SM05-Compatible Kinematic Mounts

SM05 Threading: 0.535"-40
Mount 1/2" (12.7 mm) Circular or Elliptical Optics
Mount Ø1/2" Lens Tubes

K6X05

6-Axis
Kinematic Mount

KC05-T

Kinematic Mount for 16 mm Cage Systems, 3 Adjusters

KM05T

Kinematic Mount for
Thin Ø1/2" Optics,
2 Adjusters

Application Idea

KCB05 Mount for Round Ø1/2" Optics

KCB05E

16 mm Cage Right‑Angle Kinematic Mount

KS05RS

Ø1/2" Kinematic Rotation Mount

K5X05

5-Axis
Kinematic Mount

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Overview
Threading Specs
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Features

SM05-Threaded Kinematic Mounts with Fine Adjustment Actuators for Precise Positioning
Mount Ø1/2" (Ø12.7 mm) Round or 1/2" Elliptical Optics
Integrate SM05-Threaded Components, such as Lens Tubes, Irises and Adapters

These SM05 (0.535"-40) threaded kinematic mounts offer pitch and yaw movement and precise angular adjustment. All of these kinematic mounts allow for versatility and flexibility in optomechanical constructions due to compatibility with SM05-threaded lens tubes, irises, and adapters. The KC05-T(/M), KCB05(/M), KCB05C(/M), and KCB05E(/M) mounts are also 16 mm cage system compatible.

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Threading Specifications

The following is a general overview of screw threading. For more details regarding specifications and dimensions, please consult the Machinery's Handbook, available for purchase at many bookstores.

Features of a Thread
A thread consists of three repeating features: a crest, flank, and root (see drawing to the right). Except in special cases, threads have symmetrical sides inclined at equal angles when a vertical line is drawn through the center of a crest or root. The distance between corresponding points on adjacent threads is known as the pitch of the thread. The flank angle is defined as the angle the flank makes with a perpendicular ray drawn from the screw axis. Unless otherwise stated, threads have a flank angle of 30°, resulting in a total angle between flanks of 60°. Each feature is shown in the diagram to the right.

The major diameter is taken from the crests of a thread while the minor diameter is taken from the roots. For most screws, crests and roots do not terminate at a sharp point, so crest and root truncation values are included in the definitions of major and minor diameter. The pitch diameter is approximately halfway between the major and minor diameters.

Thread Form
A thread form is a set of rules that define the features' scale relative to one another. Common thread forms include the Unified Screw Thread Form, used in the United States of America and measured in imperial units, and the ISO Metric Screw Thread Form, used in many parts of the world and measured with the International System of Units. There are many thread forms in the Unified screw thread standard designated by either UN, which defines a flat root contour, or UNR, which defines a round root contour. These can be further described by appending more letters. For example, an extremely fine thread with a flat root contour is designated UNEF. Those forms which are not standardized by the Unified screw thread system are designated UNS.

Thread Series
Most screws are identified by their thread series. Thread series are denoted by the major diameter and density of threads. Unified threads specify density in threads per inch, while Metric threads specify the thread pitch. For example, in the Unified nomenclature, a 1/4"-20 cap screw has a 1/4" diameter barrel and the pitch is 20 threads per inch (TPI). In metric nomenclature, an M4 x 0.7 cap screw has a 4 mm barrel and the pitch is 1 thread per 0.7 mm. The term M4 x 0.7 is often shortened to just M4.

Unified Thread Class Tolerancing
Location	Loose	Optimal	Strict
Internal	1B	2B	3B
External	1A	2A	3A

Metric Thread Tolerance Positions
Location	Loose	Optimal	Strict
Internal	-	G	H
External	e or f	g	h

Metric Thread Tolerance Grades
Dimension	Location	Tolerance Grades^a
Minor Diameter	Internal	4, 5, 6, 7, 8
Major Diameter	External	4, 6, 8
Pitch Diameter	Internal	4, 5, 6, 7, 8
Pitch Diameter	External	3, 4, 5, 6, 7, 8, 9

The tolerance becomes looser as the grade increases. The underlined grades are used with normal lengths of thread engagement.

Thread Class
The tolerances and allowances on a thread series are given by a thread class. Unified thread classes are alphanumeric identifiers starting with a number from 1 through 3, where 1 is the loosest tolerance and 3 is the tightest, and either A for external threading or B for internal threading.

