JGS1 is a synthetic UV-grade quartz glass suitable for optical applications equivalent to Corning 7980. JGS1 has high transmission across the UV to the NIR spectrum (180-2500nm), and is particularly advantageous for application in the UV range. However, like most UV grade Fused Silica, JGS1 contains relatively higher OH compositions than the IR grade Fused Silica, which leads to higher absorption in the IR band.
JGS1 provided by Shalom EO is similar to Heraeus Suprasil 1 and 2, Saint-Gobain Spectrosil A and B, Corning 7980, Dynasil’s 1100 and 4100.
Figure 1. Transmission curve of JGS1
Physical and Optical Properties:
Basic Properties
Density
2.20g/cm^3
Homogeneity
1-2
Bubble Class
0
Optical Properties
Application Wavelength range
180-2500nm, Average Transmission 90%
Abbe Constant
67.6
Refractive Index (Measure at 588nm)
1.4586
Fluorescence
1
Radiation Performance
No Discoloration
Mechanical Properties
Designed Compressive strength
1100Mpa
Design Tensile Strength
48Mpa (7000 psi)
Designed Bending strength
67Mpa
Bulk Modulus
>1100MPa (160,000 psi)
Rigidity Modulus
31000MPa (4.5x10^6 psi)
Young's Modulus
72000Mpa
Poisson's Ratio
0.17
Moh’s Hardness
5.5 - 6.5
Thermal and Electrical Properties
Thermal Expansion Coefficient
5.5x10^-7 cm/cm.°C @20°C-320°C
Thermal Conductivity
1.4 W/m.°C
Specific Heat
670 J/kg.°C
Softening Point
1683°C
Annealing Point
1215°C
Strain Point
1120°C
Electrical Receptivity
7x10^7 ohm.cm (350°C)
Dielectric Properties (20°C and 1 MHz)
Constant
3.75
Strength
5x10^7 V/m
Loss Factor
<4x10^-4
Dissipation Factor
<1x10^-4
Velocity of Sound-Shear Wave
3.75x10^3 m/s
Sonic Attenuation
<11 db/m MHz
Chemical Properties
Chemical Stability
Highly Resistant to Water and all acids except Hydrofluoric
Refractive Index
Wavelength (um)
Refractive Index (n)
0.200
1.55051
1.000
1.45042
0.220
1.52845
1.100
1.44920
0.250
1.50745
1.200
1.44805
0.300
1.48779
1.300
1.44692
0.320
1.48274
1.500
1.44462
0.360
1.47529
1.600
1.44342
0.400
1.47012
1.700
1.44217
0.450
1.46557
1.800
1.44087
0.488
1.46302
1.900
1.43951
Tags: JGS1