Optical Windows, Φ25.4mm, Thickness=4.0mm, λ/4, SWIR, H-K9L Optical Glass, United Optical Technology Co., Ltd (CAT#: STEM-OP-2736-YJL)

Optical Windows, Φ25.4mm, Thickness=4.0mm, λ/4, SWIR, H-K9L Optical Glass, model 180039, is manufactured by United Optical Technology Co., Ltd.
λ/4 Visible Windows are parallel plane panels that are usually used as protective windows for electronic sensors or detectors of the external environment. It protects electronic devices/sensors without changing the magnification of the optical system.

Diameter: Φ25.4mm
Coating: AR@900-1700nm
Material: H-K9L Optical Glass
Surface Accuracy: λ/4@633nm
Thickness: 4.0mm
Parallelism: ＜30arcsec
Surface Quality: 40/20-60/40
Diameter Tolerance: +0.0/-0.1mm
Thickness Tolerance: ±0.2mm
Bevel: Protective Bevel 0.2~0.5mmX45°

The standard surface accuracy of this product is λ/4, which can reduce beam distortion and scattering as much as possible.
The design of double-sided broadband anti-reflection coating also reduces the interference of ghost images to a great extent.

Optical Windows, Φ30.0mm, Thickness=4.0mm, λ/4, SWIR, H-K9L Optical Glass, United Optical Technology Co., Ltd (CAT#: STEM-OP-2737-YJL)
Optical Windows, Φ38.1mm, Thickness=4.0mm, λ/4, SWIR, H-K9L Optical Glass, United Optical Technology Co., Ltd (CAT#: STEM-OP-2738-YJL)
Optical Windows, Φ50.0mm, Thickness=4.0mm, λ/4, SWIR, H-K9L Optical Glass, United Optical Technology Co., Ltd (CAT#: STEM-OP-2739-YJL)
Optical Windows, Φ50.8mm, Thickness=4.0mm, λ/4, SWIR, H-K9L Optical Glass, United Optical Technology Co., Ltd (CAT#: STEM-OP-2740-YJL)
Optical Windows, Φ5.0mm, Thickness=2.0mm, λ/10, Uncoated, H-K9L Optical Glass, United Optical Technology Co., Ltd (CAT#: STEM-OP-2741-YJL)
Optical Windows, Φ10.0mm, Thickness=2.0mm, λ/10, Uncoated, H-K9L Optical Glass, United Optical Technology Co., Ltd (CAT#: STEM-OP-2742-YJL)