GCL-13 Uncoated K9 Parallel Optical Flat

The source explicitly identifies GCL-13 as an uncoated K9 parallel optical flat. Its card statesφ50.0,D20,and the product title describes diameter50 and thickness20,without units. These descriptions preserve the original material designation and dimensional meanings rather than substituting another glass grade or supplying millimeters,clear aperture or a precision class. English artwork follows the thick circular-disc appearance in the source photography. Blue-purple photographic color does not change the explicit uncoated configuration. Exact flatness,parallelism,wedge,surface quality and test wavelength require independent documentation. Selection should also account for mechanical clamping and actual supplied configuration;the category name is not a complete optical inspection specification.

Model,diameter and thickness

GCL-13 is the sole online model. The card statesφ50.0,D20,and the product title explicitly identifies diameter50 and thickness20. Those meanings are retained,but no units are provided. Millimeters and clear aperture are not assumed. Dimensional tolerances and the thickness reference are absent;model digits do not supply other parameters.

K9 and uncoated configuration

The source explicitly identifies an uncoated K9 parallel optical flat. K9 is retained as the source material designation rather than automatically replaced by another glass grade. Uncoated is an explicit configuration. The blue-purple face and pink edge in photography do not establish an antireflection or reflective coating. Confirm material grade,batch information and spectra.

Surface quality and parallelism

Parallel optical flat is a category description without numerical flatness,parallelism,wedge,surface quality or measurement accuracy. The source provides no test wavelength,inspection method or certificate. A wavelength-fraction precision grade,interferometric accuracy or zero-wedge guarantee is not added. Reflectance,transmission,operating band and laser damage conditions are also unspecified.

Appearance,selection and delivery

Photography shows one thick round disc. It does not replace a dimension drawing or establish clear aperture,chamfers,mounting interfaces or substrate homogeneity. The source custom-size offer does not establish additional stocked SKUs. Confirm units,test grade,clamping requirements,cleaning,accessories and quantity. The source lists2–7 days for dispatch;check current stock and actual delivery.

Selection checklist

Complete model,K9 and uncoated configuration

Diameter/thickness units,clear aperture and tolerances

Flatness,parallelism,surface quality and inspection

Clamping,cleaning,quantity,accessories and delivery

To be confirmed

Dimension units,clear aperture,thickness reference and tolerances

K9 material grade,homogeneity and batch data

Flatness,parallelism,wedge,surface quality and test wavelength

Spectra,damage conditions,mounting,accessories and delivery