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Precision Kinematic Mirror Mounts


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Precision Kinematic Mirror Mounts

Features

  • Improved Stability from Thicker Back Plate and Stiffer Springs than our KM Series Kinematic Mounts
  • ±4° Kinematic Mounts Available for Ø1/2", Ø1", Ø2", Ø3", and Ø4" Optics
  • Lockable Adjusters:
    • Three: Ø1/2", Ø1", and Ø2" Optic Mounts
    • Two: Ø3" and Ø4" Optic Mounts
  • Differential Adjuster Option Available for Ø1" and Ø2" Optical Mounts
  • Mounting Holes Enable Left-Handed or Right-Handed Operation
  • Off-Center Mounting Options (Excludes KS05, KS05K, and KS1)
  • Fabricated from Black Anodized Aluminum

These Precision Kinematic Mirror Mounts provide lockable adjusters in combination with a rigid mechanical design to achieve long-term stability. Compared to our standard KM Series Kinematic Mirror Mounts, these mounts incorporate a thicker back plate and stiffer springs. The lockable adjusters reduce drift for long-term stable operation. All of the mounts featured on this page offer ±4° of angular adjustment.

The Ø1" and Ø2" mounts are available with differential pitch and yaw adjusters, thereby allowing for very fine angular adjustments. Minimum angular movements of 3 and 1.5 μrad are possible with the Ø1" (KS1D) and Ø2" (KS2D) options, respectively (please see below for more details).

Thorlabs offers a variety of other two and three adjuster mirror mounts including our high-stability Polaris™ Mirror Mounts.

Item #Optic DiameterMinimum
Optic Thickness
Optical Axis HeightAngular AdjustmentNumber of AdjustersType of AdjustersThreadResolutionaClear ApertureMounting
KS05(/M)1/2"
(12.0 mm)
0.12"
(3.0 mm)
0.58"
(14.7 mm)
±4o3Hex Socket3/16"-1009.1 mrad/revØ0.47"
(Ø11.9 mm)
8-32 (M4) Tapped Holes, 2 Places
KS05K(/M)1/2"
(12.0 mm)
0.12"
(3.0 mm)
0.58"
(14.7 mm)
±4o3Removable Knobs3/16"-1009.1 mrad/revØ0.47"
(Ø11.9 mm)
8-32 (M4) Tapped Holes, 2 Places
KS11"
(25.0 mm)
0.16"
(4.0 mm)
1.0"
(25.4 mm)
±4o3Removable Knobs1/4"-807.4 mrad/revØ0.94"
(Ø23.9 mm)
#8 (M4) Counterbored Holes, 2 Places
KS22"
(50.0 mm)
0.20"
(5.0 mm)
1.56"
(39.6 mm)
±4o3Removable Knobs1/4"-804.8 mrad/revØ1.94"
(Ø49.3 mm)
#8 (M4) Counterbored Holes, 6 Places
KS33"
(75.0 mm)
0.28"
(7.1 mm)
2.13"
(54.1 mm)
±4o2Removable Knobs1/4"-805.0 mrad/revØ2.82"
(Ø71.5 mm)
#8 (M4) Counterbored Holes, 4 Places
KS44"
(100.0 mm)
0.28"
(7.1 mm)
2.70"
(69.0 mm)
±4o2Removable Knobs1/4"-803.9 mrad/revØ3.94"
(Ø100.1 mm)
#8 (M4) Counterbored Holes, 4 Places
KS1D1"
(25.0 mm)
0.16"
(4.0 mm)
1.0"
(25.4 mm)
±4o3Removable Knobs1/4"-80 / M3 x 0.40 /
M3 x 0.375b
660 μrad/revØ0.94"
(Ø23.9 mm)
#8 (M4) Counterbored Holes, 2 Places
KS2D2"
(50.0 mm)
0.20"
(5.0 mm)
1.56"
(39.6 mm)
±4o3Removable Knobs1/4"-80 / M3 x 0.40 /
M3 x 0.375b
400 μrad/revØ1.94"
(Ø49.3 mm)
#8 (M4) Counterbored Holes, 6 Places
  • This value is the calculated angular displacement of the front plate using the linear distance the adjuster translates (initial condition: front and back plates are parallel)
  • Information on how the differential adjusters work is located in the How it Works tab
Differential Drive
Click to Enlarge

