Dual Surface Optical Flats, Φ203.2mm, Thickness=38.1±2mm, Uncoated, H-K9L Optical Glass, Parallelism: ＜5arcsec, United Optical Technology Co., Ltd (CAT#: STEM-OP-2980-YJL)

Dual Surface Optical Flats, Φ203.2mm, Thickness=38.1±2mm, Uncoated, H-K9L Optical Glass, Parallelism: ＜5arcsec, model 192505, is manufactured by United Optical Technology Co., Ltd.
The two optical surfaces of High Precision K9 Dual Surface Optical Flats have been precision ground and polished, and both upper and lower surfaces have high plane accuracy. At the same time, it has high parallelism, and any side can be used as a standard plane.
It is generally used as a standard plane to detect and identify the flatness error and grinding performance of other components' high-smooth surfaces. Each optical flat crystal is finely ground and tested using a Zygo interferometer to ensure surface accuracy.

Diameter: Φ203.2mm
Thickness: 38.1±2mm
Coating: Uncoated
Material: H-K9L Optical Glass
Surface Accuracy: λ/10@633nm
Parallelism: ＜5arcsec
Surface Quality: 40/20-60/40
Diameter Tolerance: ±0.2mm
Bevel: Protective Bevel 0.2~0.5mmX45°
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K9 optical glass is an optical material with excellent wide-spectrum transmission. It has high transmittance from 350nm to 2000nm, has high hardness, can withstand a variety of physical and chemical stimuli, and has low bubble and impurity content. Therefore, it is often used as the substrate for various optical elements to make various optical elements.

Dual Surface Optical Flats, Φ254.0mm, Thickness=38.1±2mm, Uncoated, H-K9L Optical Glass, Parallelism: ＜5arcsec, United Optical Technology Co., Ltd (CAT#: STEM-OP-2981-YJL)
Dual Surface Optical Flats, Φ304.8mm, Thickness=38.1±2mm, Uncoated, H-K9L Optical Glass, Parallelism: ＜5arcsec, United Optical Technology Co., Ltd (CAT#: STEM-OP-2982-YJL)
Dual Surface Optical Flats, Φ25.4mm, Thickness=12.7±1mm, Uncoated, H-K9L Optical Glass, United Optical Technology Co., Ltd (CAT#: STEM-OP-2983-YJL)
Dual Surface Optical Flats, Φ50.8mm, Thickness=12.7±1mm, Uncoated, H-K9L Optical Glass, United Optical Technology Co., Ltd (CAT#: STEM-OP-2984-YJL)
Dual Surface Optical Flats, Φ76.2mm, Thickness=19.1±1mm, Uncoated, H-K9L Optical Glass, United Optical Technology Co., Ltd (CAT#: STEM-OP-2985-YJL)
Dual Surface Optical Flats, Φ101.6mm, Thickness=19.1±1mm, Uncoated, H-K9L Optical Glass, United Optical Technology Co., Ltd (CAT#: STEM-OP-2986-YJL)