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Kinematic Mounts for 30 mm Cage Systems


  • Precision Angular Adjustment of Optics
  • Ideal for Retroreflection Mirror or Collimation Lens
  • 30 mm Cage System Compatible

KC1-S

SM1 (1.035"-40) Tap in Front Slip Plate

KC1-T

SM1 (1.035"-40)
Tap in Front Plate

Application Idea

KC1-S Retroreflector Cage (Components Sold Separately)

Related Items


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Kinematic Rotation Mount
Click to Enlarge
This 30 mm cage-compatible kinematic rotation mount consists of a CRM05 rotation mount threaded into a KC1-T cage-compatible kinematic mount.
Alternative Size Options
16 mm Kinematic Cage Mounts
30 mm Kinematic Cage Mounts
30 mm Right-Angle Kinematic Cage Mounts
60 mm Kinematic Cage Mounts
Kinematic Rotation Mount
Click to Enlarge
Our KC1-PZ Smooth Bore
Kinematic Mount with Piezo-Driven Adjusters

Features

  • Ø1" (Ø25.4 mm) Optic Mount
  • Compatible with 30 mm Cage System
  • 8-32 (M4) Tapped Hole for Post Mounting

Thorlabs offers five 30 mm-cage-compatible kinematic mounts that are designed for easy integration into our cage assembly system. They are ideal for holding retroreflecting mirrors or collimated light sources, enabling precise angular alignment of a beam along the axis of a 30 mm cage system. In addition to mounts with manual adjusters, we also offer versions of our K1C and K1C-T with piezo-driven adjusters. Accurate center axis alignment with the 30 mm cage system is made easier using one of the cage system alignment plates offered at the bottom of this page.

The Cage Assembly System provides a convenient way to construct large optomechanical systems with an established line of precision-machined building blocks designed for high flexibility and accurate alignment. Our mounts featured here have been designed to allow for the precise angular positioning of optics within a cage system. Thorlabs offers
16 mm, 30 mm, and 60 mm cage systems designed for Ø1/2", Ø1", and Ø2" optical components, respectively. The parts on this page are compatible with our 30 mm cage system and utilize Ø6 mm ER cage rods.

Cage System Overview

The Cage Assembly System provides a convenient way to construct large optomechanical systems with an established line of precision-machined building blocks designed for high flexibility and accurate alignment.

16 mm, 30 mm, and 60 mm Cage System Standards

Thorlabs offers three standards defined by the center-to-center spacing of the cage assembly rods (see image below). The 16 mm cage, 30 mm cage, and 60 mm cage standards are designed to accomodate Ø1/2", Ø1", and Ø2" optics, respectively. Specialized cage plates that allow smaller optics to be directly inserted into our larger cage systems are also available.

Standard Threads

The flexibility of our Cage Assembly System stems from well-defined mounting and thread standards designed to directly interface with a wide range of specialized products. The three most prevalent thread standards are our SM05 Series (0.535"-40 thread), SM1 Series (1.035"-40 thread), and SM2 Series (2.035"-40 thread), all of which were defined to house the industry's most common optic sizes. Essential building blocks, such as our popular lens tubes, directly interface to these standards.


An example of the standard cage plate measurements determining cage system compatibility.
Standard Cage System Measurements
Cage System 16 mm 30 mm 60 mm
Thread Series SM05 SM1 SM2
Rod to Rod Spacing 16 mm (0.63") 30 mm (1.18") 60 mm (2.36")
Total Length 25 mm (0.98") 41 mm (1.60") 71.1 mm (2.8")
Cage Components
Cage Rods 16 mm These rods are used to connect cage plates, optic mounts, and other components in the cage system. The SR Series Cage Rods are compatible with our 16 mm cage systems, while the 30 mm and 60 mm cage systems use ER Series Cage Rods.
30 mm
60 mm
Cage Plates 16 mm These serve as the basic building blocks for a cage system. They may have SM-threaded central bores, smooth bores sized for industry standard optics or to accommodate the outer profile of our SM Series Lens Tubes, or specialized bores for other components such as our FiberPorts.
30 mm
60 mm
Optic Mounts 16 mm Thorlabs offers fixed, kinematic, rotation, and translation mounts specifically designed for our Cage Systems.
30 mm
60 mm
Cage Cubes 16 mm These cubes are useful for housing larger optical components, such as prisms or mirrors, or optics that need to sit at an angle to the beam path, such as beamsplitters. Our cage cubes are available empty or with pre-mounted optics.
30 mm
60 mm
Post and Breadboard Mounts and Adapters Mounting options for cage systems can be found on our Cage System Construction pages. Cage Systems can be mounted either parallel or perpendicular to the table surface.
Size Adapters Cage System Size Adapters can be used to integrate components from different cage system and threading standards.
Specialized Components Thorlabs also produces specialized cage components, such as Filter Wheels, a HeNe Laser Mount, and a FiberPort Cage Plate Adapter, allowing a wide range of our products to be integrated into cage-mounted optical systems. Explore our Cage Systems Visual Navigation Guide to see the full range of Thorlabs' cage components.