Shown above is the KS2D Ø2" Differential Adjuster Mirror Mount with Provided Hex Key

Differential Adjuster

The 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
Referring to the drawing below, knob "A" is fastened to the 1/4"-80 externally threaded main body "B" and provides the coarse angular adjustment of the kinematic mount, shown below. The knob can be removed to expose a 5/64" kex socket, which can also be used for coarse adjustments. The coarse adjuster (1/4"-80 threaded main body) is standard on all precision mounts except the KS05(/M) and KS05K(/M), which each feature a 3/16"-100 threaded main body.

Differential Drive
Click for Details

Schematic of the Differential Adjuster Mechanism

Fine Adjustment
The main body "B" is internally threaded with an M3 x 0.40 thread. This thread holds the intermediate actuator "C", which can be rotated by a hex wrench. The intermediate actuator is both internally and externally threaded, allowing a differential movement to be achieved between parts "C" and the push rod "D".

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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Posted Comments:
Poster: jlow
Posted Date: 2014-01-07 08:28:56.0
Response from Jeremy at Thorlabs: The KS4 uses 1/4"-80 adjusters so the screw pitch would be 1/80 of an inch (0.3175mm).
Poster:
Posted Date: 2014-01-07 12:05:55.273
I would like to know the pitch of the thread of a KS4 mirror mount. You've stated the thread type but this thread can be fine or superfine, having different pitch...
Poster: hambitza
Posted Date: 2013-06-26 14:05:38.307
I know that the resolution of a mirror mount is usually determined by the pitch size of the screw. However, I am asking myself in which steps I can actually turn the screw. For example, could I turn the screw by 5 or 10 degree by hand? For me the final resolution would be determined by the fine adjustment steps in which I can change the mirror angle.
Poster: cdaly
Posted Date: 2013-07-02 11:02:00.0
Response from Chris at Thorlabs: Thank you for using our feedback tool. This is somewhat subjective to the ability of the user, but with a simple hex key rather than a ball driver, it should be possible to get somewhere in the range of 2-6 degrees of revolution of the lead screws pretty reliably.
Poster: bdada
Posted Date: 2012-02-13 15:19:00.0
Response from Buki at Thorlabs: Thank you for your valuable feedback on the KS1 and KM100 families. I have brought up your idea of a standard mounting screw with our design engineers. We do not have your contact information, so please email TechSupport@thorlabs to discuss this matter further.
Poster:
Posted Date: 2012-02-11 16:26:01.0
I mix different mirror mounts in the KS1 and KM100 families, the mounting screw has a different length for each family, would you consider making one standard. Murphy's law comes into play here as i always have the wrong screw.
Poster: bdada
Posted Date: 2011-11-07 14:10:00.0
Response from Buki at Thorlabs: Thank you for participating in our Feedback Forum. The Polaris is designed to provide the ultimate in thermal stability so we expect it to perform better than our Ultra Stable Kinematic Mirror Mounts. We will run some tests to compare the performance of the Polaris to these mounts. Please contact TechSupport@thorlabs.com if you have further questions.
Poster:
Posted Date: 2011-11-05 00:52:46.0
Can you do thermal testing on these mounts so I can compare to the Polaris. I think they might be just as good but not sure.
Poster: jpang
Posted Date: 2007-12-19 10:34:48.0
It would be helpful to have all maximum angular range listed for all your kinematic mirror mounts.
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Ø1/2" Precision Kinematic Mirror Mounts
Ø1/2” Precision Mirror Mount
Click to Enlarge
Front view of both the KS05 and KS05K Precision Mirror Mounts
  • Optics Secured in Double-Bored Hole with Nylon-Tipped Setscrew
  • Thick Back Plate and Heavy-Duty Springs for Stability
  • Hardened Stainless Steel Inserts at Kinematic Contacts Reduce Wear

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 front and back plates than our KM Series, 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 ±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 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 space-limited setups where a balldriver or hex tool cannot be used.

