Single Surface Optical Flats, Φ25.4mm, Thickness=12.7±1mm, Uncoated, H-K9L Optical Glass, Parallelism: ＜1arcmin, United Optical Technology Co., Ltd (CAT#: STEM-OP-3023-YJL)

Single Surface Optical Flats, Φ25.4mm, Thickness=12.7±1mm, Uncoated, H-K9L Optical Glass, Parallelism: ＜1arcmin, model 192548, is manufactured by United Optical Technology Co., Ltd.
One optical surface of K9 Single Surface Optical Flats has been precision ground and polished. Its flatness accuracy is very high and is often used as a standard flat surface. It is used to detect and identify the flatness error and grinding performance of other components' high-gloss surfaces.
Each optical flat crystal is finely ground and tested using a Zygo interferometer to ensure surface accuracy.

Diameter: Φ25.4mm
Thickness: 12.7±1mm
Coating: Uncoated
Material: H-K9L Optical Glass
Surface Accuracy: λ/20@633nm
Parallelism: ＜1arcmin
Surface Quality: 40/20-60/40
Diameter Tolerance: ±0.2mm
Bevel: Protective Bevel 0.2~0.5mmX45°
Back: Fine Ground

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.

Single Surface Optical Flats, Φ50.8mm, Thickness=12.7±1mm, Uncoated, H-K9L Optical Glass, Parallelism: ＜1arcmin, United Optical Technology Co., Ltd (CAT#: STEM-OP-3024-YJL)
Single Surface Optical Flats, Φ76.2mm, Thickness=19.1±1mm, Uncoated, H-K9L Optical Glass, Parallelism: ＜1arcmin, United Optical Technology Co., Ltd (CAT#: STEM-OP-3025-YJL)
Single Surface Optical Flats, Φ101.6mm, Thickness=19.1±1mm, Uncoated, H-K9L Optical Glass, Parallelism: ＜1arcmin, United Optical Technology Co., Ltd (CAT#: STEM-OP-3026-YJL)
Single Surface Optical Flats, Φ152.4mm, Thickness=25.4±2mm, Uncoated, H-K9L Optical Glass, Parallelism: ＜1arcmin, United Optical Technology Co., Ltd (CAT#: STEM-OP-3027-YJL)
Single Surface Optical Flats, Φ203.2mm, Thickness=38.1±2mm, Uncoated, H-K9L Optical Glass, Parallelism: ＜1arcmin, United Optical Technology Co., Ltd (CAT#: STEM-OP-3028-YJL)
Single Surface Optical Flats, Φ254.0mm, Thickness=38.1±2mm, Uncoated, H-K9L Optical Glass, Parallelism: ＜1arcmin, United Optical Technology Co., Ltd (CAT#: STEM-OP-3029-YJL)