Description
158-122 Mitutoyo Optical Flat
The Mitutoyo 158-122 optical flat has the following specifications:
Flatness: .000004″
Diameter: 1.8″
Thickness: .500″
Features:
Available in Metric or Inch sets
Each set of parallels consists of 4 thicknesses
Constructed of highly polished, lapped optical-grade glass
Inspects the flatness of metal, ceramic and other materials
Supplied in a fitted wooden case
The Mitutoyo 158-122 optical flat is constructed of optical-grade glass and can measure the parallelism and flatness of a micrometer’s measuring face. When used with a monochromatic light, a Mitutoyo optical parallel can determine the measuring surface parallelism within 0.2µm/.000008” and flatness within 0.1µm/.000004” on micrometers. The Mitutoyo optical flats are precision polished and lapped for exceptional flatness in our Japanese factories.