Item #Optic DiameterMinimum
Optic Thickness
Optical Axis HeightAngular AdjustmentNumber of AdjustersType of AdjustersThreadClear ApertureMounting
KS05(/M) 1/2" or
12.0 mm
0.12"
(3.0 mm)
0.58"
(14.7 mm)
±4o 3 Hex Socket 3/16"-100 Ø0.47"
(Ø11.9 mm)
8-32 (M4) Tapped Holes,
2 Places
KS05K(/M) 1/2" or
12.0 mm
0.12"
(3.0 mm)
0.58"
(14.7 mm)
±4o 3 Removable Knobs 3/16"-100 Ø0.47"
(Ø11.9 mm)
8-32 (M4) Tapped Holes,
2 Places

 

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
KS05 Support Documentation
KS05 Ø1/2" Precision Kinematic Mirror Mount, 3 Adjusters
$68.70
Today
KS05K Support Documentation
KS05K Customer Inspired! Ø1/2" Precision Kinematic Mirror Mount with 3 Adjusters and Removable Knobs
$78.00
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
KS05/M Support Documentation
KS05/M Ø12.7 mm Precision Kinematic Mirror Mount, 3 Adjusters, Metric
$68.70
Today
KS05K/M Support Documentation
KS05K/M Customer Inspired! Ø12.7 mm Precision Kinematic Mirror Mount with 3 Adjusters and Removable Knobs, Metric
$78.00
Today
Ø1" and Ø2" Precision Kinematic Mirror Mounts
KS1 On Centering Plate
Click to Enlarge
Mirror in KS1 Kinematic Mount is Centered over the Post Rotation Axis using the KMCP Variable Centering Plate
  • Optics Secured in Double-Bored Hole with Nylon-Tipped Setscrew
  • Thick Back Plate and Heavy-Duty Springs for Stability
  • Hardened Stainless Steel Inserts at Kinematic Contacts Reduce Wear

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 front and back plates than our KM Series, 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, locakable adjusters 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 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).

Item #Optic DiameterMinimum
Optic Thickness
Optical Axis HeightAngular AdjustmentNumber of AdjustersType of AdjustersThreadMounting
KS1 1" or
25.0 mm
0.16"
(4.0 mm)
1.0"
(25.4 mm)
±4o 3 Removable Knobs 1/4"-80 #8 (M4) Counterbored Holes,
2 Places
KS2 2" or
50.0 mm
0.20"
(5.0 mm)
1.56"
(39.6 mm)
±4o 3 Removable Knobs 1/4"-80 #8 (M4) Counterbored Holes,
6 Places
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
KS1 Support Documentation
KS1 Ø1" Precision Kinematic Mirror Mount, 3 Adjusters
$81.40
Today
KS2 Support Documentation
KS2 Ø2" Precision Kinematic Mirror Mount, 3 Adjusters
$124.40
Today
Ø3" and Ø4" Precision Kinematic Mirror Mounts
  • Optics Secured in Double-Bored Hole with Nylon-Tipped Setscrew
  • Thick Back Plate and Heavy-Duty Springs for Stability
  • Hardened Stainless Steel Inserts at Kinematic Contacts Reduce Wear

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.  They incorporate thicker front and back plates than our KM Series, 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.

These mounts incorporate two 1/4"-80 TPI, lockable adjusters and offer ±4° 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.