Metric threads have a slightly more complex tolerancing method that uses tolerancing grades, designated by a number 3 through 9; and tolerancing positions, which use letters e through h. Grades provide a measure of the tolerance itself: the smaller the number, the tighter the tolerance. Positions denote the distance of the tolerance from the pitch diameter. Uppercase positioning letters indicate internal threads while lowercase positioning letters indicate external threads.

Quoting from the Machinery's Handbook, 29th Edition, p. 1885: "To designate the tolerance class, the grade and position of the pitch diameter is shown first followed by that for the major diameter in the case of the external thread or that for the minor diameter in the case of the internal thread, thus 4g6g for an external thread and 5H6H for an internal thread. If the two grades and positions are identical, it is not necessary to repeat the symbols, thus 4g, alone, stands for 4g4g and 5H, alone, stands for 5H5H."

Thorlabs' SM Series Threads
Threading specifications for our SM threads, utilized in our lens tube and cage system components, are given below so that you can machine mating components to suit your application. Most SM series threads utilize a non-standard Unified thread form, indicated by the letters UNS, with a 30° flank angle and a thread class of 2A and 2B. The exception is our SM30 series thread, which is a Metric thread form with a 30° flank angle and a tolerance of 6H/6g. We also offer products with C-Mount and RMS threads, and the specifications for these threads are given below for reference. Please note that other manufacturers may have different tolerances for C-Mount and RMS threads. For other thread specifications that are not listed here, please contact Tech Support.

SM05 Threading: Ø1/2" Lens Tubes, 16 mm Cage Systems
External Thread, 0.535"-40.0 UNS-2A		Internal Thread, 0.535"-40.0 UNS-2B
Max Major Diameter	0.5340"	Min Major Diameter	0.5350"
Min Major Diameter	0.5289"	Min Pitch Diameter	0.5188"
Max Pitch Diameter	0.5178"	Max Pitch Diameter	0.5230"
Min Pitch Diameter	0.5146"	Min Minor Diameter (and 83.3% of Thread)	0.508"
Max Minor Diameter	0.5069"	Max Minor Diameter (and 64.9% of Thread)	0.514"

RMS Threading: Objective, Scan, and Tube Lenses
External Thread, 0.800"-36.0 UNS-2A		Internal Thread, 0.800"-36.0 UNS-2B
Max Major Diameter	0.7989"	Min Major Diameter	0.8000"
Min Major Diameter	0.7934"	Min Pitch Diameter	0.7820"
Max Pitch Diameter	0.7809"	Max Pitch Diameter	0.7866"
Min Pitch Diameter	0.7774"	Min Minor Diameter (and 83.3% of Thread)	0.770"
Max Minor Diameter	0.7688"	Max Minor Diameter (and 64.9% of Thread)	0.777"

C-Mount Threading: Machine Vision Lenses, CCD/CMOS Cameras
External Thread, 1.000"-32.0 UN-2A		Internal Thread, 1.000"-32.0 UN-2B
Max Major Diameter	0.9989"	Min Major Diameter	1.0000"
Min Major Diameter	0.9929"	Min Pitch Diameter	0.9797"
Max Pitch Diameter	0.9786"	Max Pitch Diameter	0.9846"
Min Pitch Diameter	0.9748"	Min Minor Diameter (and 83.3% of Thread)	0.966"
Max Minor Diameter	0.9651"	Max Minor Diameter (and 64.9% of Thread)	0.974"

SM1 Threading: Ø1" Lens Tubes, 30 mm Cage Systems
External Thread, 1.035"-40.0 UNS-2A		Internal Thread, 1.035"-40.0 UNS-2B
Max Major Diameter	1.0339"	Min Major Diameter	1.0350"
Min Major Diameter	1.0288"	Min Pitch Diameter	1.0188"
Max Pitch Diameter	1.0177"	Max Pitch Diameter	1.0234"
Min Pitch Diameter	1.0142"	Min Minor Diameter (and 83.3% of Thread)	1.008"
Max Minor Diameter	1.0068"	Max Minor Diameter (and 64.9% of Thread)	1.014"

SM30 Threading: Ø30 mm Lens Tubes
External Thread, M30.5 x 0.5 – 6H/6g		Internal Thread, M30.5 x 0.5 – 6H/6g
Max Major Diameter	30.480 mm	Min Major Diameter	30.500 mm
Min Major Diameter	30.371 mm	Min Pitch Diameter	30.175 mm
Max Pitch Diameter	30.155 mm	Max Pitch Diameter	30.302 mm
Min Pitch Diameter	30.059 mm	Min Minor Diameter (and 83.3% of Thread)	29.959 mm
Max Minor Diameter	29.938 mm	Max Minor Diameter (and 64.9% of Thread)	30.094 mm

