Corning® HPFS® 7979, 7980, 8655 Fused Silica Optical Materials Product Information

HPFS® 7979, 7980 and 8655 Fused Silica Dedication to technology leadership and world-class metrology capabilities play a major role in Corning's ability to produce leading edge materials. Corning is committed to ensuring that its customers are provided qualified, authentic products. Corning has a minimum of 25 years of measurement experience and provides a certificate of compliance for each sale of product to verify the authenticity of our HPFS® Fused Silica Materials. Fused Silica is offered in many different grades to support various product applications. Glass codes 7980, 7979, and 8655 are...

* No visible fluorescence when exposed to deuterium source from 215 nm - 400 nm. Material contains hydrogen to minimize absorption under UV exposures. ** HPFS" 7980 Standard Fluorescence-Free Grade available upon request. Thermal Properties Unless otherwise stated, all values @ 25 °C Glass Code: Mirror Quality Grade Selection Chart Mirror Grade: Inclusion Classes

*1 Polynomial Equation: n2 = A0 + A1 A4 + A2 A2 + A3 A 2 + A4 A-4 + A5 A-6 + A6 A-8 + A7 A-10 with A in qm *2 Sellmeier Equation: n2-1 = A/2/( A2 - B) + A2 A2/( A2 - B) + A3 A2/( A2 - B) with A in qm *3 An/M Equation: An/AT[ppm/C] = C0 + C1A-2 + CA-4 + CA-6 with A in qm The above dispersion equations were fit to the refractive indices of 20 wavelengths from 1129 nm to 185 nm.

*1 Sellmeier Equation: n2-1 = A1 A2/( A2 - B1) + A2 A2/( A2 - B2) + A3 A2/( A2 - BJ + A4 A2/( A2 - B) with A in qm *2 An/AT Equation: An/AT[ppm/C] = D0 + D1A2 + DA-2 + D3A-4 + D4A-6 with A in qm The above Sellmeier dispersion equation was used to fit the refractive indices of 35 wavelengths from 2326 nm to 185 nm.

Broad Spectrum Internal Transmittance 100 90 80 70 HPFS® 7980 Standard Grade meets high Ti ≥ 88.00 %/cm @185 nm. (Equivalent to Te ≥ 80.00 %/cm @185 nm) HPFS® 7980 KrF Grade meets high Ti ≥ 99.90 %/cm @248 nm. HPFS® 7980 ArF Grade meets high Ti ≥ 99.50 %/cm @193 nm. HPFS® 8655 Grade meets high Ti ≥ 99.75 %/mm @193 nm. HPFS® 8655 Grade Typical initial absorption k: ≤ 0.0001/cm at 193 nm. Higher transmittance is available u

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