Posted Comments:
a.webber-date  (posted 2018-02-19 15:27:47.243)
It would be nice to have one of these with an independent front plate, i.e. one that doesn't have the cage move as you do the tip/tilt. I know you make the cage holes larger to compensate for this but the whole thing is just hard to use.
llamb  (posted 2018-03-04 04:05:13.0)
Thank you for contacting Thorlabs and for your feedback. I will add this idea to our internal product forum so that hopefully we can offer these with an independent front plate in the future.
jlow  (posted 2012-08-13 11:37:00.0)
Response from Jeremy at Thorlabs: The diameter on the back of the KC1-T/M is Ø1.32". It is designed such that a SM1 lens tube can be attached to the front plate (from the back) without the back plate interfering.
kr  (posted 2012-08-13 10:37:23.0)
What is the diameter of the hole in the back plate of the KC1-T/M? The front hole (threaded) is dimensioned in the drawing but not the hole in the back plate (it is actually not shown). In the step file it looks quite large. Thanks. Keith
tcohen  (posted 2012-03-07 14:24:00.0)
Response from Tim at Thorlabs: Thank you for your feedback. To adjust your spacing, the KC1-T is able to slide along cage rods to a desired position. It can then be fixed into place with setscrews and the three adjusters will allow another 3mm of linear translation.
ZWJIORO  (posted 2012-03-07 03:26:45.0)
Dear Thorlabs, I would like to mount a collimating lens in the KC1-T.I want to konw ,Is it possible to use the KC1-T to adjust the spacing between the LD and the collimating lens to collimate the light from the LD in the cage system?
jjurado  (posted 2011-06-20 19:50:00.0)
Response from Javier at Thorlabs to zsolt.kis1: Thank you very much for contacting us. You can certainly mount your 6 mm thick mirror onto the KC1.The nylon-tipped setscrew will provide sufficient support for mounting this optic.
zsolt.kis1  (posted 2011-06-20 11:16:47.0)
Dear Thorlabs, I would like to mount a 6mm thick mirror in the KC1 mount. Is it possible to do it with the nylon-tipped locking screw? Best regards, Zsolt Kis Customer Email: zsolt.kis1@gmail.com This customer would like to be contacted.
jens  (posted 2010-03-29 17:41:04.0)
A reply from Jens at Thorlabs: the spring stiffness is optimized in order to allow a stable mounting of the plate while still providing the possibility for smooth manual adjustment which does not require too much force. Nevertheless we can certainly offer a custom version with stiffer springs for your particular application. We would be happy to discuss the specific requirements with you.
user  (posted 2010-03-29 09:10:41.0)
Received a KC1-T recently. Ill have to rebuild the unit with springs that are strong enough to hold the faceplate on. As it stands, it is simply too easy to deflect the faceplate.

30 mm-Cage-Compatible Smooth Bore Kinematic Mount

  • ±5º Tip / Tilt, ±3 mm Linear Translation Along the Optical Axis
  • Accepts Ø1" (25.4 mm) Optics
  • Minimum Optic Thickness: 0.12" (3 mm)
  • Compatible with 30 mm Cage System
  • 8-32 (M4) Tapped Hole for Post Mounting

The KC1 Kinematic Mount is designed with a smooth, double-bored mounting hole that can accommodate a Ø1" optic that is at least 0.12” (3 mm) thick; the optic is held in place with a top-located, nylon-tipped locking screw. This kinematic mount comes with three 1/4-80 adjusters that offer an adjustment per revolution of 7 mrad/rev. In addition, each adjuster has independently locking setscrews.

