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FiberBench Optic Mounts & Wall Plates
EO Modulator Attached to an
Ø1/2" Lens Tube Mount
Tip/Tilt and Rotation Mount for 5 mm Beamsplitter Cubes
30 mm Cage System Mount
Thorlabs offers several component modules that can be used to mount numerous precision optical components. These modules can then be easily integrated into a FiberBench system, and position optics at a consistent beam height of 0.56" (14.2 mm). In each case, the module is designed with two steel dowel pins on its underside that fit into the receiving holes on the FiberBench. Once inserted, the design of the mount ensures that the optic will be at the appropriate height for use within the fiber-optic system.
FiberBench Components Featured Below:
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The FBR has a Rotation Lock Screw (0.050" Hex) and Engraved Scale with 2° Increments
The FBR is a FiberBench-compatible rotation mount for Ø1/2" (Ø12.7 mm) optics with a Ø0.45" (Ø11.4 mm) clear aperture. It is SM05-threaded (0.535"-40) for mounting optics, Ø1/2" lens tubes, and other SM05-threaded components. This mount is ideal for holding our Ø1/2" polarizers and wave plates (when removed from their Ø1" mounting cell). The mount's rotating cell has a knurled edge and 360° laser-engraved scale marked at 2° increments for precise, repeatable positioning and fine angular adjustment. A convenient top-located setscrew (0.050" Hex) secures the rotational position of the stage.
The FBS05 lens tube mount can hold Ø1/2" lens tubes at a beam height of 0.56" (14.2 mm) and enables the incorporation of Ø1/2" optical elements into the FiberBench system. A Ø1/2" lens tube can slip into the FBS05 and then be locked in place with the nylon-tipped 8-32 setscrew located at the top of the mount. The two dowel pins on the mount easily fit into the receiving holes on any of our Single-Axis or Multi-Axis FiberBenches.
The FT-SM05 optics mount is designed to hold Ø1/2" optics (ND filters, diffusers, colored filters, and the VRC2D05 alignment disk) while maintaining the appropriate beam height when placed on a FiberBench. It features our standard SM05 thread (0.535"-40).
a. This specification is true for relatively flat lenses. For lenses with small focal lengths, and hence large lens curvatures, please contact Tech Support to ensure a proper fit.
Kinematic FiberBench Mount Features
These tip/tilt rotation FiberBench mounts are designed to mount either 5 mm cube optics, such as polarizing or non-polarizing beamsplitter cubes, (Item # FBTC) or 1 mm thick plate optics up to 12.7 mm (0.5") wide, such as beamsplitters or mirrors, (Item # FBTP) while maintaining the appropriate beam height. Both versions require epoxy to mount optical components. The circular rotation plate can be rotated a full 360° and is engraved with a scale marked every 5°. Additionally, a Vernier scale provides 1° resolution for fine rotation. These mounts do not suffer from left/right handedness restrictions, and thus can be used in any orientation on a FiberBench.
An engraved dot is present on the FBTP Plate Optic Mount between the 0° and 90° engravings. Beamsplitter optics should be installed with the beamsplitter coating facing this dot. This allows an incident beam to be aligned so that it is split at the center of the mount.
These mounts allow for tip, tilt, and rotational adjustment for precision beam alignment and steering control. Three screws control the tip/tilt of the mount (see Figure 1), yielding up to ±3° of adjustment. Additionally, these screws can also provide some vertical adjustment when all three screws are rotated by the same amount. A physical stop prevents the tip/tilt springs from being overextended. When engaged, the fine rotation adjustment screw (see Figure 1) gives up to ±12° adjustment. All adjustment screws use a 0.05" hex key, which is included with these mounts. Furthermore, they can be locked into position (see Figure 2) with a spanner wrench to prevent accidental movement. The necessary spanner wrench (SPW403) is included; simply insert the included hex key through the spanner wrench, and while holding the adjustment screw static, use the spanner wrench to tighten the locking nut (see Figure 3).
Additional locking collars and spanner wrenches are also available for purchase separately. If desired, two locking collars can be used together to create a hard stop (see Figure 4). Alternatively, a single collar can be epoxied to an adjuster using our G14250 epoxy to create a permanent hard stop.
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Figure 1: These are the adjuster locations on the FBTC mount. The FBTP has its adjustment screws in the same locations.
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Figure 2: A single locking collar can lock an adjuster in position.
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Figure 3: Use the included hex key and spanner wrench to lock an adjustment screw in place.
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Figure 4: Two collars can be locked together to create a hard stop.
This mount secures our Free-Space Isolators with an outer diameter of 0.865" to our FiberBench series, aligning the optical axis with the isolator. The mount is compatible with all of our FiberBenches.
The HCB Static Mounting Base allows a user-supplied optic to be secured to the top surface with epoxy and then inserted at the correct height into a FiberBench setup. Once inserted into the receiving holes of the FiberBench , the distance from the top surface of the platform to the point at which the source beam will strike the optic is approximately 1.5 mm. The figure to the right shows Thorlabs' PBB Polarizer attached to the HCB base.
The FT-EOMA is a mounting bracket used to mount an Electro-Optic (EO) Modulator onto a FiberBench. The length of the bench needs to be at least 70 mm in the direction you wish to mount the modulator. Incorporation of the optional EO Modulator optic mount and polarizer (EO-GTH5M) will require a longer FiberBench. The Linear Polarizer modules are well suited for use with an EO Modulator in a FiberBench System. The application picture to the right shows an EO Modulator with an FT-38X100 Multi-Axis FiberBench, one PCB Linear Polarizer, and two PAF FiberPorts.
