Dual Surface Optical Flats, Φ50.8mm, Thickness=12.7±1mm, Uncoated, UV Fused Silica, Parallelism: ＜1arcsec, United Optical Technology Co., Ltd (CAT#: STEM-OP-2992-YJL)

Dual Surface Optical Flats, Φ50.8mm, Thickness=12.7±1mm, Uncoated, UV Fused Silica, Parallelism: ＜1arcsec, model 192517, is manufactured by United Optical Technology Co., Ltd.
Both optical surfaces of UV Fused Silica Precision Dual Surface Optical Flats have been precision ground and polished. Both the upper and lower sides have high plane accuracy and high parallelism. Any side can be used as a standard plane. It is often used to detect and identify the flatness error and grinding performance of high-smooth surfaces of other components.
Each optical flat crystal is finely ground and tested using a Zygo interferometer to ensure surface accuracy.

Diameter: Φ50.8mm
Thickness: 12.7±1mm
Coating: Uncoated
Material: UV Fused Silica
Surface Accuracy: λ/20@633nm
Parallelism: ＜1arcsec
Surface Quality: 40/20-60/40
Diameter Tolerance: ±0.2mm
Bevel: Protective Bevel 0.2~0.5mmX45°
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UV fused silica glass material has a wider spectral range (185nm-2.1μm) than K9 optical glass. It has excellent transmittance in the ultraviolet band, has a lower refractive index, better uniformity, and a smaller thermal expansion coefficient. It also has higher chemical resistance and very low fluorescence, and can be used to make various optical components.

Dual Surface Optical Flats, Φ76.2mm, Thickness=19.1±1mm, Uncoated, UV Fused Silica, Parallelism: ＜1arcsec, United Optical Technology Co., Ltd (CAT#: STEM-OP-2993-YJL)
Dual Surface Optical Flats, Φ101.6mm, Thickness=19.1±1mm, Uncoated, UV Fused Silica, Parallelism: ＜1arcsec, United Optical Technology Co., Ltd (CAT#: STEM-OP-2994-YJL)
Dual Surface Optical Flats, Φ152.4mm, Thickness=25.4±2mm, Uncoated, UV Fused Silica, Parallelism: ＜1arcsec, United Optical Technology Co., Ltd (CAT#: STEM-OP-2995-YJL)
Dual Surface Optical Flats, Φ203.2mm, Thickness=38.1±2mm, Uncoated, UV Fused Silica, Parallelism: ＜1arcsec, United Optical Technology Co., Ltd (CAT#: STEM-OP-2996-YJL)
Dual Surface Optical Flats, Φ254.0mm, Thickness=38.1±2mm, Uncoated, UV Fused Silica, Parallelism: ＜1arcsec, United Optical Technology Co., Ltd (CAT#: STEM-OP-2997-YJL)
Dual Surface Optical Flats, Φ304.8mm, Thickness=38.1±2mm, Uncoated, UV Fused Silica, Parallelism: ＜1arcsec, United Optical Technology Co., Ltd (CAT#: STEM-OP-2998-YJL)