Both the front and rear plates have been machined with four clearance holes designed for direct compatibility with our 30 mm cage system standard. The cage rod holes in the front plate are sufficiently oversized to allow ±4º tip and tilt adjustment without cage rod interference. Once the desired position is achieved, locking setscrews on the rear plate can be used to secure the rods in place. In addition to 30 mm cage compatibility, the KC1 is post mountable via an 8-32 (M4) tapped hole.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
KC1 Support Documentation
KC1Kinematic 30 mm-Cage-Compatible Mount for Ø1" Optic
$96.40
Today
+1 Qty Docs Part Number - Metric Price Available
KC1/M Support Documentation
KC1/MKinematic 30 mm-Cage-Compatible Mount for Ø1" Optic, Metric
$96.40
Today

30 mm-Cage-Compatible SM1-Threaded Kinematic Mount

  • ±5º Tip / Tilt, ±3 mm Linear Translation Along the Optical Axis
  • Accepts Ø1" (25.4 mm) Optics
  • Maximum Optic Thickness: 0.23" (5.8 mm)
  • Compatible with 30 mm Cage System
  • 8-32 (M4) Tapped Hole for Post Mounting

The KC1-T Kinematic Mount is designed with an SM1-threaded (1.035"-40) mounting hole that can directly hold optics up to 5.8 mm (0.23”) thick using the two included SM1RR Retaining Rings. Thicker optics can be accommodated by housing the optic in one of our SM1-Series Lens Tubes and then threading the lens tube into the front plate of the mount. Alternatively, since the back plate of the KC1-T features an oversized Ø1.32" bore, SM1 lens tubes can also be attached to the front plate from the rear of the mount without sacrificing angular adjustment. This threaded, kinematic mount comes with three adjusters with independently locking setscrews.

Both the front and rear plates have been machined with four clearance holes designed for direct compatibility with our 30 mm cage system standard. The cage rod holes in the front plate are sufficiently oversized to allow ±4º tip and tilt adjustment without cage rod interference. Once the desired position is achieved, locking setscrews on the rear plate can be used to secure the rods in place. In addition to 30 mm cage compatibility, the KC1-T is post mountable via an 8-32 (M4) tapped hole.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
KC1-T Support Documentation
KC1-TKinematic, SM1-Threaded, 30 mm-Cage-Compatible Mount for Ø1" Optic
$97.45
Today
+1 Qty Docs Part Number - Metric Price Available
KC1-T/M Support Documentation
KC1-T/MKinematic, SM1-Threaded, 30 mm-Cage-Compatible Mount for Ø1" Optic, Metric
$97.45
Today

30 mm-Cage-Compatible Kinematic Mounts with Piezo-Driven Adjusters

Click to Enlarge
KC1-P Optic Mount
  • Smooth Bore or SM1-Threaded Versions Available
  • Manual and Piezo Adjusters in Series
  • Accepts Ø1" (Ø25.4 mm) Optics
  • Compatible with 30 mm Cage Systems
  • 8-32 (M4) Taps for Post Mounting

These kinematic mirror mounts incorporate piezo-driven fine adjustment into our KC1 and KC1-T mirror mounts (available above). Each of the three adjustable axes consists of a manual and piezo adjuster in series. The smooth bore versions secure the mirror with a nylon-tipped 8-32 (M4) setscrew, while the SM1-threaded versions secure the mirror with two included SM1RR Retaining Rings. The KC1-PZ(/M) and KC1-T-PZ(/M) offer a piezo linear travel of ±4 µm and minimum step size of 0.3 µrad, while the KC1-P(/M) and KC1T-P(/M) offer a piezo linear travel of ±9.7 µm with minimum step size of 0.37 µrad per 0.1 V step.

The piezo adjusters connect to a controller using the included 3' (91.4 cm) cables, and the maximum control voltage is 150 V. The KC1-PZ(/M) and KC1-T-PZ(/M) mounts include permanently attached BNC cables, while the KC1-P(/M) and KC1T-P(/M) include detachable cables. The KC1-PZ(/M) and KC1-T-PZ(/M) mounts are also sold bundled with the MDT693B Three-Channel Piezo Controller, providing all the components needed for open-loop control of the mount. 

These mounts are 30 mm cage system compatible; the cage rods can be locked into place using their locking screws. They are also post mountable using one of the three 8-32 (M4) mounting taps.

