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Kinematic Mounts for 60 mm Cage Systems


  • Compatible with 60 mm Cage Systems
  • Mount 2" (50.8 mm) Circular or Elliptical Optics
  • Post Mountable

Anti-Drift
Locking Collar

KCB2

Tapped Cage Rod Holes

KCB2C

Smooth Cage Rod Bores

KCB2EC

Right-Angle Mount for Elliptical Mirrors

KC2

Ø2" (Ø50.8 mm) Smooth 
Bore in Front Plate

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Features

  • Kinematic Mounts for 2" (50.8 mm) Circular and Elliptical Optics
  • Compatible with 60 mm Cage System

Thorlabs' Kinematic Mounts for 60 mm Cage Systems are designed to allow the functions of a kinematic optic mount to be easily integrated into our 60 mm Cage System. These mounts are designed for use with 2" (50.8 mm) optics, including both round and elliptical mirrors. The KC2 and KC2-T are designed to mount round optics on the optical axis of a cage system, while the KCB2(/M), KCB2C(/M), and KCB2EC(/M) are designed to mount optics at a 45° angle. The KCB2(/M) is equipped with tapped holes to accommodate ER Cage Rods. By contrast, the KCB2C(/M) and KCB2EC(/M) are equipped with smooth bore holes for cage rods, which are secured by setscrews using a 5/64" (2 mm) hex key or balldriver.

Cage System Compatibility: Thorlabs' cage 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. Thorlabs offers 16 mm, 30 mm, and 60 mm cage systems designed for Ø1/2", Ø1", and Ø2" optical components, respectively. See the “Cage Overview” tab for a full definition of this widely adapted construction standard. The parts on this page are compatible with our 60 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. All locking setscrews used in these cage plates are standard 4-40 setscrews, which use a 0.05" hex key.

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.

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Posted Comments:
Poster:ericb
Posted Date:2017-05-23 12:42:34.083
Hi, I just ordered two of these to be connected, via cage rods, to a cube LC6W. I noticed that when the cage rods screwed into the cube, and then put into the pockets of this mount they do not quite make an even inch distance. In fact the rod ends at the surface, but does not go into the hole. I expect that I will have to machine off a longer cage rod to make it work. However, if you have an easier solution to this, I'm all ears. Thanks, Eric
Poster:nbayconich
Posted Date:2017-06-08 05:13:56.0
Thank you for contacting Thorlabs. I will reach out to you directly about your application.
Poster:hobbs
Posted Date:2015-05-07 12:12:36.573
One important dimension is missing--what's the axial distance from flange to flange for light bouncing off the centre of the mirror? Looks like about 75 mm, but an exact distance would be helpful in assembling systems.
Poster:cdaly
Posted Date:2015-05-11 08:44:55.0
Response from Chris at Thorlabs: With the beam traveling along the central axis of the 60mm cage on each side of the KCB2, the mirror would be positioned in such a way that the optical path length through the cube would be 3"(76.2mm).

60 mm Cage Kinematic Mirror Mounts

  • Mounts Ø2" (Ø50.8 mm) Optics on the Optical Axis
  • Through Holes for ER Cage Rods
  • Provides ±3° Kinematic Tip and Tilt Adjustment
  • KC2 Secures Optics with a Nylon-Tipped Setscrew
  • KC2-T is SM2-Threaded (2.035"-40) and Includes 2 SM2RR Retaining Rings
  • Post Mountable: Three 8-32 (M4) Tapped Holes

Our KC2(/M) and KC2-T(/M) Mounts provide kinematic tip and tilt adjustment of a Ø2" (Ø50.8 mm) optic. The KC2(/M) includes a nylon-tipped setscrew to secure optics using a 5/64" (2 mm) hex key or balldriver. In contrast, the KC2-T(/M) is SM2-threaded and includes two SM2RR retaining rings to secure optics. Each mount has four through holes compatible with our ER Cage Rods and includes four setscrews to lock them into place using a 0.050" hex key or balldriver. The ±3° kinematic tip and tilt adjustment is actuated with three 100 TPI (Threads Per Inch) adjustment screws for smooth, high-resolution movement. These adjusters feature a locking collar design and removable knobs.

