SIGMAKOKI Optical Flat 100mm Surface Flatness λ/12　HMPZP-100C17-12

Feature

• It is a substrate made by polishing with high precision a material whose shape changes very little due to temperature change.
• It can be used for the original interferometer and the original Newton.
• Optical flats are attached with interferometric surface accuracy inspection data.
• You can select the necessary optical flat from among the variations which are subdivided by size and various surface accuracy.
• Large optical flats with high surface accuracy use materials with lower thermal expansion than synthetic quartz.
• The face indicated by the side arrow is a highly polished face.
• Optical flats are delivered in a storage case.
• Xerodua (R) is a registered trademark of SCHOTT AG.
• CLEARCERAM (R) is a registered trademark of O'Hara Co., Ltd.
• Wedge boards (WSB/WSSQ/WSSQK) are also available to prevent backside reflections.
• Newtonian rings are rainbow-colored stripes formed when an optical flat is brought into close contact with a specimen. The shape and number of these stripes can be used to infer the surface shape of the specimen.
• * When used as a Newton master, the sample may be damaged due to contact with the master.
• * Use a laser interferometer or the like to inspect items that cannot be scratched.
• * The number of fringes in the Newton ring is about twice the PV value of the interferometer analysis result.
• * Optical flats are not coated to maintain surface accuracy.
• * The surface accuracy of the optical flat may deteriorate if there are cracks or scratches on the edges.
• * If there are cracks or mold, please replace it with a new one.

Specifications

• [ common specification]
• Material: Synthetic quartz, Low expansion glass (0 dual(R) or CLEARCERAM(R) - Z)
• Parallelism: ＜3′
• Scratch - dig: 20?10
• Back: Polished surface
• Effective diameter: 95% of outer diameter
• [Individual specification]
• Outer diameter φD: φ100mm
• Thickness t: 17mm
• Material: Low expansion glass
• Reflective wavefront accuracy PV: λ/12
• RoHS conform product