Mini-Series Post-Mountable Accessories


Post-Mountable Accessories

  • Mount Directly onto Mini-Series Posts
  • Small, Compact, Space-Saving Design

Thorlabs' mini-series post-mountable accessories are designed to be compatible with our mini-series posts. Our slip-on collars attach to mini-series posts and, when used with a mini-series post holder, restrict the height adjustment of the post. These collars are ideally used when swapping post-mounted components such as lenses so that the lens' height will be aligned to the optical axis of your system.

Our lever-actuated, continuously variable iris diaphragm is designed to provide smooth operation over many thousands of cycles. The individual steel leaves pivot within a black-anodized aluminum housing. Our mini-series variable iris is mounted on a Ø6 mm stainless steel post that is compatible with our Mini-Series line.


Mini-Series Post Collar


  • Compatible with Our Mini-Series Posts
  • Double-Bore Profile for Stability

The MSR2 Ø6 mm slip-on post collar is a mini version of our popular R2 Ø1/2" post collar. It features a double-bore profile to provide a stable two-line contact and a non-marring brass setscrew to ensure secure locking. Height adjustment is restricted while providing rotational freedom.


Mini-Series, Post-Mounted Iris Diaphragms


  • Lever-Actuated, Continuously Variable Iris
  • Black Spring Steel Leaves
  • Black-Anodized Aluminum Housing
  • Mounted on Ø6 mm, 1.5" (38 mm) Long Post

This product is designed to be compatible with our Mini-Series Posts components and is optimal for applications in which space is limited. The Mini-Series product line offers all of the essential building blocks for miniature and OEM-level optomechanical assemblies.

Item #Aperture# LeavesO.D./Thickness
ID5MS (ID5MS/M) Ø1.0 to Ø5 mm 6 0.44" / 0.19" (11.2 mm / 4.8 mm)


Our Mission is to accelerate the advancement of optical technology for precision measurements and their applications from the table tops of research laboratories to standard use in communication and high technology industries. Our aim is to serve our customers. Our hope is to create a place for highly skilled people in an open environment

contact us

Tel               +966 35823441
Fax               +966 35823441
Egypt Mobile  +2 0120 7577664
KSA Mobile     +966 545 991188
Email             This email address is being protected from spambots. You need JavaScript enabled to view it.