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  • 74-90-UV Free Space Optics
  • 74-90-UV Free Space Optics
  • 74-90-UV Free Space Optics

74-90-UV Collimating Lens Assembly

Part Number: 74-90-UV

Lead Time: 1 week

Total Price

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Product Details

Ocean Insight 74-90-UVs are 3/8-24 threaded black anodized aluminum assemblies for mounting lenses at 90°. Versions are available for coupling to a pair of optical fibers or to an optical fiber on one end and a cosine corrector on the other.

Each 74-90-UV has a mirror under its cap that reflects light from the collimating lens to 90°. The mirror is coated with an aluminum substrate that is >80% reflective from 200-1000 nm. A pair of 3/8-24 threaded ports accommodate collimating lenses (not included). 

Product Overview

  • Versatile – rugged assembly for mounting lenses at 90°
  • Reflective design – mirror assembly is >80% reflective from 200-1000 nm
  • Fiber optic – can be used with two fibers or with a fiber and a cosine corrector
  • Flexible – allows routing of optical fibers without concern for transmission loss


Select model to see full specifications


Lens Material:
f/2 fused silica Dynasil
Wavelength Range:
200nm - 2μm
Connector Threads:
"3/8-24 (ports) 9.525 mm x 25.4 mm (nipple)"
Cosine Corrector:
Yes (Spectralon diffusing material)
5 mm
Dimensions (OD):
16.5 x 16.5 x 19.9
Focal Length Specification:
10 mm
Mirror Coating:
UV-enhanced aluminum
Mirror Reflectivity:
>80% from 200-1000 nm
11.3 g