K9 High-Precision Single-Surface Optical Flat front product view on a dark background
Angled view of K9 High-Precision Single-Surface Optical Flat for interferometry, surface testing and optical metrology

SO-FL01 SERIES

K9 High-Precision Single-Surface Optical Flat

SO-FL01 K9 High-Precision Single-Surface Optical Flat provides a polished reference surface for checking flatness by optical interference while the opposite face is relieved from precision-contact duty.

$100.88
$100.88

Select a Model

Product Overview

Specify K9 High-Precision Single-Surface Optical Flat by aperture, surface accuracy and mounting

The model table keeps each available grade separate because aperture, thickness, surface accuracy and parallelism directly change how the reference optic performs.

Choose diameter, thickness and flatness grade for the test aperture; support the non-reference face without loading the polished reference surface.

Select a Model

models

Engineering Guidance

Choose the window around transmitted wavefront and environment

Performance considerations

The model table keeps each available grade separate because aperture, thickness, surface accuracy and parallelism directly change how the reference optic performs.

Selection and mounting

Choose diameter, thickness and flatness grade for the test aperture; support the non-reference face without loading the polished reference surface.

Need a different diameter, tolerance or coating?

Custom substrate materials, dimensions, angular tolerances and coating bands can be reviewed for prototype and production quantities.

Request Engineering Review

Technical Resources

Related engineering articles

Selection notes and practical guidance matched to this product family.

CANAL GLASS SHOP
TECHNICAL RESOURCE
Optical Fundamentals · 7 min

How Optical Windows Protect a System Without Adding Optical Power

Understand how a plane-parallel window protects an optical path while controlling wavefront and beam deviation.
CANAL GLASS SHOP
TECHNICAL RESOURCE
Material Selection · 6 min

Choosing K9, Fused Silica or Sapphire for Optical Windows

Compare spectral range, thermal stability, hardness and cost for common optical-window substrates.
CANAL GLASS SHOP
TECHNICAL RESOURCE
Selection Guide · 8 min

Reading Flatness, Parallelism and Surface Quality

Connect window tolerances to transmitted wavefront, wedge, scattering and mechanical integration.