The UCB Universal Component Base is designed to secure a square optic, while maintaining the appropriate beam height, for use in a FiberBench system. Optics up to 15 mm thick can be secured into place using two nylon thumbscrews.
These Wall Plates can be attached to the sides of a FiberBench using the two included 8-32 mounting screws. The HCA3 and HCA3-SM1 are used to mount FiberPorts to FiberBenches using the four included 2-56 screws (see photo to the right). The HCA3-SM1 is internally SM1 (1.035"-40) threaded for compatibility with our Ø1" Lens Tubes and other SM1-threaded devices such as Thorlabs' Photodetectors. Each wall plate includes screws for mounting to our FiberBenches and the SM-threaded wall plates each include one retaining ring.
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The HCA3-CP is used to combine a FiberBench and a 30 mm Cage System for a power sampling application. The beamsplitter picks off some of the incoming light and sends it through a polarizer to a detector, allowing the polarization state of light entering the fiber to be monitored.
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The HCA3-CP FiberBench Adapter Plate accepts cage rods for 16 mm and 30 mm Cage Systems.
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Click to Enlarge FiberPort, HCA3-SM05 Wall Plate, 16 mm Cage System, and Ø1/2" Lens Tube
These Wall Plates allow FiberBenches to be combined with Thorlabs' Cage Systems. They can be attached to the sides of a FiberBench using the two included 8-32 mounting screws. The HCA3-SM05 features four 4-40 taps and is internally SM05- threaded (0.535"-40) for compatibility with our 16 mm Cage System and Ø1/2" Lens Tubes, respectively (see photo to the right).
The HCA3-CP can accept cage rods for 30 mm and 16 mm cage systems either simultaneously or separately. Three #8 counterbores on the bottom of the plate allow it to be mounted to one of Thorlabs' FiberBenches. The plate accepts Ø4 mm or Ø6 mm cage rods for 16 mm or 30 mm cage systems, respectively. The Ø4 mm cage rods are held in place for by locking screws that accept a 0.05" (1.3 mm) hex key. The Ø6 mm cage rods are secured using a flexure mechanism that can be tightened by a single locking screw on each side of the mount that accepts 5/64" (2.0 mm) hex keys. The port through the center is SM05-threaded, allowing it to accept lens tubes or other threaded optical components.
When combining a FiberBench with a cage system, make sure that the FiberBench is properly supported to avoid applying excess torque to the cage rods. If the cage system is low enough, the FiberBench can rest directly on the optical table. For segments of the cage system that are elevated off of the optical table, the FiberBench can be supported using a Ø1" optical post threaded into the 8-32 or M4 tap in the base.
Each wall plate includes screws for mounting to our FiberBenches. The HCA3-SM05 ships with one SM05RR retaining ring to aid in securing SM05-threaded components, while the HCA3-CP ships with two retaining SM05RR rings to secure unmounted optics up to 0.21" (5.3 mm) thick, such as Thorlabs' Premium Hard-Coated Bandpass Filters.
The FT-MMAC is ideal for mounting mirror mounts (or any 8-32 threaded mount) to the side of our FiberBenches. The FT-MMAC comes with all the screws necessary to mount it to the bench (two 8-32 shoulder screws) and to the mirror mount (one 8-32 and one M4). The FT-MMAC can be used to mount our KS05 (as shown in the picture to the right), a KM05, KMS, or KMSS mirror mount. Additionally, users can mount one of our VH1 V-clamps with this versatile adapter.
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Two FiberBench FBR-LPVIS Rotating Linear Polarizer Modules Secured by CPFB Mounts in a 30 mm Cage System
This 30 mm Cage System Mount for FiberBench Components allows integration of our line of FiberBench Components with our 30 mm cage system. It includes two through holes that fit the dowel pins on our FiberBench optic mounts. Once the dowels have been inserted, they can be locked in position using a 0.035" balldriver or hex key to tighten the setscrew on the front face of the mount.
The mount includes two snap-in flexure clamps for attaching our Ø6 mm cage rods, which can be locked with a 5/64" (2.0 mm) hex key. This snap-in feature allows components to be easily inserted and removed without disassembling the entire cage system. When this mount is used in a cage system that is attached to a FiberBench with the HCA3-CP cage plate, the beam height for all optical components is the same. An 8-32 (M4) tapped hole on the bottom of the CPFB mount can be used to secure it to a Ø1/2" post. Please note that this cage system mount cannot be used with FiberBench optic mounts that are more than 0.75" (19.1 mm) wide in the direction perpendicular to the optical axis.
Thorlabs' FBA (/M) FiberBench Adapter Mounts can be used to secure compatible FiberBench accessories to Ø1/2" Posts. The FBA can be mounted to a Ø1/2" post via the 8-32 (M4) tapped hole that goes through the center of the adapter. This freedom to mount individual pieces to a post gives the user the option of using the compact FiberBench accessories for free space applications.
The adapter is designed to be compatible with FiberBench accessories that have two steel dowel pins on their underside. These pins fit into the receiving holes on the adapter, and the 2-56 setscrew on the side of the adapter can be used to lock the FiberBench accessory in position.