SM1.5 Threading: Ø1.5" Lens Tubes
External Thread, 1.535"-40 UNS-2A		Internal Thread, 1.535"-40 UNS-2B
Max Major Diameter	1.5339"	Min Major Diameter	1.535"
Min Major Diameter	1.5288"	Min Pitch Diameter	1.5188"
Max Pitch Diameter	1.5177"	Max Pitch Diameter	1.5236"
Min Pitch Diameter	1.5140"	Min Minor Diameter (and 83.3% of Thread)	1.508"
Max Minor Diameter	1.5068"	Max Minor Diameter (and 64.9% of Thread)	1.514"

SM2 Threading: Ø2" Lens Tubes, 60 mm Cage Systems
External Thread, 2.035"-40.0 UNS-2A		Internal Thread, 2.035"-40.0 UNS-2B
Max Major Diameter	2.0338"	Min Major Diameter	2.0350"
Min Major Diameter	2.0287"	Min Pitch Diameter	2.0188"
Max Pitch Diameter	2.0176"	Max Pitch Diameter	2.0239"
Min Pitch Diameter	2.0137"	Min Minor Diameter (and 83.3% of Thread)	2.008"
Max Minor Diameter	2.0067"	Max Minor Diameter (and 64.9% of Thread)	2.014"

SM3 Threading: Ø3" Lens Tubes
External Thread, 3.035"-40.0 UNS-2A		Internal Thread, 3.035"-40.0 UNS-2B
Max Major Diameter	3.0337"	Min Major Diameter	3.0350"
Min Major Diameter	3.0286"	Min Pitch Diameter	3.0188"
Max Pitch Diameter	3.0175"	Max Pitch Diameter	3.0242"
Min Pitch Diameter	3.0133"	Min Minor Diameter (and 83.3% of Thread)	3.008"
Max Minor Diameter	3.0066"	Max Minor Diameter (and 64.9% of Thread)	3.014"

SM4 Threading: Ø4" Lens Tubes
External Thread, 4.035"-40 UNS-2A		Internal Thread, 4.035"-40.0 UNS-2B
Max Major Diameter	4.0337"	Min Major Diameter	4.0350"
Min Major Diameter	4.0286"	Min Pitch Diameter	4.0188"
Max Pitch Diameter	4.0175"	Max Pitch Diameter	4.0245"
Min Pitch Diameter	4.0131"	Min Minor Diameter (and 83.3% of Thread)	4.008"
Max Minor Diameter	4.0066"	Max Minor Diameter (and 64.9% of Thread)	4.014"

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Kinematic Mount for Thin Ø1/2" Optics, 2 Adjusters

Kinematic Mount for Thin Ø1/2in Optics, 2 Adjusters

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Internally SM05-Threaded (0.535"-40) Optic Cell for Ø1/2" Lens Tube Compatibility
Ø1/2" Optics Held with Two SM05RR Retaining Rings (Included)
Mounts Thin Ø1/2" Optics up to 0.15" (4.0 mm) Thick
8-32 (M4) Tapped Holes Allow for Left-Handed or Right-Handed Orientation
Angular Range: ±4°
Two 3/16"-100 TPI Precision Adjusters Provide 13 mrad (0.75º) of Travel per Revolution

The KM05T(/M) mirror mount uses a retaining ring for stress-free mounting of a thin Ø1/2" or Ø12.0 mm optical component. The optic is secured in the SM05 (0.535"-40) threaded front plate using two SM05RR retaining rings (included). The maximum thickness of a mirror mounted in a KM05T(/M) is 0.15" (4.0 mm). The KM05T(/M) also offers two 8-32 (M4) taps for left- or right-handed mounting to our Ø1/2" Posts.

Kinematic Mount for Thin Ø1/2" Optics, 3 Adjusters

Kinematic Mount for Thin Ø1/2in Optics, 3 Adjusters

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A Ø1/2" Lens Tube Threaded into the KS05T

Internally SM05-Threaded (0.535"-40) Optic Cell for Ø1/2" Lens Tube Compatibility
Ø1/2" Optics Held with Two SM05RR Retaining Rings (Included)
Mounts Thin Ø1/2" Optics up to 0.15" (4.0 mm) Thick
8-32 (M4) Tapped Holes Allow for Left-Handed or Right-Handed Orientation
Angular Range: ±4°
Three Lockable 3/16"-100 Precision Adjusters Provide 9.1 mrad (0.52°) of Travel per Revolution

Our KS05T(/M) Threaded Precision Kinematic Mirror Mount is designed for use with either Ø1/2” or Ø12.0 mm optics and provide ±4° of pitch and yaw adjustment. The optic is held in place using two SM05RR retaining rings, which can be attached using an SPW603 or SPW603L Spanner Wrench, for low-stress mounting. 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 above and 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.

