounting holes allow for post mounting in either left- or right-handed orientations. These mounts incorporate thicker back plates than our two adjuster mirror mounts, thereby providing increased stability. In addition to the increased mass of the mount, stiffer springs and hardened inserts at all contact points have been utilized to enhance the overall performance. The KS1T has an internally SM1-threaded (1.035"-40) optic cell, making it compatible with Ø1" lens tubes, while the KS2T has an internally SM2-threaded (2.035"-40) optic cell for compatibility with Ø2" lens tubes. As shown in the image above and to the right, the internal threads can also be used to mount externally threaded adapters, allowing for various components to be mounted such as laser diode modules or fiber collimators. Each mount contains three 1/4"-80 TPI, lockable adjusters that allow the ±4º adjustment range to be altered by translating the front plate of the mirror mount. The spacing between the front and back plate must be 0.120" (3.05 mm) and 0.190" (4.83 mm) for the KS1T and KS2T mirror mounts, respectively, for the adjustment range to be symmetric (i.e., ±4°). When using all three adjusters, the Ø1" and Ø2" precision kinematic mounts can achieve a maximum Z translation of 0.25" (6.4 mm).
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The KS1TV SM1-Threaded Vacuum-Compatible Kinematic Mirror Mount is designed to hold Ø1" (or Ø25 mm) optics up to 0.28" (7.1 mm) thick and provides ±4° of pitch and yaw adjustment. The optic is held in place using the included vacuum-compatible retaining ring. The retaining ring can be attached using an SPW606 spanner wrench. Stainless steel lead screws with phosphor bronze bushings provide smooth adjustment. #8 (M4) counterbored mounting holes allow for post mounting in either left- or right-handed orientations. Vacuum Compatibility Information
![]() ![]() Click for Details Schematic of the Differential Adjuster Mechanism. For more details on the internal operation of the differential adjustment mechanism, please see the How it Works tab above.
These Ø1” and Ø2” kinematic mirror mounts feature locking differential adjusters and a stable mechanical package, which provide long-term stability compared to the two adjuster mirror mounts. The KS1D and KS2D Kinematic Mirror Mounts can hold Ø1" or Ø25 mm, and Ø2" or Ø50 mm optics, respectively. The angular adjustment range is ±4º when the spacing between the front and back plate of the mirror mount is 0.120" (3.05 mm) for the KS1D and 0.190" (4.83 mm) for the KS2D. When using all three adjusters, these mounts can achieve a maximum Z translation of 0.25" (6.4 mm). Two of each mount's three adjusters incorporate our differential drive mechanism (see the How it Works tab above for details). This high resolution drive system has both coarse (318 µm/rev, provided by the screw labeled B in the diagram to the right) and fine (25 µm/rev, provided by the screws labeled C and D in the diagram to the right) adjustment capability. The fine adjustment drive system uses two lead screws; one pushes the center spindle forward at 400 µm per revolution, and one pulls it back at 375 µm per revolution. The resulting total forward motion of the center spindle is just 25 µm per revolution, equating to 660 µrad per revolution for the KS1D and 400 µrad per revolution for the KS2D. The differential drive mechanism is actuated by inserting a hex wrench through the coarse adjuster knob (labeled A in the diagram) and turning the intermediate actuator embedded in the adjuster screw.
![]() ![]() Click to Enlarge KS3 Shown with a PIAK10 Piezoelectric Intertia Actuator
The KS3 and KS4 Precision Kinematic Mirror Mounts are designed to accommodate Ø3" (or Ø75 mm) and Ø4" (or Ø100 mm) optics, respectively, and provide ±4° of pitch and yaw adjustment. In addition to the increased mass of the mount, stiffer springs and hardened inserts at all contact points have been incorporated to enhance the overall performance. These mounts incorporate two 1/4"-80 TPI, lockable adjusters and offer ±4º of angular adjustment. Stainless steel lead adjuster screws with brass bushings provide smooth adjustment. Four #8 (M4) counterbored mounting holes allow for post mounting in either left- or right-handed orientations.
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These 5/64" Hex Key Adjuster Thumbscrews allow for quick adjustment of many 5/64" and 2 mm hex-driven actuators (or standard actuators with the knobs removed). These temporary knobs can be left in the screw's hex socket between adjustments for convenience (see photo to the right). An 8-32 setscrew (5/64" hex) secures the replaceable hex bit, which can be reversed if the tip is stripped. Contact Tech Support to order replacement hex key bits. We offer hex key thumbscrews in sizes from 0.050" to 3/16" and 2 mm to 5 mm. ![]() ![]() Click to Enlarge F25SSK1S has a small diameter and includes side holes for adjustment with a 5/64" (2.0 mm) hex key.
Our F25SSK1S Low-Profile, Removable Adjustment Knobs thread onto our 1/4"-80 F25SS series hex adjusters, which can be found on many of our kinematic mounts, and allow for the use of an adjuster without a hex key. This provides quick and easy adjustments for a broad range of applications. In addition, these knobs feature six equally spaced actuation holes along the outer diameter of the knob that can be engaged with a 5/64" (2.0 mm) balldriver or hex key, as shown in the image to the right. The side holes provide the user with a method for more precise adjustments and allow the user an easier method of turning the knob when access to the knob is limited in an experimental setup. The small diameter (Ø0.35") of this knob also allows kinematic mounts, such as the KS1, to be attached directly to an optical table or breadboard, as shown in the image to the right. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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