The KC2(/M) is designed for thicker optics (0.12" minimum thickness), while the KC2-T(/M) is capable of mounting thin optics (not exceeding 0.2" thick).

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available / Ships
KC2 Support Documentation
KC2Customer Inspired!Locking Kinematic Mirror Mount For Ø2" Optics, 8-32 Taps
$193.00
Today
KC2-T Support Documentation
KC2-TCustomer Inspired!Locking SM2-Threaded Kinematic Mirror Mount for Ø2" Optics, 8-32 Taps
$199.00
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
KC2/M Support Documentation
KC2/MCustomer Inspired!Locking Kinematic Mirror Mount for Ø2" Optics, M4 Taps
$193.00
Today
KC2-T/M Support Documentation
KC2-T/MCustomer Inspired!Locking SM2-Threaded Kinematic Mirror Mount for Ø2" Optics, M4 Taps
$199.00
Today

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

  • Mounts Ø2" (Ø50.8 mm) Optics at a 45° Angle to the Optical Axis
  • Eight 4-40 Tapped Holes for ER Cage Rods
  • Provides ±4º Kinematic Tip and Tilt Adjustment
  • 60 mm Cage System and SM2 (2.035"-40) Compatible
  • Post Mountable:
    • KCB2: One 8-32 Tap and One 1/4"-20 Tap (for Ø1/2" and Ø1" Posts)
    • KCB2/M: One M4 Tap and One M6 Tap (for Ø1/2" and Ø1" Posts)

The KCB2(/M) Right-Angle Kinematic Cage Mount provides kinematic tip and tilt adjustment of a Ø2" (Ø50.8 mm) optic held in a mounting plate with a mean horizontal position at a 45° angle. The ports are equipped with SM2-threaded (2.035"-40) bores. The KCB2(/M) has eight 4-40 tapped holes spaced to mate with our 60 mm cage systems. ERSCA ER Rod Adapters are necessary to effectively connect, adjust, and lock two of these right angle cage mounts together within the cage system. The ±4° kinematic tip and tilt adjustment plate is actuated with three 100 TPI (Threads per Inch) adjustment screws for smooth, high-resolution movement. 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 Ø2" (Ø50.8 mm) optics using a 5/64" (2 mm) hex key or balldriver via the mounts' rear-loading, double-bored hole. The rear loading design does not limit the maximum 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 0.24" (6 mm).

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available / Ships
KCB2 Support Documentation
KCB2Right-Angle Kinematic Mirror Mount with Tapped Cage Rod Holes, 60 mm Cage System and SM2 Compatible, 8-32 and 1/4"-20 Mounting Holes
$164.00
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
KCB2/M Support Documentation
KCB2/MRight-Angle Kinematic Mirror Mount with Tapped Cage Rod Holes, 60 mm Cage System and SM2 Compatible, M4 and M6 Mounting Holes
$164.00
3-5 Days

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

Kinematic Right-Angle Mount
Click to Enlarge

KCB2C Mount with an Attached SM2L20 Lens Tube. The Mount Holds a BB2-E02 Broadband Dielectric Mirror.
  • Mounts Ø2" (Ø50.8 mm) Optics at a 45° Angle to the Optical Axis
  • Eight Smooth Bore Holes for ER Cage Rods
  • Provides ±4º Kinematic Tip and Tilt Adjustment
  • 60 mm Cage System and SM2 (2.035"-40) Compatible
  • Post Mountable:
    • KCB2C: One 8-32 Tap and One 1/4"-20 Tap (for Ø1/2" and Ø1" Posts)
    • KCB2C/M: One M4 Tap and One M6 Tap (for Ø1/2" and Ø1" Posts)

