Quartz materials (mainly high-purity fused silica glass) are optical materials with high transmittance over a wide spectrum, with core transmittance covering the deep ultraviolet to near-infrared range (185–350 nm).

1.China Standard Grades JGS Series, 10 mm thick, including surface reflection)

Fused Silica Glass Transmission

JGS1 (Far Ultraviolet Quartz)

185 nm: > 85%

200 nm: > 85%

220 nm: > 85%

240–2500 nm: > 90% (approximately 92–93% in the visible region)

JGS2 (Ultraviolet Quartz)

220 nm: > 80%

240–2500 nm: > 90% (approximately 92% in the visible region)

JGS3 (Infrared Quartz)

260 nm: > 80%

300–3500 nm: > 90%

Refractive of index of fused silica glass

2. Import Quartz Glass

Imported high-purity fused silica glass (optical grade) is mainly supplied by manufacturers such as Corning (USA), Heraeus (Germany), OHARA (Japan), and Tosoh (Japan). The core models are as follows.

I. Corning (USA) – HPFS SeriesCorning’s High Purity Fused Silica (HPFS) is an industry benchmark, with three main grades:

HPFS 7980Type: Standard / General-purpose synthetic fused silica (including sub-grades such as KrF, ArF, Mirror)Properties: High UV transmittance, low metallic impurities, OH content approx. 800–1000 ppmApplications: Semiconductor lithography, UV optics, conventional laser systems

HPFS 7979Type: Ultra-low hydroxyl infrared gradeProperties: OH content < 1 ppm, very low thermal expansion, excellent infrared transmittanceApplications: Infrared optics, precision interferometers, high-power infrared lasers

HPFS 8655Type: Deep Ultraviolet (DUV) gradeProperties: Extremely low metallic and hydroxyl content, extremely high transmittance at 193 nm (ArF)

Performance Comparison of Main Models

How to chose HPFS glass?please see the difference:

Application Scenarios of Grade 7979

Infrared-grade 7979 is an ideal window material for thermal imaging systems, CO₂ lasers, and infrared spectrometers. Its low OH content characteristic (<1 ppm) significantly reduces absorption peaks at 2.7 μm and 4.2 μm, raising the transmittance to over 90% in the 3–5 μm waveband. It has irreplaceable advantages in military fields such as quantum cascade lasers and infrared missile seekers.

Standard Grade 7980 – General-Purpose Solution

As the most widely used grade, 7980 is suitable for UV curing, excimer lasers, and lithography machine illumination systems. Its balanced performance-to-cost ratio makes it the first choice in scientific research and industrial fields. Typical applications include:

· Optical components for 193 nm/248 nm lithography machines

· Cuvettes for UV spectrophotometers

· High-power LED packaging cover plates

· Mirror blank materials for space telescopes

Special Grade 8655 – High-End Applications

Grade 8655 is the preferred choice when optical systems demand higher homogeneity and lower stress birefringence. Its refractive index homogeneity can reach within 3 ppm, with a birefringence value below 2 nm/cm. It is suitable for:

· Extreme Ultraviolet (EUV) lithography projection objectives

· Gravitational wave detection interferometers

· Resonant cavities for high-precision gyroscopes

· Astronomical observation etalons