Spectrum Prismatic Lens Blocker

Spectrum Prism Lens Blocker

The Spectrum Prismatic Lens Blocker is the newest innovation in lens-blocking technology by Coburn. With a small footprint and thoughtful design, Spectrum automatically attaches the lens block to the lens at the correct prism angle, prism bases and axis of the blocking chuck.

Compatible with all common surfacing machines, the Spectrum Blocker precisely transports the lens to the chill ring, preventing the opportunity for lens marring or positioning errors. Spectrum also measures the front curve of the lens and warns the operator if the blank is incorrect, virtually eliminating blank selection errors. This measurement can be provided to the LMS for modification of back curve calculations to produce a more accurate lens.

Spectrum is available with multiple blocking ring configurations ranging from 50 mm to 63mm.

Also available in a plano (non-prismatic) version.


  • Automatically attaches the block at the
    correct prism angle, prism base, and axis
  • Enter job data manually or through LMS
  • Operator can align the next lens while current
    lens is cooling
  • Measure front curve of lens
  • Modify back curve calculations by LMS
  • Compatible with all common surfacing machines