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Optical Windows

K9

Supplier

Zeit-group

Overview

An optical window is a transparent physical barrier that transmits light between different environments. Both surfaces are precision-polished, equivalent to an optical flat with λ/20 surface accuracy and 5-arcsecond parallelism. Available materials are H-K9L (N-BK7), synthetic fused silica and antireflection-coated H-K9L (N-BK7). H-K9L (N-BK7) is used in the visible and near-infrared. Quartz windows are used for ultraviolet transmission and as heat-insulating windows in environments up to 800°C. Uncoated H-K9L (N-BK7) transmits 92%, while antireflection-coated windows can exceed 99%. An ideal window meets the user's requirements, allows stable, unobstructed transmission and does not change beam characteristics.

Specifications

Parameter	Value
Material	H-K9L(N-BK7)
Surface Figure Accuracy	λ/20
Parallelism	≤5 arcsec
Surface Quality	10-5
Dimensional Tolerance	±0.1mm
Maximum Dimensions (Φ)	Φ1200mm
Refractive Indices [1014.0 nm]	1.50736
Refractive Indices [706.5 nm]	1.51289
Refractive Indices [656.3 nm]	1.51432
Refractive Indices [643.8 nm]	1.51472
Refractive Indices [632.8 nm]	1.51509
Refractive Indices [589.3 nm]	1.51673
Refractive Indices [587.6 nm]	1.51680
Refractive Indices [546.1 nm]	1.51872
Refractive Indices [486.1 nm]	1.52237
Refractive Indices [480.0 nm]	1.52282
Refractive Indices [435.8 nm]	1.52667
Refractive Indices [404.7 nm]	1.53022
Refractive Indices [365.0 nm]	1.53626
Constants of Dispersion Formula (A₀)	2.2719694
Constants of Dispersion Formula (A₁)	-9.9172187×10⁻³
Constants of Dispersion Formula (A₂)	1.0369753×10⁻²
Constants of Dispersion Formula (A₃)	3.1190380×10⁻⁴
Constants of Dispersion Formula (A₄)	-2.6458215×10⁻⁵
Constants of Dispersion Formula (A₅)	1.6475085×10⁻⁸
RC(S)	1
RA(S)	1
D_W	3
D_A	1
Internal Transmittance [2400 nm；5mm]	0.86
Internal Transmittance [2400 nm；10mm]	0.74
Internal Transmittance [2200 nm；5mm]	0.930
Internal Transmittance [2200 nm；10mm]	0.86
Internal Transmittance [2000 nm；5mm]	0.960
Internal Transmittance [2000 nm；10mm]	0.922
Internal Transmittance [1800 nm；5mm]	0.985
Internal Transmittance [1800 nm；10mm]	0.970
Internal Transmittance [1600 nm；5mm]	0.990
Internal Transmittance [1600 nm；10mm]	0.980
Internal Transmittance [1400 nm；5mm]	0.995
Internal Transmittance [1400 nm；10mm]	0.990
Internal Transmittance [1200 nm；5mm]	0.998
Internal Transmittance [1200 nm；10mm]	0.996
Internal Transmittance [1060 nm；5mm]	0.998
Internal Transmittance [1060 nm；10mm]	0.996
Internal Transmittance [1000 nm；5mm]	0.998
Internal Transmittance [1000 nm；10mm]	0.997
Internal Transmittance [950 nm；5mm]	0.998
Internal Transmittance [950 nm；10mm]	0.997
Internal Transmittance [900 nm；5mm]	0.999
Internal Transmittance [900 nm；10mm]	0.998
Internal Transmittance [850 nm；5mm]	0.999
Internal Transmittance [850 nm；10mm]	0.998
Internal Transmittance [800 nm；5mm]	0.999
Internal Transmittance [800 nm；10mm]	0.999
Internal Transmittance [700 nm；5mm]	0.999
Internal Transmittance [700 nm；10mm]	0.999
Internal Transmittance [650 nm；5mm]	0.999
Internal Transmittance [650 nm；10mm]	0.998
Internal Transmittance [600 nm；5mm]	0.999
Internal Transmittance [600 nm；10mm]	0.999
Internal Transmittance [550 nm；5mm]	0.999
Internal Transmittance [550 nm；10mm]	0.999
Internal Transmittance [500 nm；5mm]	0.999
Internal Transmittance [500 nm；10mm]	0.998
Internal Transmittance [480 nm；5mm]	0.999
Internal Transmittance [480 nm；10mm]	0.998
Internal Transmittance [460 nm；5mm]	0.999
Internal Transmittance [460 nm；10mm]	0.998
Internal Transmittance [440 nm；5mm]	0.999
Internal Transmittance [440 nm；10mm]	0.997
Internal Transmittance [420 nm；5mm]	0.999
Internal Transmittance [420 nm；10mm]	0.998
Internal Transmittance [400 nm；5mm]	0.999
Internal Transmittance [400 nm；10mm]	0.998
Internal Transmittance [390 nm；5mm]	0.998
Internal Transmittance [390 nm；10mm]	0.997
Internal Transmittance [380 nm；5mm]	0.997
Internal Transmittance [380 nm；10mm]	0.993
Internal Transmittance [370 nm；5mm]	0.997
Internal Transmittance [370 nm；10mm]	0.993
Internal Transmittance [360 nm；5mm]	0.994
Internal Transmittance [360 nm；10mm]	0.988
Internal Transmittance [350 nm；5mm]	0.977
Internal Transmittance [350 nm；10mm]	0.959
Internal Transmittance [340 nm；5mm]	0.977
Internal Transmittance [340 nm；10mm]	0.954
Internal Transmittance [330 nm；5mm]	0.95
Internal Transmittance [330 nm；10mm]	0.91
Internal Transmittance [320 nm；5mm]	0.90
Internal Transmittance [320 nm；10mm]	0.81
Internal Transmittance [310 nm；5mm]	0.80
Internal Transmittance [310 nm；10mm]	0.63
Internal Transmittance [300 nm；5mm]	0.61
Internal Transmittance [300 nm；10mm]	0.38
Internal Transmittance [290 nm；5mm]	0.36
Internal Transmittance [290 nm；10mm]	0.13
Internal Transmittance [280 nm；5mm]	0.14
Internal Transmittance [280 nm；10mm]	0.02
Temperature Coefficients of Refractive Index (dn/dt) [-40~-20；t]	0.5 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [-40~-20；C′]	0.7 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [-40~-20；d]	0.9 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [-40~-20；e]	1.3 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [-40~-20；F′]	1.5 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [-40~-20；g]	1.8 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [-20~0；t]	1.2 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [-20~0；C′]	1.3 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [-20~0；d]	1.5 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [-20~0；e]	1.6 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [-20~0；F′]	1.7 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [-20~0；g]	2.0 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [0~20；t]	0.8 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [0~20；C′]	1.5 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [0~20；d]	1.7 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [0~20；e]	1.5 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [0~20；F′]	2.0 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [0~20；g]	2.1 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [20~40；t]	1.1 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [20~40；C′]	1.3 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [20~40；d]	1.4 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [20~40；e]	1.5 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [20~40；F′]	1.7 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [20~40；g]	2.2 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [40~60；t]	1.4 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [40~60；C′]	1.5 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [40~60；d]	1.7 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [40~60；e]	1.9 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [40~60；F′]	2.4 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [40~60；g]	2.5 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [60~80；t]	1.4 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [60~80；C′]	1.9 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [60~80；d]	2.0 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [60~80；e]	2.3 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [60~80；F′]	2.2 10⁻⁶/°C
Temperature Coefficients of Refractive Index (dn/dt) [60~80；g]	2.8 10⁻⁶/°C