Ø1/2" Kinematic Rotation Mount

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KS05RS Shown with a PIAK10 Piezoelectric Inertia Actuator

Combines Kinematic Angular Adjustment with Rotation in One Mount
Three 1/4"-80 Lockable Stainless Steel Adjusters with Removable Knobs and Brass Bushings for Smooth Adjustments
Two #8 (M4) Counterbored Mounting Holes Allow Left-Handed or Right-Handed Orientations
SM05-Threaded (0.535"-40) Rotation Ring with Locking Screw Provides 360° Rotation
Engraved Rotation Scale with 2° Graduations

The KS05RS mount is designed to hold Ø1/2" (12.7 mm) optics in situations where it is necessary to control the tip/tilt position as well as the rotation of the optic. It is also capable of translation along the z-axis, which is accomplished by turning all three tip/tilt adjusters equally in the same direction. The included SM05RR retaining ring allows for mounting of optics up to 0.41'' (10.4 mm) thick. Additionally, SM05 (0.535"-40) lens tubes may be threaded onto the mount to accommodate thicker optics.

Thorlabs' Kinematic Rotation Mounts combine the features of our Precision Kinematic Mirror Mounts and Manual Rotation Mounts, providing continuous 360° rotational adjustment, ±4° kinematic tip/tilt adjustment, and 0.25'' (6.4 mm) of linear Z translation. These mounts are therefore ideal for holding optics with rotational asymmetry, such as polarization optics or round cylindrical lenses.

The rotation of the mount can be locked in position using the 4-40 locking screw (0.050" [1.3 mm] hex). Three 1/4"-80 adjusters with brass bushings provide smooth kinematic adjustment. Each adjuster may be locked with a locking screw using a 5/64" (2.0 mm) hex key. If higher adjustment resolution or control is desired, the 1/4"-80 adjusters used in this mount can be switched with DAS110 or DM22 Differential Adjusters.

Please note that while this mount is designed to hold Ø1/2" optics, the mount uses the same form factor as the KS1 Ø1" mirror mount in order to incorporate the rotation ring.

For more information on our kinematic rotation mounts, including versions for Ø1" and Ø2" optics, visit the complete web presentation.

5-Axis Kinematic Optic Mount

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Rear View of the K5X05 Kinematic Mount

Five Adjustment Axes with Three Lockable Axes
- Kinematic Pitch/Yaw: ±4° with 8 mrad/rev
- X and Y Translation: ±1.0 mm with 254 µm/rev
- Z Translation^a: ±0.18" (±4.6 mm) with 254 µm/rev
SM05-Threaded Bore for Ø1/2" (12.7 mm) Optics up to 0.33" (8.4 mm) Thick
Two #8 (M4) Counterbores for Post Mounting

The K5X05 5-Axis Kinematic Optic Mount has an optic cell that can be adjusted along 5 axes (pitch, yaw, and XYZ). The three adjusters that control tip, tilt, and z-axis translation each have a locking screw for stability. The translating cell has SM05 (0.535"-40) threading for attaching Ø1/2" mounted optics. The cell can also be used to mount Ø1/2" unmounted optics up to 0.33" (8.4 mm) thick using the included SM05RR Retaining Ring, which can be tightened using the SPW603 or SPW603L Spanner Wrench (sold separately). The mount features engraved vertical and horizontal tick marks to use as an alignment aid for the mounting cell. For post mounting the K5X05 kinematic mount in a right- or left-handed configuration, two orthogonal #8 (M4) counterbores are provided.

A 5/64" hex key or ball driver (not included) is used to adjust the 5 axes (3/16"-100 adjusters) of the K5X05 kinematic mount, as well as the three locking screws. The three adjusters that control tip, tilt, and z-axis translation also feature Ø0.07" side holes for adjustment in tight setups.

For more information on our 5-axis kinematic mounts, including a Ø1" version, see our full web presentation.

Z-axis translation is accomplished by turning all three tip/tilt adjusters equally in the same direction.

