Zygo

Reference Flat 90% reflective

Reference Flat 90% reflective - Main image
Reference Flat 90% reflective - View 2
$670457.76 $906024 In stock

Category: Accessories

The ZYGO Reference Flat is a 4-inch optical reference flat specified with 90% reflectivity and 1/20 wave surface accuracy. It is offered under SKU 6024-0309-11 in the Standard configuration.

  • Brand: ZYGO
  • Category: Accessories
  • Size: 4 inches
  • Reflectivity: 90%
  • Surface accuracy: 1/20 wave
  • SKU: 6024-0309-11 (Standard)
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Customer Reviews (4.8 / 5 · 5 reviews)

Zoe ★★★★★

The 1/20 wave surface accuracy is immediately obvious in the fringe pattern—dead straight lines with zero distortion. Took me less than ten minutes to validate my interferometer setup, and the 90% reflectivity gives a crisp, high-contrast return. Exactly what I needed for calibration work.

Ellie M. ★★★★★

Interferometry setup was a breeze with this 4-inch flat—the 90% reflectivity gave me clean fringes right out of the box. Measured surface error came in right at the 1/20 wave spec, which is exactly what my calibration needed.

Ryan ★★★★★

The surface accuracy on this one checked out at 1/20 wave on my interferometer, which is exactly what I needed for a collimation setup. It's held up well over a few weeks of handling, and the 4-inch size sits nicely on my bench without taking over.

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