The KCB2C(/M) Right-Angle Kinematic Cage Mount provides kinematic tip and tilt adjustment of a Ø2" (Ø50.8 mm) optic held in a mounting plate with a mean horizontal position at a 45° angle. The ports are equipped with SM2-threaded (2.035"-40) bores and smooth bore holes spaced to mate with our 60 mm cage system standard. The cage rods are secured by setscrews using a 5/64" (2 mm) hex key or balldriver. This design allows multiple 60 mm cage components to be directly interfaced without the need for ERSCA ER Rod Adapters. The ±4° kinematic tip and tilt adjustment plate is actuated with three 100 TPI (Threads per Inch) adjustment screws for smooth, high-resolution movement. 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 Ø2" (Ø50.8 mm) optics using a 5/64" (2 mm) hex key or balldriver via the mounts' rear-loading, double-bored hole. When used with transmissive optics, two clearance cuts around this hole provide a Ø1.26" (Ø32.0 mm) nominal clear aperture for any transmitted light. The rear loading design does not limit the maximum 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 0.24" (6 mm).

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available / Ships
KCB2C Support Documentation
KCB2CCustomer Inspired!Right-Angle Kinematic Mirror Mount with Smooth Cage Rod Bores, 60 mm Cage System and SM2 Compatible, 8-32 and 1/4"-20 Mounting Holes
$164.00
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
KCB2C/M Support Documentation
KCB2C/MCustomer Inspired!Right-Angle Kinematic Mirror Mount with Smooth Cage Rod Bores, 60 mm Cage System and SM2 Compatible, M4 and M6 Mounting Holes
$164.00
3-5 Days

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

Elliptical Mirror Mount
Click to Enlarge

The mirror is locked in place by a swing arm and nylon-tipped setscrew. The adjuster knobs feature side holes for fine adjustments.
  • Mounts 2" (50.8 mm) Elliptical Optics at a 45° Angle to the Optical Axis
  • Eight 0.25" (6.35 mm) Deep Smooth Bore Holes for ER Cage Rods
  • Provides ±3º Kinematic Pitch and Yaw Adjustment
  • Z-Axis Translation Using All Three Adjusters: ±0.12" (±3.0 mm)
  • 60 mm Cage System and SM2 (2.035"-40) Compatible
  • Post Mountable:
    • KCB2EC: One 8-32 Tap and One 1/4"-20 Tap (for Ø1/2" and Ø1" Posts)
    • KCB2EC/M: One M4 Tap and One M6 Tap (for Ø1/2" and Ø25.0 mm Posts)

The KCB2EC(/M) Right-Angle Kinematic Cage Mount provides kinematic pitch and yaw adjustment of a 2" (50.8 mm) elliptical optic held in a mounting plate with a nominal horizontal position at a 45° angle. The ports are equipped with SM2-threaded (2.035"-40) bores and four 0.25" (6.35 mm) deep smooth bore holes spaced to mate with our 60 mm cage system standard.

The ±3° kinematic pitch and yaw adjustment plate is actuated with three 100 TPI (threads per inch) adjustment screws that provide angular resolution of 4.5 mrad/rev. The pitch and yaw adjusters include removable knobs with Ø5/64" (Ø2 mm) side holes for fine adjustments, while the third adjuster 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 setscrew mounted on a swing arm is used to secure 2" (50.8 mm) elliptical optics using a 5/64" (2 mm) hex key or balldriver via the mount's rear-loading, double-bored hole. Note that the setscrew should only be finger tight to avoid distorting the optic. Please note that this mount is compatible only with 2" elliptical optics that are 0.47" (12 mm) thick. Our selection of dielectric and metallic elliptical mirrors are compatible with this mount.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available / Ships
KCB2EC Support Documentation
KCB2ECRight-Angle Kinematic Elliptical Mirror Mount with Smooth Cage Rod Bores, 60 mm Cage System and SM2 Compatible, 8-32 and 1/4"-20 Mounting Holes
$230.00
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
KCB2EC/M Support Documentation
KCB2EC/MRight-Angle Kinematic Elliptical Mirror Mount with Smooth Cage Rod Bores, 60 mm Cage System and SM2 Compatible, M4 and M6 Mounting Holes
$230.00
Today
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