6-Axis Kinematic Optic Mount

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6-Axis kinematic mount usage. Note that while this animation shows the K6XS
mount for Ø1" optics, the operation of the K6X05 is analogous.

Six Adjustment Axes with Locks
- Kinematic Pitch/Yaw: ±4° with 4.2 mrad/rev
- X and Y Translation: ±1.5 mm with 254 µm/rev
- Z Translation^a: ±0.13" (±3.2 mm) with 318 µm/rev
- Continuous 360° Roll with Engraved 2° Graduations
Independent X, Y, and Roll Adjustment
SM05-Threaded Bore for Ø1/2" (12.7 mm) Optics up to 0.57" (14.4 mm) Thick
Two #8 (M4) Counterbores for Post Mounting

The K6X05 6-Axis Kinematic Optic Mount is designed as a general-purpose, high-precision positioner. The optic cell can be translated along or rotated about 6 axes, and each axis has a locking screw for stability. The translating cell has SM05 (0.535"-40) threading for attaching Ø1/2" lens tubes or mounting Ø1/2" (12.7 mm) optics up to 0.57" (14.4 mm) thick using the included SM05RR Retaining Ring, which can be tightened using an SPW603 or SPW603L Spanner Wrench (sold separately). In testing, the X and Y axes of the K6X05 caused less than ±35 µm of crosstalk.

If higher adjustment resolution is desired for pitch, yaw, or z-translation, the three 1/4"-80 adjusters can be replaced with DAS110 Differential Adjusters.

For more information on our 6-axis kinematic mounts, including versions for Ø1" and Ø2" optics, see our full web presentation.

Z-axis translation is accomplished by turning all three tip/tilt adjusters equally in the same direction.

Kinematic Mount for 16 mm Cage Systems, 3 Adjusters

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Internally SM05-Threaded (0.535"-40) Optic Cell for Ø1/2" Lens Tube Compatibility
Compatible with 16 mm Cage Systems
Ø1/2" Optics Held with Two SM05RR Retaining Rings (Included)
Mount Thin Ø1/2" (Ø12.7 mm) Optics up to 0.15" (3.8 mm) Thick
8-32 (M4) Tapped Holes Allow for Left-Handed or Right-Handed Orientation
Angular Range: ±2.5°
Three 3/16"-100 TPI Precision Adjusters

The KC05-T is a kinematic mirror mount designed for our 16 mm cage systems. Four SR series cage rods can be passed through the mount and locked into place using setscrews. Each kinematic mount features three 3/16"-100 fine adjustment screws, which have a 5/64" hex socket for adjustment. One 5/64" hex key is included with each mount. The KC05-T mount can hold optics up to 0.15" (3.8 mm) thick. The KC05-T includes two SM05RR retaining rings to secure optics within the mount.

16 mm Cage Right-Angle Kinematic Mirror Mount with Tapped Cage Rod Holes

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Eight 4-40 Tapped Holes to Mate with 16 mm Cage Systems
Mounts Ø1/2" (12.7 mm) Optics at a 45° Angle to the Optical Axis
Provides ±4º Kinematic Tip and Tilt Adjustment
Compatible with SM05-Threaded (0.535"-40) Lens Tubes
Post Mountable:
- KCB05: One 4-40 Tap and One 8-32 Tap (for Mini-Series and Ø1/2" Posts)
- KCB05/M: One M3 Tap and One M4 Tap (for Mini-Series, Ø1/2", and Ø1" Posts)

The KCB05(/M) Mirror Mount provides provides ±4° of kinematic tip and tilt adjustment for a Ø1/2" optic positioned at a mean angle of 45° to the optical axis. Entrance and exit ports are equipped with an SM05-threaded (0.535"-40) hole. The KCB05(/M) has eight 4-40 tapped holes spaced for compatibility with our 16 mm cage systems. SRSCA SR Rod Adapters are necessary to effectively connect, adjust, and lock two of these right angle cage mounts together within the cage system. The kinematic tip and tilt adjustment plate on these cubes is actuated with M3 x 0.25 adjustment screws that allow for smooth, high-resolution movement of 0.25 mm (0.01") per turn. Two of these adjusters include removable knobs, while the third must be tuned with a 5/64" (2 mm) hex key or balldriver.

