Relief Cut Clamp Design

The C series of Ø1" (Ø25 mm) post clamps feature a precision bored Ø1" (Ø25 mm) hole with a relief cut. A clamping screw is used to squeeze the gap created by the relief cut, which in turn secures the clamp to the Ø1" (Ø25 mm) post with a great deal of force. The mounting features are summarized in the table below.

C-Clamp Design

The RM series of Ø1" (Ø25 mm) post clamps feature a C-clamp design that allows them to be slipped on and off of a Ø1" (Ø25 mm) post. The clamp is secured using a non-marring brass tipped setscrew. The clamps come in a variety of styles, each with different mounting features, which are summarized in the table below.

Imperial

Metric

Item #	Style	Tapped Hole for Mounting	Through Hole for Mounting	Rotating, Threaded Mounting Stud	Cage System Clamp Size
RM1A	C-Clamp	8-32	8-32
RM1B	C-Clamp	1/4"-20	1/4"-20
RM1C	C-Clamp			8-32
RM1D	C-Clamp with Variable Height Offset		#8
C1026	Relief Cut Clamp				30 mm
C1060	Relief Cut Clamp				60 mm
RA90RS	Right-Angle Flexure Clamp		Ø1/2"
RM1A/M	C-Clamp	M4	M4
RM1B/M	C-Clamp	M6	M6
RM1C/M	C-Clamp			M4
RM1D/M	C-Clamp with Variable Height Offset		M4
C1026/M	Relief Cut Clamp				30 mm
C1060/M	Relief Cut Clamp				60 mm
RA90RS/M	Right-Angle Flexure Clamp		Ø12.7 mm

For alternative thread types, consider using a thread adapter or consider a solution based on Ø1.5", Ø1/2", or Ø6 mm posts.

Mounting Joists

Thorlab's Mounting Joists provide even more space-saving options. The compact joist can be used to mount multiple optical elements close together, which alleviates the need for multiple posts and posts holders. These versatile joists can also offset a post from the mounted optic in order to squeeze the optic into tight areas. The two joist designs provide adaptable laboratory solutions to crowded table problems.

This construction is the basis for a simple fluorescence imaging system, however additional components should be added depending on the applicaiton.

Flexible Optomechanical Components Make Simple and System Level Construction Easy

Thorlabs' selection of optomechanical parts makes it possible to easily construct entire optical systems. The Ø1" diameter post clamps featured on this page provide an excellent way to support simple single element constructions like the RM1C variable offset C-clamp being used to mount a KM100B kinematic platform with a prism to complex systems like the imaging application shown below, which demonstrates the compatibility and breadth of the Thorlabs' product line.

Starting at the fiber patch cord, the light is collimated using a FiberPort, which has an aspheric lens element that can be translated and rotated with µm level precision. The FiberPort is integrated into the 30 mm cage system (parallel steel rod structure) providing the backbone to this imaging application using the CP08FP cage plate. The next component is a kinematic turning mirror mount with a broadband dielectric mirror. Not shown in the image are the alignment tools that make iteasy to precisely align the beam path to the optical axis of the cage system. The long span of the cage system is supported by the C1026 clamp featured on this page and terminated with a cube mounted beamsplitter. Since both the turning mirror mount and the beamsplitter cube have threaded holes for the cage system rods, ERSCA adapters can be seen where the rods attach to the beamspliiter cube. The beamsplitter directs the laser down to the XY motorized translation stage (specialized microscopy stages are available) and passes the fluorescence signal being detected up to the photodiode detector. The detector is mounted on a lens tube attached to the beamsplitter cube. (Most cage system components are also lens tube compatible.) The lens tube contains a lens, filter, and ring actuated iris.

The entire setup was built on a Thorlabs' optical breadboard. In addition, elements like the fiber coupled laser source and controllers for the motorized stages are not present in the picture.

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Ø1" (Ø25 mm) Post Clamp Accessories

Relief Cut Clamp Design

C-Clamp Design

Mounting Joists

Flexible Optomechanical Components Make Simple and System Level Construction Easy