Item # KC1-PZ(/M) KC1-P(/M) KC1-T-PZ(/M) KC1T-P(/M)
Mechanical Specifications
Optic Size Ø1" (Ø25.4 mm)
Acceptable Optic Thickness Min: 0.12" (3.0 mm) Max: 0.12" (3.0 mm)
Clear Aperture Ø0.94" Ø0.90"
Mounting Hole Smooth Bore SM1 (1.035"-40) Threaded
Mechanical Angular Range ±5° (±87 mrad)
Mechanical Linear Travel ±3 mm
Adjusters 80 TPI Screws w/ Piezos 100 TPI Screws w/ Piezos 80 TPI Screws w/ Piezos 100 TPI Screws w/ Piezos
Post Mounting Features 8-32 (M4) Mounting Taps
Cage System Compatablity Bores for 30 mm Cage Rods
0.05" (1.3 mm) Hex Locking Screws
Bores for 30 mm Cage Rods
5/64" (2 mm) Hex Locking Screws
Bores for 30 mm Cage Rods
0.05" (1.3 mm) Hex Locking Screws
Bores for 30 mm Cage Rods
5/64" (2 mm) Hex Locking Screws
Piezo Specifications
Integrated Piezo Item # AE0505D08Fa POLARIS-P20 AE0505D08Fa POLARIS-P20
Resonant Frequency 138 kHz 69 kHz 138 kHz 69 kHz
Piezo Angular Range ±73 µrad ±275 µrad ±73 µrad ±275 µrad
Piezo Linear Travel ±4 µm ±9.7 µm ±4 µm ±9.7 µm
Minimum Step Size 0.3 µrad 0.37 µrad per 0.1 V Step 0.3 µrad 0.37 µrad per 0.1 V Step
Piezo Control Voltage 0 to 150 V
Piezo Connectors Integrated BNC Cables
(Click for Cable Diagram)
Male SMB
(Three Detachable PAA236R 
SMB-to-BNC Cables Included)
Integrated BNC Cables
(Click for Cable Diagram)
Male SMB
(Three Detachable PAA236R
SMB-to-BNC Cables Included)
  • This previous generation item is not available for individual purchase.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
KC1-PZ Support Documentation
KC1-PZØ1" Piezoelectric Optic Mount, ±4 µm Travel, Smooth Bore, 8-32 Taps
$668.18
Today
KC1-P Support Documentation
KC1-PØ1" Piezoelectric Optic Mount, ±9.7 µm Travel, Smooth Bore, 8-32 Taps
$865.20
Today
KC1-T-PZ Support Documentation
KC1-T-PZØ1" Piezoelectric Optic Mount, ±4 µm Travel, SM1 Threaded, 8-32 Taps
$669.23
Today
KC1T-P Support Documentation
KC1T-PØ1" Piezoelectric Optic Mount, ±9.7 µm Travel, SM1 Threaded, 8-32 Taps
$875.50
Today
+1 Qty Docs Part Number - Metric Price Available
KC1-PZ/M Support Documentation
KC1-PZ/MØ1" Piezoelectric Optic Mount, ±4 µm Travel, Smooth Bore, M4 Taps
$668.18
Today
KC1-P/M Support Documentation
KC1-P/MØ1" Piezoelectric Optic Mount, ±9.7 µm Travel, Smooth Bore, M4 Taps
$865.20
Today
KC1-T-PZ/M Support Documentation
KC1-T-PZ/MØ1" Piezoelectric Optic Mount, ±4 µm Travel, SM1 Threaded, M4 Taps
$669.23
Today
KC1T-P/M Support Documentation
KC1T-P/MØ1" Piezoelectric Optic Mount, ±9.7 µm Travel, SM1 Threaded, M4 Taps
$875.50
Today

30 mm-Cage-Compatible SM1-Threaded Kinematic Mount with Slip Plate

Specifications
Angular Drivers 1/4"-80 TPI Adjustersa
XY Travel ±1.0 mm (±0.04") per Axis
with Lockable Slip Plate
Angular Resolution 0.4°/rev
Angular Displacement ±4°
Z Travel ±3.0 mm (±0.12")
Inner Slip Plate
XY Travel
±0.04" (1 mm) per Axis
Optic Thickness (Max) 0.23" (5.8 mm)
Optic Mounting Internal SM1 (1.035"-40) Thread
Post Mounting 8-32 (M4) Tapped Hole
  • Can be Locked Using the Provided Setscrew and 0.035" Hex Key
  • Slip Plate Provides ±1 mm of Coarse X and Y Adjustment
  • ±4º Tip / Tilt, ±3 mm Linear Translation Along the Optical Axis
  • Accepts Ø1" Optics
  • Maximum Optic Thickness: 0.23" (5.8 mm)
  • Compatible with Our 30 mm Cage Systems
  • 8-32 (M4) Tapped Hole for Post Mounting

The KC1-S Kinematic Mount is designed with a SM1 (1.035"-40) threaded mounting hole with a front slip plate that enables direct mounting of optics up to 5.8 mm (0.23”) thick using the included SM1RR Retaining Rings. Thicker optics can be accommodated by housing the optic in one of our SM1-Series Lens Tubes and then threading the lens tube into the front plate of the mount. Alternatively, since the back plate of the KC1-S features an oversized Ø1.32" bore, SM1 lens tubes can also be attached to the front plate from the rear of the mount without sacrificing angular adjustment. This threaded, kinematic mount comes with three adjusters with independently locking setscrews.

