Zygo

4" Transmission Sphere F/0.75 --1/40 Wave Ultra Sphere

4" Transmission Sphere F/0.75 --1/40 Wave Ultra Sphere - Main image
4" Transmission Sphere F/0.75 --1/40 Wave Ultra Sphere - View 2
$28.53 $40.75 In stock

Category: Accessories

The ZYGO 4" Transmission Sphere F/0.75 is an Ultra Sphere accessory specified at 1/40 wave (15.8 nm) PVr. It is listed under Accessories and carries the ZYGO brand.

  • Product: 4" Transmission Sphere
  • F/0.75 aperture designation
  • Ultra Sphere type
  • Specified at 1/40 wave (15.8 nm) PVr
  • Brand: ZYGO
  • SKU: 6024-0444-15 (Standard)
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Customer Reviews (4.8 / 5 · 5 reviews)

Benjamin ★★★★★

This F/0.75 sphere cleaned up the fringes on my 6-inch test part immediately—the 1/40 wave accuracy is exactly what I needed for final polishing verification.

Steven S. ★★★★★

The 1/40 wave PVr spec is no joke—my interferometer readings were clean and repeatable right out of the box. The F/0.75 aperture covers my 4-inch setup easily, and it feels solidly built for the price point.

Ellie L. ★★★★★

Interferogram fringes stayed dead straight across the full 4-inch aperture, and the 1/40 wave PVr spec held up exactly as stated when I checked it on our test bench. The F/0.75 speed is brutal for alignment, but once set, the wavefront stayed stable even after an hour of warm-up.

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