A nylon-tipped setscrew is used to secure Ø1/2" (12.7 mm) optics using a 0.05" (1.3 mm) hex key or balldriver in the mount's rear-loading, double-bored hole. The rear loading design does not limit the thickness of the mounted optic and the mounted optic remains accessible even after the mount is fitted with cage rods or lens tubes. The minimum thickness for optics that can be secured by these mounts is 0.12" (3 mm).

16 mm Cage Right-Angle Kinematic Mirror Mount with Smooth Cage Rod Bores

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Eight Ø0.16" (Ø4.0 mm), 0.20" (5.0 mm) Deep Bores to Mate with 16 mm Cage Systems
Mounts Ø1/2" (12.7 mm) Optics at a 45° Angle to the Optical Axis
Provides ±4º Kinematic Tip and Tilt Adjustment
Compatible with SM05-Threaded (0.535"-40) Lens Tubes
Post Mountable:
- KCB05C: One 4-40 Tap and One 8-32 Tap (for Mini-Series, Ø1/2", and Ø1" Posts)
- KCB05C/M: One M3 Tap and One M4 Tap (for Mini-Series, Ø1/2", and Ø1" Posts)

The KCB05C(/M) Mirror Mount provides ±4° of kinematic tip and tilt adjustment for a Ø1/2" optic positioned at a mean angle of 45° to the optical axis. Entrance and exit ports are equipped with an SM05-threaded (0.535"-40) hole. Eight 0.20" (5.0 mm) deep bores, spaced for compatibility with our 16 mm Cage System, accept SR Cage Rods, which can be locked in place using the included 0.05" (1.3 mm) hex setscrews. This design allows multiple 16 mm cage components to be directly interfaced without the need for SRSCA SR Rod Adapters. The kinematic tip and tilt adjustment plate on these cubes is actuated with M3 x 0.25 adjustment screws that allow for smooth, high-resolution movement of 0.25 mm (0.01") per turn. Two of these adjusters include removable knobs, while the third must be tuned with a 1.5 mm hex key or balldriver.

A 0.05" (1.3 mm) hex, nylon-tipped setscrew is used to secure Ø1/2" (12.7 mm) optics in the mount's rear-loading, double-bored hole. Two clearance cuts, positioned on opposite sides of the optic bore, maximize the clear aperture for transmitted light and provide easy access to mounted optics. Due to the rear-loading design, the mounted optic remains accessible even after the mount is fitted with cage rods or lens tubes. The mount accepts optics ≥0.12" (3 mm) thick.

16 mm Cage Right-Angle Kinematic Elliptical Mirror Mount with Tapped Cage Rod Holes

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KCB05E Elliptical Mount with SR Cage Rods and an SM05 Lens Tube

Eight 4-40 Tapped Holes to Mate with 16 mm Cage Systems
Mounts 1/2" (12.7 mm) Elliptical Optics at a 45° Angle to the Optical Axis
Provides ±3º Kinematic Pitch and Yaw Adjustment
Z-Axis Translation Using All Three Adjusters: ±0.04" (±1.0 mm)
Compatible with SM05-Threaded (0.535"-40) Lens Tubes
Post Mountable:
- KCB05E: One 4-40 Tap and One 8-32 Tap (for Mini-Series and Ø1/2" Posts)
- KCB05E/M: One M3 Tap and One M4 Tap (for Mini-Series, Ø1/2", and Ø25.0 mm Posts)

The KCB05E(/M) Elliptical Mirror Mount provides ±4° of kinematic pitch and yaw adjustment for a 1/2" elliptical optic positioned at a mean angle of 45° to the optical axis. The ports are equipped with SM05-threaded (0.535"-40) bores and four 4-40 tapped holes center-to-center spaced for compatibility with our 16 mm cage systems. The kinematic pitch and yaw adjustment plate is actuated with M3 x 0.25 threaded adjustment screws that provide angular resolution of 12.94 mrad/rev. Two of these adjusters include removable knobs, while the third must be tuned with a 5/64" (2 mm) hex key or balldriver. While the optic face is nominally centered within the mount, the third adjuster can be used for fine tuning the position along the optical axis.

A nylon-tipped adjustment screw and a nylon-coated spring clip are used to secure 1/2" (12.7 mm) elliptical optics using a 0.05" (1.3 mm) hex key or balldriver via the mount's rear-loading, double-bored hole. The rear loading design does not limit the thickness of the mounted optic and the mounted optic remains accessible even after the mount is fitted with cage rods or lens tubes. We offer dielectric and metallic elliptical mirrors, which are compatible with this mount. The minimum thickness for optics that can be secured by these mounts is 0.12" (3 mm).