Item #Optic DiameterMinimum
Optic Thickness
Optical Axis HeightAngular AdjustmentNumber of AdjustersType of AdjustersThreadMounting
KS3 3" or
75.0 mm
0.28"
(7.1 mm)
2.13"
(54.1 mm)
±4o 2 Removable Knobs 1/4"-80 #8 (M4) Counterbored Holes,
4 Places
KS4 4" or
100.0 mm
0.28"
(7.1 mm)
2.70"
(69.0 mm)
±4o 2 Removable Knobs 1/4"-80 #8 (M4) Counterbored Holes,
4 Places

 

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
KS3 Support Documentation
KS3 Ø3" Precision Kinematic Mirror Mount, 2 Adjusters
$179.50
Today
KS4 Support Documentation
KS4 Ø4" Precision Kinematic Mirror Mount, 2 Adjusters
$233.60
Today
Ø1" and Ø2" Precision Kinematic Mirror Mounts - Differential Adjusters
Differential Drive
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. 
  • Optics Secured in Double Bored Hole with Nylon-Tipped Setscrew
  • Thick Back Plate and Heavy-Duty Springs for Stability
  • Hardened Stainless Steel Inserts at Kinematic Contacts to Reduce Wear

These Ø1” and Ø2” kinematic mirror mounts feature locking differential adjusters and a stable mechanical package, which provide long-term stability compared to the KM Series Kinematic 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 ±4° 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.

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.

Item #Optic DiameterMinimum Optic ThicknessCoarse Angular AdjustmentThreadCoarse ResolutionaResolution Using Differential MechanismaMinimum Incremental MovementbMounting StyleAngular Range with Differential MechanismPitch and Yaw Differential Adjuster
KS1D 1" or
25.0 mm
0.16"
(4.0 mm)
±4o 1/4"-80 / M3 x 0.40 /
M3 x 0.375d
8.3 µrad/rev 660 µrad/rev
(136 arcsec/rev)
3 µrad/rev
(0.6 arcsec)
#8 (M4) Counterbored Holes,
2 Places
±1.5° DAS110c
KS2D 2" or
50.0 mm
0.20"
(5.0 mm)
±4° 1/4"-80 / M3 x 0.40 /
M3 x 0.375d
5.1 µrad/rev 400 µrad/rev
(82.5 arcsec/rev)
1.5 µrad/rev
(0.3 arcsec)
#8 (M4) Counterbored Holes,
6 Places
±0.9°
  • This value is the calculated angular displacement of the front plate using the linear distance the adjuster translates
  • Calculated by assuming the user can make 220 discrete adjustments per revolution
  • The DAS110 adjuster lock ring is not included with the KS1D and KS2D mounts because the mounts are designed with internal locking setscrews
  • Information on how the differential adjusters work is located in the How it Works tab
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
KS1D Support Documentation
KS1D Ø1" Kinematic Mirror Mount, 2 Differential Adjusters, 1 1/4"-80 Adjuster
$140.00
Today
KS2D Support Documentation
KS2D Ø2" Kinematic Mirror Mount, 2 Differential Adjusters, 1 1/4"-80 Adjuster
$148.00
Today
5/64" and 2 mm Hex Key Adjusters
POLARIS-K12AH with HKTS-5/64 Adjuster
Click for Details

POLARIS-K1-2AH with HKTS-5/64 Adjuster
  • For Convenient Adjustment of 5/64" and 2 mm Hex-Driven Actuators
  • Red Anodized Adjustment Knob with Engraved Hex Size
  • Replaceable Hex Tip
  • Sold in Packages of 4

These 5/64" and 2 mm Hex Key Adjuster Thumbscrews allow for quick adjustment of many 5/64" (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.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
HKTS-5/64 Support Documentation
HKTS-5/64 Customer Inspired! 5/64" (2 mm) Hex Key Thumbscrew (4 Pack)
$22.50
Today
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Last Edited: Aug 26, 2013 Author: Mike Yanakas