Both the front and rear plates have been machined with four clearance holes designed for direct compatibility with our 30 mm cage system standard. The cage rod holes in the front plate are sufficiently oversized to allow ±4° tip and tilt adjustment without cage rod interference. Once the desired position is achieved, locking setscrews on the rear plate can be used to secure the rods in place. In addition to 30 mm cage compatibility, the KC1-S is post mountable via an 8-32 (M4) tapped hole.

The KC1-S slip plate feature incorporated into this mount provides ±1 mm of coarse travel in X and Y with respect to the front plate, which enables additional freedom when setting an optic's position within a cage system. Three locking screws allow the user to lock the slip plate down once the desired location has been reached. The user should note, however, that loosening the locking screws may result in excessive coarse movement (slop) in the slip plate. For best performance, tighten the locking screws, and then release them only enough to allow for smooth operation of the slip plate.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
KC1-S Support Documentation
KC1-SKinematic, SM1-Threaded, 30 mm-Cage-Compatible Mount with Slip Plate for Ø1" Optic
$170.20
Today
+1 Qty Docs Part Number - Metric Price Available
KC1-S/M Support Documentation
KC1-S/MKinematic, SM1-Threaded, 30 mm-Cage-Compatible Mount with Slip Plate for Ø1" Optic, Metric
$170.20
Today

Alignment Plates for 30 mm Cage Systems

VRC4CPT
Back View of VRC4CPT
  • Quick, Drop-In Beam Alignment Tool
  • Small Through Hole Aligned at Center of 30 mm Cage Assembly

The CPA1 and CPA2 Alignment Plates are convenient tools for aligning cage-based optical systems. These drop-in plates feature a small through hole at the exact center of the 30 mm cage assembly that is used for aligning visible beams. For easy alignment, the through hole is surrounded by engraved rings, which indicate Ø4 mm, Ø7 mm, Ø10 mm, and Ø13 mm. The CPA1 provides a Ø0.9 mm through hole, while the CPA2 provides a Ø5 mm through hole.

The VRC4CPT and VRC6SCPT Alignment Plates are specifically designed to align IR or MIR beams in a cage-based optical assembly. Both plates are identical to the CPA1 (shown to the left) on the front. The back (shown to the right) of the VRC4CPT includes a Ø1/2" (Ø12.7 mm), non-rotating IR-sensitive fluorescing alignment disk made of the same material used in our VRC4 Viewing Card. Alternatively, the back of the VRC6SCPT includes a Ø0.39" (Ø10.0 mm), non-rotating MIR alignment disk is made of the same thermochromic liquid crystal material used in our VRC6S Viewing Card, which reacts to laser sources over the 1.5 to 13.2 µm wavelength range, and has a minimum detectable power density of 0.05 mW/mm2 at 1550 nm (22 °C). The VRC4CPT plate has a Ø1.5 mm hole centered on the plate's Ø0.9 mm hole, and the VRC6SCPT has a Ø2.0 mm hole centered on the plate's Ø0.9 mm hole. 

Item # Wavelength Range Emission Band Minimum Detectable Power Density Active Region Diameter Alignment Features
VRC4CPT 790 - 840 nm,
870 - 1070 nm,
1500 - 1590 nm
~520 to 580 nm N/A 1/2" (12.7 mm) Ø0.9 mm Hole in Plate
Ø1.5 mm Hole in Disk Center
VRC6SCPT 1.5 to >13.2 µm N/A 0.05 mW/mm2 @ 1550 nm (22 °C)  0.39" (10.0 mm) Ø0.9 mm Hole in Plate
Ø2.0 mm Hole in Disk Center
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
CPA1 Support Documentation
CPA130 mm Cage System Alignment Plate with Ø0.9 mm Hole
$13.13
Today
CPA2 Support Documentation
CPA230 mm Cage System Alignment Plate with Ø5 mm Hole
$13.13
Today
VRC4CPT Support Documentation
VRC4CPT30 mm Cage System Alignment Plate with IR Disk (790 - 840 nm, 870 - 1070 nm, 1500 - 1590 nm)
$31.79
Today
VRC6SCPT Support Documentation
VRC6SCPT30 mm Cage System Alignment Plate with MIR Disk, 1.5 to >13.2 µm
$37.08
Today
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