Tham khảo tài liệu 'handbook of optical materials part 11', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Wavelength nm O-I EY-1 discontinued 325 442 6321 1064 Verdet constant V rad T m -273 Loss coefficient a cm 1 Index of refraction n fraction n Wavelength nm O-I EY-2 discontinued 325 442 6321 1064 Verdet constant V rad T m -11 Loss coefficient a cm 1 Index of refraction n Optical Properties of Paramagnetic Faraday Rotator Glasses Glass type Transmission range pm Refractive index nD Abbe Nonlinear index n2 calc. 10--13esu number Vd dn dT 10-6 K FR-4 FR-5 FR-7 - M-18 M-24 - M-32 - Tb3 absorption line at pm. Mechanical and Thermal Properties of Paramagnetic Faraday Rotator Glasses Glass type Density g cm3 Young s modulus E 103 N mm2 Poisson s ratio n Knoop hardness N mm2 Thermal expansion 10-6 C Transform. temp c 40240 98 425 98 625 FR-5 108 7310 47 754 FR-7 - - 5070 398 M-18 113 7380 757 M-24 121 7500 775 M-32 120 7930 774 Data from manufactures sheets. 2003 by CRC Press LLC Gradient-Index Glasses Gradient-index GRIN glasses are ones in which the index of refraction varies spatially within the glass. A radial gradient is one that is symmetric about a line therefore the surfaces of constant index of refraction are cylinders. There are two commonly used mathematical representations for such gradients. The first used to specify products manufactured by Nippon Sheet Glass is N r N0 1 - Ar2 2 h4r4 h6r6 . . . the second is N r N00 N10r2 N20r4 . . . . In both cases the quadratic coefficient determines the focal length numerical aperture and other first-order properties of the lens. The higher-order coefficients determine the image quality. The tables below present catalog data for Nippon Sheet Glass NSG materials and those of Gradient Lens Corporation GLC together with calculated .
