5"+ Transmission Spheres for 4" Fizeau interferometers

Key τFRIN features:

• Two-component aplanatic design: Transmission Sphere + Adapter
• Common Adapter for 6 replaceable TS Objectives of different F/#, fast replacement
• Optimized for optical shop testing
• Wide range of F/# from 1:7 to 1:0.65
• Adapter with 4" bayonet, "state‐of‐the‐art" design, can be customized
• Compatibility with widely used 4" interferometers
• Accuracy of reference surfaces λ/15
• λ = 633 nm, versions for 532 nm, 1064 nm and other wavelengths available by request
• Internal expansion of 4" input beam extends ranges of radii and diameters of surfaces under test
• Suitability for horizontal and vertical test measurement schemes
• Convenient colour marking

Common Adapter
for 6 replaceable τFRIN Objectives

(the photo on the right shows the Adapter and five Objectives)