Features

±4^o Kinematic Mounts Available for Ø1/2", Ø1", Ø2", Ø3", and Ø4" Optics
3 Lockable Adjusters on Models for Ø1/2", Ø1", and Ø2" Optics, 2 Lockable Adjusters on Models for Ø3" and Ø4" Optics
Offers a Thicker Back Plate and Heavier-Duty Springs for Improved Stability, Compared to our KM Series Kinematic Mounts
Differential Adjuster Option Available for Ø1" and Ø2" Optical Mounts
Mounting Holes Enable Left-Handed or Right-Handed Operation and Off-Center Mounting Options (Excludes KS05 and KS1)

The KS Series of Precision Kinematic Mirror Mounts features lockable adjusters in combination with a rugged mechanical design to provide long-term stability. Compared to our standard KM Series Kinematic Mirror Mounts, the KS Series incorporates a thicker back plate and heavier-duty springs. The lockable adjusters reduce drift for long-term stable operation. All KS-Series Kinematic Mirror Mounts offer ±4^o of angular adjustment.

The Ø1" and Ø2" KS Series Mounts are also available with differential adjusters in the pitch and yaw adjuster positions, thereby providing very fine angular adjustments. Minimum angular movements of 3 and 1.5 μrad are possible with the Ø1" (KS1D) and Ø2" (KS2D) options, respectively (see Table and Footnote c below).

Item #	Optic Diameter	Minimum Optic Thickness	Angular Adjustment	Number of Adjusters	Type of Adjusters	Thread	Resolution*
KS05(/M)	1/2" (12.0 mm)	0.12" (3.0 mm)	±4^o	3	Hex Socket	3/16"-100	9.1 mrad/rev
KS1	1" (25.0 mm)	0.16" (4.0 mm)	±4^o	3	Removable Knobs	1/4"-80	7.4 mrad/rev
KS2	2" (50.0 mm)	0.20" (5.0 mm)	±4^o	3	Removable Knobs	1/4"-80	4.8 mrad/rev
KS3	3" (75.0 mm)	0.28" (7.1 mm)	±4^o	2	Removable Knobs	1/4"-80	5.0 mrad/rev
KS4	4" (100.0 mm)	0.28" (7.1 mm)	±4^o	2	Removable Knobs	1/4"-80	3.9 mrad/rev
KS1D	1" (25.0 mm)	0.16" (4.0 mm)	±4^o	3	Removable Knobs	1/4"-80 / M3-0.40 / M3-0.375	660 μrad/rev
KS2D	2" (50.0 mm)	0.20" (5.0 mm)	±4^o	3	Removable Knobs	1/4"-80 / M3-0.40 / M3-0.375	400 μrad/rev

*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).

Click to Enlarge

Differential Adjuster

The KS1D and KS2D come with two differential adjusters and one conventional adjuster. The differential adjuster is adjusted using the removable hex wrench. The total angular adjustment using the conventional adjusters is ±4^o for both the KS1D and KS2D. The angular adjustment using only the differential adjusters are ±1.5^o and ±0.9^o for the KS1D and KS2D, respectively.

The KS1D and KS2D use two DAS110 differential adjusters, which offer 318 μm of coarse and 25 μm of fine differential movement. A schematic of the differential mechanism is shown below.

Coarse Adjustment
Knob "A" is permanently fastened to the 1/4"-80 externally threaded main body "B" and provides the coarse angular adjustment of the kinematic mount. The coarse adjuster is standard on all KS series mounts (KS05 features 3/16"-100 threaded main body), including the translation adjuster on the KS1D and KS2D.

Fine Adjustment (DAS110)
Main body "B" is also internally threaded with an M3-0.40 thread, this thread holds the intermediate actuator "C", which may be rotated by a hex wrench. The key to the design is that 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 M3-0.40 mm thread internal to the main body. When the intermediate actuator is rotated clockwise, it moves out of the main body by 400μm per revolution. Connected to the internal thread of "C" is the push rod "D", the push rod mates to "C" via an M3-0.375 thread and is restricted from rotating by the main body. Now as "C" is rotated it advances at the rate of 400 μm/rev, but 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: 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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