Datasheet

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Supplier Information

Zeit-group

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Chengdu Zhongke Zhuoer Intelligent Technology Group Co., Ltd. is a leading enterprise in the field of optics and semiconductors, recognized as a National High-Tech Enterprise, a Sichuan Province “Specialized, Refined, Distinctive, and Innovative” “Little Giant” Enterprise, a Chengdu New Economy “Double Hundred” Enterprise, and a Chengdu High-Tech Zone “Four Categories of High-Level Talent” Enterprise. Leveraging its exceptional technical capabilities—including independent R&D, patented technologies, and technological innovation—the company has achieved breakthroughs in ultra-precision polishing, precision inspection, and coating processes in the chip and display sectors. Its key products include high-end quartz blank masks, precision optical components and active devices, precision inspection equipment, and high-performance coating technology services, establishing the company as a core technology-driven enterprise with a competitive supply chain advantage in replacing imported products with domestically produced alternatives. To date, the company has been granted over 80 patents and collaborates with five affiliated institutions and scientific research units. It has established a precision optical processing production base and a precision optical system assembly and calibration center. The company has forged deep industry-academia-research partnerships with global research institutes, renowned universities, and industry associations in the optoelectronics field. Grounded in high-level scientific and technological self-reliance, it is committed to conquering key core technologies, continuously accumulating technical expertise, and tackling key process challenges, striving to become a leading enterprise in the development and industrialization of high-tech optoelectronic products. Through continuous efforts, Zhongke Zhuoer has achieved one qualitative leap after another. In the future, the company will deepen collaborative partnerships along the industry value chain to enhance its core capabilities, embrace innovation, and contribute to the development of critical upstream materials and integrated process technologies for China’s optoelectronics industry.

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